* [git pull] x86 updates for v2.6.28, phase #6, misc
@ 2008-10-10 0:08 Ingo Molnar
2008-10-10 3:43 ` Nick Piggin
2008-10-10 18:41 ` [git pull, take 2] " Ingo Molnar
0 siblings, 2 replies; 6+ messages in thread
From: Ingo Molnar @ 2008-10-10 0:08 UTC (permalink / raw)
To: Linus Torvalds
Cc: linux-kernel, Andrew Morton, Thomas Gleixner, H. Peter Anvin
Linus,
Please pull the latest x86-v28-for-linus-phase6 git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git x86-v28-for-linus-phase6
tip/x86/core: various x86 updates independent of the sparse irqs support
tree.
out-of-topic modifications in x86-v28-for-linus-phase6:
-------------------------------------------------------
include/linux/kernel.h # d974ae3: generic, memparse(): constify arg
include/linux/mm.h # f7d0b92: mm: define USE_SPLIT_PTLOCKS rath
# 59ea746: MM: virtual address debug
include/linux/mm_types.h # f7d0b92: mm: define USE_SPLIT_PTLOCKS rath
include/linux/mmdebug.h # 7aa413d: x86, MM: virtual address debug, c
# 59ea746: MM: virtual address debug
lib/cmdline.c # d974ae3: generic, memparse(): constify arg
mm/vmalloc.c # 7aa413d: x86, MM: virtual address debug, c
# 59ea746: MM: virtual address debug
Thanks,
Ingo
------------------>
Alex Nixon (10):
x86: add cpu hotplug hooks into smp_ops
x86_32: clean up play_dead
x86: unify x86_32 and x86_64 play_dead into one function
x86: separate generic cpu disabling code from APIC writes in cpu_disable
xen: implement CPU hotplugging
Xen: fix cpu_hotplug.c build by replacing is_running_on_xen() with xen_pv_domain()
Xen: fix cpu_hotplug build when !CONFIG_SMP
x86: build fix for !CONFIG_SMP
x86, xen: fix build when !CONFIG_HOTPLUG_CPU
xen: make CPU hotplug functions static
Alexander van Heukelum (47):
i386: remove kprobes' restore_interrupts in favour of conditional_sti
i386: prepare to convert exceptions to interrupts
i386: convert hardware exception 0 to an interrupt gate
i386: expand exception 3 DO_TRAP macro
i386: convert hardware exception 4 to an interrupt gate
i386: convert hardware exception 5 to an interrupt gate
i386: convert hardware exception 6 to an interrupt gate
i386: convert hardware exception 7 to an interrupt gate
i386: convert hardware exception 9 to an interrupt gate
i386: convert hardware exception 10 to an interrupt gate
i386: convert hardware exception 11 to an interrupt gate
i386: convert hardware exception 12 to an interrupt gate
i386: convert hardware exception 13 to an interrupt gate
i386: convert hardware exception 15 to an interrupt gate
i386: convert hardware exception 16 to an interrupt gate
i386: convert hardware exception 17 to an interrupt gate
i386: convert hardware exception 18 to an interrupt gate
i386: convert hardware exception 19 to an interrupt gate
i386: remove temporary DO_TRAP macros, expanding the last one used
i386: add TRACE_IRQS_OFF to entry_32.S in 'error_code'
i386: add TRACE_IRQS_OFF for exception 1 (debug)
i386: add TRACE_IRQS_OFF for the nmi
i386: add TRACE_IRQS_OFF for the exception 3 (int3)
i386: trace_hardirqs_fixup should now not be necessary: irqs are off.
traps: x86_64: add TRACE_IRQS_OFF in error_entry
traps: x86_64: add TRACE_IRQS_OFF in paranoidentry macro
traps: x86_64: remove trace_hardirqs_fixup from DO_ERROR_INFO macro
traps: x86_64: remove trace_hardirqs_fixup from int3 handler
traps: x86_64: remove trace_hardirqs_fixup from debug handler
traps: x86: remove trace_hardirqs_fixup from pagefault handler
traps: i386: make do_trap more like x86_64
i386: split out dumpstack code from traps_32.c
x86_64: split out dumpstack code from traps_64.c
fix: x86: remove cpu_vendor_dev
x86, traps: split out math_error and simd_math_error
x86, traps, i386: factor out lazy io-bitmap copy
x86, traps: introduce dotraplinkage
x86, traps: converge do_debug handlers
traps: x86: converge trap_init functions
traps: x86_64: make math_state_restore more like i386
traps: i386: use preempt_conditional_sti/cli in do_int3
traps: x86_64: make io_check_error equal to the one on i386
traps: i386: expand clear_mem_error and remove from mach_traps.h
traps: x86_64: use task_pid_nr(tsk) instead of tsk->pid in do_general_protection
traps: x86: various noop-changes preparing for unification of traps_xx.c
traps: x86: make traps_32.c and traps_64.c equal
traps: x86: finalize unification of traps.c
Chuck Ebbert (2):
x86: move prefill_possible_map calling early, fix, V2
x86: allow number of additional hotplug CPUs to be set at compile time, V2
Cyrill Gorcunov (1):
x86: smpboot - check if we have ESR register in wakeup_secondary_cpu
Eduardo Habkost (2):
x86, xen: Use native_pte_flags instead of native_pte_val for .pte_flags
xen_alloc_ptpage: cast PFN_PHYS() argument to unsigned long
Ingo Molnar (10):
x86, MM: virtual address debug, cleanups
x86: x86_{phys,virt}_bits field also for i386, fix
Revert "x86: x86_{phys,virt}_bits field also for i386, fix"
Revert "x86: x86_{phys,virt}_bits field also for i386 (v2)"
x86: print out EBDA/lowmem address
x86: add PCI IDs for AMD Barcelona PCI devices
x86: __show_registers() and __show_regs() API unification, fixlet
x86: remove additional_cpus configurability
Revert "acpi/x86: introduce __apci_map_table, v4"
Revert "acpi: remove final __acpi_map_table mapping before setting acpi_gbl_permanent_mmap"
Jack Steiner (1):
x86, UV: new UV genapic functions for x2apic
Jan Beulich (7):
x86: adjust vmalloc_sync_all() for Xen (2nd try)
x86-64: reduce boot fixmap space
x86-64: slightly stream-line 32-bit syscall entry code
x86: x86_{phys,virt}_bits field also for i386 (v2)
x86-64: fix combining of regions in init_memory_mapping()
x86: make mm/gup.c more virtualization friendly
x86: adjust dependencies for CONFIG_X86_CMOV
Jeremy Fitzhardinge (30):
x86/paravirt/xen: properly fill out the ldt ops
x86: split spinlock implementations out into their own files
x86: fix initialization of 'l' bit in ldt descriptors
xen: fix allocation and use of large ldts
generic, memparse(): constify argument
xen-balloon: fix up sysfs issues
xen-balloon: clean up unused functions
xen: suppress known wrmsrs
xen: compile irq functions without -pg for ftrace
xen: fix allocation and use of large ldts, cleanup
xen: clean up domain mode predicates
x86/paravirt: add spin_lock_flags lock op
xen: clarify locking used when pinning a pagetable.
xen: add xen_ prefixes to make tracing with ftrace easier
xen: save previous spinlock when blocking
xen: add debugfs support
xen: allow interrupts to be enabled while doing a blocking spin
xen: measure how long spinlocks spend blocking
x86: build fix in "xen spinlock updates and performance measurements"
x86: export pv_lock_ops non-GPL
x86: add _PAGE_IOMAP pte flag for IO mappings
x86: remove duplicate early_ioremap declarations
x86: add early_memremap()
x86: use early_memremap() in setup.c
x86-64: don't check for map replacement
x86: use early_ioremap in __acpi_map_table
x86: always explicitly map acpi memory
mm: define USE_SPLIT_PTLOCKS rather than repeating expression
xen: fix pinning when not using split pte locks
acpi: remove final __acpi_map_table mapping before setting acpi_gbl_permanent_mmap
Jiri Slaby (2):
MM: virtual address debug
x86, MM: virtual address debug, v2
Krzysztof Helt (2):
x86: merge winchip-2 and winchip-2a cpu choices
x86: do not allow to optimize flag_is_changeable_p() (rev. 2)
Manfred Spraul (1):
arch/x86/kernel/smpboot.c: Clarify when irq processing begins.
Pekka Enberg (1):
x86: __show_registers() and __show_regs() API unification
Thomas Gleixner (2):
x86: improve UP kernel when CPU-hotplug and SMP is enabled
x86: remove additional_cpus
Vegard Nossum (2):
x86: add memory clobber in switch_to()
x86: fix virt_addr_valid() with CONFIG_DEBUG_VIRTUAL=y, v2
Yinghai Lu (5):
x86: rename discontig_32.c to numa_32.c
x86: change early_ioremap to use slots instead of nesting
acpi/x86: introduce __apci_map_table, v4
x86: check dsdt before find oem table for es7000, v2
x86: cpu don't print duplicated vendor string
arch/x86/Kconfig.cpu | 29 +-
arch/x86/Makefile_32.cpu | 1 -
arch/x86/configs/i386_defconfig | 1 -
arch/x86/configs/x86_64_defconfig | 1 -
arch/x86/ia32/ia32entry.S | 26 +-
arch/x86/kernel/Makefile | 6 +-
arch/x86/kernel/acpi/boot.c | 34 +-
arch/x86/kernel/alternative.c | 2 +-
arch/x86/kernel/cpu/common.c | 48 +-
arch/x86/kernel/doublefault_32.c | 2 +-
arch/x86/kernel/dumpstack_32.c | 422 ++++++++++
arch/x86/kernel/dumpstack_64.c | 565 ++++++++++++++
arch/x86/kernel/entry_32.S | 22 +-
arch/x86/kernel/entry_64.S | 8 +-
arch/x86/kernel/es7000_32.c | 28 +-
arch/x86/kernel/genx2apic_uv_x.c | 10 +-
arch/x86/kernel/head.c | 1 +
arch/x86/kernel/ldt.c | 9 +-
arch/x86/kernel/paravirt-spinlocks.c | 37 +
arch/x86/kernel/paravirt.c | 27 +-
arch/x86/kernel/process_32.c | 43 +-
arch/x86/kernel/process_64.c | 37 +-
arch/x86/kernel/setup.c | 8 +-
arch/x86/kernel/smp.c | 6 +-
arch/x86/kernel/smpboot.c | 164 +++--
arch/x86/kernel/tlb_32.c | 8 +
arch/x86/kernel/{traps_32.c => traps.c} | 860 ++++++++-------------
arch/x86/kernel/traps_64.c | 1214 -----------------------------
arch/x86/kernel/vmlinux_64.lds.S | 2 +-
arch/x86/mach-generic/es7000.c | 20 +-
arch/x86/mm/Makefile | 6 +-
arch/x86/mm/fault.c | 19 +-
arch/x86/mm/gup.c | 10 +-
arch/x86/mm/init_32.c | 2 +-
arch/x86/mm/init_64.c | 9 +-
arch/x86/mm/ioremap.c | 168 ++++-
arch/x86/mm/{discontig_32.c => numa_32.c} | 0
arch/x86/xen/Kconfig | 10 +-
arch/x86/xen/Makefile | 12 +-
arch/x86/xen/debugfs.c | 123 +++
arch/x86/xen/debugfs.h | 10 +
arch/x86/xen/enlighten.c | 189 ++---
arch/x86/xen/irq.c | 143 ++++
arch/x86/xen/mmu.c | 270 ++++++-
arch/x86/xen/multicalls.c | 115 +++-
arch/x86/xen/smp.c | 245 ++-----
arch/x86/xen/spinlock.c | 428 ++++++++++
arch/x86/xen/time.c | 12 +-
arch/x86/xen/xen-asm_32.S | 2 +-
arch/x86/xen/xen-asm_64.S | 2 +-
arch/x86/xen/xen-ops.h | 8 +
drivers/block/xen-blkfront.c | 2 +-
drivers/char/hvc_xen.c | 6 +-
drivers/input/xen-kbdfront.c | 4 +-
drivers/net/xen-netfront.c | 6 +-
drivers/video/xen-fbfront.c | 4 +-
drivers/xen/Makefile | 1 +
drivers/xen/balloon.c | 174 +----
drivers/xen/cpu_hotplug.c | 90 +++
drivers/xen/events.c | 40 +-
drivers/xen/grant-table.c | 2 +-
drivers/xen/xenbus/xenbus_probe.c | 8 +-
include/asm-x86/acpi.h | 3 -
include/asm-x86/desc.h | 29 +-
include/asm-x86/es7000/mpparse.h | 1 +
include/asm-x86/fixmap_32.h | 8 +-
include/asm-x86/fixmap_64.h | 16 +-
include/asm-x86/io.h | 15 +-
include/asm-x86/io_64.h | 3 -
include/asm-x86/irqflags.h | 21 -
include/asm-x86/kdebug.h | 3 +-
include/asm-x86/kprobes.h | 9 -
include/asm-x86/mach-default/mach_traps.h | 6 -
include/asm-x86/mmzone_64.h | 3 +-
include/asm-x86/module.h | 2 -
include/asm-x86/nmi.h | 4 -
include/asm-x86/page.h | 8 +-
include/asm-x86/page_32.h | 13 +-
include/asm-x86/paravirt.h | 20 +
include/asm-x86/pgtable.h | 16 +-
include/asm-x86/ptrace.h | 4 -
include/asm-x86/smp.h | 40 +-
include/asm-x86/spinlock.h | 9 +-
include/asm-x86/system.h | 5 +-
include/asm-x86/tlbflush.h | 10 +
include/asm-x86/traps.h | 73 +-
include/asm-x86/xen/hypervisor.h | 14 +-
include/linux/kernel.h | 2 +-
include/linux/mm.h | 13 +-
include/linux/mm_types.h | 10 +-
include/linux/mmdebug.h | 18 +
include/linux/sched.h | 6 +-
include/xen/events.h | 2 +
lib/Kconfig.debug | 9 +
lib/cmdline.c | 2 +-
mm/vmalloc.c | 7 +
96 files changed, 3373 insertions(+), 2792 deletions(-)
create mode 100644 arch/x86/kernel/dumpstack_32.c
create mode 100644 arch/x86/kernel/dumpstack_64.c
create mode 100644 arch/x86/kernel/paravirt-spinlocks.c
rename arch/x86/kernel/{traps_32.c => traps.c} (60%)
delete mode 100644 arch/x86/kernel/traps_64.c
rename arch/x86/mm/{discontig_32.c => numa_32.c} (100%)
create mode 100644 arch/x86/xen/debugfs.c
create mode 100644 arch/x86/xen/debugfs.h
create mode 100644 arch/x86/xen/irq.c
create mode 100644 arch/x86/xen/spinlock.c
create mode 100644 drivers/xen/cpu_hotplug.c
create mode 100644 include/linux/mmdebug.h
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index f8843c3..52763b7 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -38,8 +38,7 @@ config M386
- "Crusoe" for the Transmeta Crusoe series.
- "Efficeon" for the Transmeta Efficeon series.
- "Winchip-C6" for original IDT Winchip.
- - "Winchip-2" for IDT Winchip 2.
- - "Winchip-2A" for IDT Winchips with 3dNow! capabilities.
+ - "Winchip-2" for IDT Winchips with 3dNow! capabilities.
- "GeodeGX1" for Geode GX1 (Cyrix MediaGX).
- "Geode GX/LX" For AMD Geode GX and LX processors.
- "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3.
@@ -194,19 +193,11 @@ config MWINCHIPC6
treat this chip as a 586TSC with some extended instructions
and alignment requirements.
-config MWINCHIP2
- bool "Winchip-2"
- depends on X86_32
- help
- Select this for an IDT Winchip-2. Linux and GCC
- treat this chip as a 586TSC with some extended instructions
- and alignment requirements.
-
config MWINCHIP3D
- bool "Winchip-2A/Winchip-3"
+ bool "Winchip-2/Winchip-2A/Winchip-3"
depends on X86_32
help
- Select this for an IDT Winchip-2A or 3. Linux and GCC
+ Select this for an IDT Winchip-2, 2A or 3. Linux and GCC
treat this chip as a 586TSC with some extended instructions
and alignment requirements. Also enable out of order memory
stores for this CPU, which can increase performance of some
@@ -318,7 +309,7 @@ config X86_L1_CACHE_SHIFT
int
default "7" if MPENTIUM4 || X86_GENERIC || GENERIC_CPU || MPSC
default "4" if X86_ELAN || M486 || M386 || MGEODEGX1
- default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
+ default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MVIAC7
config X86_XADD
@@ -360,7 +351,7 @@ config X86_POPAD_OK
config X86_ALIGNMENT_16
def_bool y
- depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1
+ depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1
config X86_INTEL_USERCOPY
def_bool y
@@ -368,7 +359,7 @@ config X86_INTEL_USERCOPY
config X86_USE_PPRO_CHECKSUM
def_bool y
- depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX || MCORE2
+ depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX || MCORE2
config X86_USE_3DNOW
def_bool y
@@ -376,7 +367,7 @@ config X86_USE_3DNOW
config X86_OOSTORE
def_bool y
- depends on (MWINCHIP3D || MWINCHIP2 || MWINCHIPC6) && MTRR
+ depends on (MWINCHIP3D || MWINCHIPC6) && MTRR
#
# P6_NOPs are a relatively minor optimization that require a family >=
@@ -396,7 +387,7 @@ config X86_P6_NOP
config X86_TSC
def_bool y
- depends on ((MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ) || X86_64
+ depends on ((MWINCHIP3D || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ) || X86_64
config X86_CMPXCHG64
def_bool y
@@ -406,7 +397,7 @@ config X86_CMPXCHG64
# generates cmov.
config X86_CMOV
def_bool y
- depends on (MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || X86_64)
+ depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64)
config X86_MINIMUM_CPU_FAMILY
int
@@ -417,7 +408,7 @@ config X86_MINIMUM_CPU_FAMILY
config X86_DEBUGCTLMSR
def_bool y
- depends on !(MK6 || MWINCHIPC6 || MWINCHIP2 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486 || M386)
+ depends on !(MK6 || MWINCHIPC6 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486 || M386)
menuconfig PROCESSOR_SELECT
default y
diff --git a/arch/x86/Makefile_32.cpu b/arch/x86/Makefile_32.cpu
index e372b58..12bdd85 100644
--- a/arch/x86/Makefile_32.cpu
+++ b/arch/x86/Makefile_32.cpu
@@ -28,7 +28,6 @@ cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,-march=athlon)
cflags-$(CONFIG_MCRUSOE) += -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
cflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586)
-cflags-$(CONFIG_MWINCHIP2) += $(call cc-option,-march=winchip2,-march=i586)
cflags-$(CONFIG_MWINCHIP3D) += $(call cc-option,-march=winchip2,-march=i586)
cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686)
diff --git a/arch/x86/configs/i386_defconfig b/arch/x86/configs/i386_defconfig
index ef9a520..9269ef4 100644
--- a/arch/x86/configs/i386_defconfig
+++ b/arch/x86/configs/i386_defconfig
@@ -213,7 +213,6 @@ CONFIG_M686=y
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
-# CONFIG_MWINCHIP2 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
diff --git a/arch/x86/configs/x86_64_defconfig b/arch/x86/configs/x86_64_defconfig
index e620ea6..638bc85 100644
--- a/arch/x86/configs/x86_64_defconfig
+++ b/arch/x86/configs/x86_64_defconfig
@@ -210,7 +210,6 @@ CONFIG_X86_PC=y
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
-# CONFIG_MWINCHIP2 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S
index ffc1bb4..eb43147 100644
--- a/arch/x86/ia32/ia32entry.S
+++ b/arch/x86/ia32/ia32entry.S
@@ -39,11 +39,11 @@
.endm
/* clobbers %eax */
- .macro CLEAR_RREGS
+ .macro CLEAR_RREGS _r9=rax
xorl %eax,%eax
movq %rax,R11(%rsp)
movq %rax,R10(%rsp)
- movq %rax,R9(%rsp)
+ movq %\_r9,R9(%rsp)
movq %rax,R8(%rsp)
.endm
@@ -52,11 +52,10 @@
* We don't reload %eax because syscall_trace_enter() returned
* the value it wants us to use in the table lookup.
*/
- .macro LOAD_ARGS32 offset
- movl \offset(%rsp),%r11d
- movl \offset+8(%rsp),%r10d
+ .macro LOAD_ARGS32 offset, _r9=0
+ .if \_r9
movl \offset+16(%rsp),%r9d
- movl \offset+24(%rsp),%r8d
+ .endif
movl \offset+40(%rsp),%ecx
movl \offset+48(%rsp),%edx
movl \offset+56(%rsp),%esi
@@ -145,7 +144,7 @@ ENTRY(ia32_sysenter_target)
SAVE_ARGS 0,0,1
/* no need to do an access_ok check here because rbp has been
32bit zero extended */
-1: movl (%rbp),%r9d
+1: movl (%rbp),%ebp
.section __ex_table,"a"
.quad 1b,ia32_badarg
.previous
@@ -157,7 +156,7 @@ ENTRY(ia32_sysenter_target)
cmpl $(IA32_NR_syscalls-1),%eax
ja ia32_badsys
sysenter_do_call:
- IA32_ARG_FIXUP 1
+ IA32_ARG_FIXUP
sysenter_dispatch:
call *ia32_sys_call_table(,%rax,8)
movq %rax,RAX-ARGOFFSET(%rsp)
@@ -234,20 +233,17 @@ sysexit_audit:
#endif
sysenter_tracesys:
- xchgl %r9d,%ebp
#ifdef CONFIG_AUDITSYSCALL
testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags(%r10)
jz sysenter_auditsys
#endif
SAVE_REST
CLEAR_RREGS
- movq %r9,R9(%rsp)
movq $-ENOSYS,RAX(%rsp)/* ptrace can change this for a bad syscall */
movq %rsp,%rdi /* &pt_regs -> arg1 */
call syscall_trace_enter
LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
RESTORE_REST
- xchgl %ebp,%r9d
cmpl $(IA32_NR_syscalls-1),%eax
ja int_ret_from_sys_call /* sysenter_tracesys has set RAX(%rsp) */
jmp sysenter_do_call
@@ -314,9 +310,9 @@ ENTRY(ia32_cstar_target)
testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10)
CFI_REMEMBER_STATE
jnz cstar_tracesys
-cstar_do_call:
cmpl $IA32_NR_syscalls-1,%eax
ja ia32_badsys
+cstar_do_call:
IA32_ARG_FIXUP 1
cstar_dispatch:
call *ia32_sys_call_table(,%rax,8)
@@ -357,15 +353,13 @@ cstar_tracesys:
#endif
xchgl %r9d,%ebp
SAVE_REST
- CLEAR_RREGS
- movq %r9,R9(%rsp)
+ CLEAR_RREGS r9
movq $-ENOSYS,RAX(%rsp) /* ptrace can change this for a bad syscall */
movq %rsp,%rdi /* &pt_regs -> arg1 */
call syscall_trace_enter
- LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
+ LOAD_ARGS32 ARGOFFSET, 1 /* reload args from stack in case ptrace changed it */
RESTORE_REST
xchgl %ebp,%r9d
- movl RSP-ARGOFFSET(%rsp), %r8d
cmpl $(IA32_NR_syscalls-1),%eax
ja int_ret_from_sys_call /* cstar_tracesys has set RAX(%rsp) */
jmp cstar_do_call
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index c9be69f..f6160cc 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -10,7 +10,7 @@ ifdef CONFIG_FTRACE
# Do not profile debug and lowlevel utilities
CFLAGS_REMOVE_tsc.o = -pg
CFLAGS_REMOVE_rtc.o = -pg
-CFLAGS_REMOVE_paravirt.o = -pg
+CFLAGS_REMOVE_paravirt-spinlocks.o = -pg
endif
#
@@ -23,7 +23,7 @@ CFLAGS_hpet.o := $(nostackp)
CFLAGS_tsc.o := $(nostackp)
obj-y := process_$(BITS).o signal_$(BITS).o entry_$(BITS).o
-obj-y += traps_$(BITS).o irq_$(BITS).o
+obj-y += traps.o irq_$(BITS).o dumpstack_$(BITS).o
obj-y += time_$(BITS).o ioport.o ldt.o
obj-y += setup.o i8259.o irqinit_$(BITS).o setup_percpu.o
obj-$(CONFIG_X86_VISWS) += visws_quirks.o
@@ -90,7 +90,7 @@ obj-$(CONFIG_DEBUG_NX_TEST) += test_nx.o
obj-$(CONFIG_VMI) += vmi_32.o vmiclock_32.o
obj-$(CONFIG_KVM_GUEST) += kvm.o
obj-$(CONFIG_KVM_CLOCK) += kvmclock.o
-obj-$(CONFIG_PARAVIRT) += paravirt.o paravirt_patch_$(BITS).o
+obj-$(CONFIG_PARAVIRT) += paravirt.o paravirt_patch_$(BITS).o paravirt-spinlocks.o
obj-$(CONFIG_PARAVIRT_CLOCK) += pvclock.o
obj-$(CONFIG_PCSPKR_PLATFORM) += pcspeaker.o
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 0ff30ae..e8ddc8b 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -121,35 +121,19 @@ enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
*/
char *__init __acpi_map_table(unsigned long phys, unsigned long size)
{
- unsigned long base, offset, mapped_size;
- int idx;
+ static char *prev_map;
+ static unsigned long prev_size;
if (!phys || !size)
return NULL;
- if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT))
- return __va(phys);
+ if (prev_map)
+ early_iounmap(prev_map, prev_size);
- offset = phys & (PAGE_SIZE - 1);
- mapped_size = PAGE_SIZE - offset;
- clear_fixmap(FIX_ACPI_END);
- set_fixmap(FIX_ACPI_END, phys);
- base = fix_to_virt(FIX_ACPI_END);
+ prev_size = size;
+ prev_map = early_ioremap(phys, size);
- /*
- * Most cases can be covered by the below.
- */
- idx = FIX_ACPI_END;
- while (mapped_size < size) {
- if (--idx < FIX_ACPI_BEGIN)
- return NULL; /* cannot handle this */
- phys += PAGE_SIZE;
- clear_fixmap(idx);
- set_fixmap(idx, phys);
- mapped_size += PAGE_SIZE;
- }
-
- return ((unsigned char *)base + offset);
+ return prev_map;
}
#ifdef CONFIG_PCI_MMCONFIG
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index fb04e49..a84ac7b 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -444,7 +444,7 @@ void __init alternative_instructions(void)
_text, _etext);
/* Only switch to UP mode if we don't immediately boot others */
- if (num_possible_cpus() == 1 || setup_max_cpus <= 1)
+ if (num_present_cpus() == 1 || setup_max_cpus <= 1)
alternatives_smp_switch(0);
}
#endif
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index d0abfd8..e378a16 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -124,18 +124,25 @@ static inline int flag_is_changeable_p(u32 flag)
{
u32 f1, f2;
- asm("pushfl\n\t"
- "pushfl\n\t"
- "popl %0\n\t"
- "movl %0,%1\n\t"
- "xorl %2,%0\n\t"
- "pushl %0\n\t"
- "popfl\n\t"
- "pushfl\n\t"
- "popl %0\n\t"
- "popfl\n\t"
- : "=&r" (f1), "=&r" (f2)
- : "ir" (flag));
+ /*
+ * Cyrix and IDT cpus allow disabling of CPUID
+ * so the code below may return different results
+ * when it is executed before and after enabling
+ * the CPUID. Add "volatile" to not allow gcc to
+ * optimize the subsequent calls to this function.
+ */
+ asm volatile ("pushfl\n\t"
+ "pushfl\n\t"
+ "popl %0\n\t"
+ "movl %0,%1\n\t"
+ "xorl %2,%0\n\t"
+ "pushl %0\n\t"
+ "popfl\n\t"
+ "pushfl\n\t"
+ "popl %0\n\t"
+ "popfl\n\t"
+ : "=&r" (f1), "=&r" (f2)
+ : "ir" (flag));
return ((f1^f2) & flag) != 0;
}
@@ -574,6 +581,10 @@ void __init early_cpu_init(void)
* The NOPL instruction is supposed to exist on all CPUs with
* family >= 6; unfortunately, that's not true in practice because
* of early VIA chips and (more importantly) broken virtualizers that
+ *
+ * Note: no 64-bit chip is known to lack these, but put the code here
+ * for consistency with 32 bits, and to make it utterly trivial to
+ * diagnose the problem should it ever surface.
* are not easy to detect. In the latter case it doesn't even *fail*
* reliably, so probing for it doesn't even work. Disable it completely
* unless we can find a reliable way to detect all the broken cases.
@@ -797,7 +808,7 @@ void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
else if (c->cpuid_level >= 0)
vendor = c->x86_vendor_id;
- if (vendor && strncmp(c->x86_model_id, vendor, strlen(vendor)))
+ if (vendor && !strstr(c->x86_model_id, vendor))
printk(KERN_CONT "%s ", vendor);
if (c->x86_model_id[0])
@@ -1121,16 +1132,5 @@ void __cpuinit cpu_init(void)
xsave_init();
}
-#ifdef CONFIG_HOTPLUG_CPU
-void __cpuinit cpu_uninit(void)
-{
- int cpu = raw_smp_processor_id();
- cpu_clear(cpu, cpu_initialized);
-
- /* lazy TLB state */
- per_cpu(cpu_tlbstate, cpu).state = 0;
- per_cpu(cpu_tlbstate, cpu).active_mm = &init_mm;
-}
-#endif
#endif
diff --git a/arch/x86/kernel/doublefault_32.c b/arch/x86/kernel/doublefault_32.c
index a47798b..b4f14c6 100644
--- a/arch/x86/kernel/doublefault_32.c
+++ b/arch/x86/kernel/doublefault_32.c
@@ -66,6 +66,6 @@ struct tss_struct doublefault_tss __cacheline_aligned = {
.ds = __USER_DS,
.fs = __KERNEL_PERCPU,
- .__cr3 = __pa(swapper_pg_dir)
+ .__cr3 = __pa_nodebug(swapper_pg_dir),
}
};
diff --git a/arch/x86/kernel/dumpstack_32.c b/arch/x86/kernel/dumpstack_32.c
new file mode 100644
index 0000000..c398b27
--- /dev/null
+++ b/arch/x86/kernel/dumpstack_32.c
@@ -0,0 +1,422 @@
+/*
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
+ */
+#include <linux/kallsyms.h>
+#include <linux/kprobes.h>
+#include <linux/uaccess.h>
+#include <linux/utsname.h>
+#include <linux/hardirq.h>
+#include <linux/kdebug.h>
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/kexec.h>
+#include <linux/bug.h>
+#include <linux/nmi.h>
+
+#include <asm/stacktrace.h>
+
+int panic_on_unrecovered_nmi;
+int kstack_depth_to_print = 24;
+static unsigned int code_bytes = 64;
+static int die_counter;
+
+void printk_address(unsigned long address, int reliable)
+{
+#ifdef CONFIG_KALLSYMS
+ unsigned long offset = 0;
+ unsigned long symsize;
+ const char *symname;
+ char *modname;
+ char *delim = ":";
+ char namebuf[KSYM_NAME_LEN];
+ char reliab[4] = "";
+
+ symname = kallsyms_lookup(address, &symsize, &offset,
+ &modname, namebuf);
+ if (!symname) {
+ printk(" [<%08lx>]\n", address);
+ return;
+ }
+ if (!reliable)
+ strcpy(reliab, "? ");
+
+ if (!modname)
+ modname = delim = "";
+ printk(" [<%08lx>] %s%s%s%s%s+0x%lx/0x%lx\n",
+ address, reliab, delim, modname, delim, symname, offset, symsize);
+#else
+ printk(" [<%08lx>]\n", address);
+#endif
+}
+
+static inline int valid_stack_ptr(struct thread_info *tinfo,
+ void *p, unsigned int size)
+{
+ void *t = tinfo;
+ return p > t && p <= t + THREAD_SIZE - size;
+}
+
+/* The form of the top of the frame on the stack */
+struct stack_frame {
+ struct stack_frame *next_frame;
+ unsigned long return_address;
+};
+
+static inline unsigned long
+print_context_stack(struct thread_info *tinfo,
+ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data)
+{
+ struct stack_frame *frame = (struct stack_frame *)bp;
+
+ while (valid_stack_ptr(tinfo, stack, sizeof(*stack))) {
+ unsigned long addr;
+
+ addr = *stack;
+ if (__kernel_text_address(addr)) {
+ if ((unsigned long) stack == bp + 4) {
+ ops->address(data, addr, 1);
+ frame = frame->next_frame;
+ bp = (unsigned long) frame;
+ } else {
+ ops->address(data, addr, bp == 0);
+ }
+ }
+ stack++;
+ }
+ return bp;
+}
+
+void dump_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data)
+{
+ if (!task)
+ task = current;
+
+ if (!stack) {
+ unsigned long dummy;
+ stack = &dummy;
+ if (task != current)
+ stack = (unsigned long *)task->thread.sp;
+ }
+
+#ifdef CONFIG_FRAME_POINTER
+ if (!bp) {
+ if (task == current) {
+ /* Grab bp right from our regs */
+ asm("movl %%ebp, %0" : "=r" (bp) :);
+ } else {
+ /* bp is the last reg pushed by switch_to */
+ bp = *(unsigned long *) task->thread.sp;
+ }
+ }
+#endif
+
+ for (;;) {
+ struct thread_info *context;
+
+ context = (struct thread_info *)
+ ((unsigned long)stack & (~(THREAD_SIZE - 1)));
+ bp = print_context_stack(context, stack, bp, ops, data);
+ /*
+ * Should be after the line below, but somewhere
+ * in early boot context comes out corrupted and we
+ * can't reference it:
+ */
+ if (ops->stack(data, "IRQ") < 0)
+ break;
+ stack = (unsigned long *)context->previous_esp;
+ if (!stack)
+ break;
+ touch_nmi_watchdog();
+ }
+}
+EXPORT_SYMBOL(dump_trace);
+
+static void
+print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
+{
+ printk(data);
+ print_symbol(msg, symbol);
+ printk("\n");
+}
+
+static void print_trace_warning(void *data, char *msg)
+{
+ printk("%s%s\n", (char *)data, msg);
+}
+
+static int print_trace_stack(void *data, char *name)
+{
+ return 0;
+}
+
+/*
+ * Print one address/symbol entries per line.
+ */
+static void print_trace_address(void *data, unsigned long addr, int reliable)
+{
+ printk("%s [<%08lx>] ", (char *)data, addr);
+ if (!reliable)
+ printk("? ");
+ print_symbol("%s\n", addr);
+ touch_nmi_watchdog();
+}
+
+static const struct stacktrace_ops print_trace_ops = {
+ .warning = print_trace_warning,
+ .warning_symbol = print_trace_warning_symbol,
+ .stack = print_trace_stack,
+ .address = print_trace_address,
+};
+
+static void
+show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp, char *log_lvl)
+{
+ dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
+ printk("%s =======================\n", log_lvl);
+}
+
+void show_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp)
+{
+ show_trace_log_lvl(task, regs, stack, bp, "");
+}
+
+static void
+show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *sp, unsigned long bp, char *log_lvl)
+{
+ unsigned long *stack;
+ int i;
+
+ if (sp == NULL) {
+ if (task)
+ sp = (unsigned long *)task->thread.sp;
+ else
+ sp = (unsigned long *)&sp;
+ }
+
+ stack = sp;
+ for (i = 0; i < kstack_depth_to_print; i++) {
+ if (kstack_end(stack))
+ break;
+ if (i && ((i % 8) == 0))
+ printk("\n%s ", log_lvl);
+ printk("%08lx ", *stack++);
+ }
+ printk("\n%sCall Trace:\n", log_lvl);
+
+ show_trace_log_lvl(task, regs, sp, bp, log_lvl);
+}
+
+void show_stack(struct task_struct *task, unsigned long *sp)
+{
+ printk(" ");
+ show_stack_log_lvl(task, NULL, sp, 0, "");
+}
+
+/*
+ * The architecture-independent dump_stack generator
+ */
+void dump_stack(void)
+{
+ unsigned long bp = 0;
+ unsigned long stack;
+
+#ifdef CONFIG_FRAME_POINTER
+ if (!bp)
+ asm("movl %%ebp, %0" : "=r" (bp):);
+#endif
+
+ printk("Pid: %d, comm: %.20s %s %s %.*s\n",
+ current->pid, current->comm, print_tainted(),
+ init_utsname()->release,
+ (int)strcspn(init_utsname()->version, " "),
+ init_utsname()->version);
+
+ show_trace(current, NULL, &stack, bp);
+}
+
+EXPORT_SYMBOL(dump_stack);
+
+void show_registers(struct pt_regs *regs)
+{
+ int i;
+
+ print_modules();
+ __show_regs(regs, 0);
+
+ printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
+ TASK_COMM_LEN, current->comm, task_pid_nr(current),
+ current_thread_info(), current, task_thread_info(current));
+ /*
+ * When in-kernel, we also print out the stack and code at the
+ * time of the fault..
+ */
+ if (!user_mode_vm(regs)) {
+ unsigned int code_prologue = code_bytes * 43 / 64;
+ unsigned int code_len = code_bytes;
+ unsigned char c;
+ u8 *ip;
+
+ printk("\n" KERN_EMERG "Stack: ");
+ show_stack_log_lvl(NULL, regs, ®s->sp, 0, KERN_EMERG);
+
+ printk(KERN_EMERG "Code: ");
+
+ ip = (u8 *)regs->ip - code_prologue;
+ if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
+ /* try starting at EIP */
+ ip = (u8 *)regs->ip;
+ code_len = code_len - code_prologue + 1;
+ }
+ for (i = 0; i < code_len; i++, ip++) {
+ if (ip < (u8 *)PAGE_OFFSET ||
+ probe_kernel_address(ip, c)) {
+ printk(" Bad EIP value.");
+ break;
+ }
+ if (ip == (u8 *)regs->ip)
+ printk("<%02x> ", c);
+ else
+ printk("%02x ", c);
+ }
+ }
+ printk("\n");
+}
+
+int is_valid_bugaddr(unsigned long ip)
+{
+ unsigned short ud2;
+
+ if (ip < PAGE_OFFSET)
+ return 0;
+ if (probe_kernel_address((unsigned short *)ip, ud2))
+ return 0;
+
+ return ud2 == 0x0b0f;
+}
+
+static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
+static int die_owner = -1;
+static unsigned int die_nest_count;
+
+unsigned __kprobes long oops_begin(void)
+{
+ unsigned long flags;
+
+ oops_enter();
+
+ if (die_owner != raw_smp_processor_id()) {
+ console_verbose();
+ raw_local_irq_save(flags);
+ __raw_spin_lock(&die_lock);
+ die_owner = smp_processor_id();
+ die_nest_count = 0;
+ bust_spinlocks(1);
+ } else {
+ raw_local_irq_save(flags);
+ }
+ die_nest_count++;
+ return flags;
+}
+
+void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
+{
+ bust_spinlocks(0);
+ die_owner = -1;
+ add_taint(TAINT_DIE);
+ __raw_spin_unlock(&die_lock);
+ raw_local_irq_restore(flags);
+
+ if (!regs)
+ return;
+
+ if (kexec_should_crash(current))
+ crash_kexec(regs);
+
+ if (in_interrupt())
+ panic("Fatal exception in interrupt");
+
+ if (panic_on_oops)
+ panic("Fatal exception");
+
+ oops_exit();
+ do_exit(signr);
+}
+
+int __kprobes __die(const char *str, struct pt_regs *regs, long err)
+{
+ unsigned short ss;
+ unsigned long sp;
+
+ printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter);
+#ifdef CONFIG_PREEMPT
+ printk("PREEMPT ");
+#endif
+#ifdef CONFIG_SMP
+ printk("SMP ");
+#endif
+#ifdef CONFIG_DEBUG_PAGEALLOC
+ printk("DEBUG_PAGEALLOC");
+#endif
+ printk("\n");
+ if (notify_die(DIE_OOPS, str, regs, err,
+ current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
+ return 1;
+
+ show_registers(regs);
+ /* Executive summary in case the oops scrolled away */
+ sp = (unsigned long) (®s->sp);
+ savesegment(ss, ss);
+ if (user_mode(regs)) {
+ sp = regs->sp;
+ ss = regs->ss & 0xffff;
+ }
+ printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip);
+ print_symbol("%s", regs->ip);
+ printk(" SS:ESP %04x:%08lx\n", ss, sp);
+ return 0;
+}
+
+/*
+ * This is gone through when something in the kernel has done something bad
+ * and is about to be terminated:
+ */
+void die(const char *str, struct pt_regs *regs, long err)
+{
+ unsigned long flags = oops_begin();
+
+ if (die_nest_count < 3) {
+ report_bug(regs->ip, regs);
+
+ if (__die(str, regs, err))
+ regs = NULL;
+ } else {
+ printk(KERN_EMERG "Recursive die() failure, output suppressed\n");
+ }
+
+ oops_end(flags, regs, SIGSEGV);
+}
+
+static int __init kstack_setup(char *s)
+{
+ kstack_depth_to_print = simple_strtoul(s, NULL, 0);
+
+ return 1;
+}
+__setup("kstack=", kstack_setup);
+
+static int __init code_bytes_setup(char *s)
+{
+ code_bytes = simple_strtoul(s, NULL, 0);
+ if (code_bytes > 8192)
+ code_bytes = 8192;
+
+ return 1;
+}
+__setup("code_bytes=", code_bytes_setup);
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
new file mode 100644
index 0000000..6f15050
--- /dev/null
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -0,0 +1,565 @@
+/*
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
+ */
+#include <linux/kallsyms.h>
+#include <linux/kprobes.h>
+#include <linux/uaccess.h>
+#include <linux/utsname.h>
+#include <linux/hardirq.h>
+#include <linux/kdebug.h>
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/kexec.h>
+#include <linux/bug.h>
+#include <linux/nmi.h>
+
+#include <asm/stacktrace.h>
+
+int panic_on_unrecovered_nmi;
+int kstack_depth_to_print = 12;
+static unsigned int code_bytes = 64;
+static int die_counter;
+
+void printk_address(unsigned long address, int reliable)
+{
+ printk(" [<%016lx>] %s%pS\n",
+ address, reliable ? "" : "? ", (void *) address);
+}
+
+static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
+ unsigned *usedp, char **idp)
+{
+ static char ids[][8] = {
+ [DEBUG_STACK - 1] = "#DB",
+ [NMI_STACK - 1] = "NMI",
+ [DOUBLEFAULT_STACK - 1] = "#DF",
+ [STACKFAULT_STACK - 1] = "#SS",
+ [MCE_STACK - 1] = "#MC",
+#if DEBUG_STKSZ > EXCEPTION_STKSZ
+ [N_EXCEPTION_STACKS ...
+ N_EXCEPTION_STACKS + DEBUG_STKSZ / EXCEPTION_STKSZ - 2] = "#DB[?]"
+#endif
+ };
+ unsigned k;
+
+ /*
+ * Iterate over all exception stacks, and figure out whether
+ * 'stack' is in one of them:
+ */
+ for (k = 0; k < N_EXCEPTION_STACKS; k++) {
+ unsigned long end = per_cpu(orig_ist, cpu).ist[k];
+ /*
+ * Is 'stack' above this exception frame's end?
+ * If yes then skip to the next frame.
+ */
+ if (stack >= end)
+ continue;
+ /*
+ * Is 'stack' above this exception frame's start address?
+ * If yes then we found the right frame.
+ */
+ if (stack >= end - EXCEPTION_STKSZ) {
+ /*
+ * Make sure we only iterate through an exception
+ * stack once. If it comes up for the second time
+ * then there's something wrong going on - just
+ * break out and return NULL:
+ */
+ if (*usedp & (1U << k))
+ break;
+ *usedp |= 1U << k;
+ *idp = ids[k];
+ return (unsigned long *)end;
+ }
+ /*
+ * If this is a debug stack, and if it has a larger size than
+ * the usual exception stacks, then 'stack' might still
+ * be within the lower portion of the debug stack:
+ */
+#if DEBUG_STKSZ > EXCEPTION_STKSZ
+ if (k == DEBUG_STACK - 1 && stack >= end - DEBUG_STKSZ) {
+ unsigned j = N_EXCEPTION_STACKS - 1;
+
+ /*
+ * Black magic. A large debug stack is composed of
+ * multiple exception stack entries, which we
+ * iterate through now. Dont look:
+ */
+ do {
+ ++j;
+ end -= EXCEPTION_STKSZ;
+ ids[j][4] = '1' + (j - N_EXCEPTION_STACKS);
+ } while (stack < end - EXCEPTION_STKSZ);
+ if (*usedp & (1U << j))
+ break;
+ *usedp |= 1U << j;
+ *idp = ids[j];
+ return (unsigned long *)end;
+ }
+#endif
+ }
+ return NULL;
+}
+
+/*
+ * x86-64 can have up to three kernel stacks:
+ * process stack
+ * interrupt stack
+ * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
+ */
+
+static inline int valid_stack_ptr(struct thread_info *tinfo,
+ void *p, unsigned int size, void *end)
+{
+ void *t = tinfo;
+ if (end) {
+ if (p < end && p >= (end-THREAD_SIZE))
+ return 1;
+ else
+ return 0;
+ }
+ return p > t && p < t + THREAD_SIZE - size;
+}
+
+/* The form of the top of the frame on the stack */
+struct stack_frame {
+ struct stack_frame *next_frame;
+ unsigned long return_address;
+};
+
+static inline unsigned long
+print_context_stack(struct thread_info *tinfo,
+ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data,
+ unsigned long *end)
+{
+ struct stack_frame *frame = (struct stack_frame *)bp;
+
+ while (valid_stack_ptr(tinfo, stack, sizeof(*stack), end)) {
+ unsigned long addr;
+
+ addr = *stack;
+ if (__kernel_text_address(addr)) {
+ if ((unsigned long) stack == bp + 8) {
+ ops->address(data, addr, 1);
+ frame = frame->next_frame;
+ bp = (unsigned long) frame;
+ } else {
+ ops->address(data, addr, bp == 0);
+ }
+ }
+ stack++;
+ }
+ return bp;
+}
+
+void dump_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data)
+{
+ const unsigned cpu = get_cpu();
+ unsigned long *irqstack_end = (unsigned long *)cpu_pda(cpu)->irqstackptr;
+ unsigned used = 0;
+ struct thread_info *tinfo;
+
+ if (!task)
+ task = current;
+
+ if (!stack) {
+ unsigned long dummy;
+ stack = &dummy;
+ if (task && task != current)
+ stack = (unsigned long *)task->thread.sp;
+ }
+
+#ifdef CONFIG_FRAME_POINTER
+ if (!bp) {
+ if (task == current) {
+ /* Grab bp right from our regs */
+ asm("movq %%rbp, %0" : "=r" (bp) : );
+ } else {
+ /* bp is the last reg pushed by switch_to */
+ bp = *(unsigned long *) task->thread.sp;
+ }
+ }
+#endif
+
+ /*
+ * Print function call entries in all stacks, starting at the
+ * current stack address. If the stacks consist of nested
+ * exceptions
+ */
+ tinfo = task_thread_info(task);
+ for (;;) {
+ char *id;
+ unsigned long *estack_end;
+ estack_end = in_exception_stack(cpu, (unsigned long)stack,
+ &used, &id);
+
+ if (estack_end) {
+ if (ops->stack(data, id) < 0)
+ break;
+
+ bp = print_context_stack(tinfo, stack, bp, ops,
+ data, estack_end);
+ ops->stack(data, "<EOE>");
+ /*
+ * We link to the next stack via the
+ * second-to-last pointer (index -2 to end) in the
+ * exception stack:
+ */
+ stack = (unsigned long *) estack_end[-2];
+ continue;
+ }
+ if (irqstack_end) {
+ unsigned long *irqstack;
+ irqstack = irqstack_end -
+ (IRQSTACKSIZE - 64) / sizeof(*irqstack);
+
+ if (stack >= irqstack && stack < irqstack_end) {
+ if (ops->stack(data, "IRQ") < 0)
+ break;
+ bp = print_context_stack(tinfo, stack, bp,
+ ops, data, irqstack_end);
+ /*
+ * We link to the next stack (which would be
+ * the process stack normally) the last
+ * pointer (index -1 to end) in the IRQ stack:
+ */
+ stack = (unsigned long *) (irqstack_end[-1]);
+ irqstack_end = NULL;
+ ops->stack(data, "EOI");
+ continue;
+ }
+ }
+ break;
+ }
+
+ /*
+ * This handles the process stack:
+ */
+ bp = print_context_stack(tinfo, stack, bp, ops, data, NULL);
+ put_cpu();
+}
+EXPORT_SYMBOL(dump_trace);
+
+static void
+print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
+{
+ print_symbol(msg, symbol);
+ printk("\n");
+}
+
+static void print_trace_warning(void *data, char *msg)
+{
+ printk("%s\n", msg);
+}
+
+static int print_trace_stack(void *data, char *name)
+{
+ printk(" <%s> ", name);
+ return 0;
+}
+
+static void print_trace_address(void *data, unsigned long addr, int reliable)
+{
+ touch_nmi_watchdog();
+ printk_address(addr, reliable);
+}
+
+static const struct stacktrace_ops print_trace_ops = {
+ .warning = print_trace_warning,
+ .warning_symbol = print_trace_warning_symbol,
+ .stack = print_trace_stack,
+ .address = print_trace_address,
+};
+
+static void
+show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp, char *log_lvl)
+{
+ printk("Call Trace:\n");
+ dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
+}
+
+void show_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp)
+{
+ show_trace_log_lvl(task, regs, stack, bp, "");
+}
+
+static void
+show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *sp, unsigned long bp, char *log_lvl)
+{
+ unsigned long *stack;
+ int i;
+ const int cpu = smp_processor_id();
+ unsigned long *irqstack_end =
+ (unsigned long *) (cpu_pda(cpu)->irqstackptr);
+ unsigned long *irqstack =
+ (unsigned long *) (cpu_pda(cpu)->irqstackptr - IRQSTACKSIZE);
+
+ /*
+ * debugging aid: "show_stack(NULL, NULL);" prints the
+ * back trace for this cpu.
+ */
+
+ if (sp == NULL) {
+ if (task)
+ sp = (unsigned long *)task->thread.sp;
+ else
+ sp = (unsigned long *)&sp;
+ }
+
+ stack = sp;
+ for (i = 0; i < kstack_depth_to_print; i++) {
+ if (stack >= irqstack && stack <= irqstack_end) {
+ if (stack == irqstack_end) {
+ stack = (unsigned long *) (irqstack_end[-1]);
+ printk(" <EOI> ");
+ }
+ } else {
+ if (((long) stack & (THREAD_SIZE-1)) == 0)
+ break;
+ }
+ if (i && ((i % 4) == 0))
+ printk("\n");
+ printk(" %016lx", *stack++);
+ touch_nmi_watchdog();
+ }
+ printk("\n");
+ show_trace_log_lvl(task, regs, sp, bp, log_lvl);
+}
+
+void show_stack(struct task_struct *task, unsigned long *sp)
+{
+ show_stack_log_lvl(task, NULL, sp, 0, "");
+}
+
+/*
+ * The architecture-independent dump_stack generator
+ */
+void dump_stack(void)
+{
+ unsigned long bp = 0;
+ unsigned long stack;
+
+#ifdef CONFIG_FRAME_POINTER
+ if (!bp)
+ asm("movq %%rbp, %0" : "=r" (bp) : );
+#endif
+
+ printk("Pid: %d, comm: %.20s %s %s %.*s\n",
+ current->pid, current->comm, print_tainted(),
+ init_utsname()->release,
+ (int)strcspn(init_utsname()->version, " "),
+ init_utsname()->version);
+ show_trace(NULL, NULL, &stack, bp);
+}
+EXPORT_SYMBOL(dump_stack);
+
+void show_registers(struct pt_regs *regs)
+{
+ int i;
+ unsigned long sp;
+ const int cpu = smp_processor_id();
+ struct task_struct *cur = cpu_pda(cpu)->pcurrent;
+
+ sp = regs->sp;
+ printk("CPU %d ", cpu);
+ __show_regs(regs, 1);
+ printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
+ cur->comm, cur->pid, task_thread_info(cur), cur);
+
+ /*
+ * When in-kernel, we also print out the stack and code at the
+ * time of the fault..
+ */
+ if (!user_mode(regs)) {
+ unsigned int code_prologue = code_bytes * 43 / 64;
+ unsigned int code_len = code_bytes;
+ unsigned char c;
+ u8 *ip;
+
+ printk("Stack: ");
+ show_stack_log_lvl(NULL, regs, (unsigned long *)sp,
+ regs->bp, "");
+
+ printk(KERN_EMERG "Code: ");
+
+ ip = (u8 *)regs->ip - code_prologue;
+ if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
+ /* try starting at RIP */
+ ip = (u8 *)regs->ip;
+ code_len = code_len - code_prologue + 1;
+ }
+ for (i = 0; i < code_len; i++, ip++) {
+ if (ip < (u8 *)PAGE_OFFSET ||
+ probe_kernel_address(ip, c)) {
+ printk(" Bad RIP value.");
+ break;
+ }
+ if (ip == (u8 *)regs->ip)
+ printk("<%02x> ", c);
+ else
+ printk("%02x ", c);
+ }
+ }
+ printk("\n");
+}
+
+int is_valid_bugaddr(unsigned long ip)
+{
+ unsigned short ud2;
+
+ if (__copy_from_user(&ud2, (const void __user *) ip, sizeof(ud2)))
+ return 0;
+
+ return ud2 == 0x0b0f;
+}
+
+static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
+static int die_owner = -1;
+static unsigned int die_nest_count;
+
+unsigned __kprobes long oops_begin(void)
+{
+ int cpu;
+ unsigned long flags;
+
+ oops_enter();
+
+ /* racy, but better than risking deadlock. */
+ raw_local_irq_save(flags);
+ cpu = smp_processor_id();
+ if (!__raw_spin_trylock(&die_lock)) {
+ if (cpu == die_owner)
+ /* nested oops. should stop eventually */;
+ else
+ __raw_spin_lock(&die_lock);
+ }
+ die_nest_count++;
+ die_owner = cpu;
+ console_verbose();
+ bust_spinlocks(1);
+ return flags;
+}
+
+void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
+{
+ die_owner = -1;
+ bust_spinlocks(0);
+ die_nest_count--;
+ if (!die_nest_count)
+ /* Nest count reaches zero, release the lock. */
+ __raw_spin_unlock(&die_lock);
+ raw_local_irq_restore(flags);
+ if (!regs) {
+ oops_exit();
+ return;
+ }
+ if (in_interrupt())
+ panic("Fatal exception in interrupt");
+ if (panic_on_oops)
+ panic("Fatal exception");
+ oops_exit();
+ do_exit(signr);
+}
+
+int __kprobes __die(const char *str, struct pt_regs *regs, long err)
+{
+ printk(KERN_EMERG "%s: %04lx [%u] ", str, err & 0xffff, ++die_counter);
+#ifdef CONFIG_PREEMPT
+ printk("PREEMPT ");
+#endif
+#ifdef CONFIG_SMP
+ printk("SMP ");
+#endif
+#ifdef CONFIG_DEBUG_PAGEALLOC
+ printk("DEBUG_PAGEALLOC");
+#endif
+ printk("\n");
+ if (notify_die(DIE_OOPS, str, regs, err,
+ current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
+ return 1;
+
+ show_registers(regs);
+ add_taint(TAINT_DIE);
+ /* Executive summary in case the oops scrolled away */
+ printk(KERN_ALERT "RIP ");
+ printk_address(regs->ip, 1);
+ printk(" RSP <%016lx>\n", regs->sp);
+ if (kexec_should_crash(current))
+ crash_kexec(regs);
+ return 0;
+}
+
+void die(const char *str, struct pt_regs *regs, long err)
+{
+ unsigned long flags = oops_begin();
+
+ if (!user_mode(regs))
+ report_bug(regs->ip, regs);
+
+ if (__die(str, regs, err))
+ regs = NULL;
+ oops_end(flags, regs, SIGSEGV);
+}
+
+notrace __kprobes void
+die_nmi(char *str, struct pt_regs *regs, int do_panic)
+{
+ unsigned long flags;
+
+ if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
+ return;
+
+ flags = oops_begin();
+ /*
+ * We are in trouble anyway, lets at least try
+ * to get a message out.
+ */
+ printk(KERN_EMERG "%s", str);
+ printk(" on CPU%d, ip %08lx, registers:\n",
+ smp_processor_id(), regs->ip);
+ show_registers(regs);
+ if (kexec_should_crash(current))
+ crash_kexec(regs);
+ if (do_panic || panic_on_oops)
+ panic("Non maskable interrupt");
+ oops_end(flags, NULL, SIGBUS);
+ nmi_exit();
+ local_irq_enable();
+ do_exit(SIGBUS);
+}
+
+static int __init oops_setup(char *s)
+{
+ if (!s)
+ return -EINVAL;
+ if (!strcmp(s, "panic"))
+ panic_on_oops = 1;
+ return 0;
+}
+early_param("oops", oops_setup);
+
+static int __init kstack_setup(char *s)
+{
+ if (!s)
+ return -EINVAL;
+ kstack_depth_to_print = simple_strtoul(s, NULL, 0);
+ return 0;
+}
+early_param("kstack", kstack_setup);
+
+static int __init code_bytes_setup(char *s)
+{
+ code_bytes = simple_strtoul(s, NULL, 0);
+ if (code_bytes > 8192)
+ code_bytes = 8192;
+
+ return 1;
+}
+__setup("code_bytes=", code_bytes_setup);
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 109792b..b21fbfa 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -730,6 +730,7 @@ error_code:
movl $(__USER_DS), %ecx
movl %ecx, %ds
movl %ecx, %es
+ TRACE_IRQS_OFF
movl %esp,%eax # pt_regs pointer
call *%edi
jmp ret_from_exception
@@ -760,20 +761,9 @@ ENTRY(device_not_available)
RING0_INT_FRAME
pushl $-1 # mark this as an int
CFI_ADJUST_CFA_OFFSET 4
- SAVE_ALL
- GET_CR0_INTO_EAX
- testl $0x4, %eax # EM (math emulation bit)
- jne device_not_available_emulate
- preempt_stop(CLBR_ANY)
- call math_state_restore
- jmp ret_from_exception
-device_not_available_emulate:
- pushl $0 # temporary storage for ORIG_EIP
+ pushl $do_device_not_available
CFI_ADJUST_CFA_OFFSET 4
- call math_emulate
- addl $4, %esp
- CFI_ADJUST_CFA_OFFSET -4
- jmp ret_from_exception
+ jmp error_code
CFI_ENDPROC
END(device_not_available)
@@ -814,6 +804,7 @@ debug_stack_correct:
pushl $-1 # mark this as an int
CFI_ADJUST_CFA_OFFSET 4
SAVE_ALL
+ TRACE_IRQS_OFF
xorl %edx,%edx # error code 0
movl %esp,%eax # pt_regs pointer
call do_debug
@@ -858,6 +849,7 @@ nmi_stack_correct:
pushl %eax
CFI_ADJUST_CFA_OFFSET 4
SAVE_ALL
+ TRACE_IRQS_OFF
xorl %edx,%edx # zero error code
movl %esp,%eax # pt_regs pointer
call do_nmi
@@ -898,6 +890,7 @@ nmi_espfix_stack:
pushl %eax
CFI_ADJUST_CFA_OFFSET 4
SAVE_ALL
+ TRACE_IRQS_OFF
FIXUP_ESPFIX_STACK # %eax == %esp
xorl %edx,%edx # zero error code
call do_nmi
@@ -928,6 +921,7 @@ KPROBE_ENTRY(int3)
pushl $-1 # mark this as an int
CFI_ADJUST_CFA_OFFSET 4
SAVE_ALL
+ TRACE_IRQS_OFF
xorl %edx,%edx # zero error code
movl %esp,%eax # pt_regs pointer
call do_int3
@@ -1030,7 +1024,7 @@ ENTRY(machine_check)
RING0_INT_FRAME
pushl $0
CFI_ADJUST_CFA_OFFSET 4
- pushl machine_check_vector
+ pushl $do_machine_check
CFI_ADJUST_CFA_OFFSET 4
jmp error_code
CFI_ENDPROC
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index cf3a0b2..104fa65 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -932,6 +932,9 @@ END(spurious_interrupt)
.if \ist
movq %gs:pda_data_offset, %rbp
.endif
+ .if \irqtrace
+ TRACE_IRQS_OFF
+ .endif
movq %rsp,%rdi
movq ORIG_RAX(%rsp),%rsi
movq $-1,ORIG_RAX(%rsp)
@@ -1058,7 +1061,8 @@ KPROBE_ENTRY(error_entry)
je error_kernelspace
error_swapgs:
SWAPGS
-error_sti:
+error_sti:
+ TRACE_IRQS_OFF
movq %rdi,RDI(%rsp)
CFI_REL_OFFSET rdi,RDI
movq %rsp,%rdi
@@ -1232,7 +1236,7 @@ ENTRY(simd_coprocessor_error)
END(simd_coprocessor_error)
ENTRY(device_not_available)
- zeroentry math_state_restore
+ zeroentry do_device_not_available
END(device_not_available)
/* runs on exception stack */
diff --git a/arch/x86/kernel/es7000_32.c b/arch/x86/kernel/es7000_32.c
index 849e5cd..f454c78 100644
--- a/arch/x86/kernel/es7000_32.c
+++ b/arch/x86/kernel/es7000_32.c
@@ -109,6 +109,7 @@ struct oem_table {
};
extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
+extern void unmap_unisys_acpi_oem_table(unsigned long oem_addr);
#endif
struct mip_reg {
@@ -243,21 +244,38 @@ parse_unisys_oem (char *oemptr)
}
#ifdef CONFIG_ACPI
-int __init
-find_unisys_acpi_oem_table(unsigned long *oem_addr)
+static unsigned long oem_addrX;
+static unsigned long oem_size;
+int __init find_unisys_acpi_oem_table(unsigned long *oem_addr)
{
struct acpi_table_header *header = NULL;
int i = 0;
- while (ACPI_SUCCESS(acpi_get_table("OEM1", i++, &header))) {
+ acpi_size tbl_size;
+
+ while (ACPI_SUCCESS(acpi_get_table_with_size("OEM1", i++, &header, &tbl_size))) {
if (!memcmp((char *) &header->oem_id, "UNISYS", 6)) {
struct oem_table *t = (struct oem_table *)header;
- *oem_addr = (unsigned long)__acpi_map_table(t->OEMTableAddr,
- t->OEMTableSize);
+
+ oem_addrX = t->OEMTableAddr;
+ oem_size = t->OEMTableSize;
+ early_acpi_os_unmap_memory(header, tbl_size);
+
+ *oem_addr = (unsigned long)__acpi_map_table(oem_addrX,
+ oem_size);
return 0;
}
+ early_acpi_os_unmap_memory(header, tbl_size);
}
return -1;
}
+
+void __init unmap_unisys_acpi_oem_table(unsigned long oem_addr)
+{
+ if (!oem_addr)
+ return;
+
+ __acpi_unmap_table((char *)oem_addr, oem_size);
+}
#endif
static void
diff --git a/arch/x86/kernel/genx2apic_uv_x.c b/arch/x86/kernel/genx2apic_uv_x.c
index ae2ffc8..7b0ff40 100644
--- a/arch/x86/kernel/genx2apic_uv_x.c
+++ b/arch/x86/kernel/genx2apic_uv_x.c
@@ -114,7 +114,7 @@ static void uv_send_IPI_one(int cpu, int vector)
unsigned long val, apicid, lapicid;
int pnode;
- apicid = per_cpu(x86_cpu_to_apicid, cpu); /* ZZZ - cache node-local ? */
+ apicid = per_cpu(x86_cpu_to_apicid, cpu);
lapicid = apicid & 0x3f; /* ZZZ macro needed */
pnode = uv_apicid_to_pnode(apicid);
val =
@@ -202,12 +202,10 @@ static unsigned int phys_pkg_id(int index_msb)
return uv_read_apic_id() >> index_msb;
}
-#ifdef ZZZ /* Needs x2apic patch */
static void uv_send_IPI_self(int vector)
{
apic_write(APIC_SELF_IPI, vector);
}
-#endif
struct genapic apic_x2apic_uv_x = {
.name = "UV large system",
@@ -215,15 +213,15 @@ struct genapic apic_x2apic_uv_x = {
.int_delivery_mode = dest_Fixed,
.int_dest_mode = (APIC_DEST_PHYSICAL != 0),
.target_cpus = uv_target_cpus,
- .vector_allocation_domain = uv_vector_allocation_domain,/* Fixme ZZZ */
+ .vector_allocation_domain = uv_vector_allocation_domain,
.apic_id_registered = uv_apic_id_registered,
.init_apic_ldr = uv_init_apic_ldr,
.send_IPI_all = uv_send_IPI_all,
.send_IPI_allbutself = uv_send_IPI_allbutself,
.send_IPI_mask = uv_send_IPI_mask,
- /* ZZZ.send_IPI_self = uv_send_IPI_self, */
+ .send_IPI_self = uv_send_IPI_self,
.cpu_mask_to_apicid = uv_cpu_mask_to_apicid,
- .phys_pkg_id = phys_pkg_id, /* Fixme ZZZ */
+ .phys_pkg_id = phys_pkg_id,
.get_apic_id = get_apic_id,
.set_apic_id = set_apic_id,
.apic_id_mask = (0xFFFFFFFFu),
diff --git a/arch/x86/kernel/head.c b/arch/x86/kernel/head.c
index 3e66bd3..1dcb0f1 100644
--- a/arch/x86/kernel/head.c
+++ b/arch/x86/kernel/head.c
@@ -35,6 +35,7 @@ void __init reserve_ebda_region(void)
/* start of EBDA area */
ebda_addr = get_bios_ebda();
+ printk(KERN_INFO "BIOS EBDA/lowmem at: %08x/%08x\n", ebda_addr, lowmem);
/* Fixup: bios puts an EBDA in the top 64K segment */
/* of conventional memory, but does not adjust lowmem. */
diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 0ed5f93..eee32b4 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -52,6 +52,8 @@ static int alloc_ldt(mm_context_t *pc, int mincount, int reload)
memset(newldt + oldsize * LDT_ENTRY_SIZE, 0,
(mincount - oldsize) * LDT_ENTRY_SIZE);
+ paravirt_alloc_ldt(newldt, mincount);
+
#ifdef CONFIG_X86_64
/* CHECKME: Do we really need this ? */
wmb();
@@ -74,6 +76,7 @@ static int alloc_ldt(mm_context_t *pc, int mincount, int reload)
#endif
}
if (oldsize) {
+ paravirt_free_ldt(oldldt, oldsize);
if (oldsize * LDT_ENTRY_SIZE > PAGE_SIZE)
vfree(oldldt);
else
@@ -85,10 +88,13 @@ static int alloc_ldt(mm_context_t *pc, int mincount, int reload)
static inline int copy_ldt(mm_context_t *new, mm_context_t *old)
{
int err = alloc_ldt(new, old->size, 0);
+ int i;
if (err < 0)
return err;
- memcpy(new->ldt, old->ldt, old->size * LDT_ENTRY_SIZE);
+
+ for(i = 0; i < old->size; i++)
+ write_ldt_entry(new->ldt, i, old->ldt + i * LDT_ENTRY_SIZE);
return 0;
}
@@ -125,6 +131,7 @@ void destroy_context(struct mm_struct *mm)
if (mm == current->active_mm)
clear_LDT();
#endif
+ paravirt_free_ldt(mm->context.ldt, mm->context.size);
if (mm->context.size * LDT_ENTRY_SIZE > PAGE_SIZE)
vfree(mm->context.ldt);
else
diff --git a/arch/x86/kernel/paravirt-spinlocks.c b/arch/x86/kernel/paravirt-spinlocks.c
new file mode 100644
index 0000000..0e9f198
--- /dev/null
+++ b/arch/x86/kernel/paravirt-spinlocks.c
@@ -0,0 +1,37 @@
+/*
+ * Split spinlock implementation out into its own file, so it can be
+ * compiled in a FTRACE-compatible way.
+ */
+#include <linux/spinlock.h>
+#include <linux/module.h>
+
+#include <asm/paravirt.h>
+
+static void default_spin_lock_flags(struct raw_spinlock *lock, unsigned long flags)
+{
+ __raw_spin_lock(lock);
+}
+
+struct pv_lock_ops pv_lock_ops = {
+#ifdef CONFIG_SMP
+ .spin_is_locked = __ticket_spin_is_locked,
+ .spin_is_contended = __ticket_spin_is_contended,
+
+ .spin_lock = __ticket_spin_lock,
+ .spin_lock_flags = default_spin_lock_flags,
+ .spin_trylock = __ticket_spin_trylock,
+ .spin_unlock = __ticket_spin_unlock,
+#endif
+};
+EXPORT_SYMBOL(pv_lock_ops);
+
+void __init paravirt_use_bytelocks(void)
+{
+#ifdef CONFIG_SMP
+ pv_lock_ops.spin_is_locked = __byte_spin_is_locked;
+ pv_lock_ops.spin_is_contended = __byte_spin_is_contended;
+ pv_lock_ops.spin_lock = __byte_spin_lock;
+ pv_lock_ops.spin_trylock = __byte_spin_trylock;
+ pv_lock_ops.spin_unlock = __byte_spin_unlock;
+#endif
+}
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 6b0bb73..e4c8fb6 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -268,17 +268,6 @@ enum paravirt_lazy_mode paravirt_get_lazy_mode(void)
return __get_cpu_var(paravirt_lazy_mode);
}
-void __init paravirt_use_bytelocks(void)
-{
-#ifdef CONFIG_SMP
- pv_lock_ops.spin_is_locked = __byte_spin_is_locked;
- pv_lock_ops.spin_is_contended = __byte_spin_is_contended;
- pv_lock_ops.spin_lock = __byte_spin_lock;
- pv_lock_ops.spin_trylock = __byte_spin_trylock;
- pv_lock_ops.spin_unlock = __byte_spin_unlock;
-#endif
-}
-
struct pv_info pv_info = {
.name = "bare hardware",
.paravirt_enabled = 0,
@@ -349,6 +338,10 @@ struct pv_cpu_ops pv_cpu_ops = {
.write_ldt_entry = native_write_ldt_entry,
.write_gdt_entry = native_write_gdt_entry,
.write_idt_entry = native_write_idt_entry,
+
+ .alloc_ldt = paravirt_nop,
+ .free_ldt = paravirt_nop,
+
.load_sp0 = native_load_sp0,
#if defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION)
@@ -460,18 +453,6 @@ struct pv_mmu_ops pv_mmu_ops = {
.set_fixmap = native_set_fixmap,
};
-struct pv_lock_ops pv_lock_ops = {
-#ifdef CONFIG_SMP
- .spin_is_locked = __ticket_spin_is_locked,
- .spin_is_contended = __ticket_spin_is_contended,
-
- .spin_lock = __ticket_spin_lock,
- .spin_trylock = __ticket_spin_trylock,
- .spin_unlock = __ticket_spin_unlock,
-#endif
-};
-EXPORT_SYMBOL(pv_lock_ops);
-
EXPORT_SYMBOL_GPL(pv_time_ops);
EXPORT_SYMBOL (pv_cpu_ops);
EXPORT_SYMBOL (pv_mmu_ops);
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 205188d..0a1302f 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -76,47 +76,12 @@ unsigned long thread_saved_pc(struct task_struct *tsk)
return ((unsigned long *)tsk->thread.sp)[3];
}
-#ifdef CONFIG_HOTPLUG_CPU
-#include <asm/nmi.h>
-
-static void cpu_exit_clear(void)
-{
- int cpu = raw_smp_processor_id();
-
- idle_task_exit();
-
- cpu_uninit();
- irq_ctx_exit(cpu);
-
- cpu_clear(cpu, cpu_callout_map);
- cpu_clear(cpu, cpu_callin_map);
-
- numa_remove_cpu(cpu);
- c1e_remove_cpu(cpu);
-}
-
-/* We don't actually take CPU down, just spin without interrupts. */
-static inline void play_dead(void)
-{
- /* This must be done before dead CPU ack */
- cpu_exit_clear();
- mb();
- /* Ack it */
- __get_cpu_var(cpu_state) = CPU_DEAD;
-
- /*
- * With physical CPU hotplug, we should halt the cpu
- */
- local_irq_disable();
- /* mask all interrupts, flush any and all caches, and halt */
- wbinvd_halt();
-}
-#else
+#ifndef CONFIG_SMP
static inline void play_dead(void)
{
BUG();
}
-#endif /* CONFIG_HOTPLUG_CPU */
+#endif
/*
* The idle thread. There's no useful work to be
@@ -158,7 +123,7 @@ void cpu_idle(void)
}
}
-void __show_registers(struct pt_regs *regs, int all)
+void __show_regs(struct pt_regs *regs, int all)
{
unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;
unsigned long d0, d1, d2, d3, d6, d7;
@@ -224,7 +189,7 @@ void __show_registers(struct pt_regs *regs, int all)
void show_regs(struct pt_regs *regs)
{
- __show_registers(regs, 1);
+ __show_regs(regs, 1);
show_trace(NULL, regs, ®s->sp, regs->bp);
}
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 2a8ccb9..410cc5f 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -86,30 +86,12 @@ void exit_idle(void)
__exit_idle();
}
-#ifdef CONFIG_HOTPLUG_CPU
-DECLARE_PER_CPU(int, cpu_state);
-
-#include <linux/nmi.h>
-/* We halt the CPU with physical CPU hotplug */
-static inline void play_dead(void)
-{
- idle_task_exit();
- c1e_remove_cpu(raw_smp_processor_id());
-
- mb();
- /* Ack it */
- __get_cpu_var(cpu_state) = CPU_DEAD;
-
- local_irq_disable();
- /* mask all interrupts, flush any and all caches, and halt */
- wbinvd_halt();
-}
-#else
+#ifndef CONFIG_SMP
static inline void play_dead(void)
{
BUG();
}
-#endif /* CONFIG_HOTPLUG_CPU */
+#endif
/*
* The idle thread. There's no useful work to be
@@ -154,7 +136,7 @@ void cpu_idle(void)
}
/* Prints also some state that isn't saved in the pt_regs */
-void __show_regs(struct pt_regs *regs)
+void __show_regs(struct pt_regs *regs, int all)
{
unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L, fs, gs, shadowgs;
unsigned long d0, d1, d2, d3, d6, d7;
@@ -193,13 +175,20 @@ void __show_regs(struct pt_regs *regs)
rdmsrl(MSR_GS_BASE, gs);
rdmsrl(MSR_KERNEL_GS_BASE, shadowgs);
+ if (!all)
+ return;
+
+ printk(KERN_INFO "FS: %016lx(%04x) GS:%016lx(%04x) knlGS:%016lx\n",
+ fs, fsindex, gs, gsindex, shadowgs);
+
+ if (!all)
+ return;
+
cr0 = read_cr0();
cr2 = read_cr2();
cr3 = read_cr3();
cr4 = read_cr4();
- printk(KERN_INFO "FS: %016lx(%04x) GS:%016lx(%04x) knlGS:%016lx\n",
- fs, fsindex, gs, gsindex, shadowgs);
printk(KERN_INFO "CS: %04x DS: %04x ES: %04x CR0: %016lx\n", cs, ds,
es, cr0);
printk(KERN_INFO "CR2: %016lx CR3: %016lx CR4: %016lx\n", cr2, cr3,
@@ -218,7 +207,7 @@ void __show_regs(struct pt_regs *regs)
void show_regs(struct pt_regs *regs)
{
printk(KERN_INFO "CPU %d:", smp_processor_id());
- __show_regs(regs);
+ __show_regs(regs, 1);
show_trace(NULL, regs, (void *)(regs + 1), regs->bp);
}
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 46c98ef..09ee73a 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -302,7 +302,7 @@ static void __init relocate_initrd(void)
if (clen > MAX_MAP_CHUNK-slop)
clen = MAX_MAP_CHUNK-slop;
mapaddr = ramdisk_image & PAGE_MASK;
- p = early_ioremap(mapaddr, clen+slop);
+ p = early_memremap(mapaddr, clen+slop);
memcpy(q, p+slop, clen);
early_iounmap(p, clen+slop);
q += clen;
@@ -379,7 +379,7 @@ static void __init parse_setup_data(void)
return;
pa_data = boot_params.hdr.setup_data;
while (pa_data) {
- data = early_ioremap(pa_data, PAGE_SIZE);
+ data = early_memremap(pa_data, PAGE_SIZE);
switch (data->type) {
case SETUP_E820_EXT:
parse_e820_ext(data, pa_data);
@@ -402,7 +402,7 @@ static void __init e820_reserve_setup_data(void)
return;
pa_data = boot_params.hdr.setup_data;
while (pa_data) {
- data = early_ioremap(pa_data, sizeof(*data));
+ data = early_memremap(pa_data, sizeof(*data));
e820_update_range(pa_data, sizeof(*data)+data->len,
E820_RAM, E820_RESERVED_KERN);
found = 1;
@@ -428,7 +428,7 @@ static void __init reserve_early_setup_data(void)
return;
pa_data = boot_params.hdr.setup_data;
while (pa_data) {
- data = early_ioremap(pa_data, sizeof(*data));
+ data = early_memremap(pa_data, sizeof(*data));
sprintf(buf, "setup data %x", data->type);
reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
pa_data = data->next;
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index 361b7a4..18f9b19 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -214,12 +214,16 @@ void smp_call_function_single_interrupt(struct pt_regs *regs)
struct smp_ops smp_ops = {
.smp_prepare_boot_cpu = native_smp_prepare_boot_cpu,
.smp_prepare_cpus = native_smp_prepare_cpus,
- .cpu_up = native_cpu_up,
.smp_cpus_done = native_smp_cpus_done,
.smp_send_stop = native_smp_send_stop,
.smp_send_reschedule = native_smp_send_reschedule,
+ .cpu_up = native_cpu_up,
+ .cpu_die = native_cpu_die,
+ .cpu_disable = native_cpu_disable,
+ .play_dead = native_play_dead,
+
.send_call_func_ipi = native_send_call_func_ipi,
.send_call_func_single_ipi = native_send_call_func_single_ipi,
};
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 2ff0bbc..d6a4d95 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -52,6 +52,7 @@
#include <asm/desc.h>
#include <asm/nmi.h>
#include <asm/irq.h>
+#include <asm/idle.h>
#include <asm/smp.h>
#include <asm/trampoline.h>
#include <asm/cpu.h>
@@ -332,14 +333,17 @@ static void __cpuinit start_secondary(void *unused)
* does not change while we are assigning vectors to cpus. Holding
* this lock ensures we don't half assign or remove an irq from a cpu.
*/
- ipi_call_lock_irq();
+ ipi_call_lock();
lock_vector_lock();
__setup_vector_irq(smp_processor_id());
cpu_set(smp_processor_id(), cpu_online_map);
unlock_vector_lock();
- ipi_call_unlock_irq();
+ ipi_call_unlock();
per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
+ /* enable local interrupts */
+ local_irq_enable();
+
setup_secondary_clock();
wmb();
@@ -594,10 +598,12 @@ wakeup_secondary_cpu(int logical_apicid, unsigned long start_eip)
* Give the other CPU some time to accept the IPI.
*/
udelay(200);
- maxlvt = lapic_get_maxlvt();
- if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */
- apic_write(APIC_ESR, 0);
- accept_status = (apic_read(APIC_ESR) & 0xEF);
+ if (APIC_INTEGRATED(apic_version[phys_apicid])) {
+ maxlvt = lapic_get_maxlvt();
+ if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */
+ apic_write(APIC_ESR, 0);
+ accept_status = (apic_read(APIC_ESR) & 0xEF);
+ }
pr_debug("NMI sent.\n");
if (send_status)
@@ -1254,39 +1260,6 @@ void __init native_smp_cpus_done(unsigned int max_cpus)
check_nmi_watchdog();
}
-#ifdef CONFIG_HOTPLUG_CPU
-
-static void remove_siblinginfo(int cpu)
-{
- int sibling;
- struct cpuinfo_x86 *c = &cpu_data(cpu);
-
- for_each_cpu_mask_nr(sibling, per_cpu(cpu_core_map, cpu)) {
- cpu_clear(cpu, per_cpu(cpu_core_map, sibling));
- /*/
- * last thread sibling in this cpu core going down
- */
- if (cpus_weight(per_cpu(cpu_sibling_map, cpu)) == 1)
- cpu_data(sibling).booted_cores--;
- }
-
- for_each_cpu_mask_nr(sibling, per_cpu(cpu_sibling_map, cpu))
- cpu_clear(cpu, per_cpu(cpu_sibling_map, sibling));
- cpus_clear(per_cpu(cpu_sibling_map, cpu));
- cpus_clear(per_cpu(cpu_core_map, cpu));
- c->phys_proc_id = 0;
- c->cpu_core_id = 0;
- cpu_clear(cpu, cpu_sibling_setup_map);
-}
-
-static int additional_cpus __initdata = -1;
-
-static __init int setup_additional_cpus(char *s)
-{
- return s && get_option(&s, &additional_cpus) ? 0 : -EINVAL;
-}
-early_param("additional_cpus", setup_additional_cpus);
-
/*
* cpu_possible_map should be static, it cannot change as cpu's
* are onlined, or offlined. The reason is per-cpu data-structures
@@ -1306,21 +1279,13 @@ early_param("additional_cpus", setup_additional_cpus);
*/
__init void prefill_possible_map(void)
{
- int i;
- int possible;
+ int i, possible;
/* no processor from mptable or madt */
if (!num_processors)
num_processors = 1;
- if (additional_cpus == -1) {
- if (disabled_cpus > 0)
- additional_cpus = disabled_cpus;
- else
- additional_cpus = 0;
- }
-
- possible = num_processors + additional_cpus;
+ possible = num_processors + disabled_cpus;
if (possible > NR_CPUS)
possible = NR_CPUS;
@@ -1333,6 +1298,31 @@ __init void prefill_possible_map(void)
nr_cpu_ids = possible;
}
+#ifdef CONFIG_HOTPLUG_CPU
+
+static void remove_siblinginfo(int cpu)
+{
+ int sibling;
+ struct cpuinfo_x86 *c = &cpu_data(cpu);
+
+ for_each_cpu_mask_nr(sibling, per_cpu(cpu_core_map, cpu)) {
+ cpu_clear(cpu, per_cpu(cpu_core_map, sibling));
+ /*/
+ * last thread sibling in this cpu core going down
+ */
+ if (cpus_weight(per_cpu(cpu_sibling_map, cpu)) == 1)
+ cpu_data(sibling).booted_cores--;
+ }
+
+ for_each_cpu_mask_nr(sibling, per_cpu(cpu_sibling_map, cpu))
+ cpu_clear(cpu, per_cpu(cpu_sibling_map, sibling));
+ cpus_clear(per_cpu(cpu_sibling_map, cpu));
+ cpus_clear(per_cpu(cpu_core_map, cpu));
+ c->phys_proc_id = 0;
+ c->cpu_core_id = 0;
+ cpu_clear(cpu, cpu_sibling_setup_map);
+}
+
static void __ref remove_cpu_from_maps(int cpu)
{
cpu_clear(cpu, cpu_online_map);
@@ -1343,25 +1333,9 @@ static void __ref remove_cpu_from_maps(int cpu)
numa_remove_cpu(cpu);
}
-int __cpu_disable(void)
+void cpu_disable_common(void)
{
int cpu = smp_processor_id();
-
- /*
- * Perhaps use cpufreq to drop frequency, but that could go
- * into generic code.
- *
- * We won't take down the boot processor on i386 due to some
- * interrupts only being able to be serviced by the BSP.
- * Especially so if we're not using an IOAPIC -zwane
- */
- if (cpu == 0)
- return -EBUSY;
-
- if (nmi_watchdog == NMI_LOCAL_APIC)
- stop_apic_nmi_watchdog(NULL);
- clear_local_APIC();
-
/*
* HACK:
* Allow any queued timer interrupts to get serviced
@@ -1379,10 +1353,32 @@ int __cpu_disable(void)
remove_cpu_from_maps(cpu);
unlock_vector_lock();
fixup_irqs(cpu_online_map);
+}
+
+int native_cpu_disable(void)
+{
+ int cpu = smp_processor_id();
+
+ /*
+ * Perhaps use cpufreq to drop frequency, but that could go
+ * into generic code.
+ *
+ * We won't take down the boot processor on i386 due to some
+ * interrupts only being able to be serviced by the BSP.
+ * Especially so if we're not using an IOAPIC -zwane
+ */
+ if (cpu == 0)
+ return -EBUSY;
+
+ if (nmi_watchdog == NMI_LOCAL_APIC)
+ stop_apic_nmi_watchdog(NULL);
+ clear_local_APIC();
+
+ cpu_disable_common();
return 0;
}
-void __cpu_die(unsigned int cpu)
+void native_cpu_die(unsigned int cpu)
{
/* We don't do anything here: idle task is faking death itself. */
unsigned int i;
@@ -1399,15 +1395,45 @@ void __cpu_die(unsigned int cpu)
}
printk(KERN_ERR "CPU %u didn't die...\n", cpu);
}
+
+void play_dead_common(void)
+{
+ idle_task_exit();
+ reset_lazy_tlbstate();
+ irq_ctx_exit(raw_smp_processor_id());
+ c1e_remove_cpu(raw_smp_processor_id());
+
+ mb();
+ /* Ack it */
+ __get_cpu_var(cpu_state) = CPU_DEAD;
+
+ /*
+ * With physical CPU hotplug, we should halt the cpu
+ */
+ local_irq_disable();
+}
+
+void native_play_dead(void)
+{
+ play_dead_common();
+ wbinvd_halt();
+}
+
#else /* ... !CONFIG_HOTPLUG_CPU */
-int __cpu_disable(void)
+int native_cpu_disable(void)
{
return -ENOSYS;
}
-void __cpu_die(unsigned int cpu)
+void native_cpu_die(unsigned int cpu)
{
/* We said "no" in __cpu_disable */
BUG();
}
+
+void native_play_dead(void)
+{
+ BUG();
+}
+
#endif
diff --git a/arch/x86/kernel/tlb_32.c b/arch/x86/kernel/tlb_32.c
index fec1ece..e00534b 100644
--- a/arch/x86/kernel/tlb_32.c
+++ b/arch/x86/kernel/tlb_32.c
@@ -241,3 +241,11 @@ void flush_tlb_all(void)
on_each_cpu(do_flush_tlb_all, NULL, 1);
}
+void reset_lazy_tlbstate(void)
+{
+ int cpu = raw_smp_processor_id();
+
+ per_cpu(cpu_tlbstate, cpu).state = 0;
+ per_cpu(cpu_tlbstate, cpu).active_mm = &init_mm;
+}
+
diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps.c
similarity index 60%
rename from arch/x86/kernel/traps_32.c
rename to arch/x86/kernel/traps.c
index 0429c5d..ffb131f 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps.c
@@ -7,13 +7,11 @@
*/
/*
- * 'Traps.c' handles hardware traps and faults after we have saved some
- * state in 'asm.s'.
+ * Handle hardware traps and faults.
*/
#include <linux/interrupt.h>
#include <linux/kallsyms.h>
#include <linux/spinlock.h>
-#include <linux/highmem.h>
#include <linux/kprobes.h>
#include <linux/uaccess.h>
#include <linux/utsname.h>
@@ -32,6 +30,8 @@
#include <linux/bug.h>
#include <linux/nmi.h>
#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/io.h>
#ifdef CONFIG_EISA
#include <linux/ioport.h>
@@ -46,21 +46,31 @@
#include <linux/edac.h>
#endif
-#include <asm/arch_hooks.h>
#include <asm/stacktrace.h>
#include <asm/processor.h>
#include <asm/debugreg.h>
#include <asm/atomic.h>
#include <asm/system.h>
#include <asm/unwind.h>
+#include <asm/traps.h>
#include <asm/desc.h>
#include <asm/i387.h>
+
+#include <mach_traps.h>
+
+#ifdef CONFIG_X86_64
+#include <asm/pgalloc.h>
+#include <asm/proto.h>
+#include <asm/pda.h>
+#else
+#include <asm/processor-flags.h>
+#include <asm/arch_hooks.h>
#include <asm/nmi.h>
#include <asm/smp.h>
#include <asm/io.h>
#include <asm/traps.h>
-#include "mach_traps.h"
+#include "cpu/mcheck/mce.h"
DECLARE_BITMAP(used_vectors, NR_VECTORS);
EXPORT_SYMBOL_GPL(used_vectors);
@@ -77,418 +87,104 @@ char ignore_fpu_irq;
*/
gate_desc idt_table[256]
__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
-
-int panic_on_unrecovered_nmi;
-int kstack_depth_to_print = 24;
-static unsigned int code_bytes = 64;
-static int ignore_nmis;
-static int die_counter;
-
-void printk_address(unsigned long address, int reliable)
-{
-#ifdef CONFIG_KALLSYMS
- unsigned long offset = 0;
- unsigned long symsize;
- const char *symname;
- char *modname;
- char *delim = ":";
- char namebuf[KSYM_NAME_LEN];
- char reliab[4] = "";
-
- symname = kallsyms_lookup(address, &symsize, &offset,
- &modname, namebuf);
- if (!symname) {
- printk(" [<%08lx>]\n", address);
- return;
- }
- if (!reliable)
- strcpy(reliab, "? ");
-
- if (!modname)
- modname = delim = "";
- printk(" [<%08lx>] %s%s%s%s%s+0x%lx/0x%lx\n",
- address, reliab, delim, modname, delim, symname, offset, symsize);
-#else
- printk(" [<%08lx>]\n", address);
-#endif
-}
-
-static inline int valid_stack_ptr(struct thread_info *tinfo,
- void *p, unsigned int size)
-{
- void *t = tinfo;
- return p > t && p <= t + THREAD_SIZE - size;
-}
-
-/* The form of the top of the frame on the stack */
-struct stack_frame {
- struct stack_frame *next_frame;
- unsigned long return_address;
-};
-
-static inline unsigned long
-print_context_stack(struct thread_info *tinfo,
- unsigned long *stack, unsigned long bp,
- const struct stacktrace_ops *ops, void *data)
-{
- struct stack_frame *frame = (struct stack_frame *)bp;
-
- while (valid_stack_ptr(tinfo, stack, sizeof(*stack))) {
- unsigned long addr;
-
- addr = *stack;
- if (__kernel_text_address(addr)) {
- if ((unsigned long) stack == bp + 4) {
- ops->address(data, addr, 1);
- frame = frame->next_frame;
- bp = (unsigned long) frame;
- } else {
- ops->address(data, addr, bp == 0);
- }
- }
- stack++;
- }
- return bp;
-}
-
-void dump_trace(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp,
- const struct stacktrace_ops *ops, void *data)
-{
- if (!task)
- task = current;
-
- if (!stack) {
- unsigned long dummy;
- stack = &dummy;
- if (task != current)
- stack = (unsigned long *)task->thread.sp;
- }
-
-#ifdef CONFIG_FRAME_POINTER
- if (!bp) {
- if (task == current) {
- /* Grab bp right from our regs */
- asm("movl %%ebp, %0" : "=r" (bp) :);
- } else {
- /* bp is the last reg pushed by switch_to */
- bp = *(unsigned long *) task->thread.sp;
- }
- }
#endif
- for (;;) {
- struct thread_info *context;
-
- context = (struct thread_info *)
- ((unsigned long)stack & (~(THREAD_SIZE - 1)));
- bp = print_context_stack(context, stack, bp, ops, data);
- /*
- * Should be after the line below, but somewhere
- * in early boot context comes out corrupted and we
- * can't reference it:
- */
- if (ops->stack(data, "IRQ") < 0)
- break;
- stack = (unsigned long *)context->previous_esp;
- if (!stack)
- break;
- touch_nmi_watchdog();
- }
-}
-EXPORT_SYMBOL(dump_trace);
-
-static void
-print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
-{
- printk(data);
- print_symbol(msg, symbol);
- printk("\n");
-}
-
-static void print_trace_warning(void *data, char *msg)
-{
- printk("%s%s\n", (char *)data, msg);
-}
-
-static int print_trace_stack(void *data, char *name)
-{
- return 0;
-}
-
-/*
- * Print one address/symbol entries per line.
- */
-static void print_trace_address(void *data, unsigned long addr, int reliable)
-{
- printk("%s [<%08lx>] ", (char *)data, addr);
- if (!reliable)
- printk("? ");
- print_symbol("%s\n", addr);
- touch_nmi_watchdog();
-}
-
-static const struct stacktrace_ops print_trace_ops = {
- .warning = print_trace_warning,
- .warning_symbol = print_trace_warning_symbol,
- .stack = print_trace_stack,
- .address = print_trace_address,
-};
+static int ignore_nmis;
-static void
-show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp, char *log_lvl)
+static inline void conditional_sti(struct pt_regs *regs)
{
- dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
- printk("%s =======================\n", log_lvl);
+ if (regs->flags & X86_EFLAGS_IF)
+ local_irq_enable();
}
-void show_trace(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp)
+static inline void preempt_conditional_sti(struct pt_regs *regs)
{
- show_trace_log_lvl(task, regs, stack, bp, "");
+ inc_preempt_count();
+ if (regs->flags & X86_EFLAGS_IF)
+ local_irq_enable();
}
-static void
-show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *sp, unsigned long bp, char *log_lvl)
+static inline void preempt_conditional_cli(struct pt_regs *regs)
{
- unsigned long *stack;
- int i;
-
- if (sp == NULL) {
- if (task)
- sp = (unsigned long *)task->thread.sp;
- else
- sp = (unsigned long *)&sp;
- }
-
- stack = sp;
- for (i = 0; i < kstack_depth_to_print; i++) {
- if (kstack_end(stack))
- break;
- if (i && ((i % 8) == 0))
- printk("\n%s ", log_lvl);
- printk("%08lx ", *stack++);
- }
- printk("\n%sCall Trace:\n", log_lvl);
-
- show_trace_log_lvl(task, regs, sp, bp, log_lvl);
+ if (regs->flags & X86_EFLAGS_IF)
+ local_irq_disable();
+ dec_preempt_count();
}
-void show_stack(struct task_struct *task, unsigned long *sp)
+#ifdef CONFIG_X86_32
+static inline void
+die_if_kernel(const char *str, struct pt_regs *regs, long err)
{
- printk(" ");
- show_stack_log_lvl(task, NULL, sp, 0, "");
+ if (!user_mode_vm(regs))
+ die(str, regs, err);
}
/*
- * The architecture-independent dump_stack generator
+ * Perform the lazy TSS's I/O bitmap copy. If the TSS has an
+ * invalid offset set (the LAZY one) and the faulting thread has
+ * a valid I/O bitmap pointer, we copy the I/O bitmap in the TSS,
+ * we set the offset field correctly and return 1.
*/
-void dump_stack(void)
+static int lazy_iobitmap_copy(void)
{
- unsigned long bp = 0;
- unsigned long stack;
-
-#ifdef CONFIG_FRAME_POINTER
- if (!bp)
- asm("movl %%ebp, %0" : "=r" (bp):);
-#endif
-
- printk("Pid: %d, comm: %.20s %s %s %.*s\n",
- current->pid, current->comm, print_tainted(),
- init_utsname()->release,
- (int)strcspn(init_utsname()->version, " "),
- init_utsname()->version);
-
- show_trace(current, NULL, &stack, bp);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
-void show_registers(struct pt_regs *regs)
-{
- int i;
-
- print_modules();
- __show_registers(regs, 0);
-
- printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
- TASK_COMM_LEN, current->comm, task_pid_nr(current),
- current_thread_info(), current, task_thread_info(current));
- /*
- * When in-kernel, we also print out the stack and code at the
- * time of the fault..
- */
- if (!user_mode_vm(regs)) {
- unsigned int code_prologue = code_bytes * 43 / 64;
- unsigned int code_len = code_bytes;
- unsigned char c;
- u8 *ip;
-
- printk("\n" KERN_EMERG "Stack: ");
- show_stack_log_lvl(NULL, regs, ®s->sp, 0, KERN_EMERG);
+ struct thread_struct *thread;
+ struct tss_struct *tss;
+ int cpu;
- printk(KERN_EMERG "Code: ");
+ cpu = get_cpu();
+ tss = &per_cpu(init_tss, cpu);
+ thread = ¤t->thread;
- ip = (u8 *)regs->ip - code_prologue;
- if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
- /* try starting at EIP */
- ip = (u8 *)regs->ip;
- code_len = code_len - code_prologue + 1;
- }
- for (i = 0; i < code_len; i++, ip++) {
- if (ip < (u8 *)PAGE_OFFSET ||
- probe_kernel_address(ip, c)) {
- printk(" Bad EIP value.");
- break;
- }
- if (ip == (u8 *)regs->ip)
- printk("<%02x> ", c);
- else
- printk("%02x ", c);
+ if (tss->x86_tss.io_bitmap_base == INVALID_IO_BITMAP_OFFSET_LAZY &&
+ thread->io_bitmap_ptr) {
+ memcpy(tss->io_bitmap, thread->io_bitmap_ptr,
+ thread->io_bitmap_max);
+ /*
+ * If the previously set map was extending to higher ports
+ * than the current one, pad extra space with 0xff (no access).
+ */
+ if (thread->io_bitmap_max < tss->io_bitmap_max) {
+ memset((char *) tss->io_bitmap +
+ thread->io_bitmap_max, 0xff,
+ tss->io_bitmap_max - thread->io_bitmap_max);
}
- }
- printk("\n");
-}
-
-int is_valid_bugaddr(unsigned long ip)
-{
- unsigned short ud2;
-
- if (ip < PAGE_OFFSET)
- return 0;
- if (probe_kernel_address((unsigned short *)ip, ud2))
- return 0;
-
- return ud2 == 0x0b0f;
-}
-
-static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
-static int die_owner = -1;
-static unsigned int die_nest_count;
-
-unsigned __kprobes long oops_begin(void)
-{
- unsigned long flags;
-
- oops_enter();
-
- if (die_owner != raw_smp_processor_id()) {
- console_verbose();
- raw_local_irq_save(flags);
- __raw_spin_lock(&die_lock);
- die_owner = smp_processor_id();
- die_nest_count = 0;
- bust_spinlocks(1);
- } else {
- raw_local_irq_save(flags);
- }
- die_nest_count++;
- return flags;
-}
-
-void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
-{
- bust_spinlocks(0);
- die_owner = -1;
- add_taint(TAINT_DIE);
- __raw_spin_unlock(&die_lock);
- raw_local_irq_restore(flags);
-
- if (!regs)
- return;
-
- if (kexec_should_crash(current))
- crash_kexec(regs);
-
- if (in_interrupt())
- panic("Fatal exception in interrupt");
-
- if (panic_on_oops)
- panic("Fatal exception");
-
- oops_exit();
- do_exit(signr);
-}
-
-int __kprobes __die(const char *str, struct pt_regs *regs, long err)
-{
- unsigned short ss;
- unsigned long sp;
+ tss->io_bitmap_max = thread->io_bitmap_max;
+ tss->x86_tss.io_bitmap_base = IO_BITMAP_OFFSET;
+ tss->io_bitmap_owner = thread;
+ put_cpu();
- printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter);
-#ifdef CONFIG_PREEMPT
- printk("PREEMPT ");
-#endif
-#ifdef CONFIG_SMP
- printk("SMP ");
-#endif
-#ifdef CONFIG_DEBUG_PAGEALLOC
- printk("DEBUG_PAGEALLOC");
-#endif
- printk("\n");
- if (notify_die(DIE_OOPS, str, regs, err,
- current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
return 1;
-
- show_registers(regs);
- /* Executive summary in case the oops scrolled away */
- sp = (unsigned long) (®s->sp);
- savesegment(ss, ss);
- if (user_mode(regs)) {
- sp = regs->sp;
- ss = regs->ss & 0xffff;
}
- printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip);
- print_symbol("%s", regs->ip);
- printk(" SS:ESP %04x:%08lx\n", ss, sp);
- return 0;
-}
-
-/*
- * This is gone through when something in the kernel has done something bad
- * and is about to be terminated:
- */
-void die(const char *str, struct pt_regs *regs, long err)
-{
- unsigned long flags = oops_begin();
-
- if (die_nest_count < 3) {
- report_bug(regs->ip, regs);
-
- if (__die(str, regs, err))
- regs = NULL;
- } else {
- printk(KERN_EMERG "Recursive die() failure, output suppressed\n");
- }
-
- oops_end(flags, regs, SIGSEGV);
-}
+ put_cpu();
-static inline void
-die_if_kernel(const char *str, struct pt_regs *regs, long err)
-{
- if (!user_mode_vm(regs))
- die(str, regs, err);
+ return 0;
}
+#endif
static void __kprobes
-do_trap(int trapnr, int signr, char *str, int vm86, struct pt_regs *regs,
+do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
long error_code, siginfo_t *info)
{
struct task_struct *tsk = current;
+#ifdef CONFIG_X86_32
if (regs->flags & X86_VM_MASK) {
- if (vm86)
+ /*
+ * traps 0, 1, 3, 4, and 5 should be forwarded to vm86.
+ * On nmi (interrupt 2), do_trap should not be called.
+ */
+ if (trapnr < 6)
goto vm86_trap;
goto trap_signal;
}
+#endif
if (!user_mode(regs))
goto kernel_trap;
+#ifdef CONFIG_X86_32
trap_signal:
+#endif
/*
* We want error_code and trap_no set for userspace faults and
* kernelspace faults which result in die(), but not
@@ -501,6 +197,18 @@ trap_signal:
tsk->thread.error_code = error_code;
tsk->thread.trap_no = trapnr;
+#ifdef CONFIG_X86_64
+ if (show_unhandled_signals && unhandled_signal(tsk, signr) &&
+ printk_ratelimit()) {
+ printk(KERN_INFO
+ "%s[%d] trap %s ip:%lx sp:%lx error:%lx",
+ tsk->comm, tsk->pid, str,
+ regs->ip, regs->sp, error_code);
+ print_vma_addr(" in ", regs->ip);
+ printk("\n");
+ }
+#endif
+
if (info)
force_sig_info(signr, info, tsk);
else
@@ -515,120 +223,98 @@ kernel_trap:
}
return;
+#ifdef CONFIG_X86_32
vm86_trap:
if (handle_vm86_trap((struct kernel_vm86_regs *) regs,
error_code, trapnr))
goto trap_signal;
return;
+#endif
}
#define DO_ERROR(trapnr, signr, str, name) \
-void do_##name(struct pt_regs *regs, long error_code) \
-{ \
- trace_hardirqs_fixup(); \
- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
- == NOTIFY_STOP) \
- return; \
- do_trap(trapnr, signr, str, 0, regs, error_code, NULL); \
-}
-
-#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr, irq) \
-void do_##name(struct pt_regs *regs, long error_code) \
-{ \
- siginfo_t info; \
- if (irq) \
- local_irq_enable(); \
- info.si_signo = signr; \
- info.si_errno = 0; \
- info.si_code = sicode; \
- info.si_addr = (void __user *)siaddr; \
- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
- == NOTIFY_STOP) \
- return; \
- do_trap(trapnr, signr, str, 0, regs, error_code, &info); \
-}
-
-#define DO_VM86_ERROR(trapnr, signr, str, name) \
-void do_##name(struct pt_regs *regs, long error_code) \
+dotraplinkage void do_##name(struct pt_regs *regs, long error_code) \
{ \
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
== NOTIFY_STOP) \
return; \
- do_trap(trapnr, signr, str, 1, regs, error_code, NULL); \
+ conditional_sti(regs); \
+ do_trap(trapnr, signr, str, regs, error_code, NULL); \
}
-#define DO_VM86_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
-void do_##name(struct pt_regs *regs, long error_code) \
+#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
+dotraplinkage void do_##name(struct pt_regs *regs, long error_code) \
{ \
siginfo_t info; \
info.si_signo = signr; \
info.si_errno = 0; \
info.si_code = sicode; \
info.si_addr = (void __user *)siaddr; \
- trace_hardirqs_fixup(); \
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
== NOTIFY_STOP) \
return; \
- do_trap(trapnr, signr, str, 1, regs, error_code, &info); \
+ conditional_sti(regs); \
+ do_trap(trapnr, signr, str, regs, error_code, &info); \
}
-DO_VM86_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
-#ifndef CONFIG_KPROBES
-DO_VM86_ERROR(3, SIGTRAP, "int3", int3)
-#endif
-DO_VM86_ERROR(4, SIGSEGV, "overflow", overflow)
-DO_VM86_ERROR(5, SIGSEGV, "bounds", bounds)
-DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip, 0)
+DO_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
+DO_ERROR(4, SIGSEGV, "overflow", overflow)
+DO_ERROR(5, SIGSEGV, "bounds", bounds)
+DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip)
DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
+#ifdef CONFIG_X86_32
DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
-DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0, 0)
-DO_ERROR_INFO(32, SIGILL, "iret exception", iret_error, ILL_BADSTK, 0, 1)
+#endif
+DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
+
+#ifdef CONFIG_X86_64
+/* Runs on IST stack */
+dotraplinkage void do_stack_segment(struct pt_regs *regs, long error_code)
+{
+ if (notify_die(DIE_TRAP, "stack segment", regs, error_code,
+ 12, SIGBUS) == NOTIFY_STOP)
+ return;
+ preempt_conditional_sti(regs);
+ do_trap(12, SIGBUS, "stack segment", regs, error_code, NULL);
+ preempt_conditional_cli(regs);
+}
-void __kprobes
+dotraplinkage void do_double_fault(struct pt_regs *regs, long error_code)
+{
+ static const char str[] = "double fault";
+ struct task_struct *tsk = current;
+
+ /* Return not checked because double check cannot be ignored */
+ notify_die(DIE_TRAP, str, regs, error_code, 8, SIGSEGV);
+
+ tsk->thread.error_code = error_code;
+ tsk->thread.trap_no = 8;
+
+ /* This is always a kernel trap and never fixable (and thus must
+ never return). */
+ for (;;)
+ die(str, regs, error_code);
+}
+#endif
+
+dotraplinkage void __kprobes
do_general_protection(struct pt_regs *regs, long error_code)
{
struct task_struct *tsk;
- struct thread_struct *thread;
- struct tss_struct *tss;
- int cpu;
- cpu = get_cpu();
- tss = &per_cpu(init_tss, cpu);
- thread = ¤t->thread;
-
- /*
- * Perform the lazy TSS's I/O bitmap copy. If the TSS has an
- * invalid offset set (the LAZY one) and the faulting thread has
- * a valid I/O bitmap pointer, we copy the I/O bitmap in the TSS
- * and we set the offset field correctly. Then we let the CPU to
- * restart the faulting instruction.
- */
- if (tss->x86_tss.io_bitmap_base == INVALID_IO_BITMAP_OFFSET_LAZY &&
- thread->io_bitmap_ptr) {
- memcpy(tss->io_bitmap, thread->io_bitmap_ptr,
- thread->io_bitmap_max);
- /*
- * If the previously set map was extending to higher ports
- * than the current one, pad extra space with 0xff (no access).
- */
- if (thread->io_bitmap_max < tss->io_bitmap_max) {
- memset((char *) tss->io_bitmap +
- thread->io_bitmap_max, 0xff,
- tss->io_bitmap_max - thread->io_bitmap_max);
- }
- tss->io_bitmap_max = thread->io_bitmap_max;
- tss->x86_tss.io_bitmap_base = IO_BITMAP_OFFSET;
- tss->io_bitmap_owner = thread;
- put_cpu();
+ conditional_sti(regs);
+#ifdef CONFIG_X86_32
+ if (lazy_iobitmap_copy()) {
+ /* restart the faulting instruction */
return;
}
- put_cpu();
if (regs->flags & X86_VM_MASK)
goto gp_in_vm86;
+#endif
tsk = current;
if (!user_mode(regs))
@@ -650,10 +336,12 @@ do_general_protection(struct pt_regs *regs, long error_code)
force_sig(SIGSEGV, tsk);
return;
+#ifdef CONFIG_X86_32
gp_in_vm86:
local_irq_enable();
handle_vm86_fault((struct kernel_vm86_regs *) regs, error_code);
return;
+#endif
gp_in_kernel:
if (fixup_exception(regs))
@@ -690,7 +378,8 @@ mem_parity_error(unsigned char reason, struct pt_regs *regs)
printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
/* Clear and disable the memory parity error line. */
- clear_mem_error(reason);
+ reason = (reason & 0xf) | 4;
+ outb(reason, 0x61);
}
static notrace __kprobes void
@@ -716,7 +405,8 @@ io_check_error(unsigned char reason, struct pt_regs *regs)
static notrace __kprobes void
unknown_nmi_error(unsigned char reason, struct pt_regs *regs)
{
- if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
+ if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) ==
+ NOTIFY_STOP)
return;
#ifdef CONFIG_MCA
/*
@@ -739,6 +429,7 @@ unknown_nmi_error(unsigned char reason, struct pt_regs *regs)
printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
}
+#ifdef CONFIG_X86_32
static DEFINE_SPINLOCK(nmi_print_lock);
void notrace __kprobes die_nmi(char *str, struct pt_regs *regs, int do_panic)
@@ -773,6 +464,7 @@ void notrace __kprobes die_nmi(char *str, struct pt_regs *regs, int do_panic)
do_exit(SIGSEGV);
}
+#endif
static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
{
@@ -812,22 +504,25 @@ static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
mem_parity_error(reason, regs);
if (reason & 0x40)
io_check_error(reason, regs);
+#ifdef CONFIG_X86_32
/*
* Reassert NMI in case it became active meanwhile
* as it's edge-triggered:
*/
reassert_nmi();
+#endif
}
-notrace __kprobes void do_nmi(struct pt_regs *regs, long error_code)
+dotraplinkage notrace __kprobes void
+do_nmi(struct pt_regs *regs, long error_code)
{
- int cpu;
-
nmi_enter();
- cpu = smp_processor_id();
-
- ++nmi_count(cpu);
+#ifdef CONFIG_X86_32
+ { int cpu; cpu = smp_processor_id(); ++nmi_count(cpu); }
+#else
+ add_pda(__nmi_count, 1);
+#endif
if (!ignore_nmis)
default_do_nmi(regs);
@@ -847,21 +542,44 @@ void restart_nmi(void)
acpi_nmi_enable();
}
-#ifdef CONFIG_KPROBES
-void __kprobes do_int3(struct pt_regs *regs, long error_code)
+/* May run on IST stack. */
+dotraplinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
{
- trace_hardirqs_fixup();
-
+#ifdef CONFIG_KPROBES
if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
== NOTIFY_STOP)
return;
- /*
- * This is an interrupt gate, because kprobes wants interrupts
- * disabled. Normal trap handlers don't.
- */
- restore_interrupts(regs);
+#else
+ if (notify_die(DIE_TRAP, "int3", regs, error_code, 3, SIGTRAP)
+ == NOTIFY_STOP)
+ return;
+#endif
+
+ preempt_conditional_sti(regs);
+ do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);
+ preempt_conditional_cli(regs);
+}
- do_trap(3, SIGTRAP, "int3", 1, regs, error_code, NULL);
+#ifdef CONFIG_X86_64
+/* Help handler running on IST stack to switch back to user stack
+ for scheduling or signal handling. The actual stack switch is done in
+ entry.S */
+asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *eregs)
+{
+ struct pt_regs *regs = eregs;
+ /* Did already sync */
+ if (eregs == (struct pt_regs *)eregs->sp)
+ ;
+ /* Exception from user space */
+ else if (user_mode(eregs))
+ regs = task_pt_regs(current);
+ /* Exception from kernel and interrupts are enabled. Move to
+ kernel process stack. */
+ else if (eregs->flags & X86_EFLAGS_IF)
+ regs = (struct pt_regs *)(eregs->sp -= sizeof(struct pt_regs));
+ if (eregs != regs)
+ *regs = *eregs;
+ return regs;
}
#endif
@@ -886,15 +604,15 @@ void __kprobes do_int3(struct pt_regs *regs, long error_code)
* about restoring all the debug state, and ptrace doesn't have to
* find every occurrence of the TF bit that could be saved away even
* by user code)
+ *
+ * May run on IST stack.
*/
-void __kprobes do_debug(struct pt_regs *regs, long error_code)
+dotraplinkage void __kprobes do_debug(struct pt_regs *regs, long error_code)
{
struct task_struct *tsk = current;
- unsigned int condition;
+ unsigned long condition;
int si_code;
- trace_hardirqs_fixup();
-
get_debugreg(condition, 6);
/*
@@ -906,9 +624,9 @@ void __kprobes do_debug(struct pt_regs *regs, long error_code)
if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
SIGTRAP) == NOTIFY_STOP)
return;
+
/* It's safe to allow irq's after DR6 has been saved */
- if (regs->flags & X86_EFLAGS_IF)
- local_irq_enable();
+ preempt_conditional_sti(regs);
/* Mask out spurious debug traps due to lazy DR7 setting */
if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
@@ -916,8 +634,10 @@ void __kprobes do_debug(struct pt_regs *regs, long error_code)
goto clear_dr7;
}
+#ifdef CONFIG_X86_32
if (regs->flags & X86_VM_MASK)
goto debug_vm86;
+#endif
/* Save debug status register where ptrace can see it */
tsk->thread.debugreg6 = condition;
@@ -927,16 +647,11 @@ void __kprobes do_debug(struct pt_regs *regs, long error_code)
* kernel space (but re-enable TF when returning to user mode).
*/
if (condition & DR_STEP) {
- /*
- * We already checked v86 mode above, so we can
- * check for kernel mode by just checking the CPL
- * of CS.
- */
if (!user_mode(regs))
goto clear_TF_reenable;
}
- si_code = get_si_code((unsigned long)condition);
+ si_code = get_si_code(condition);
/* Ok, finally something we can handle */
send_sigtrap(tsk, regs, error_code, si_code);
@@ -946,18 +661,37 @@ void __kprobes do_debug(struct pt_regs *regs, long error_code)
*/
clear_dr7:
set_debugreg(0, 7);
+ preempt_conditional_cli(regs);
return;
+#ifdef CONFIG_X86_32
debug_vm86:
handle_vm86_trap((struct kernel_vm86_regs *) regs, error_code, 1);
+ preempt_conditional_cli(regs);
return;
+#endif
clear_TF_reenable:
set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
regs->flags &= ~X86_EFLAGS_TF;
+ preempt_conditional_cli(regs);
return;
}
+#ifdef CONFIG_X86_64
+static int kernel_math_error(struct pt_regs *regs, const char *str, int trapnr)
+{
+ if (fixup_exception(regs))
+ return 1;
+
+ notify_die(DIE_GPF, str, regs, 0, trapnr, SIGFPE);
+ /* Illegal floating point operation in the kernel */
+ current->thread.trap_no = trapnr;
+ die(str, regs, 0);
+ return 0;
+}
+#endif
+
/*
* Note that we play around with the 'TS' bit in an attempt to get
* the correct behaviour even in the presence of the asynchronous
@@ -994,7 +728,9 @@ void math_error(void __user *ip)
swd = get_fpu_swd(task);
switch (swd & ~cwd & 0x3f) {
case 0x000: /* No unmasked exception */
+#ifdef CONFIG_X86_32
return;
+#endif
default: /* Multiple exceptions */
break;
case 0x001: /* Invalid Op */
@@ -1022,9 +758,18 @@ void math_error(void __user *ip)
force_sig_info(SIGFPE, &info, task);
}
-void do_coprocessor_error(struct pt_regs *regs, long error_code)
+dotraplinkage void do_coprocessor_error(struct pt_regs *regs, long error_code)
{
+ conditional_sti(regs);
+
+#ifdef CONFIG_X86_32
ignore_fpu_irq = 1;
+#else
+ if (!user_mode(regs) &&
+ kernel_math_error(regs, "kernel x87 math error", 16))
+ return;
+#endif
+
math_error((void __user *)regs->ip);
}
@@ -1076,8 +821,12 @@ static void simd_math_error(void __user *ip)
force_sig_info(SIGFPE, &info, task);
}
-void do_simd_coprocessor_error(struct pt_regs *regs, long error_code)
+dotraplinkage void
+do_simd_coprocessor_error(struct pt_regs *regs, long error_code)
{
+ conditional_sti(regs);
+
+#ifdef CONFIG_X86_32
if (cpu_has_xmm) {
/* Handle SIMD FPU exceptions on PIII+ processors. */
ignore_fpu_irq = 1;
@@ -1096,16 +845,25 @@ void do_simd_coprocessor_error(struct pt_regs *regs, long error_code)
current->thread.error_code = error_code;
die_if_kernel("cache flush denied", regs, error_code);
force_sig(SIGSEGV, current);
+#else
+ if (!user_mode(regs) &&
+ kernel_math_error(regs, "kernel simd math error", 19))
+ return;
+ simd_math_error((void __user *)regs->ip);
+#endif
}
-void do_spurious_interrupt_bug(struct pt_regs *regs, long error_code)
+dotraplinkage void
+do_spurious_interrupt_bug(struct pt_regs *regs, long error_code)
{
+ conditional_sti(regs);
#if 0
/* No need to warn about this any longer. */
printk(KERN_INFO "Ignoring P6 Local APIC Spurious Interrupt Bug...\n");
#endif
}
+#ifdef CONFIG_X86_32
unsigned long patch_espfix_desc(unsigned long uesp, unsigned long kesp)
{
struct desc_struct *gdt = get_cpu_gdt_table(smp_processor_id());
@@ -1124,6 +882,15 @@ unsigned long patch_espfix_desc(unsigned long uesp, unsigned long kesp)
return new_kesp;
}
+#else
+asmlinkage void __attribute__((weak)) smp_thermal_interrupt(void)
+{
+}
+
+asmlinkage void __attribute__((weak)) mce_threshold_interrupt(void)
+{
+}
+#endif
/*
* 'math_state_restore()' saves the current math information in the
@@ -1156,14 +923,24 @@ asmlinkage void math_state_restore(void)
}
clts(); /* Allow maths ops (or we recurse) */
+#ifdef CONFIG_X86_32
restore_fpu(tsk);
+#else
+ /*
+ * Paranoid restore. send a SIGSEGV if we fail to restore the state.
+ */
+ if (unlikely(restore_fpu_checking(tsk))) {
+ stts();
+ force_sig(SIGSEGV, tsk);
+ return;
+ }
+#endif
thread->status |= TS_USEDFPU; /* So we fnsave on switch_to() */
tsk->fpu_counter++;
}
EXPORT_SYMBOL_GPL(math_state_restore);
#ifndef CONFIG_MATH_EMULATION
-
asmlinkage void math_emulate(long arg)
{
printk(KERN_EMERG
@@ -1172,12 +949,54 @@ asmlinkage void math_emulate(long arg)
force_sig(SIGFPE, current);
schedule();
}
-
#endif /* CONFIG_MATH_EMULATION */
+dotraplinkage void __kprobes
+do_device_not_available(struct pt_regs *regs, long error)
+{
+#ifdef CONFIG_X86_32
+ if (read_cr0() & X86_CR0_EM) {
+ conditional_sti(regs);
+ math_emulate(0);
+ } else {
+ math_state_restore(); /* interrupts still off */
+ conditional_sti(regs);
+ }
+#else
+ math_state_restore();
+#endif
+}
+
+#ifdef CONFIG_X86_32
+#ifdef CONFIG_X86_MCE
+dotraplinkage void __kprobes do_machine_check(struct pt_regs *regs, long error)
+{
+ conditional_sti(regs);
+ machine_check_vector(regs, error);
+}
+#endif
+
+dotraplinkage void do_iret_error(struct pt_regs *regs, long error_code)
+{
+ siginfo_t info;
+ local_irq_enable();
+
+ info.si_signo = SIGILL;
+ info.si_errno = 0;
+ info.si_code = ILL_BADSTK;
+ info.si_addr = 0;
+ if (notify_die(DIE_TRAP, "iret exception",
+ regs, error_code, 32, SIGILL) == NOTIFY_STOP)
+ return;
+ do_trap(32, SIGILL, "iret exception", regs, error_code, &info);
+}
+#endif
+
void __init trap_init(void)
{
+#ifdef CONFIG_X86_32
int i;
+#endif
#ifdef CONFIG_EISA
void __iomem *p = early_ioremap(0x0FFFD9, 4);
@@ -1187,29 +1006,40 @@ void __init trap_init(void)
early_iounmap(p, 4);
#endif
- set_trap_gate(0, ÷_error);
- set_intr_gate(1, &debug);
- set_intr_gate(2, &nmi);
- set_system_intr_gate(3, &int3); /* int3 can be called from all */
- set_system_gate(4, &overflow); /* int4 can be called from all */
- set_trap_gate(5, &bounds);
- set_trap_gate(6, &invalid_op);
- set_trap_gate(7, &device_not_available);
+ set_intr_gate(0, ÷_error);
+ set_intr_gate_ist(1, &debug, DEBUG_STACK);
+ set_intr_gate_ist(2, &nmi, NMI_STACK);
+ /* int3 can be called from all */
+ set_system_intr_gate_ist(3, &int3, DEBUG_STACK);
+ /* int4 can be called from all */
+ set_system_intr_gate(4, &overflow);
+ set_intr_gate(5, &bounds);
+ set_intr_gate(6, &invalid_op);
+ set_intr_gate(7, &device_not_available);
+#ifdef CONFIG_X86_32
set_task_gate(8, GDT_ENTRY_DOUBLEFAULT_TSS);
- set_trap_gate(9, &coprocessor_segment_overrun);
- set_trap_gate(10, &invalid_TSS);
- set_trap_gate(11, &segment_not_present);
- set_trap_gate(12, &stack_segment);
- set_trap_gate(13, &general_protection);
+#else
+ set_intr_gate_ist(8, &double_fault, DOUBLEFAULT_STACK);
+#endif
+ set_intr_gate(9, &coprocessor_segment_overrun);
+ set_intr_gate(10, &invalid_TSS);
+ set_intr_gate(11, &segment_not_present);
+ set_intr_gate_ist(12, &stack_segment, STACKFAULT_STACK);
+ set_intr_gate(13, &general_protection);
set_intr_gate(14, &page_fault);
- set_trap_gate(15, &spurious_interrupt_bug);
- set_trap_gate(16, &coprocessor_error);
- set_trap_gate(17, &alignment_check);
+ set_intr_gate(15, &spurious_interrupt_bug);
+ set_intr_gate(16, &coprocessor_error);
+ set_intr_gate(17, &alignment_check);
#ifdef CONFIG_X86_MCE
- set_trap_gate(18, &machine_check);
+ set_intr_gate_ist(18, &machine_check, MCE_STACK);
#endif
- set_trap_gate(19, &simd_coprocessor_error);
+ set_intr_gate(19, &simd_coprocessor_error);
+#ifdef CONFIG_IA32_EMULATION
+ set_system_intr_gate(IA32_SYSCALL_VECTOR, ia32_syscall);
+#endif
+
+#ifdef CONFIG_X86_32
if (cpu_has_fxsr) {
printk(KERN_INFO "Enabling fast FPU save and restore... ");
set_in_cr4(X86_CR4_OSFXSR);
@@ -1222,36 +1052,20 @@ void __init trap_init(void)
printk("done.\n");
}
- set_system_gate(SYSCALL_VECTOR, &system_call);
+ set_system_trap_gate(SYSCALL_VECTOR, &system_call);
/* Reserve all the builtin and the syscall vector: */
for (i = 0; i < FIRST_EXTERNAL_VECTOR; i++)
set_bit(i, used_vectors);
set_bit(SYSCALL_VECTOR, used_vectors);
-
+#endif
/*
* Should be a barrier for any external CPU state:
*/
cpu_init();
+#ifdef CONFIG_X86_32
trap_init_hook();
+#endif
}
-
-static int __init kstack_setup(char *s)
-{
- kstack_depth_to_print = simple_strtoul(s, NULL, 0);
-
- return 1;
-}
-__setup("kstack=", kstack_setup);
-
-static int __init code_bytes_setup(char *s)
-{
- code_bytes = simple_strtoul(s, NULL, 0);
- if (code_bytes > 8192)
- code_bytes = 8192;
-
- return 1;
-}
-__setup("code_bytes=", code_bytes_setup);
diff --git a/arch/x86/kernel/traps_64.c b/arch/x86/kernel/traps_64.c
deleted file mode 100644
index 9c0ac0c..0000000
--- a/arch/x86/kernel/traps_64.c
+++ /dev/null
@@ -1,1214 +0,0 @@
-/*
- * Copyright (C) 1991, 1992 Linus Torvalds
- * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
- *
- * Pentium III FXSR, SSE support
- * Gareth Hughes <gareth@valinux.com>, May 2000
- */
-
-/*
- * 'Traps.c' handles hardware traps and faults after we have saved some
- * state in 'entry.S'.
- */
-#include <linux/moduleparam.h>
-#include <linux/interrupt.h>
-#include <linux/kallsyms.h>
-#include <linux/spinlock.h>
-#include <linux/kprobes.h>
-#include <linux/uaccess.h>
-#include <linux/utsname.h>
-#include <linux/kdebug.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/ptrace.h>
-#include <linux/string.h>
-#include <linux/unwind.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/kexec.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/init.h>
-#include <linux/bug.h>
-#include <linux/nmi.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/io.h>
-
-#if defined(CONFIG_EDAC)
-#include <linux/edac.h>
-#endif
-
-#include <asm/stacktrace.h>
-#include <asm/processor.h>
-#include <asm/debugreg.h>
-#include <asm/atomic.h>
-#include <asm/system.h>
-#include <asm/unwind.h>
-#include <asm/desc.h>
-#include <asm/i387.h>
-#include <asm/pgalloc.h>
-#include <asm/proto.h>
-#include <asm/pda.h>
-#include <asm/traps.h>
-
-#include <mach_traps.h>
-
-int panic_on_unrecovered_nmi;
-int kstack_depth_to_print = 12;
-static unsigned int code_bytes = 64;
-static int ignore_nmis;
-static int die_counter;
-
-static inline void conditional_sti(struct pt_regs *regs)
-{
- if (regs->flags & X86_EFLAGS_IF)
- local_irq_enable();
-}
-
-static inline void preempt_conditional_sti(struct pt_regs *regs)
-{
- inc_preempt_count();
- if (regs->flags & X86_EFLAGS_IF)
- local_irq_enable();
-}
-
-static inline void preempt_conditional_cli(struct pt_regs *regs)
-{
- if (regs->flags & X86_EFLAGS_IF)
- local_irq_disable();
- /* Make sure to not schedule here because we could be running
- on an exception stack. */
- dec_preempt_count();
-}
-
-void printk_address(unsigned long address, int reliable)
-{
- printk(" [<%016lx>] %s%pS\n",
- address, reliable ? "" : "? ", (void *) address);
-}
-
-static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
- unsigned *usedp, char **idp)
-{
- static char ids[][8] = {
- [DEBUG_STACK - 1] = "#DB",
- [NMI_STACK - 1] = "NMI",
- [DOUBLEFAULT_STACK - 1] = "#DF",
- [STACKFAULT_STACK - 1] = "#SS",
- [MCE_STACK - 1] = "#MC",
-#if DEBUG_STKSZ > EXCEPTION_STKSZ
- [N_EXCEPTION_STACKS ...
- N_EXCEPTION_STACKS + DEBUG_STKSZ / EXCEPTION_STKSZ - 2] = "#DB[?]"
-#endif
- };
- unsigned k;
-
- /*
- * Iterate over all exception stacks, and figure out whether
- * 'stack' is in one of them:
- */
- for (k = 0; k < N_EXCEPTION_STACKS; k++) {
- unsigned long end = per_cpu(orig_ist, cpu).ist[k];
- /*
- * Is 'stack' above this exception frame's end?
- * If yes then skip to the next frame.
- */
- if (stack >= end)
- continue;
- /*
- * Is 'stack' above this exception frame's start address?
- * If yes then we found the right frame.
- */
- if (stack >= end - EXCEPTION_STKSZ) {
- /*
- * Make sure we only iterate through an exception
- * stack once. If it comes up for the second time
- * then there's something wrong going on - just
- * break out and return NULL:
- */
- if (*usedp & (1U << k))
- break;
- *usedp |= 1U << k;
- *idp = ids[k];
- return (unsigned long *)end;
- }
- /*
- * If this is a debug stack, and if it has a larger size than
- * the usual exception stacks, then 'stack' might still
- * be within the lower portion of the debug stack:
- */
-#if DEBUG_STKSZ > EXCEPTION_STKSZ
- if (k == DEBUG_STACK - 1 && stack >= end - DEBUG_STKSZ) {
- unsigned j = N_EXCEPTION_STACKS - 1;
-
- /*
- * Black magic. A large debug stack is composed of
- * multiple exception stack entries, which we
- * iterate through now. Dont look:
- */
- do {
- ++j;
- end -= EXCEPTION_STKSZ;
- ids[j][4] = '1' + (j - N_EXCEPTION_STACKS);
- } while (stack < end - EXCEPTION_STKSZ);
- if (*usedp & (1U << j))
- break;
- *usedp |= 1U << j;
- *idp = ids[j];
- return (unsigned long *)end;
- }
-#endif
- }
- return NULL;
-}
-
-/*
- * x86-64 can have up to three kernel stacks:
- * process stack
- * interrupt stack
- * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
- */
-
-static inline int valid_stack_ptr(struct thread_info *tinfo,
- void *p, unsigned int size, void *end)
-{
- void *t = tinfo;
- if (end) {
- if (p < end && p >= (end-THREAD_SIZE))
- return 1;
- else
- return 0;
- }
- return p > t && p < t + THREAD_SIZE - size;
-}
-
-/* The form of the top of the frame on the stack */
-struct stack_frame {
- struct stack_frame *next_frame;
- unsigned long return_address;
-};
-
-static inline unsigned long
-print_context_stack(struct thread_info *tinfo,
- unsigned long *stack, unsigned long bp,
- const struct stacktrace_ops *ops, void *data,
- unsigned long *end)
-{
- struct stack_frame *frame = (struct stack_frame *)bp;
-
- while (valid_stack_ptr(tinfo, stack, sizeof(*stack), end)) {
- unsigned long addr;
-
- addr = *stack;
- if (__kernel_text_address(addr)) {
- if ((unsigned long) stack == bp + 8) {
- ops->address(data, addr, 1);
- frame = frame->next_frame;
- bp = (unsigned long) frame;
- } else {
- ops->address(data, addr, bp == 0);
- }
- }
- stack++;
- }
- return bp;
-}
-
-void dump_trace(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp,
- const struct stacktrace_ops *ops, void *data)
-{
- const unsigned cpu = get_cpu();
- unsigned long *irqstack_end = (unsigned long *)cpu_pda(cpu)->irqstackptr;
- unsigned used = 0;
- struct thread_info *tinfo;
-
- if (!task)
- task = current;
-
- if (!stack) {
- unsigned long dummy;
- stack = &dummy;
- if (task && task != current)
- stack = (unsigned long *)task->thread.sp;
- }
-
-#ifdef CONFIG_FRAME_POINTER
- if (!bp) {
- if (task == current) {
- /* Grab bp right from our regs */
- asm("movq %%rbp, %0" : "=r" (bp) : );
- } else {
- /* bp is the last reg pushed by switch_to */
- bp = *(unsigned long *) task->thread.sp;
- }
- }
-#endif
-
- /*
- * Print function call entries in all stacks, starting at the
- * current stack address. If the stacks consist of nested
- * exceptions
- */
- tinfo = task_thread_info(task);
- for (;;) {
- char *id;
- unsigned long *estack_end;
- estack_end = in_exception_stack(cpu, (unsigned long)stack,
- &used, &id);
-
- if (estack_end) {
- if (ops->stack(data, id) < 0)
- break;
-
- bp = print_context_stack(tinfo, stack, bp, ops,
- data, estack_end);
- ops->stack(data, "<EOE>");
- /*
- * We link to the next stack via the
- * second-to-last pointer (index -2 to end) in the
- * exception stack:
- */
- stack = (unsigned long *) estack_end[-2];
- continue;
- }
- if (irqstack_end) {
- unsigned long *irqstack;
- irqstack = irqstack_end -
- (IRQSTACKSIZE - 64) / sizeof(*irqstack);
-
- if (stack >= irqstack && stack < irqstack_end) {
- if (ops->stack(data, "IRQ") < 0)
- break;
- bp = print_context_stack(tinfo, stack, bp,
- ops, data, irqstack_end);
- /*
- * We link to the next stack (which would be
- * the process stack normally) the last
- * pointer (index -1 to end) in the IRQ stack:
- */
- stack = (unsigned long *) (irqstack_end[-1]);
- irqstack_end = NULL;
- ops->stack(data, "EOI");
- continue;
- }
- }
- break;
- }
-
- /*
- * This handles the process stack:
- */
- bp = print_context_stack(tinfo, stack, bp, ops, data, NULL);
- put_cpu();
-}
-EXPORT_SYMBOL(dump_trace);
-
-static void
-print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
-{
- print_symbol(msg, symbol);
- printk("\n");
-}
-
-static void print_trace_warning(void *data, char *msg)
-{
- printk("%s\n", msg);
-}
-
-static int print_trace_stack(void *data, char *name)
-{
- printk(" <%s> ", name);
- return 0;
-}
-
-static void print_trace_address(void *data, unsigned long addr, int reliable)
-{
- touch_nmi_watchdog();
- printk_address(addr, reliable);
-}
-
-static const struct stacktrace_ops print_trace_ops = {
- .warning = print_trace_warning,
- .warning_symbol = print_trace_warning_symbol,
- .stack = print_trace_stack,
- .address = print_trace_address,
-};
-
-static void
-show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp, char *log_lvl)
-{
- printk("Call Trace:\n");
- dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
-}
-
-void show_trace(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp)
-{
- show_trace_log_lvl(task, regs, stack, bp, "");
-}
-
-static void
-show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *sp, unsigned long bp, char *log_lvl)
-{
- unsigned long *stack;
- int i;
- const int cpu = smp_processor_id();
- unsigned long *irqstack_end =
- (unsigned long *) (cpu_pda(cpu)->irqstackptr);
- unsigned long *irqstack =
- (unsigned long *) (cpu_pda(cpu)->irqstackptr - IRQSTACKSIZE);
-
- /*
- * debugging aid: "show_stack(NULL, NULL);" prints the
- * back trace for this cpu.
- */
-
- if (sp == NULL) {
- if (task)
- sp = (unsigned long *)task->thread.sp;
- else
- sp = (unsigned long *)&sp;
- }
-
- stack = sp;
- for (i = 0; i < kstack_depth_to_print; i++) {
- if (stack >= irqstack && stack <= irqstack_end) {
- if (stack == irqstack_end) {
- stack = (unsigned long *) (irqstack_end[-1]);
- printk(" <EOI> ");
- }
- } else {
- if (((long) stack & (THREAD_SIZE-1)) == 0)
- break;
- }
- if (i && ((i % 4) == 0))
- printk("\n");
- printk(" %016lx", *stack++);
- touch_nmi_watchdog();
- }
- printk("\n");
- show_trace_log_lvl(task, regs, sp, bp, log_lvl);
-}
-
-void show_stack(struct task_struct *task, unsigned long *sp)
-{
- show_stack_log_lvl(task, NULL, sp, 0, "");
-}
-
-/*
- * The architecture-independent dump_stack generator
- */
-void dump_stack(void)
-{
- unsigned long bp = 0;
- unsigned long stack;
-
-#ifdef CONFIG_FRAME_POINTER
- if (!bp)
- asm("movq %%rbp, %0" : "=r" (bp) : );
-#endif
-
- printk("Pid: %d, comm: %.20s %s %s %.*s\n",
- current->pid, current->comm, print_tainted(),
- init_utsname()->release,
- (int)strcspn(init_utsname()->version, " "),
- init_utsname()->version);
- show_trace(NULL, NULL, &stack, bp);
-}
-EXPORT_SYMBOL(dump_stack);
-
-void show_registers(struct pt_regs *regs)
-{
- int i;
- unsigned long sp;
- const int cpu = smp_processor_id();
- struct task_struct *cur = cpu_pda(cpu)->pcurrent;
-
- sp = regs->sp;
- printk("CPU %d ", cpu);
- __show_regs(regs);
- printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
- cur->comm, cur->pid, task_thread_info(cur), cur);
-
- /*
- * When in-kernel, we also print out the stack and code at the
- * time of the fault..
- */
- if (!user_mode(regs)) {
- unsigned int code_prologue = code_bytes * 43 / 64;
- unsigned int code_len = code_bytes;
- unsigned char c;
- u8 *ip;
-
- printk("Stack: ");
- show_stack_log_lvl(NULL, regs, (unsigned long *)sp,
- regs->bp, "");
-
- printk(KERN_EMERG "Code: ");
-
- ip = (u8 *)regs->ip - code_prologue;
- if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
- /* try starting at RIP */
- ip = (u8 *)regs->ip;
- code_len = code_len - code_prologue + 1;
- }
- for (i = 0; i < code_len; i++, ip++) {
- if (ip < (u8 *)PAGE_OFFSET ||
- probe_kernel_address(ip, c)) {
- printk(" Bad RIP value.");
- break;
- }
- if (ip == (u8 *)regs->ip)
- printk("<%02x> ", c);
- else
- printk("%02x ", c);
- }
- }
- printk("\n");
-}
-
-int is_valid_bugaddr(unsigned long ip)
-{
- unsigned short ud2;
-
- if (__copy_from_user(&ud2, (const void __user *) ip, sizeof(ud2)))
- return 0;
-
- return ud2 == 0x0b0f;
-}
-
-static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
-static int die_owner = -1;
-static unsigned int die_nest_count;
-
-unsigned __kprobes long oops_begin(void)
-{
- int cpu;
- unsigned long flags;
-
- oops_enter();
-
- /* racy, but better than risking deadlock. */
- raw_local_irq_save(flags);
- cpu = smp_processor_id();
- if (!__raw_spin_trylock(&die_lock)) {
- if (cpu == die_owner)
- /* nested oops. should stop eventually */;
- else
- __raw_spin_lock(&die_lock);
- }
- die_nest_count++;
- die_owner = cpu;
- console_verbose();
- bust_spinlocks(1);
- return flags;
-}
-
-void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
-{
- die_owner = -1;
- bust_spinlocks(0);
- die_nest_count--;
- if (!die_nest_count)
- /* Nest count reaches zero, release the lock. */
- __raw_spin_unlock(&die_lock);
- raw_local_irq_restore(flags);
- if (!regs) {
- oops_exit();
- return;
- }
- if (panic_on_oops)
- panic("Fatal exception");
- oops_exit();
- do_exit(signr);
-}
-
-int __kprobes __die(const char *str, struct pt_regs *regs, long err)
-{
- printk(KERN_EMERG "%s: %04lx [%u] ", str, err & 0xffff, ++die_counter);
-#ifdef CONFIG_PREEMPT
- printk("PREEMPT ");
-#endif
-#ifdef CONFIG_SMP
- printk("SMP ");
-#endif
-#ifdef CONFIG_DEBUG_PAGEALLOC
- printk("DEBUG_PAGEALLOC");
-#endif
- printk("\n");
- if (notify_die(DIE_OOPS, str, regs, err,
- current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
- return 1;
-
- show_registers(regs);
- add_taint(TAINT_DIE);
- /* Executive summary in case the oops scrolled away */
- printk(KERN_ALERT "RIP ");
- printk_address(regs->ip, 1);
- printk(" RSP <%016lx>\n", regs->sp);
- if (kexec_should_crash(current))
- crash_kexec(regs);
- return 0;
-}
-
-void die(const char *str, struct pt_regs *regs, long err)
-{
- unsigned long flags = oops_begin();
-
- if (!user_mode(regs))
- report_bug(regs->ip, regs);
-
- if (__die(str, regs, err))
- regs = NULL;
- oops_end(flags, regs, SIGSEGV);
-}
-
-notrace __kprobes void
-die_nmi(char *str, struct pt_regs *regs, int do_panic)
-{
- unsigned long flags;
-
- if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
- return;
-
- flags = oops_begin();
- /*
- * We are in trouble anyway, lets at least try
- * to get a message out.
- */
- printk(KERN_EMERG "%s", str);
- printk(" on CPU%d, ip %08lx, registers:\n",
- smp_processor_id(), regs->ip);
- show_registers(regs);
- if (kexec_should_crash(current))
- crash_kexec(regs);
- if (do_panic || panic_on_oops)
- panic("Non maskable interrupt");
- oops_end(flags, NULL, SIGBUS);
- nmi_exit();
- local_irq_enable();
- do_exit(SIGBUS);
-}
-
-static void __kprobes
-do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
- long error_code, siginfo_t *info)
-{
- struct task_struct *tsk = current;
-
- if (!user_mode(regs))
- goto kernel_trap;
-
- /*
- * We want error_code and trap_no set for userspace faults and
- * kernelspace faults which result in die(), but not
- * kernelspace faults which are fixed up. die() gives the
- * process no chance to handle the signal and notice the
- * kernel fault information, so that won't result in polluting
- * the information about previously queued, but not yet
- * delivered, faults. See also do_general_protection below.
- */
- tsk->thread.error_code = error_code;
- tsk->thread.trap_no = trapnr;
-
- if (show_unhandled_signals && unhandled_signal(tsk, signr) &&
- printk_ratelimit()) {
- printk(KERN_INFO
- "%s[%d] trap %s ip:%lx sp:%lx error:%lx",
- tsk->comm, tsk->pid, str,
- regs->ip, regs->sp, error_code);
- print_vma_addr(" in ", regs->ip);
- printk("\n");
- }
-
- if (info)
- force_sig_info(signr, info, tsk);
- else
- force_sig(signr, tsk);
- return;
-
-kernel_trap:
- if (!fixup_exception(regs)) {
- tsk->thread.error_code = error_code;
- tsk->thread.trap_no = trapnr;
- die(str, regs, error_code);
- }
- return;
-}
-
-#define DO_ERROR(trapnr, signr, str, name) \
-asmlinkage void do_##name(struct pt_regs *regs, long error_code) \
-{ \
- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
- == NOTIFY_STOP) \
- return; \
- conditional_sti(regs); \
- do_trap(trapnr, signr, str, regs, error_code, NULL); \
-}
-
-#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
-asmlinkage void do_##name(struct pt_regs *regs, long error_code) \
-{ \
- siginfo_t info; \
- info.si_signo = signr; \
- info.si_errno = 0; \
- info.si_code = sicode; \
- info.si_addr = (void __user *)siaddr; \
- trace_hardirqs_fixup(); \
- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
- == NOTIFY_STOP) \
- return; \
- conditional_sti(regs); \
- do_trap(trapnr, signr, str, regs, error_code, &info); \
-}
-
-DO_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
-DO_ERROR(4, SIGSEGV, "overflow", overflow)
-DO_ERROR(5, SIGSEGV, "bounds", bounds)
-DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip)
-DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
-DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
-DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
-DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
-
-/* Runs on IST stack */
-asmlinkage void do_stack_segment(struct pt_regs *regs, long error_code)
-{
- if (notify_die(DIE_TRAP, "stack segment", regs, error_code,
- 12, SIGBUS) == NOTIFY_STOP)
- return;
- preempt_conditional_sti(regs);
- do_trap(12, SIGBUS, "stack segment", regs, error_code, NULL);
- preempt_conditional_cli(regs);
-}
-
-asmlinkage void do_double_fault(struct pt_regs *regs, long error_code)
-{
- static const char str[] = "double fault";
- struct task_struct *tsk = current;
-
- /* Return not checked because double check cannot be ignored */
- notify_die(DIE_TRAP, str, regs, error_code, 8, SIGSEGV);
-
- tsk->thread.error_code = error_code;
- tsk->thread.trap_no = 8;
-
- /* This is always a kernel trap and never fixable (and thus must
- never return). */
- for (;;)
- die(str, regs, error_code);
-}
-
-asmlinkage void __kprobes
-do_general_protection(struct pt_regs *regs, long error_code)
-{
- struct task_struct *tsk;
-
- conditional_sti(regs);
-
- tsk = current;
- if (!user_mode(regs))
- goto gp_in_kernel;
-
- tsk->thread.error_code = error_code;
- tsk->thread.trap_no = 13;
-
- if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
- printk_ratelimit()) {
- printk(KERN_INFO
- "%s[%d] general protection ip:%lx sp:%lx error:%lx",
- tsk->comm, tsk->pid,
- regs->ip, regs->sp, error_code);
- print_vma_addr(" in ", regs->ip);
- printk("\n");
- }
-
- force_sig(SIGSEGV, tsk);
- return;
-
-gp_in_kernel:
- if (fixup_exception(regs))
- return;
-
- tsk->thread.error_code = error_code;
- tsk->thread.trap_no = 13;
- if (notify_die(DIE_GPF, "general protection fault", regs,
- error_code, 13, SIGSEGV) == NOTIFY_STOP)
- return;
- die("general protection fault", regs, error_code);
-}
-
-static notrace __kprobes void
-mem_parity_error(unsigned char reason, struct pt_regs *regs)
-{
- printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x.\n",
- reason);
- printk(KERN_EMERG "You have some hardware problem, likely on the PCI bus.\n");
-
-#if defined(CONFIG_EDAC)
- if (edac_handler_set()) {
- edac_atomic_assert_error();
- return;
- }
-#endif
-
- if (panic_on_unrecovered_nmi)
- panic("NMI: Not continuing");
-
- printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
-
- /* Clear and disable the memory parity error line. */
- reason = (reason & 0xf) | 4;
- outb(reason, 0x61);
-}
-
-static notrace __kprobes void
-io_check_error(unsigned char reason, struct pt_regs *regs)
-{
- printk("NMI: IOCK error (debug interrupt?)\n");
- show_registers(regs);
-
- /* Re-enable the IOCK line, wait for a few seconds */
- reason = (reason & 0xf) | 8;
- outb(reason, 0x61);
- mdelay(2000);
- reason &= ~8;
- outb(reason, 0x61);
-}
-
-static notrace __kprobes void
-unknown_nmi_error(unsigned char reason, struct pt_regs *regs)
-{
- if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) ==
- NOTIFY_STOP)
- return;
- printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x.\n",
- reason);
- printk(KERN_EMERG "Do you have a strange power saving mode enabled?\n");
-
- if (panic_on_unrecovered_nmi)
- panic("NMI: Not continuing");
-
- printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
-}
-
-/* Runs on IST stack. This code must keep interrupts off all the time.
- Nested NMIs are prevented by the CPU. */
-asmlinkage notrace __kprobes void default_do_nmi(struct pt_regs *regs)
-{
- unsigned char reason = 0;
- int cpu;
-
- cpu = smp_processor_id();
-
- /* Only the BSP gets external NMIs from the system. */
- if (!cpu)
- reason = get_nmi_reason();
-
- if (!(reason & 0xc0)) {
- if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
- == NOTIFY_STOP)
- return;
- /*
- * Ok, so this is none of the documented NMI sources,
- * so it must be the NMI watchdog.
- */
- if (nmi_watchdog_tick(regs, reason))
- return;
- if (!do_nmi_callback(regs, cpu))
- unknown_nmi_error(reason, regs);
-
- return;
- }
- if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
- return;
-
- /* AK: following checks seem to be broken on modern chipsets. FIXME */
- if (reason & 0x80)
- mem_parity_error(reason, regs);
- if (reason & 0x40)
- io_check_error(reason, regs);
-}
-
-asmlinkage notrace __kprobes void
-do_nmi(struct pt_regs *regs, long error_code)
-{
- nmi_enter();
-
- add_pda(__nmi_count, 1);
-
- if (!ignore_nmis)
- default_do_nmi(regs);
-
- nmi_exit();
-}
-
-void stop_nmi(void)
-{
- acpi_nmi_disable();
- ignore_nmis++;
-}
-
-void restart_nmi(void)
-{
- ignore_nmis--;
- acpi_nmi_enable();
-}
-
-/* runs on IST stack. */
-asmlinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
-{
- trace_hardirqs_fixup();
-
- if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
- == NOTIFY_STOP)
- return;
-
- preempt_conditional_sti(regs);
- do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);
- preempt_conditional_cli(regs);
-}
-
-/* Help handler running on IST stack to switch back to user stack
- for scheduling or signal handling. The actual stack switch is done in
- entry.S */
-asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *eregs)
-{
- struct pt_regs *regs = eregs;
- /* Did already sync */
- if (eregs == (struct pt_regs *)eregs->sp)
- ;
- /* Exception from user space */
- else if (user_mode(eregs))
- regs = task_pt_regs(current);
- /* Exception from kernel and interrupts are enabled. Move to
- kernel process stack. */
- else if (eregs->flags & X86_EFLAGS_IF)
- regs = (struct pt_regs *)(eregs->sp -= sizeof(struct pt_regs));
- if (eregs != regs)
- *regs = *eregs;
- return regs;
-}
-
-/* runs on IST stack. */
-asmlinkage void __kprobes do_debug(struct pt_regs *regs,
- unsigned long error_code)
-{
- struct task_struct *tsk = current;
- unsigned long condition;
- siginfo_t info;
-
- trace_hardirqs_fixup();
-
- get_debugreg(condition, 6);
-
- /*
- * The processor cleared BTF, so don't mark that we need it set.
- */
- clear_tsk_thread_flag(tsk, TIF_DEBUGCTLMSR);
- tsk->thread.debugctlmsr = 0;
-
- if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
- SIGTRAP) == NOTIFY_STOP)
- return;
-
- preempt_conditional_sti(regs);
-
- /* Mask out spurious debug traps due to lazy DR7 setting */
- if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
- if (!tsk->thread.debugreg7)
- goto clear_dr7;
- }
-
- tsk->thread.debugreg6 = condition;
-
- /*
- * Single-stepping through TF: make sure we ignore any events in
- * kernel space (but re-enable TF when returning to user mode).
- */
- if (condition & DR_STEP) {
- if (!user_mode(regs))
- goto clear_TF_reenable;
- }
-
- /* Ok, finally something we can handle */
- tsk->thread.trap_no = 1;
- tsk->thread.error_code = error_code;
- info.si_signo = SIGTRAP;
- info.si_errno = 0;
- info.si_code = get_si_code(condition);
- info.si_addr = user_mode(regs) ? (void __user *)regs->ip : NULL;
- force_sig_info(SIGTRAP, &info, tsk);
-
-clear_dr7:
- set_debugreg(0, 7);
- preempt_conditional_cli(regs);
- return;
-
-clear_TF_reenable:
- set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
- regs->flags &= ~X86_EFLAGS_TF;
- preempt_conditional_cli(regs);
- return;
-}
-
-static int kernel_math_error(struct pt_regs *regs, const char *str, int trapnr)
-{
- if (fixup_exception(regs))
- return 1;
-
- notify_die(DIE_GPF, str, regs, 0, trapnr, SIGFPE);
- /* Illegal floating point operation in the kernel */
- current->thread.trap_no = trapnr;
- die(str, regs, 0);
- return 0;
-}
-
-/*
- * Note that we play around with the 'TS' bit in an attempt to get
- * the correct behaviour even in the presence of the asynchronous
- * IRQ13 behaviour
- */
-asmlinkage void do_coprocessor_error(struct pt_regs *regs)
-{
- void __user *ip = (void __user *)(regs->ip);
- struct task_struct *task;
- siginfo_t info;
- unsigned short cwd, swd;
-
- conditional_sti(regs);
- if (!user_mode(regs) &&
- kernel_math_error(regs, "kernel x87 math error", 16))
- return;
-
- /*
- * Save the info for the exception handler and clear the error.
- */
- task = current;
- save_init_fpu(task);
- task->thread.trap_no = 16;
- task->thread.error_code = 0;
- info.si_signo = SIGFPE;
- info.si_errno = 0;
- info.si_code = __SI_FAULT;
- info.si_addr = ip;
- /*
- * (~cwd & swd) will mask out exceptions that are not set to unmasked
- * status. 0x3f is the exception bits in these regs, 0x200 is the
- * C1 reg you need in case of a stack fault, 0x040 is the stack
- * fault bit. We should only be taking one exception at a time,
- * so if this combination doesn't produce any single exception,
- * then we have a bad program that isn't synchronizing its FPU usage
- * and it will suffer the consequences since we won't be able to
- * fully reproduce the context of the exception
- */
- cwd = get_fpu_cwd(task);
- swd = get_fpu_swd(task);
- switch (swd & ~cwd & 0x3f) {
- case 0x000: /* No unmasked exception */
- default: /* Multiple exceptions */
- break;
- case 0x001: /* Invalid Op */
- /*
- * swd & 0x240 == 0x040: Stack Underflow
- * swd & 0x240 == 0x240: Stack Overflow
- * User must clear the SF bit (0x40) if set
- */
- info.si_code = FPE_FLTINV;
- break;
- case 0x002: /* Denormalize */
- case 0x010: /* Underflow */
- info.si_code = FPE_FLTUND;
- break;
- case 0x004: /* Zero Divide */
- info.si_code = FPE_FLTDIV;
- break;
- case 0x008: /* Overflow */
- info.si_code = FPE_FLTOVF;
- break;
- case 0x020: /* Precision */
- info.si_code = FPE_FLTRES;
- break;
- }
- force_sig_info(SIGFPE, &info, task);
-}
-
-asmlinkage void bad_intr(void)
-{
- printk("bad interrupt");
-}
-
-asmlinkage void do_simd_coprocessor_error(struct pt_regs *regs)
-{
- void __user *ip = (void __user *)(regs->ip);
- struct task_struct *task;
- siginfo_t info;
- unsigned short mxcsr;
-
- conditional_sti(regs);
- if (!user_mode(regs) &&
- kernel_math_error(regs, "kernel simd math error", 19))
- return;
-
- /*
- * Save the info for the exception handler and clear the error.
- */
- task = current;
- save_init_fpu(task);
- task->thread.trap_no = 19;
- task->thread.error_code = 0;
- info.si_signo = SIGFPE;
- info.si_errno = 0;
- info.si_code = __SI_FAULT;
- info.si_addr = ip;
- /*
- * The SIMD FPU exceptions are handled a little differently, as there
- * is only a single status/control register. Thus, to determine which
- * unmasked exception was caught we must mask the exception mask bits
- * at 0x1f80, and then use these to mask the exception bits at 0x3f.
- */
- mxcsr = get_fpu_mxcsr(task);
- switch (~((mxcsr & 0x1f80) >> 7) & (mxcsr & 0x3f)) {
- case 0x000:
- default:
- break;
- case 0x001: /* Invalid Op */
- info.si_code = FPE_FLTINV;
- break;
- case 0x002: /* Denormalize */
- case 0x010: /* Underflow */
- info.si_code = FPE_FLTUND;
- break;
- case 0x004: /* Zero Divide */
- info.si_code = FPE_FLTDIV;
- break;
- case 0x008: /* Overflow */
- info.si_code = FPE_FLTOVF;
- break;
- case 0x020: /* Precision */
- info.si_code = FPE_FLTRES;
- break;
- }
- force_sig_info(SIGFPE, &info, task);
-}
-
-asmlinkage void do_spurious_interrupt_bug(struct pt_regs *regs)
-{
-}
-
-asmlinkage void __attribute__((weak)) smp_thermal_interrupt(void)
-{
-}
-
-asmlinkage void __attribute__((weak)) mce_threshold_interrupt(void)
-{
-}
-
-/*
- * 'math_state_restore()' saves the current math information in the
- * old math state array, and gets the new ones from the current task
- *
- * Careful.. There are problems with IBM-designed IRQ13 behaviour.
- * Don't touch unless you *really* know how it works.
- */
-asmlinkage void math_state_restore(void)
-{
- struct task_struct *me = current;
-
- if (!used_math()) {
- local_irq_enable();
- /*
- * does a slab alloc which can sleep
- */
- if (init_fpu(me)) {
- /*
- * ran out of memory!
- */
- do_group_exit(SIGKILL);
- return;
- }
- local_irq_disable();
- }
-
- clts(); /* Allow maths ops (or we recurse) */
- /*
- * Paranoid restore. send a SIGSEGV if we fail to restore the state.
- */
- if (unlikely(restore_fpu_checking(me))) {
- stts();
- force_sig(SIGSEGV, me);
- return;
- }
- task_thread_info(me)->status |= TS_USEDFPU;
- me->fpu_counter++;
-}
-EXPORT_SYMBOL_GPL(math_state_restore);
-
-void __init trap_init(void)
-{
- set_intr_gate(0, ÷_error);
- set_intr_gate_ist(1, &debug, DEBUG_STACK);
- set_intr_gate_ist(2, &nmi, NMI_STACK);
- /* int3 can be called from all */
- set_system_gate_ist(3, &int3, DEBUG_STACK);
- /* int4 can be called from all */
- set_system_gate(4, &overflow);
- set_intr_gate(5, &bounds);
- set_intr_gate(6, &invalid_op);
- set_intr_gate(7, &device_not_available);
- set_intr_gate_ist(8, &double_fault, DOUBLEFAULT_STACK);
- set_intr_gate(9, &coprocessor_segment_overrun);
- set_intr_gate(10, &invalid_TSS);
- set_intr_gate(11, &segment_not_present);
- set_intr_gate_ist(12, &stack_segment, STACKFAULT_STACK);
- set_intr_gate(13, &general_protection);
- set_intr_gate(14, &page_fault);
- set_intr_gate(15, &spurious_interrupt_bug);
- set_intr_gate(16, &coprocessor_error);
- set_intr_gate(17, &alignment_check);
-#ifdef CONFIG_X86_MCE
- set_intr_gate_ist(18, &machine_check, MCE_STACK);
-#endif
- set_intr_gate(19, &simd_coprocessor_error);
-
-#ifdef CONFIG_IA32_EMULATION
- set_system_gate(IA32_SYSCALL_VECTOR, ia32_syscall);
-#endif
- /*
- * Should be a barrier for any external CPU state:
- */
- cpu_init();
-}
-
-static int __init oops_setup(char *s)
-{
- if (!s)
- return -EINVAL;
- if (!strcmp(s, "panic"))
- panic_on_oops = 1;
- return 0;
-}
-early_param("oops", oops_setup);
-
-static int __init kstack_setup(char *s)
-{
- if (!s)
- return -EINVAL;
- kstack_depth_to_print = simple_strtoul(s, NULL, 0);
- return 0;
-}
-early_param("kstack", kstack_setup);
-
-static int __init code_bytes_setup(char *s)
-{
- code_bytes = simple_strtoul(s, NULL, 0);
- if (code_bytes > 8192)
- code_bytes = 8192;
-
- return 1;
-}
-__setup("code_bytes=", code_bytes_setup);
diff --git a/arch/x86/kernel/vmlinux_64.lds.S b/arch/x86/kernel/vmlinux_64.lds.S
index 201e81a..46e0544 100644
--- a/arch/x86/kernel/vmlinux_64.lds.S
+++ b/arch/x86/kernel/vmlinux_64.lds.S
@@ -172,8 +172,8 @@ SECTIONS
.x86_cpu_dev.init : AT(ADDR(.x86_cpu_dev.init) - LOAD_OFFSET) {
*(.x86_cpu_dev.init)
}
- SECURITY_INIT
__x86_cpu_dev_end = .;
+ SECURITY_INIT
. = ALIGN(8);
.parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) {
diff --git a/arch/x86/mach-generic/es7000.c b/arch/x86/mach-generic/es7000.c
index 520cca0..6513d41 100644
--- a/arch/x86/mach-generic/es7000.c
+++ b/arch/x86/mach-generic/es7000.c
@@ -47,16 +47,26 @@ static __init int mps_oem_check(struct mp_config_table *mpc, char *oem,
/* Hook from generic ACPI tables.c */
static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
- unsigned long oem_addr;
+ unsigned long oem_addr = 0;
+ int check_dsdt;
+ int ret = 0;
+
+ /* check dsdt at first to avoid clear fix_map for oem_addr */
+ check_dsdt = es7000_check_dsdt();
+
if (!find_unisys_acpi_oem_table(&oem_addr)) {
- if (es7000_check_dsdt())
- return parse_unisys_oem((char *)oem_addr);
+ if (check_dsdt)
+ ret = parse_unisys_oem((char *)oem_addr);
else {
setup_unisys();
- return 1;
+ ret = 1;
}
+ /*
+ * we need to unmap it
+ */
+ unmap_unisys_acpi_oem_table(oem_addr);
}
- return 0;
+ return ret;
}
#else
static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
index dfb932d..59f89b4 100644
--- a/arch/x86/mm/Makefile
+++ b/arch/x86/mm/Makefile
@@ -13,12 +13,8 @@ obj-$(CONFIG_MMIOTRACE) += mmiotrace.o
mmiotrace-y := pf_in.o mmio-mod.o
obj-$(CONFIG_MMIOTRACE_TEST) += testmmiotrace.o
-ifeq ($(CONFIG_X86_32),y)
-obj-$(CONFIG_NUMA) += discontig_32.o
-else
-obj-$(CONFIG_NUMA) += numa_64.o
+obj-$(CONFIG_NUMA) += numa_$(BITS).o
obj-$(CONFIG_K8_NUMA) += k8topology_64.o
-endif
obj-$(CONFIG_ACPI_NUMA) += srat_$(BITS).o
obj-$(CONFIG_MEMTEST) += memtest.o
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 8f92cac..3f2b896 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -592,11 +592,6 @@ void __kprobes do_page_fault(struct pt_regs *regs, unsigned long error_code)
unsigned long flags;
#endif
- /*
- * We can fault from pretty much anywhere, with unknown IRQ state.
- */
- trace_hardirqs_fixup();
-
tsk = current;
mm = tsk->mm;
prefetchw(&mm->mmap_sem);
@@ -914,15 +909,15 @@ LIST_HEAD(pgd_list);
void vmalloc_sync_all(void)
{
-#ifdef CONFIG_X86_32
- unsigned long start = VMALLOC_START & PGDIR_MASK;
unsigned long address;
+#ifdef CONFIG_X86_32
if (SHARED_KERNEL_PMD)
return;
- BUILD_BUG_ON(TASK_SIZE & ~PGDIR_MASK);
- for (address = start; address >= TASK_SIZE; address += PGDIR_SIZE) {
+ for (address = VMALLOC_START & PMD_MASK;
+ address >= TASK_SIZE && address < FIXADDR_TOP;
+ address += PMD_SIZE) {
unsigned long flags;
struct page *page;
@@ -935,10 +930,8 @@ void vmalloc_sync_all(void)
spin_unlock_irqrestore(&pgd_lock, flags);
}
#else /* CONFIG_X86_64 */
- unsigned long start = VMALLOC_START & PGDIR_MASK;
- unsigned long address;
-
- for (address = start; address <= VMALLOC_END; address += PGDIR_SIZE) {
+ for (address = VMALLOC_START & PGDIR_MASK; address <= VMALLOC_END;
+ address += PGDIR_SIZE) {
const pgd_t *pgd_ref = pgd_offset_k(address);
unsigned long flags;
struct page *page;
diff --git a/arch/x86/mm/gup.c b/arch/x86/mm/gup.c
index 007bb06..4ba373c 100644
--- a/arch/x86/mm/gup.c
+++ b/arch/x86/mm/gup.c
@@ -82,7 +82,7 @@ static noinline int gup_pte_range(pmd_t pmd, unsigned long addr,
pte_t pte = gup_get_pte(ptep);
struct page *page;
- if ((pte_val(pte) & (mask | _PAGE_SPECIAL)) != mask) {
+ if ((pte_flags(pte) & (mask | _PAGE_SPECIAL)) != mask) {
pte_unmap(ptep);
return 0;
}
@@ -116,10 +116,10 @@ static noinline int gup_huge_pmd(pmd_t pmd, unsigned long addr,
mask = _PAGE_PRESENT|_PAGE_USER;
if (write)
mask |= _PAGE_RW;
- if ((pte_val(pte) & mask) != mask)
+ if ((pte_flags(pte) & mask) != mask)
return 0;
/* hugepages are never "special" */
- VM_BUG_ON(pte_val(pte) & _PAGE_SPECIAL);
+ VM_BUG_ON(pte_flags(pte) & _PAGE_SPECIAL);
VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
refs = 0;
@@ -173,10 +173,10 @@ static noinline int gup_huge_pud(pud_t pud, unsigned long addr,
mask = _PAGE_PRESENT|_PAGE_USER;
if (write)
mask |= _PAGE_RW;
- if ((pte_val(pte) & mask) != mask)
+ if ((pte_flags(pte) & mask) != mask)
return 0;
/* hugepages are never "special" */
- VM_BUG_ON(pte_val(pte) & _PAGE_SPECIAL);
+ VM_BUG_ON(pte_flags(pte) & _PAGE_SPECIAL);
VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
refs = 0;
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index c3789bb..c67d78d 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -557,7 +557,7 @@ void zap_low_mappings(void)
int nx_enabled;
-pteval_t __supported_pte_mask __read_mostly = ~(_PAGE_NX | _PAGE_GLOBAL);
+pteval_t __supported_pte_mask __read_mostly = ~(_PAGE_NX | _PAGE_GLOBAL | _PAGE_IOMAP);
EXPORT_SYMBOL_GPL(__supported_pte_mask);
#ifdef CONFIG_X86_PAE
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 365eaea..747f6c9 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -88,7 +88,7 @@ early_param("gbpages", parse_direct_gbpages_on);
int after_bootmem;
-unsigned long __supported_pte_mask __read_mostly = ~0UL;
+pteval_t __supported_pte_mask __read_mostly = ~_PAGE_IOMAP;
EXPORT_SYMBOL_GPL(__supported_pte_mask);
static int do_not_nx __cpuinitdata;
@@ -195,9 +195,6 @@ set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte)
}
pte = pte_offset_kernel(pmd, vaddr);
- if (!pte_none(*pte) && pte_val(new_pte) &&
- pte_val(*pte) != (pte_val(new_pte) & __supported_pte_mask))
- pte_ERROR(*pte);
set_pte(pte, new_pte);
/*
@@ -312,7 +309,7 @@ static __ref void *alloc_low_page(unsigned long *phys)
if (pfn >= table_top)
panic("alloc_low_page: ran out of memory");
- adr = early_ioremap(pfn * PAGE_SIZE, PAGE_SIZE);
+ adr = early_memremap(pfn * PAGE_SIZE, PAGE_SIZE);
memset(adr, 0, PAGE_SIZE);
*phys = pfn * PAGE_SIZE;
return adr;
@@ -775,7 +772,7 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
old_start = mr[i].start;
memmove(&mr[i], &mr[i+1],
(nr_range - 1 - i) * sizeof (struct map_range));
- mr[i].start = old_start;
+ mr[i--].start = old_start;
nr_range--;
}
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 6ab3196..ddb3751 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -24,18 +24,47 @@
#ifdef CONFIG_X86_64
+static inline int phys_addr_valid(unsigned long addr)
+{
+ return addr < (1UL << boot_cpu_data.x86_phys_bits);
+}
+
unsigned long __phys_addr(unsigned long x)
{
- if (x >= __START_KERNEL_map)
- return x - __START_KERNEL_map + phys_base;
- return x - PAGE_OFFSET;
+ if (x >= __START_KERNEL_map) {
+ x -= __START_KERNEL_map;
+ VIRTUAL_BUG_ON(x >= KERNEL_IMAGE_SIZE);
+ x += phys_base;
+ } else {
+ VIRTUAL_BUG_ON(x < PAGE_OFFSET);
+ x -= PAGE_OFFSET;
+ VIRTUAL_BUG_ON(system_state == SYSTEM_BOOTING ? x > MAXMEM :
+ !phys_addr_valid(x));
+ }
+ return x;
}
EXPORT_SYMBOL(__phys_addr);
-static inline int phys_addr_valid(unsigned long addr)
+bool __virt_addr_valid(unsigned long x)
{
- return addr < (1UL << boot_cpu_data.x86_phys_bits);
+ if (x >= __START_KERNEL_map) {
+ x -= __START_KERNEL_map;
+ if (x >= KERNEL_IMAGE_SIZE)
+ return false;
+ x += phys_base;
+ } else {
+ if (x < PAGE_OFFSET)
+ return false;
+ x -= PAGE_OFFSET;
+ if (system_state == SYSTEM_BOOTING ?
+ x > MAXMEM : !phys_addr_valid(x)) {
+ return false;
+ }
+ }
+
+ return pfn_valid(x >> PAGE_SHIFT);
}
+EXPORT_SYMBOL(__virt_addr_valid);
#else
@@ -44,6 +73,28 @@ static inline int phys_addr_valid(unsigned long addr)
return 1;
}
+#ifdef CONFIG_DEBUG_VIRTUAL
+unsigned long __phys_addr(unsigned long x)
+{
+ /* VMALLOC_* aren't constants; not available at the boot time */
+ VIRTUAL_BUG_ON(x < PAGE_OFFSET);
+ VIRTUAL_BUG_ON(system_state != SYSTEM_BOOTING &&
+ is_vmalloc_addr((void *) x));
+ return x - PAGE_OFFSET;
+}
+EXPORT_SYMBOL(__phys_addr);
+#endif
+
+bool __virt_addr_valid(unsigned long x)
+{
+ if (x < PAGE_OFFSET)
+ return false;
+ if (system_state != SYSTEM_BOOTING && is_vmalloc_addr((void *) x))
+ return false;
+ return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT);
+}
+EXPORT_SYMBOL(__virt_addr_valid);
+
#endif
int page_is_ram(unsigned long pagenr)
@@ -223,16 +274,16 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr,
switch (prot_val) {
case _PAGE_CACHE_UC:
default:
- prot = PAGE_KERNEL_NOCACHE;
+ prot = PAGE_KERNEL_IO_NOCACHE;
break;
case _PAGE_CACHE_UC_MINUS:
- prot = PAGE_KERNEL_UC_MINUS;
+ prot = PAGE_KERNEL_IO_UC_MINUS;
break;
case _PAGE_CACHE_WC:
- prot = PAGE_KERNEL_WC;
+ prot = PAGE_KERNEL_IO_WC;
break;
case _PAGE_CACHE_WB:
- prot = PAGE_KERNEL;
+ prot = PAGE_KERNEL_IO;
break;
}
@@ -549,12 +600,12 @@ static void __init __early_set_fixmap(enum fixed_addresses idx,
}
static inline void __init early_set_fixmap(enum fixed_addresses idx,
- unsigned long phys)
+ unsigned long phys, pgprot_t prot)
{
if (after_paging_init)
- set_fixmap(idx, phys);
+ __set_fixmap(idx, phys, prot);
else
- __early_set_fixmap(idx, phys, PAGE_KERNEL);
+ __early_set_fixmap(idx, phys, prot);
}
static inline void __init early_clear_fixmap(enum fixed_addresses idx)
@@ -565,16 +616,22 @@ static inline void __init early_clear_fixmap(enum fixed_addresses idx)
__early_set_fixmap(idx, 0, __pgprot(0));
}
-
-static int __initdata early_ioremap_nested;
-
+static void *prev_map[FIX_BTMAPS_SLOTS] __initdata;
+static unsigned long prev_size[FIX_BTMAPS_SLOTS] __initdata;
static int __init check_early_ioremap_leak(void)
{
- if (!early_ioremap_nested)
+ int count = 0;
+ int i;
+
+ for (i = 0; i < FIX_BTMAPS_SLOTS; i++)
+ if (prev_map[i])
+ count++;
+
+ if (!count)
return 0;
WARN(1, KERN_WARNING
"Debug warning: early ioremap leak of %d areas detected.\n",
- early_ioremap_nested);
+ count);
printk(KERN_WARNING
"please boot with early_ioremap_debug and report the dmesg.\n");
@@ -582,18 +639,33 @@ static int __init check_early_ioremap_leak(void)
}
late_initcall(check_early_ioremap_leak);
-void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
+static void __init *__early_ioremap(unsigned long phys_addr, unsigned long size, pgprot_t prot)
{
unsigned long offset, last_addr;
- unsigned int nrpages, nesting;
+ unsigned int nrpages;
enum fixed_addresses idx0, idx;
+ int i, slot;
WARN_ON(system_state != SYSTEM_BOOTING);
- nesting = early_ioremap_nested;
+ slot = -1;
+ for (i = 0; i < FIX_BTMAPS_SLOTS; i++) {
+ if (!prev_map[i]) {
+ slot = i;
+ break;
+ }
+ }
+
+ if (slot < 0) {
+ printk(KERN_INFO "early_iomap(%08lx, %08lx) not found slot\n",
+ phys_addr, size);
+ WARN_ON(1);
+ return NULL;
+ }
+
if (early_ioremap_debug) {
printk(KERN_INFO "early_ioremap(%08lx, %08lx) [%d] => ",
- phys_addr, size, nesting);
+ phys_addr, size, slot);
dump_stack();
}
@@ -604,11 +676,7 @@ void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
return NULL;
}
- if (nesting >= FIX_BTMAPS_NESTING) {
- WARN_ON(1);
- return NULL;
- }
- early_ioremap_nested++;
+ prev_size[slot] = size;
/*
* Mappings have to be page-aligned
*/
@@ -628,10 +696,10 @@ void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
/*
* Ok, go for it..
*/
- idx0 = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*nesting;
+ idx0 = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*slot;
idx = idx0;
while (nrpages > 0) {
- early_set_fixmap(idx, phys_addr);
+ early_set_fixmap(idx, phys_addr, prot);
phys_addr += PAGE_SIZE;
--idx;
--nrpages;
@@ -639,7 +707,20 @@ void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
if (early_ioremap_debug)
printk(KERN_CONT "%08lx + %08lx\n", offset, fix_to_virt(idx0));
- return (void *) (offset + fix_to_virt(idx0));
+ prev_map[slot] = (void *) (offset + fix_to_virt(idx0));
+ return prev_map[slot];
+}
+
+/* Remap an IO device */
+void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
+{
+ return __early_ioremap(phys_addr, size, PAGE_KERNEL_IO);
+}
+
+/* Remap memory */
+void __init *early_memremap(unsigned long phys_addr, unsigned long size)
+{
+ return __early_ioremap(phys_addr, size, PAGE_KERNEL);
}
void __init early_iounmap(void *addr, unsigned long size)
@@ -648,15 +729,33 @@ void __init early_iounmap(void *addr, unsigned long size)
unsigned long offset;
unsigned int nrpages;
enum fixed_addresses idx;
- int nesting;
+ int i, slot;
+
+ slot = -1;
+ for (i = 0; i < FIX_BTMAPS_SLOTS; i++) {
+ if (prev_map[i] == addr) {
+ slot = i;
+ break;
+ }
+ }
- nesting = --early_ioremap_nested;
- if (WARN_ON(nesting < 0))
+ if (slot < 0) {
+ printk(KERN_INFO "early_iounmap(%p, %08lx) not found slot\n",
+ addr, size);
+ WARN_ON(1);
return;
+ }
+
+ if (prev_size[slot] != size) {
+ printk(KERN_INFO "early_iounmap(%p, %08lx) [%d] size not consistent %08lx\n",
+ addr, size, slot, prev_size[slot]);
+ WARN_ON(1);
+ return;
+ }
if (early_ioremap_debug) {
printk(KERN_INFO "early_iounmap(%p, %08lx) [%d]\n", addr,
- size, nesting);
+ size, slot);
dump_stack();
}
@@ -668,12 +767,13 @@ void __init early_iounmap(void *addr, unsigned long size)
offset = virt_addr & ~PAGE_MASK;
nrpages = PAGE_ALIGN(offset + size - 1) >> PAGE_SHIFT;
- idx = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*nesting;
+ idx = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*slot;
while (nrpages > 0) {
early_clear_fixmap(idx);
--idx;
--nrpages;
}
+ prev_map[slot] = 0;
}
void __this_fixmap_does_not_exist(void)
diff --git a/arch/x86/mm/discontig_32.c b/arch/x86/mm/numa_32.c
similarity index 100%
rename from arch/x86/mm/discontig_32.c
rename to arch/x86/mm/numa_32.c
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index 3815e42..d3e6846 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -27,4 +27,12 @@ config XEN_MAX_DOMAIN_MEMORY
config XEN_SAVE_RESTORE
bool
depends on PM
- default y
\ No newline at end of file
+ default y
+
+config XEN_DEBUG_FS
+ bool "Enable Xen debug and tuning parameters in debugfs"
+ depends on XEN && DEBUG_FS
+ default n
+ help
+ Enable statistics output and various tuning options in debugfs.
+ Enabling this option may incur a significant performance overhead.
\ No newline at end of file
diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
index 59c1e53..3139479 100644
--- a/arch/x86/xen/Makefile
+++ b/arch/x86/xen/Makefile
@@ -1,4 +1,12 @@
-obj-y := enlighten.o setup.o multicalls.o mmu.o \
+ifdef CONFIG_FTRACE
+# Do not profile debug and lowlevel utilities
+CFLAGS_REMOVE_spinlock.o = -pg
+CFLAGS_REMOVE_time.o = -pg
+CFLAGS_REMOVE_irq.o = -pg
+endif
+
+obj-y := enlighten.o setup.o multicalls.o mmu.o irq.o \
time.o xen-asm_$(BITS).o grant-table.o suspend.o
-obj-$(CONFIG_SMP) += smp.o
+obj-$(CONFIG_SMP) += smp.o spinlock.o
+obj-$(CONFIG_XEN_DEBUG_FS) += debugfs.o
\ No newline at end of file
diff --git a/arch/x86/xen/debugfs.c b/arch/x86/xen/debugfs.c
new file mode 100644
index 0000000..b53225d
--- /dev/null
+++ b/arch/x86/xen/debugfs.c
@@ -0,0 +1,123 @@
+#include <linux/init.h>
+#include <linux/debugfs.h>
+#include <linux/module.h>
+
+#include "debugfs.h"
+
+static struct dentry *d_xen_debug;
+
+struct dentry * __init xen_init_debugfs(void)
+{
+ if (!d_xen_debug) {
+ d_xen_debug = debugfs_create_dir("xen", NULL);
+
+ if (!d_xen_debug)
+ pr_warning("Could not create 'xen' debugfs directory\n");
+ }
+
+ return d_xen_debug;
+}
+
+struct array_data
+{
+ void *array;
+ unsigned elements;
+};
+
+static int u32_array_open(struct inode *inode, struct file *file)
+{
+ file->private_data = NULL;
+ return nonseekable_open(inode, file);
+}
+
+static size_t format_array(char *buf, size_t bufsize, const char *fmt,
+ u32 *array, unsigned array_size)
+{
+ size_t ret = 0;
+ unsigned i;
+
+ for(i = 0; i < array_size; i++) {
+ size_t len;
+
+ len = snprintf(buf, bufsize, fmt, array[i]);
+ len++; /* ' ' or '\n' */
+ ret += len;
+
+ if (buf) {
+ buf += len;
+ bufsize -= len;
+ buf[-1] = (i == array_size-1) ? '\n' : ' ';
+ }
+ }
+
+ ret++; /* \0 */
+ if (buf)
+ *buf = '\0';
+
+ return ret;
+}
+
+static char *format_array_alloc(const char *fmt, u32 *array, unsigned array_size)
+{
+ size_t len = format_array(NULL, 0, fmt, array, array_size);
+ char *ret;
+
+ ret = kmalloc(len, GFP_KERNEL);
+ if (ret == NULL)
+ return NULL;
+
+ format_array(ret, len, fmt, array, array_size);
+ return ret;
+}
+
+static ssize_t u32_array_read(struct file *file, char __user *buf, size_t len,
+ loff_t *ppos)
+{
+ struct inode *inode = file->f_path.dentry->d_inode;
+ struct array_data *data = inode->i_private;
+ size_t size;
+
+ if (*ppos == 0) {
+ if (file->private_data) {
+ kfree(file->private_data);
+ file->private_data = NULL;
+ }
+
+ file->private_data = format_array_alloc("%u", data->array, data->elements);
+ }
+
+ size = 0;
+ if (file->private_data)
+ size = strlen(file->private_data);
+
+ return simple_read_from_buffer(buf, len, ppos, file->private_data, size);
+}
+
+static int xen_array_release(struct inode *inode, struct file *file)
+{
+ kfree(file->private_data);
+
+ return 0;
+}
+
+static struct file_operations u32_array_fops = {
+ .owner = THIS_MODULE,
+ .open = u32_array_open,
+ .release= xen_array_release,
+ .read = u32_array_read,
+};
+
+struct dentry *xen_debugfs_create_u32_array(const char *name, mode_t mode,
+ struct dentry *parent,
+ u32 *array, unsigned elements)
+{
+ struct array_data *data = kmalloc(sizeof(*data), GFP_KERNEL);
+
+ if (data == NULL)
+ return NULL;
+
+ data->array = array;
+ data->elements = elements;
+
+ return debugfs_create_file(name, mode, parent, data, &u32_array_fops);
+}
diff --git a/arch/x86/xen/debugfs.h b/arch/x86/xen/debugfs.h
new file mode 100644
index 0000000..e281320
--- /dev/null
+++ b/arch/x86/xen/debugfs.h
@@ -0,0 +1,10 @@
+#ifndef _XEN_DEBUGFS_H
+#define _XEN_DEBUGFS_H
+
+struct dentry * __init xen_init_debugfs(void);
+
+struct dentry *xen_debugfs_create_u32_array(const char *name, mode_t mode,
+ struct dentry *parent,
+ u32 *array, unsigned elements);
+
+#endif /* _XEN_DEBUGFS_H */
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index a27d562..708b8ea 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -30,7 +30,6 @@
#include <xen/interface/xen.h>
#include <xen/interface/physdev.h>
#include <xen/interface/vcpu.h>
-#include <xen/interface/sched.h>
#include <xen/features.h>
#include <xen/page.h>
#include <xen/hvc-console.h>
@@ -58,6 +57,9 @@ EXPORT_SYMBOL_GPL(hypercall_page);
DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu);
DEFINE_PER_CPU(struct vcpu_info, xen_vcpu_info);
+enum xen_domain_type xen_domain_type = XEN_NATIVE;
+EXPORT_SYMBOL_GPL(xen_domain_type);
+
/*
* Identity map, in addition to plain kernel map. This needs to be
* large enough to allocate page table pages to allocate the rest.
@@ -227,103 +229,68 @@ static unsigned long xen_get_debugreg(int reg)
return HYPERVISOR_get_debugreg(reg);
}
-static unsigned long xen_save_fl(void)
+static void xen_leave_lazy(void)
{
- struct vcpu_info *vcpu;
- unsigned long flags;
-
- vcpu = x86_read_percpu(xen_vcpu);
-
- /* flag has opposite sense of mask */
- flags = !vcpu->evtchn_upcall_mask;
-
- /* convert to IF type flag
- -0 -> 0x00000000
- -1 -> 0xffffffff
- */
- return (-flags) & X86_EFLAGS_IF;
+ paravirt_leave_lazy(paravirt_get_lazy_mode());
+ xen_mc_flush();
}
-static void xen_restore_fl(unsigned long flags)
+static unsigned long xen_store_tr(void)
{
- struct vcpu_info *vcpu;
-
- /* convert from IF type flag */
- flags = !(flags & X86_EFLAGS_IF);
-
- /* There's a one instruction preempt window here. We need to
- make sure we're don't switch CPUs between getting the vcpu
- pointer and updating the mask. */
- preempt_disable();
- vcpu = x86_read_percpu(xen_vcpu);
- vcpu->evtchn_upcall_mask = flags;
- preempt_enable_no_resched();
-
- /* Doesn't matter if we get preempted here, because any
- pending event will get dealt with anyway. */
-
- if (flags == 0) {
- preempt_check_resched();
- barrier(); /* unmask then check (avoid races) */
- if (unlikely(vcpu->evtchn_upcall_pending))
- force_evtchn_callback();
- }
+ return 0;
}
-static void xen_irq_disable(void)
+/*
+ * Set the page permissions for a particular virtual address. If the
+ * address is a vmalloc mapping (or other non-linear mapping), then
+ * find the linear mapping of the page and also set its protections to
+ * match.
+ */
+static void set_aliased_prot(void *v, pgprot_t prot)
{
- /* There's a one instruction preempt window here. We need to
- make sure we're don't switch CPUs between getting the vcpu
- pointer and updating the mask. */
- preempt_disable();
- x86_read_percpu(xen_vcpu)->evtchn_upcall_mask = 1;
- preempt_enable_no_resched();
-}
+ int level;
+ pte_t *ptep;
+ pte_t pte;
+ unsigned long pfn;
+ struct page *page;
-static void xen_irq_enable(void)
-{
- struct vcpu_info *vcpu;
+ ptep = lookup_address((unsigned long)v, &level);
+ BUG_ON(ptep == NULL);
- /* We don't need to worry about being preempted here, since
- either a) interrupts are disabled, so no preemption, or b)
- the caller is confused and is trying to re-enable interrupts
- on an indeterminate processor. */
+ pfn = pte_pfn(*ptep);
+ page = pfn_to_page(pfn);
- vcpu = x86_read_percpu(xen_vcpu);
- vcpu->evtchn_upcall_mask = 0;
+ pte = pfn_pte(pfn, prot);
- /* Doesn't matter if we get preempted here, because any
- pending event will get dealt with anyway. */
+ if (HYPERVISOR_update_va_mapping((unsigned long)v, pte, 0))
+ BUG();
- barrier(); /* unmask then check (avoid races) */
- if (unlikely(vcpu->evtchn_upcall_pending))
- force_evtchn_callback();
-}
+ if (!PageHighMem(page)) {
+ void *av = __va(PFN_PHYS(pfn));
-static void xen_safe_halt(void)
-{
- /* Blocking includes an implicit local_irq_enable(). */
- if (HYPERVISOR_sched_op(SCHEDOP_block, NULL) != 0)
- BUG();
+ if (av != v)
+ if (HYPERVISOR_update_va_mapping((unsigned long)av, pte, 0))
+ BUG();
+ } else
+ kmap_flush_unused();
}
-static void xen_halt(void)
+static void xen_alloc_ldt(struct desc_struct *ldt, unsigned entries)
{
- if (irqs_disabled())
- HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
- else
- xen_safe_halt();
-}
+ const unsigned entries_per_page = PAGE_SIZE / LDT_ENTRY_SIZE;
+ int i;
-static void xen_leave_lazy(void)
-{
- paravirt_leave_lazy(paravirt_get_lazy_mode());
- xen_mc_flush();
+ for(i = 0; i < entries; i += entries_per_page)
+ set_aliased_prot(ldt + i, PAGE_KERNEL_RO);
}
-static unsigned long xen_store_tr(void)
+static void xen_free_ldt(struct desc_struct *ldt, unsigned entries)
{
- return 0;
+ const unsigned entries_per_page = PAGE_SIZE / LDT_ENTRY_SIZE;
+ int i;
+
+ for(i = 0; i < entries; i += entries_per_page)
+ set_aliased_prot(ldt + i, PAGE_KERNEL);
}
static void xen_set_ldt(const void *addr, unsigned entries)
@@ -426,8 +393,7 @@ static void xen_load_gs_index(unsigned int idx)
static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
const void *ptr)
{
- unsigned long lp = (unsigned long)&dt[entrynum];
- xmaddr_t mach_lp = virt_to_machine(lp);
+ xmaddr_t mach_lp = arbitrary_virt_to_machine(&dt[entrynum]);
u64 entry = *(u64 *)ptr;
preempt_disable();
@@ -560,7 +526,7 @@ static void xen_write_gdt_entry(struct desc_struct *dt, int entry,
}
static void xen_load_sp0(struct tss_struct *tss,
- struct thread_struct *thread)
+ struct thread_struct *thread)
{
struct multicall_space mcs = xen_mc_entry(0);
MULTI_stack_switch(mcs.mc, __KERNEL_DS, thread->sp0);
@@ -835,6 +801,19 @@ static int xen_write_msr_safe(unsigned int msr, unsigned low, unsigned high)
ret = -EFAULT;
break;
#endif
+
+ case MSR_STAR:
+ case MSR_CSTAR:
+ case MSR_LSTAR:
+ case MSR_SYSCALL_MASK:
+ case MSR_IA32_SYSENTER_CS:
+ case MSR_IA32_SYSENTER_ESP:
+ case MSR_IA32_SYSENTER_EIP:
+ /* Fast syscall setup is all done in hypercalls, so
+ these are all ignored. Stub them out here to stop
+ Xen console noise. */
+ break;
+
default:
ret = native_write_msr_safe(msr, low, high);
}
@@ -878,8 +857,8 @@ static void xen_alloc_ptpage(struct mm_struct *mm, unsigned long pfn, unsigned l
SetPagePinned(page);
if (!PageHighMem(page)) {
- make_lowmem_page_readonly(__va(PFN_PHYS(pfn)));
- if (level == PT_PTE)
+ make_lowmem_page_readonly(__va(PFN_PHYS((unsigned long)pfn)));
+ if (level == PT_PTE && USE_SPLIT_PTLOCKS)
pin_pagetable_pfn(MMUEXT_PIN_L1_TABLE, pfn);
} else
/* make sure there are no stray mappings of
@@ -947,7 +926,7 @@ static void xen_release_ptpage(unsigned long pfn, unsigned level)
if (PagePinned(page)) {
if (!PageHighMem(page)) {
- if (level == PT_PTE)
+ if (level == PT_PTE && USE_SPLIT_PTLOCKS)
pin_pagetable_pfn(MMUEXT_UNPIN_TABLE, pfn);
make_lowmem_page_readwrite(__va(PFN_PHYS(pfn)));
}
@@ -1252,6 +1231,9 @@ static const struct pv_cpu_ops xen_cpu_ops __initdata = {
.load_gs_index = xen_load_gs_index,
#endif
+ .alloc_ldt = xen_alloc_ldt,
+ .free_ldt = xen_free_ldt,
+
.store_gdt = native_store_gdt,
.store_idt = native_store_idt,
.store_tr = xen_store_tr,
@@ -1273,36 +1255,6 @@ static const struct pv_cpu_ops xen_cpu_ops __initdata = {
},
};
-static void __init __xen_init_IRQ(void)
-{
-#ifdef CONFIG_X86_64
- int i;
-
- /* Create identity vector->irq map */
- for(i = 0; i < NR_VECTORS; i++) {
- int cpu;
-
- for_each_possible_cpu(cpu)
- per_cpu(vector_irq, cpu)[i] = i;
- }
-#endif /* CONFIG_X86_64 */
-
- xen_init_IRQ();
-}
-
-static const struct pv_irq_ops xen_irq_ops __initdata = {
- .init_IRQ = __xen_init_IRQ,
- .save_fl = xen_save_fl,
- .restore_fl = xen_restore_fl,
- .irq_disable = xen_irq_disable,
- .irq_enable = xen_irq_enable,
- .safe_halt = xen_safe_halt,
- .halt = xen_halt,
-#ifdef CONFIG_X86_64
- .adjust_exception_frame = xen_adjust_exception_frame,
-#endif
-};
-
static const struct pv_apic_ops xen_apic_ops __initdata = {
#ifdef CONFIG_X86_LOCAL_APIC
.setup_boot_clock = paravirt_nop,
@@ -1694,6 +1646,8 @@ asmlinkage void __init xen_start_kernel(void)
if (!xen_start_info)
return;
+ xen_domain_type = XEN_PV_DOMAIN;
+
BUG_ON(memcmp(xen_start_info->magic, "xen-3", 5) != 0);
xen_setup_features();
@@ -1703,10 +1657,11 @@ asmlinkage void __init xen_start_kernel(void)
pv_init_ops = xen_init_ops;
pv_time_ops = xen_time_ops;
pv_cpu_ops = xen_cpu_ops;
- pv_irq_ops = xen_irq_ops;
pv_apic_ops = xen_apic_ops;
pv_mmu_ops = xen_mmu_ops;
+ xen_init_irq_ops();
+
#ifdef CONFIG_X86_LOCAL_APIC
/*
* set up the basic apic ops.
@@ -1737,7 +1692,7 @@ asmlinkage void __init xen_start_kernel(void)
/* Prevent unwanted bits from being set in PTEs. */
__supported_pte_mask &= ~_PAGE_GLOBAL;
- if (!is_initial_xendomain())
+ if (!xen_initial_domain())
__supported_pte_mask &= ~(_PAGE_PWT | _PAGE_PCD);
/* Don't do the full vcpu_info placement stuff until we have a
@@ -1772,7 +1727,7 @@ asmlinkage void __init xen_start_kernel(void)
boot_params.hdr.ramdisk_size = xen_start_info->mod_len;
boot_params.hdr.cmd_line_ptr = __pa(xen_start_info->cmd_line);
- if (!is_initial_xendomain()) {
+ if (!xen_initial_domain()) {
add_preferred_console("xenboot", 0, NULL);
add_preferred_console("tty", 0, NULL);
add_preferred_console("hvc", 0, NULL);
diff --git a/arch/x86/xen/irq.c b/arch/x86/xen/irq.c
new file mode 100644
index 0000000..28b85ab
--- /dev/null
+++ b/arch/x86/xen/irq.c
@@ -0,0 +1,143 @@
+#include <linux/hardirq.h>
+
+#include <xen/interface/xen.h>
+#include <xen/interface/sched.h>
+#include <xen/interface/vcpu.h>
+
+#include <asm/xen/hypercall.h>
+#include <asm/xen/hypervisor.h>
+
+#include "xen-ops.h"
+
+/*
+ * Force a proper event-channel callback from Xen after clearing the
+ * callback mask. We do this in a very simple manner, by making a call
+ * down into Xen. The pending flag will be checked by Xen on return.
+ */
+void xen_force_evtchn_callback(void)
+{
+ (void)HYPERVISOR_xen_version(0, NULL);
+}
+
+static void __init __xen_init_IRQ(void)
+{
+#ifdef CONFIG_X86_64
+ int i;
+
+ /* Create identity vector->irq map */
+ for(i = 0; i < NR_VECTORS; i++) {
+ int cpu;
+
+ for_each_possible_cpu(cpu)
+ per_cpu(vector_irq, cpu)[i] = i;
+ }
+#endif /* CONFIG_X86_64 */
+
+ xen_init_IRQ();
+}
+
+static unsigned long xen_save_fl(void)
+{
+ struct vcpu_info *vcpu;
+ unsigned long flags;
+
+ vcpu = x86_read_percpu(xen_vcpu);
+
+ /* flag has opposite sense of mask */
+ flags = !vcpu->evtchn_upcall_mask;
+
+ /* convert to IF type flag
+ -0 -> 0x00000000
+ -1 -> 0xffffffff
+ */
+ return (-flags) & X86_EFLAGS_IF;
+}
+
+static void xen_restore_fl(unsigned long flags)
+{
+ struct vcpu_info *vcpu;
+
+ /* convert from IF type flag */
+ flags = !(flags & X86_EFLAGS_IF);
+
+ /* There's a one instruction preempt window here. We need to
+ make sure we're don't switch CPUs between getting the vcpu
+ pointer and updating the mask. */
+ preempt_disable();
+ vcpu = x86_read_percpu(xen_vcpu);
+ vcpu->evtchn_upcall_mask = flags;
+ preempt_enable_no_resched();
+
+ /* Doesn't matter if we get preempted here, because any
+ pending event will get dealt with anyway. */
+
+ if (flags == 0) {
+ preempt_check_resched();
+ barrier(); /* unmask then check (avoid races) */
+ if (unlikely(vcpu->evtchn_upcall_pending))
+ xen_force_evtchn_callback();
+ }
+}
+
+static void xen_irq_disable(void)
+{
+ /* There's a one instruction preempt window here. We need to
+ make sure we're don't switch CPUs between getting the vcpu
+ pointer and updating the mask. */
+ preempt_disable();
+ x86_read_percpu(xen_vcpu)->evtchn_upcall_mask = 1;
+ preempt_enable_no_resched();
+}
+
+static void xen_irq_enable(void)
+{
+ struct vcpu_info *vcpu;
+
+ /* We don't need to worry about being preempted here, since
+ either a) interrupts are disabled, so no preemption, or b)
+ the caller is confused and is trying to re-enable interrupts
+ on an indeterminate processor. */
+
+ vcpu = x86_read_percpu(xen_vcpu);
+ vcpu->evtchn_upcall_mask = 0;
+
+ /* Doesn't matter if we get preempted here, because any
+ pending event will get dealt with anyway. */
+
+ barrier(); /* unmask then check (avoid races) */
+ if (unlikely(vcpu->evtchn_upcall_pending))
+ xen_force_evtchn_callback();
+}
+
+static void xen_safe_halt(void)
+{
+ /* Blocking includes an implicit local_irq_enable(). */
+ if (HYPERVISOR_sched_op(SCHEDOP_block, NULL) != 0)
+ BUG();
+}
+
+static void xen_halt(void)
+{
+ if (irqs_disabled())
+ HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
+ else
+ xen_safe_halt();
+}
+
+static const struct pv_irq_ops xen_irq_ops __initdata = {
+ .init_IRQ = __xen_init_IRQ,
+ .save_fl = xen_save_fl,
+ .restore_fl = xen_restore_fl,
+ .irq_disable = xen_irq_disable,
+ .irq_enable = xen_irq_enable,
+ .safe_halt = xen_safe_halt,
+ .halt = xen_halt,
+#ifdef CONFIG_X86_64
+ .adjust_exception_frame = xen_adjust_exception_frame,
+#endif
+};
+
+void __init xen_init_irq_ops()
+{
+ pv_irq_ops = xen_irq_ops;
+}
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index aa37469..64e5868 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -40,6 +40,7 @@
*/
#include <linux/sched.h>
#include <linux/highmem.h>
+#include <linux/debugfs.h>
#include <linux/bug.h>
#include <asm/pgtable.h>
@@ -57,6 +58,61 @@
#include "multicalls.h"
#include "mmu.h"
+#include "debugfs.h"
+
+#define MMU_UPDATE_HISTO 30
+
+#ifdef CONFIG_XEN_DEBUG_FS
+
+static struct {
+ u32 pgd_update;
+ u32 pgd_update_pinned;
+ u32 pgd_update_batched;
+
+ u32 pud_update;
+ u32 pud_update_pinned;
+ u32 pud_update_batched;
+
+ u32 pmd_update;
+ u32 pmd_update_pinned;
+ u32 pmd_update_batched;
+
+ u32 pte_update;
+ u32 pte_update_pinned;
+ u32 pte_update_batched;
+
+ u32 mmu_update;
+ u32 mmu_update_extended;
+ u32 mmu_update_histo[MMU_UPDATE_HISTO];
+
+ u32 prot_commit;
+ u32 prot_commit_batched;
+
+ u32 set_pte_at;
+ u32 set_pte_at_batched;
+ u32 set_pte_at_pinned;
+ u32 set_pte_at_current;
+ u32 set_pte_at_kernel;
+} mmu_stats;
+
+static u8 zero_stats;
+
+static inline void check_zero(void)
+{
+ if (unlikely(zero_stats)) {
+ memset(&mmu_stats, 0, sizeof(mmu_stats));
+ zero_stats = 0;
+ }
+}
+
+#define ADD_STATS(elem, val) \
+ do { check_zero(); mmu_stats.elem += (val); } while(0)
+
+#else /* !CONFIG_XEN_DEBUG_FS */
+
+#define ADD_STATS(elem, val) do { (void)(val); } while(0)
+
+#endif /* CONFIG_XEN_DEBUG_FS */
/*
* Just beyond the highest usermode address. STACK_TOP_MAX has a
@@ -229,25 +285,35 @@ void make_lowmem_page_readwrite(void *vaddr)
}
-static bool page_pinned(void *ptr)
+static bool xen_page_pinned(void *ptr)
{
struct page *page = virt_to_page(ptr);
return PagePinned(page);
}
-static void extend_mmu_update(const struct mmu_update *update)
+static void xen_extend_mmu_update(const struct mmu_update *update)
{
struct multicall_space mcs;
struct mmu_update *u;
mcs = xen_mc_extend_args(__HYPERVISOR_mmu_update, sizeof(*u));
- if (mcs.mc != NULL)
+ if (mcs.mc != NULL) {
+ ADD_STATS(mmu_update_extended, 1);
+ ADD_STATS(mmu_update_histo[mcs.mc->args[1]], -1);
+
mcs.mc->args[1]++;
- else {
+
+ if (mcs.mc->args[1] < MMU_UPDATE_HISTO)
+ ADD_STATS(mmu_update_histo[mcs.mc->args[1]], 1);
+ else
+ ADD_STATS(mmu_update_histo[0], 1);
+ } else {
+ ADD_STATS(mmu_update, 1);
mcs = __xen_mc_entry(sizeof(*u));
MULTI_mmu_update(mcs.mc, mcs.args, 1, NULL, DOMID_SELF);
+ ADD_STATS(mmu_update_histo[1], 1);
}
u = mcs.args;
@@ -265,7 +331,9 @@ void xen_set_pmd_hyper(pmd_t *ptr, pmd_t val)
/* ptr may be ioremapped for 64-bit pagetable setup */
u.ptr = arbitrary_virt_to_machine(ptr).maddr;
u.val = pmd_val_ma(val);
- extend_mmu_update(&u);
+ xen_extend_mmu_update(&u);
+
+ ADD_STATS(pmd_update_batched, paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU);
xen_mc_issue(PARAVIRT_LAZY_MMU);
@@ -274,13 +342,17 @@ void xen_set_pmd_hyper(pmd_t *ptr, pmd_t val)
void xen_set_pmd(pmd_t *ptr, pmd_t val)
{
+ ADD_STATS(pmd_update, 1);
+
/* If page is not pinned, we can just update the entry
directly */
- if (!page_pinned(ptr)) {
+ if (!xen_page_pinned(ptr)) {
*ptr = val;
return;
}
+ ADD_STATS(pmd_update_pinned, 1);
+
xen_set_pmd_hyper(ptr, val);
}
@@ -300,12 +372,18 @@ void xen_set_pte_at(struct mm_struct *mm, unsigned long addr,
if (mm == &init_mm)
preempt_disable();
+ ADD_STATS(set_pte_at, 1);
+// ADD_STATS(set_pte_at_pinned, xen_page_pinned(ptep));
+ ADD_STATS(set_pte_at_current, mm == current->mm);
+ ADD_STATS(set_pte_at_kernel, mm == &init_mm);
+
if (mm == current->mm || mm == &init_mm) {
if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU) {
struct multicall_space mcs;
mcs = xen_mc_entry(0);
MULTI_update_va_mapping(mcs.mc, addr, pteval, 0);
+ ADD_STATS(set_pte_at_batched, 1);
xen_mc_issue(PARAVIRT_LAZY_MMU);
goto out;
} else
@@ -334,7 +412,10 @@ void xen_ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr,
u.ptr = virt_to_machine(ptep).maddr | MMU_PT_UPDATE_PRESERVE_AD;
u.val = pte_val_ma(pte);
- extend_mmu_update(&u);
+ xen_extend_mmu_update(&u);
+
+ ADD_STATS(prot_commit, 1);
+ ADD_STATS(prot_commit_batched, paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU);
xen_mc_issue(PARAVIRT_LAZY_MMU);
}
@@ -400,7 +481,9 @@ void xen_set_pud_hyper(pud_t *ptr, pud_t val)
/* ptr may be ioremapped for 64-bit pagetable setup */
u.ptr = arbitrary_virt_to_machine(ptr).maddr;
u.val = pud_val_ma(val);
- extend_mmu_update(&u);
+ xen_extend_mmu_update(&u);
+
+ ADD_STATS(pud_update_batched, paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU);
xen_mc_issue(PARAVIRT_LAZY_MMU);
@@ -409,18 +492,26 @@ void xen_set_pud_hyper(pud_t *ptr, pud_t val)
void xen_set_pud(pud_t *ptr, pud_t val)
{
+ ADD_STATS(pud_update, 1);
+
/* If page is not pinned, we can just update the entry
directly */
- if (!page_pinned(ptr)) {
+ if (!xen_page_pinned(ptr)) {
*ptr = val;
return;
}
+ ADD_STATS(pud_update_pinned, 1);
+
xen_set_pud_hyper(ptr, val);
}
void xen_set_pte(pte_t *ptep, pte_t pte)
{
+ ADD_STATS(pte_update, 1);
+// ADD_STATS(pte_update_pinned, xen_page_pinned(ptep));
+ ADD_STATS(pte_update_batched, paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU);
+
#ifdef CONFIG_X86_PAE
ptep->pte_high = pte.pte_high;
smp_wmb();
@@ -490,7 +581,7 @@ static void __xen_set_pgd_hyper(pgd_t *ptr, pgd_t val)
u.ptr = virt_to_machine(ptr).maddr;
u.val = pgd_val_ma(val);
- extend_mmu_update(&u);
+ xen_extend_mmu_update(&u);
}
/*
@@ -517,17 +608,22 @@ void xen_set_pgd(pgd_t *ptr, pgd_t val)
{
pgd_t *user_ptr = xen_get_user_pgd(ptr);
+ ADD_STATS(pgd_update, 1);
+
/* If page is not pinned, we can just update the entry
directly */
- if (!page_pinned(ptr)) {
+ if (!xen_page_pinned(ptr)) {
*ptr = val;
if (user_ptr) {
- WARN_ON(page_pinned(user_ptr));
+ WARN_ON(xen_page_pinned(user_ptr));
*user_ptr = val;
}
return;
}
+ ADD_STATS(pgd_update_pinned, 1);
+ ADD_STATS(pgd_update_batched, paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU);
+
/* If it's pinned, then we can at least batch the kernel and
user updates together. */
xen_mc_batch();
@@ -555,8 +651,8 @@ void xen_set_pgd(pgd_t *ptr, pgd_t val)
* For 64-bit, we must skip the Xen hole in the middle of the address
* space, just after the big x86-64 virtual hole.
*/
-static int pgd_walk(pgd_t *pgd, int (*func)(struct page *, enum pt_level),
- unsigned long limit)
+static int xen_pgd_walk(pgd_t *pgd, int (*func)(struct page *, enum pt_level),
+ unsigned long limit)
{
int flush = 0;
unsigned hole_low, hole_high;
@@ -590,8 +686,6 @@ static int pgd_walk(pgd_t *pgd, int (*func)(struct page *, enum pt_level),
pmdidx_limit = 0;
#endif
- flush |= (*func)(virt_to_page(pgd), PT_PGD);
-
for (pgdidx = 0; pgdidx <= pgdidx_limit; pgdidx++) {
pud_t *pud;
@@ -637,16 +731,22 @@ static int pgd_walk(pgd_t *pgd, int (*func)(struct page *, enum pt_level),
}
}
}
+
out:
+ /* Do the top level last, so that the callbacks can use it as
+ a cue to do final things like tlb flushes. */
+ flush |= (*func)(virt_to_page(pgd), PT_PGD);
return flush;
}
-static spinlock_t *lock_pte(struct page *page)
+/* If we're using split pte locks, then take the page's lock and
+ return a pointer to it. Otherwise return NULL. */
+static spinlock_t *xen_pte_lock(struct page *page)
{
spinlock_t *ptl = NULL;
-#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
+#if USE_SPLIT_PTLOCKS
ptl = __pte_lockptr(page);
spin_lock(ptl);
#endif
@@ -654,7 +754,7 @@ static spinlock_t *lock_pte(struct page *page)
return ptl;
}
-static void do_unlock(void *v)
+static void xen_pte_unlock(void *v)
{
spinlock_t *ptl = v;
spin_unlock(ptl);
@@ -672,7 +772,7 @@ static void xen_do_pin(unsigned level, unsigned long pfn)
MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF);
}
-static int pin_page(struct page *page, enum pt_level level)
+static int xen_pin_page(struct page *page, enum pt_level level)
{
unsigned pgfl = TestSetPagePinned(page);
int flush;
@@ -691,21 +791,40 @@ static int pin_page(struct page *page, enum pt_level level)
flush = 0;
+ /*
+ * We need to hold the pagetable lock between the time
+ * we make the pagetable RO and when we actually pin
+ * it. If we don't, then other users may come in and
+ * attempt to update the pagetable by writing it,
+ * which will fail because the memory is RO but not
+ * pinned, so Xen won't do the trap'n'emulate.
+ *
+ * If we're using split pte locks, we can't hold the
+ * entire pagetable's worth of locks during the
+ * traverse, because we may wrap the preempt count (8
+ * bits). The solution is to mark RO and pin each PTE
+ * page while holding the lock. This means the number
+ * of locks we end up holding is never more than a
+ * batch size (~32 entries, at present).
+ *
+ * If we're not using split pte locks, we needn't pin
+ * the PTE pages independently, because we're
+ * protected by the overall pagetable lock.
+ */
ptl = NULL;
if (level == PT_PTE)
- ptl = lock_pte(page);
+ ptl = xen_pte_lock(page);
MULTI_update_va_mapping(mcs.mc, (unsigned long)pt,
pfn_pte(pfn, PAGE_KERNEL_RO),
level == PT_PGD ? UVMF_TLB_FLUSH : 0);
- if (level == PT_PTE)
+ if (ptl) {
xen_do_pin(MMUEXT_PIN_L1_TABLE, pfn);
- if (ptl) {
/* Queue a deferred unlock for when this batch
is completed. */
- xen_mc_callback(do_unlock, ptl);
+ xen_mc_callback(xen_pte_unlock, ptl);
}
}
@@ -719,7 +838,7 @@ void xen_pgd_pin(pgd_t *pgd)
{
xen_mc_batch();
- if (pgd_walk(pgd, pin_page, USER_LIMIT)) {
+ if (xen_pgd_walk(pgd, xen_pin_page, USER_LIMIT)) {
/* re-enable interrupts for kmap_flush_unused */
xen_mc_issue(0);
kmap_flush_unused();
@@ -733,14 +852,14 @@ void xen_pgd_pin(pgd_t *pgd)
xen_do_pin(MMUEXT_PIN_L4_TABLE, PFN_DOWN(__pa(pgd)));
if (user_pgd) {
- pin_page(virt_to_page(user_pgd), PT_PGD);
+ xen_pin_page(virt_to_page(user_pgd), PT_PGD);
xen_do_pin(MMUEXT_PIN_L4_TABLE, PFN_DOWN(__pa(user_pgd)));
}
}
#else /* CONFIG_X86_32 */
#ifdef CONFIG_X86_PAE
/* Need to make sure unshared kernel PMD is pinnable */
- pin_page(virt_to_page(pgd_page(pgd[pgd_index(TASK_SIZE)])), PT_PMD);
+ xen_pin_page(virt_to_page(pgd_page(pgd[pgd_index(TASK_SIZE)])), PT_PMD);
#endif
xen_do_pin(MMUEXT_PIN_L3_TABLE, PFN_DOWN(__pa(pgd)));
#endif /* CONFIG_X86_64 */
@@ -775,7 +894,7 @@ void xen_mm_pin_all(void)
* that's before we have page structures to store the bits. So do all
* the book-keeping now.
*/
-static __init int mark_pinned(struct page *page, enum pt_level level)
+static __init int xen_mark_pinned(struct page *page, enum pt_level level)
{
SetPagePinned(page);
return 0;
@@ -783,10 +902,10 @@ static __init int mark_pinned(struct page *page, enum pt_level level)
void __init xen_mark_init_mm_pinned(void)
{
- pgd_walk(init_mm.pgd, mark_pinned, FIXADDR_TOP);
+ xen_pgd_walk(init_mm.pgd, xen_mark_pinned, FIXADDR_TOP);
}
-static int unpin_page(struct page *page, enum pt_level level)
+static int xen_unpin_page(struct page *page, enum pt_level level)
{
unsigned pgfl = TestClearPagePinned(page);
@@ -796,10 +915,18 @@ static int unpin_page(struct page *page, enum pt_level level)
spinlock_t *ptl = NULL;
struct multicall_space mcs;
+ /*
+ * Do the converse to pin_page. If we're using split
+ * pte locks, we must be holding the lock for while
+ * the pte page is unpinned but still RO to prevent
+ * concurrent updates from seeing it in this
+ * partially-pinned state.
+ */
if (level == PT_PTE) {
- ptl = lock_pte(page);
+ ptl = xen_pte_lock(page);
- xen_do_pin(MMUEXT_UNPIN_TABLE, pfn);
+ if (ptl)
+ xen_do_pin(MMUEXT_UNPIN_TABLE, pfn);
}
mcs = __xen_mc_entry(0);
@@ -810,7 +937,7 @@ static int unpin_page(struct page *page, enum pt_level level)
if (ptl) {
/* unlock when batch completed */
- xen_mc_callback(do_unlock, ptl);
+ xen_mc_callback(xen_pte_unlock, ptl);
}
}
@@ -830,17 +957,17 @@ static void xen_pgd_unpin(pgd_t *pgd)
if (user_pgd) {
xen_do_pin(MMUEXT_UNPIN_TABLE, PFN_DOWN(__pa(user_pgd)));
- unpin_page(virt_to_page(user_pgd), PT_PGD);
+ xen_unpin_page(virt_to_page(user_pgd), PT_PGD);
}
}
#endif
#ifdef CONFIG_X86_PAE
/* Need to make sure unshared kernel PMD is unpinned */
- pin_page(virt_to_page(pgd_page(pgd[pgd_index(TASK_SIZE)])), PT_PMD);
+ xen_unpin_page(virt_to_page(pgd_page(pgd[pgd_index(TASK_SIZE)])), PT_PMD);
#endif
- pgd_walk(pgd, unpin_page, USER_LIMIT);
+ xen_pgd_walk(pgd, xen_unpin_page, USER_LIMIT);
xen_mc_issue(0);
}
@@ -907,7 +1034,7 @@ static void drop_other_mm_ref(void *info)
}
}
-static void drop_mm_ref(struct mm_struct *mm)
+static void xen_drop_mm_ref(struct mm_struct *mm)
{
cpumask_t mask;
unsigned cpu;
@@ -937,7 +1064,7 @@ static void drop_mm_ref(struct mm_struct *mm)
smp_call_function_mask(mask, drop_other_mm_ref, mm, 1);
}
#else
-static void drop_mm_ref(struct mm_struct *mm)
+static void xen_drop_mm_ref(struct mm_struct *mm)
{
if (current->active_mm == mm)
load_cr3(swapper_pg_dir);
@@ -961,14 +1088,77 @@ static void drop_mm_ref(struct mm_struct *mm)
void xen_exit_mmap(struct mm_struct *mm)
{
get_cpu(); /* make sure we don't move around */
- drop_mm_ref(mm);
+ xen_drop_mm_ref(mm);
put_cpu();
spin_lock(&mm->page_table_lock);
/* pgd may not be pinned in the error exit path of execve */
- if (page_pinned(mm->pgd))
+ if (xen_page_pinned(mm->pgd))
xen_pgd_unpin(mm->pgd);
spin_unlock(&mm->page_table_lock);
}
+
+#ifdef CONFIG_XEN_DEBUG_FS
+
+static struct dentry *d_mmu_debug;
+
+static int __init xen_mmu_debugfs(void)
+{
+ struct dentry *d_xen = xen_init_debugfs();
+
+ if (d_xen == NULL)
+ return -ENOMEM;
+
+ d_mmu_debug = debugfs_create_dir("mmu", d_xen);
+
+ debugfs_create_u8("zero_stats", 0644, d_mmu_debug, &zero_stats);
+
+ debugfs_create_u32("pgd_update", 0444, d_mmu_debug, &mmu_stats.pgd_update);
+ debugfs_create_u32("pgd_update_pinned", 0444, d_mmu_debug,
+ &mmu_stats.pgd_update_pinned);
+ debugfs_create_u32("pgd_update_batched", 0444, d_mmu_debug,
+ &mmu_stats.pgd_update_pinned);
+
+ debugfs_create_u32("pud_update", 0444, d_mmu_debug, &mmu_stats.pud_update);
+ debugfs_create_u32("pud_update_pinned", 0444, d_mmu_debug,
+ &mmu_stats.pud_update_pinned);
+ debugfs_create_u32("pud_update_batched", 0444, d_mmu_debug,
+ &mmu_stats.pud_update_pinned);
+
+ debugfs_create_u32("pmd_update", 0444, d_mmu_debug, &mmu_stats.pmd_update);
+ debugfs_create_u32("pmd_update_pinned", 0444, d_mmu_debug,
+ &mmu_stats.pmd_update_pinned);
+ debugfs_create_u32("pmd_update_batched", 0444, d_mmu_debug,
+ &mmu_stats.pmd_update_pinned);
+
+ debugfs_create_u32("pte_update", 0444, d_mmu_debug, &mmu_stats.pte_update);
+// debugfs_create_u32("pte_update_pinned", 0444, d_mmu_debug,
+// &mmu_stats.pte_update_pinned);
+ debugfs_create_u32("pte_update_batched", 0444, d_mmu_debug,
+ &mmu_stats.pte_update_pinned);
+
+ debugfs_create_u32("mmu_update", 0444, d_mmu_debug, &mmu_stats.mmu_update);
+ debugfs_create_u32("mmu_update_extended", 0444, d_mmu_debug,
+ &mmu_stats.mmu_update_extended);
+ xen_debugfs_create_u32_array("mmu_update_histo", 0444, d_mmu_debug,
+ mmu_stats.mmu_update_histo, 20);
+
+ debugfs_create_u32("set_pte_at", 0444, d_mmu_debug, &mmu_stats.set_pte_at);
+ debugfs_create_u32("set_pte_at_batched", 0444, d_mmu_debug,
+ &mmu_stats.set_pte_at_batched);
+ debugfs_create_u32("set_pte_at_current", 0444, d_mmu_debug,
+ &mmu_stats.set_pte_at_current);
+ debugfs_create_u32("set_pte_at_kernel", 0444, d_mmu_debug,
+ &mmu_stats.set_pte_at_kernel);
+
+ debugfs_create_u32("prot_commit", 0444, d_mmu_debug, &mmu_stats.prot_commit);
+ debugfs_create_u32("prot_commit_batched", 0444, d_mmu_debug,
+ &mmu_stats.prot_commit_batched);
+
+ return 0;
+}
+fs_initcall(xen_mmu_debugfs);
+
+#endif /* CONFIG_XEN_DEBUG_FS */
diff --git a/arch/x86/xen/multicalls.c b/arch/x86/xen/multicalls.c
index 9efd1c6..8ea8a0d 100644
--- a/arch/x86/xen/multicalls.c
+++ b/arch/x86/xen/multicalls.c
@@ -21,16 +21,20 @@
*/
#include <linux/percpu.h>
#include <linux/hardirq.h>
+#include <linux/debugfs.h>
#include <asm/xen/hypercall.h>
#include "multicalls.h"
+#include "debugfs.h"
+
+#define MC_BATCH 32
#define MC_DEBUG 1
-#define MC_BATCH 32
#define MC_ARGS (MC_BATCH * 16)
+
struct mc_buffer {
struct multicall_entry entries[MC_BATCH];
#if MC_DEBUG
@@ -47,6 +51,76 @@ struct mc_buffer {
static DEFINE_PER_CPU(struct mc_buffer, mc_buffer);
DEFINE_PER_CPU(unsigned long, xen_mc_irq_flags);
+/* flush reasons 0- slots, 1- args, 2- callbacks */
+enum flush_reasons
+{
+ FL_SLOTS,
+ FL_ARGS,
+ FL_CALLBACKS,
+
+ FL_N_REASONS
+};
+
+#ifdef CONFIG_XEN_DEBUG_FS
+#define NHYPERCALLS 40 /* not really */
+
+static struct {
+ unsigned histo[MC_BATCH+1];
+
+ unsigned issued;
+ unsigned arg_total;
+ unsigned hypercalls;
+ unsigned histo_hypercalls[NHYPERCALLS];
+
+ unsigned flush[FL_N_REASONS];
+} mc_stats;
+
+static u8 zero_stats;
+
+static inline void check_zero(void)
+{
+ if (unlikely(zero_stats)) {
+ memset(&mc_stats, 0, sizeof(mc_stats));
+ zero_stats = 0;
+ }
+}
+
+static void mc_add_stats(const struct mc_buffer *mc)
+{
+ int i;
+
+ check_zero();
+
+ mc_stats.issued++;
+ mc_stats.hypercalls += mc->mcidx;
+ mc_stats.arg_total += mc->argidx;
+
+ mc_stats.histo[mc->mcidx]++;
+ for(i = 0; i < mc->mcidx; i++) {
+ unsigned op = mc->entries[i].op;
+ if (op < NHYPERCALLS)
+ mc_stats.histo_hypercalls[op]++;
+ }
+}
+
+static void mc_stats_flush(enum flush_reasons idx)
+{
+ check_zero();
+
+ mc_stats.flush[idx]++;
+}
+
+#else /* !CONFIG_XEN_DEBUG_FS */
+
+static inline void mc_add_stats(const struct mc_buffer *mc)
+{
+}
+
+static inline void mc_stats_flush(enum flush_reasons idx)
+{
+}
+#endif /* CONFIG_XEN_DEBUG_FS */
+
void xen_mc_flush(void)
{
struct mc_buffer *b = &__get_cpu_var(mc_buffer);
@@ -60,6 +134,8 @@ void xen_mc_flush(void)
something in the middle */
local_irq_save(flags);
+ mc_add_stats(b);
+
if (b->mcidx) {
#if MC_DEBUG
memcpy(b->debug, b->entries,
@@ -115,6 +191,7 @@ struct multicall_space __xen_mc_entry(size_t args)
if (b->mcidx == MC_BATCH ||
(argidx + args) > MC_ARGS) {
+ mc_stats_flush(b->mcidx == MC_BATCH ? FL_SLOTS : FL_ARGS);
xen_mc_flush();
argidx = roundup(b->argidx, sizeof(u64));
}
@@ -158,10 +235,44 @@ void xen_mc_callback(void (*fn)(void *), void *data)
struct mc_buffer *b = &__get_cpu_var(mc_buffer);
struct callback *cb;
- if (b->cbidx == MC_BATCH)
+ if (b->cbidx == MC_BATCH) {
+ mc_stats_flush(FL_CALLBACKS);
xen_mc_flush();
+ }
cb = &b->callbacks[b->cbidx++];
cb->fn = fn;
cb->data = data;
}
+
+#ifdef CONFIG_XEN_DEBUG_FS
+
+static struct dentry *d_mc_debug;
+
+static int __init xen_mc_debugfs(void)
+{
+ struct dentry *d_xen = xen_init_debugfs();
+
+ if (d_xen == NULL)
+ return -ENOMEM;
+
+ d_mc_debug = debugfs_create_dir("multicalls", d_xen);
+
+ debugfs_create_u8("zero_stats", 0644, d_mc_debug, &zero_stats);
+
+ debugfs_create_u32("batches", 0444, d_mc_debug, &mc_stats.issued);
+ debugfs_create_u32("hypercalls", 0444, d_mc_debug, &mc_stats.hypercalls);
+ debugfs_create_u32("arg_total", 0444, d_mc_debug, &mc_stats.arg_total);
+
+ xen_debugfs_create_u32_array("batch_histo", 0444, d_mc_debug,
+ mc_stats.histo, MC_BATCH);
+ xen_debugfs_create_u32_array("hypercall_histo", 0444, d_mc_debug,
+ mc_stats.histo_hypercalls, NHYPERCALLS);
+ xen_debugfs_create_u32_array("flush_reasons", 0444, d_mc_debug,
+ mc_stats.flush, FL_N_REASONS);
+
+ return 0;
+}
+fs_initcall(xen_mc_debugfs);
+
+#endif /* CONFIG_XEN_DEBUG_FS */
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index d8faf79..d77da61 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -11,11 +11,8 @@
* useful topology information for the kernel to make use of. As a
* result, all CPUs are treated as if they're single-core and
* single-threaded.
- *
- * This does not handle HOTPLUG_CPU yet.
*/
#include <linux/sched.h>
-#include <linux/kernel_stat.h>
#include <linux/err.h>
#include <linux/smp.h>
@@ -36,8 +33,6 @@
#include "xen-ops.h"
#include "mmu.h"
-static void __cpuinit xen_init_lock_cpu(int cpu);
-
cpumask_t xen_cpu_initialized_map;
static DEFINE_PER_CPU(int, resched_irq);
@@ -64,11 +59,12 @@ static irqreturn_t xen_reschedule_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static __cpuinit void cpu_bringup_and_idle(void)
+static __cpuinit void cpu_bringup(void)
{
int cpu = smp_processor_id();
cpu_init();
+ touch_softlockup_watchdog();
preempt_disable();
xen_enable_sysenter();
@@ -89,6 +85,11 @@ static __cpuinit void cpu_bringup_and_idle(void)
local_irq_enable();
wmb(); /* make sure everything is out */
+}
+
+static __cpuinit void cpu_bringup_and_idle(void)
+{
+ cpu_bringup();
cpu_idle();
}
@@ -212,8 +213,6 @@ static void __init xen_smp_prepare_cpus(unsigned int max_cpus)
cpu_set(cpu, cpu_present_map);
}
-
- //init_xenbus_allowed_cpumask();
}
static __cpuinit int
@@ -281,12 +280,6 @@ static int __cpuinit xen_cpu_up(unsigned int cpu)
struct task_struct *idle = idle_task(cpu);
int rc;
-#if 0
- rc = cpu_up_check(cpu);
- if (rc)
- return rc;
-#endif
-
#ifdef CONFIG_X86_64
/* Allocate node local memory for AP pdas */
WARN_ON(cpu == 0);
@@ -339,6 +332,60 @@ static void xen_smp_cpus_done(unsigned int max_cpus)
{
}
+#ifdef CONFIG_HOTPLUG_CPU
+static int xen_cpu_disable(void)
+{
+ unsigned int cpu = smp_processor_id();
+ if (cpu == 0)
+ return -EBUSY;
+
+ cpu_disable_common();
+
+ load_cr3(swapper_pg_dir);
+ return 0;
+}
+
+static void xen_cpu_die(unsigned int cpu)
+{
+ while (HYPERVISOR_vcpu_op(VCPUOP_is_up, cpu, NULL)) {
+ current->state = TASK_UNINTERRUPTIBLE;
+ schedule_timeout(HZ/10);
+ }
+ unbind_from_irqhandler(per_cpu(resched_irq, cpu), NULL);
+ unbind_from_irqhandler(per_cpu(callfunc_irq, cpu), NULL);
+ unbind_from_irqhandler(per_cpu(debug_irq, cpu), NULL);
+ unbind_from_irqhandler(per_cpu(callfuncsingle_irq, cpu), NULL);
+ xen_uninit_lock_cpu(cpu);
+ xen_teardown_timer(cpu);
+
+ if (num_online_cpus() == 1)
+ alternatives_smp_switch(0);
+}
+
+static void xen_play_dead(void)
+{
+ play_dead_common();
+ HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
+ cpu_bringup();
+}
+
+#else /* !CONFIG_HOTPLUG_CPU */
+static int xen_cpu_disable(void)
+{
+ return -ENOSYS;
+}
+
+static void xen_cpu_die(unsigned int cpu)
+{
+ BUG();
+}
+
+static void xen_play_dead(void)
+{
+ BUG();
+}
+
+#endif
static void stop_self(void *v)
{
int cpu = smp_processor_id();
@@ -419,176 +466,16 @@ static irqreturn_t xen_call_function_single_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
-struct xen_spinlock {
- unsigned char lock; /* 0 -> free; 1 -> locked */
- unsigned short spinners; /* count of waiting cpus */
-};
-
-static int xen_spin_is_locked(struct raw_spinlock *lock)
-{
- struct xen_spinlock *xl = (struct xen_spinlock *)lock;
-
- return xl->lock != 0;
-}
-
-static int xen_spin_is_contended(struct raw_spinlock *lock)
-{
- struct xen_spinlock *xl = (struct xen_spinlock *)lock;
-
- /* Not strictly true; this is only the count of contended
- lock-takers entering the slow path. */
- return xl->spinners != 0;
-}
-
-static int xen_spin_trylock(struct raw_spinlock *lock)
-{
- struct xen_spinlock *xl = (struct xen_spinlock *)lock;
- u8 old = 1;
-
- asm("xchgb %b0,%1"
- : "+q" (old), "+m" (xl->lock) : : "memory");
-
- return old == 0;
-}
-
-static DEFINE_PER_CPU(int, lock_kicker_irq) = -1;
-static DEFINE_PER_CPU(struct xen_spinlock *, lock_spinners);
-
-static inline void spinning_lock(struct xen_spinlock *xl)
-{
- __get_cpu_var(lock_spinners) = xl;
- wmb(); /* set lock of interest before count */
- asm(LOCK_PREFIX " incw %0"
- : "+m" (xl->spinners) : : "memory");
-}
-
-static inline void unspinning_lock(struct xen_spinlock *xl)
-{
- asm(LOCK_PREFIX " decw %0"
- : "+m" (xl->spinners) : : "memory");
- wmb(); /* decrement count before clearing lock */
- __get_cpu_var(lock_spinners) = NULL;
-}
-
-static noinline int xen_spin_lock_slow(struct raw_spinlock *lock)
-{
- struct xen_spinlock *xl = (struct xen_spinlock *)lock;
- int irq = __get_cpu_var(lock_kicker_irq);
- int ret;
-
- /* If kicker interrupts not initialized yet, just spin */
- if (irq == -1)
- return 0;
-
- /* announce we're spinning */
- spinning_lock(xl);
-
- /* clear pending */
- xen_clear_irq_pending(irq);
-
- /* check again make sure it didn't become free while
- we weren't looking */
- ret = xen_spin_trylock(lock);
- if (ret)
- goto out;
-
- /* block until irq becomes pending */
- xen_poll_irq(irq);
- kstat_this_cpu.irqs[irq]++;
-
-out:
- unspinning_lock(xl);
- return ret;
-}
-
-static void xen_spin_lock(struct raw_spinlock *lock)
-{
- struct xen_spinlock *xl = (struct xen_spinlock *)lock;
- int timeout;
- u8 oldval;
-
- do {
- timeout = 1 << 10;
-
- asm("1: xchgb %1,%0\n"
- " testb %1,%1\n"
- " jz 3f\n"
- "2: rep;nop\n"
- " cmpb $0,%0\n"
- " je 1b\n"
- " dec %2\n"
- " jnz 2b\n"
- "3:\n"
- : "+m" (xl->lock), "=q" (oldval), "+r" (timeout)
- : "1" (1)
- : "memory");
-
- } while (unlikely(oldval != 0 && !xen_spin_lock_slow(lock)));
-}
-
-static noinline void xen_spin_unlock_slow(struct xen_spinlock *xl)
-{
- int cpu;
-
- for_each_online_cpu(cpu) {
- /* XXX should mix up next cpu selection */
- if (per_cpu(lock_spinners, cpu) == xl) {
- xen_send_IPI_one(cpu, XEN_SPIN_UNLOCK_VECTOR);
- break;
- }
- }
-}
-
-static void xen_spin_unlock(struct raw_spinlock *lock)
-{
- struct xen_spinlock *xl = (struct xen_spinlock *)lock;
-
- smp_wmb(); /* make sure no writes get moved after unlock */
- xl->lock = 0; /* release lock */
-
- /* make sure unlock happens before kick */
- barrier();
-
- if (unlikely(xl->spinners))
- xen_spin_unlock_slow(xl);
-}
-
-static __cpuinit void xen_init_lock_cpu(int cpu)
-{
- int irq;
- const char *name;
-
- name = kasprintf(GFP_KERNEL, "spinlock%d", cpu);
- irq = bind_ipi_to_irqhandler(XEN_SPIN_UNLOCK_VECTOR,
- cpu,
- xen_reschedule_interrupt,
- IRQF_DISABLED|IRQF_PERCPU|IRQF_NOBALANCING,
- name,
- NULL);
-
- if (irq >= 0) {
- disable_irq(irq); /* make sure it's never delivered */
- per_cpu(lock_kicker_irq, cpu) = irq;
- }
-
- printk("cpu %d spinlock event irq %d\n", cpu, irq);
-}
-
-static void __init xen_init_spinlocks(void)
-{
- pv_lock_ops.spin_is_locked = xen_spin_is_locked;
- pv_lock_ops.spin_is_contended = xen_spin_is_contended;
- pv_lock_ops.spin_lock = xen_spin_lock;
- pv_lock_ops.spin_trylock = xen_spin_trylock;
- pv_lock_ops.spin_unlock = xen_spin_unlock;
-}
-
static const struct smp_ops xen_smp_ops __initdata = {
.smp_prepare_boot_cpu = xen_smp_prepare_boot_cpu,
.smp_prepare_cpus = xen_smp_prepare_cpus,
- .cpu_up = xen_cpu_up,
.smp_cpus_done = xen_smp_cpus_done,
+ .cpu_up = xen_cpu_up,
+ .cpu_die = xen_cpu_die,
+ .cpu_disable = xen_cpu_disable,
+ .play_dead = xen_play_dead,
+
.smp_send_stop = xen_smp_send_stop,
.smp_send_reschedule = xen_smp_send_reschedule,
diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c
new file mode 100644
index 0000000..dd71e3a
--- /dev/null
+++ b/arch/x86/xen/spinlock.c
@@ -0,0 +1,428 @@
+/*
+ * Split spinlock implementation out into its own file, so it can be
+ * compiled in a FTRACE-compatible way.
+ */
+#include <linux/kernel_stat.h>
+#include <linux/spinlock.h>
+#include <linux/debugfs.h>
+#include <linux/log2.h>
+
+#include <asm/paravirt.h>
+
+#include <xen/interface/xen.h>
+#include <xen/events.h>
+
+#include "xen-ops.h"
+#include "debugfs.h"
+
+#ifdef CONFIG_XEN_DEBUG_FS
+static struct xen_spinlock_stats
+{
+ u64 taken;
+ u32 taken_slow;
+ u32 taken_slow_nested;
+ u32 taken_slow_pickup;
+ u32 taken_slow_spurious;
+ u32 taken_slow_irqenable;
+
+ u64 released;
+ u32 released_slow;
+ u32 released_slow_kicked;
+
+#define HISTO_BUCKETS 30
+ u32 histo_spin_total[HISTO_BUCKETS+1];
+ u32 histo_spin_spinning[HISTO_BUCKETS+1];
+ u32 histo_spin_blocked[HISTO_BUCKETS+1];
+
+ u64 time_total;
+ u64 time_spinning;
+ u64 time_blocked;
+} spinlock_stats;
+
+static u8 zero_stats;
+
+static unsigned lock_timeout = 1 << 10;
+#define TIMEOUT lock_timeout
+
+static inline void check_zero(void)
+{
+ if (unlikely(zero_stats)) {
+ memset(&spinlock_stats, 0, sizeof(spinlock_stats));
+ zero_stats = 0;
+ }
+}
+
+#define ADD_STATS(elem, val) \
+ do { check_zero(); spinlock_stats.elem += (val); } while(0)
+
+static inline u64 spin_time_start(void)
+{
+ return xen_clocksource_read();
+}
+
+static void __spin_time_accum(u64 delta, u32 *array)
+{
+ unsigned index = ilog2(delta);
+
+ check_zero();
+
+ if (index < HISTO_BUCKETS)
+ array[index]++;
+ else
+ array[HISTO_BUCKETS]++;
+}
+
+static inline void spin_time_accum_spinning(u64 start)
+{
+ u32 delta = xen_clocksource_read() - start;
+
+ __spin_time_accum(delta, spinlock_stats.histo_spin_spinning);
+ spinlock_stats.time_spinning += delta;
+}
+
+static inline void spin_time_accum_total(u64 start)
+{
+ u32 delta = xen_clocksource_read() - start;
+
+ __spin_time_accum(delta, spinlock_stats.histo_spin_total);
+ spinlock_stats.time_total += delta;
+}
+
+static inline void spin_time_accum_blocked(u64 start)
+{
+ u32 delta = xen_clocksource_read() - start;
+
+ __spin_time_accum(delta, spinlock_stats.histo_spin_blocked);
+ spinlock_stats.time_blocked += delta;
+}
+#else /* !CONFIG_XEN_DEBUG_FS */
+#define TIMEOUT (1 << 10)
+#define ADD_STATS(elem, val) do { (void)(val); } while(0)
+
+static inline u64 spin_time_start(void)
+{
+ return 0;
+}
+
+static inline void spin_time_accum_total(u64 start)
+{
+}
+static inline void spin_time_accum_spinning(u64 start)
+{
+}
+static inline void spin_time_accum_blocked(u64 start)
+{
+}
+#endif /* CONFIG_XEN_DEBUG_FS */
+
+struct xen_spinlock {
+ unsigned char lock; /* 0 -> free; 1 -> locked */
+ unsigned short spinners; /* count of waiting cpus */
+};
+
+static int xen_spin_is_locked(struct raw_spinlock *lock)
+{
+ struct xen_spinlock *xl = (struct xen_spinlock *)lock;
+
+ return xl->lock != 0;
+}
+
+static int xen_spin_is_contended(struct raw_spinlock *lock)
+{
+ struct xen_spinlock *xl = (struct xen_spinlock *)lock;
+
+ /* Not strictly true; this is only the count of contended
+ lock-takers entering the slow path. */
+ return xl->spinners != 0;
+}
+
+static int xen_spin_trylock(struct raw_spinlock *lock)
+{
+ struct xen_spinlock *xl = (struct xen_spinlock *)lock;
+ u8 old = 1;
+
+ asm("xchgb %b0,%1"
+ : "+q" (old), "+m" (xl->lock) : : "memory");
+
+ return old == 0;
+}
+
+static DEFINE_PER_CPU(int, lock_kicker_irq) = -1;
+static DEFINE_PER_CPU(struct xen_spinlock *, lock_spinners);
+
+/*
+ * Mark a cpu as interested in a lock. Returns the CPU's previous
+ * lock of interest, in case we got preempted by an interrupt.
+ */
+static inline struct xen_spinlock *spinning_lock(struct xen_spinlock *xl)
+{
+ struct xen_spinlock *prev;
+
+ prev = __get_cpu_var(lock_spinners);
+ __get_cpu_var(lock_spinners) = xl;
+
+ wmb(); /* set lock of interest before count */
+
+ asm(LOCK_PREFIX " incw %0"
+ : "+m" (xl->spinners) : : "memory");
+
+ return prev;
+}
+
+/*
+ * Mark a cpu as no longer interested in a lock. Restores previous
+ * lock of interest (NULL for none).
+ */
+static inline void unspinning_lock(struct xen_spinlock *xl, struct xen_spinlock *prev)
+{
+ asm(LOCK_PREFIX " decw %0"
+ : "+m" (xl->spinners) : : "memory");
+ wmb(); /* decrement count before restoring lock */
+ __get_cpu_var(lock_spinners) = prev;
+}
+
+static noinline int xen_spin_lock_slow(struct raw_spinlock *lock, bool irq_enable)
+{
+ struct xen_spinlock *xl = (struct xen_spinlock *)lock;
+ struct xen_spinlock *prev;
+ int irq = __get_cpu_var(lock_kicker_irq);
+ int ret;
+ unsigned long flags;
+ u64 start;
+
+ /* If kicker interrupts not initialized yet, just spin */
+ if (irq == -1)
+ return 0;
+
+ start = spin_time_start();
+
+ /* announce we're spinning */
+ prev = spinning_lock(xl);
+
+ flags = __raw_local_save_flags();
+ if (irq_enable) {
+ ADD_STATS(taken_slow_irqenable, 1);
+ raw_local_irq_enable();
+ }
+
+ ADD_STATS(taken_slow, 1);
+ ADD_STATS(taken_slow_nested, prev != NULL);
+
+ do {
+ /* clear pending */
+ xen_clear_irq_pending(irq);
+
+ /* check again make sure it didn't become free while
+ we weren't looking */
+ ret = xen_spin_trylock(lock);
+ if (ret) {
+ ADD_STATS(taken_slow_pickup, 1);
+
+ /*
+ * If we interrupted another spinlock while it
+ * was blocking, make sure it doesn't block
+ * without rechecking the lock.
+ */
+ if (prev != NULL)
+ xen_set_irq_pending(irq);
+ goto out;
+ }
+
+ /*
+ * Block until irq becomes pending. If we're
+ * interrupted at this point (after the trylock but
+ * before entering the block), then the nested lock
+ * handler guarantees that the irq will be left
+ * pending if there's any chance the lock became free;
+ * xen_poll_irq() returns immediately if the irq is
+ * pending.
+ */
+ xen_poll_irq(irq);
+ ADD_STATS(taken_slow_spurious, !xen_test_irq_pending(irq));
+ } while (!xen_test_irq_pending(irq)); /* check for spurious wakeups */
+
+ kstat_this_cpu.irqs[irq]++;
+
+out:
+ raw_local_irq_restore(flags);
+ unspinning_lock(xl, prev);
+ spin_time_accum_blocked(start);
+
+ return ret;
+}
+
+static inline void __xen_spin_lock(struct raw_spinlock *lock, bool irq_enable)
+{
+ struct xen_spinlock *xl = (struct xen_spinlock *)lock;
+ unsigned timeout;
+ u8 oldval;
+ u64 start_spin;
+
+ ADD_STATS(taken, 1);
+
+ start_spin = spin_time_start();
+
+ do {
+ u64 start_spin_fast = spin_time_start();
+
+ timeout = TIMEOUT;
+
+ asm("1: xchgb %1,%0\n"
+ " testb %1,%1\n"
+ " jz 3f\n"
+ "2: rep;nop\n"
+ " cmpb $0,%0\n"
+ " je 1b\n"
+ " dec %2\n"
+ " jnz 2b\n"
+ "3:\n"
+ : "+m" (xl->lock), "=q" (oldval), "+r" (timeout)
+ : "1" (1)
+ : "memory");
+
+ spin_time_accum_spinning(start_spin_fast);
+
+ } while (unlikely(oldval != 0 &&
+ (TIMEOUT == ~0 || !xen_spin_lock_slow(lock, irq_enable))));
+
+ spin_time_accum_total(start_spin);
+}
+
+static void xen_spin_lock(struct raw_spinlock *lock)
+{
+ __xen_spin_lock(lock, false);
+}
+
+static void xen_spin_lock_flags(struct raw_spinlock *lock, unsigned long flags)
+{
+ __xen_spin_lock(lock, !raw_irqs_disabled_flags(flags));
+}
+
+static noinline void xen_spin_unlock_slow(struct xen_spinlock *xl)
+{
+ int cpu;
+
+ ADD_STATS(released_slow, 1);
+
+ for_each_online_cpu(cpu) {
+ /* XXX should mix up next cpu selection */
+ if (per_cpu(lock_spinners, cpu) == xl) {
+ ADD_STATS(released_slow_kicked, 1);
+ xen_send_IPI_one(cpu, XEN_SPIN_UNLOCK_VECTOR);
+ break;
+ }
+ }
+}
+
+static void xen_spin_unlock(struct raw_spinlock *lock)
+{
+ struct xen_spinlock *xl = (struct xen_spinlock *)lock;
+
+ ADD_STATS(released, 1);
+
+ smp_wmb(); /* make sure no writes get moved after unlock */
+ xl->lock = 0; /* release lock */
+
+ /* make sure unlock happens before kick */
+ barrier();
+
+ if (unlikely(xl->spinners))
+ xen_spin_unlock_slow(xl);
+}
+
+static irqreturn_t dummy_handler(int irq, void *dev_id)
+{
+ BUG();
+ return IRQ_HANDLED;
+}
+
+void __cpuinit xen_init_lock_cpu(int cpu)
+{
+ int irq;
+ const char *name;
+
+ name = kasprintf(GFP_KERNEL, "spinlock%d", cpu);
+ irq = bind_ipi_to_irqhandler(XEN_SPIN_UNLOCK_VECTOR,
+ cpu,
+ dummy_handler,
+ IRQF_DISABLED|IRQF_PERCPU|IRQF_NOBALANCING,
+ name,
+ NULL);
+
+ if (irq >= 0) {
+ disable_irq(irq); /* make sure it's never delivered */
+ per_cpu(lock_kicker_irq, cpu) = irq;
+ }
+
+ printk("cpu %d spinlock event irq %d\n", cpu, irq);
+}
+
+void xen_uninit_lock_cpu(int cpu)
+{
+ unbind_from_irqhandler(per_cpu(lock_kicker_irq, cpu), NULL);
+}
+
+void __init xen_init_spinlocks(void)
+{
+ pv_lock_ops.spin_is_locked = xen_spin_is_locked;
+ pv_lock_ops.spin_is_contended = xen_spin_is_contended;
+ pv_lock_ops.spin_lock = xen_spin_lock;
+ pv_lock_ops.spin_lock_flags = xen_spin_lock_flags;
+ pv_lock_ops.spin_trylock = xen_spin_trylock;
+ pv_lock_ops.spin_unlock = xen_spin_unlock;
+}
+
+#ifdef CONFIG_XEN_DEBUG_FS
+
+static struct dentry *d_spin_debug;
+
+static int __init xen_spinlock_debugfs(void)
+{
+ struct dentry *d_xen = xen_init_debugfs();
+
+ if (d_xen == NULL)
+ return -ENOMEM;
+
+ d_spin_debug = debugfs_create_dir("spinlocks", d_xen);
+
+ debugfs_create_u8("zero_stats", 0644, d_spin_debug, &zero_stats);
+
+ debugfs_create_u32("timeout", 0644, d_spin_debug, &lock_timeout);
+
+ debugfs_create_u64("taken", 0444, d_spin_debug, &spinlock_stats.taken);
+ debugfs_create_u32("taken_slow", 0444, d_spin_debug,
+ &spinlock_stats.taken_slow);
+ debugfs_create_u32("taken_slow_nested", 0444, d_spin_debug,
+ &spinlock_stats.taken_slow_nested);
+ debugfs_create_u32("taken_slow_pickup", 0444, d_spin_debug,
+ &spinlock_stats.taken_slow_pickup);
+ debugfs_create_u32("taken_slow_spurious", 0444, d_spin_debug,
+ &spinlock_stats.taken_slow_spurious);
+ debugfs_create_u32("taken_slow_irqenable", 0444, d_spin_debug,
+ &spinlock_stats.taken_slow_irqenable);
+
+ debugfs_create_u64("released", 0444, d_spin_debug, &spinlock_stats.released);
+ debugfs_create_u32("released_slow", 0444, d_spin_debug,
+ &spinlock_stats.released_slow);
+ debugfs_create_u32("released_slow_kicked", 0444, d_spin_debug,
+ &spinlock_stats.released_slow_kicked);
+
+ debugfs_create_u64("time_spinning", 0444, d_spin_debug,
+ &spinlock_stats.time_spinning);
+ debugfs_create_u64("time_blocked", 0444, d_spin_debug,
+ &spinlock_stats.time_blocked);
+ debugfs_create_u64("time_total", 0444, d_spin_debug,
+ &spinlock_stats.time_total);
+
+ xen_debugfs_create_u32_array("histo_total", 0444, d_spin_debug,
+ spinlock_stats.histo_spin_total, HISTO_BUCKETS + 1);
+ xen_debugfs_create_u32_array("histo_spinning", 0444, d_spin_debug,
+ spinlock_stats.histo_spin_spinning, HISTO_BUCKETS + 1);
+ xen_debugfs_create_u32_array("histo_blocked", 0444, d_spin_debug,
+ spinlock_stats.histo_spin_blocked, HISTO_BUCKETS + 1);
+
+ return 0;
+}
+fs_initcall(xen_spinlock_debugfs);
+
+#endif /* CONFIG_XEN_DEBUG_FS */
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index 685b774..004ba86 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -30,8 +30,6 @@
#define TIMER_SLOP 100000
#define NS_PER_TICK (1000000000LL / HZ)
-static cycle_t xen_clocksource_read(void);
-
/* runstate info updated by Xen */
static DEFINE_PER_CPU(struct vcpu_runstate_info, runstate);
@@ -213,7 +211,7 @@ unsigned long xen_tsc_khz(void)
return xen_khz;
}
-static cycle_t xen_clocksource_read(void)
+cycle_t xen_clocksource_read(void)
{
struct pvclock_vcpu_time_info *src;
cycle_t ret;
@@ -452,6 +450,14 @@ void xen_setup_timer(int cpu)
setup_runstate_info(cpu);
}
+void xen_teardown_timer(int cpu)
+{
+ struct clock_event_device *evt;
+ BUG_ON(cpu == 0);
+ evt = &per_cpu(xen_clock_events, cpu);
+ unbind_from_irqhandler(evt->irq, NULL);
+}
+
void xen_setup_cpu_clockevents(void)
{
BUG_ON(preemptible());
diff --git a/arch/x86/xen/xen-asm_32.S b/arch/x86/xen/xen-asm_32.S
index 2497a30..42786f5 100644
--- a/arch/x86/xen/xen-asm_32.S
+++ b/arch/x86/xen/xen-asm_32.S
@@ -298,7 +298,7 @@ check_events:
push %eax
push %ecx
push %edx
- call force_evtchn_callback
+ call xen_force_evtchn_callback
pop %edx
pop %ecx
pop %eax
diff --git a/arch/x86/xen/xen-asm_64.S b/arch/x86/xen/xen-asm_64.S
index 7f58304..3b9bda4 100644
--- a/arch/x86/xen/xen-asm_64.S
+++ b/arch/x86/xen/xen-asm_64.S
@@ -122,7 +122,7 @@ check_events:
push %r9
push %r10
push %r11
- call force_evtchn_callback
+ call xen_force_evtchn_callback
pop %r11
pop %r10
pop %r9
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index dd3c231..d7422dc 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -2,6 +2,7 @@
#define XEN_OPS_H
#include <linux/init.h>
+#include <linux/clocksource.h>
#include <linux/irqreturn.h>
#include <xen/xen-ops.h>
@@ -31,7 +32,10 @@ void xen_vcpu_restore(void);
void __init xen_build_dynamic_phys_to_machine(void);
+void xen_init_irq_ops(void);
void xen_setup_timer(int cpu);
+void xen_teardown_timer(int cpu);
+cycle_t xen_clocksource_read(void);
void xen_setup_cpu_clockevents(void);
unsigned long xen_tsc_khz(void);
void __init xen_time_init(void);
@@ -50,6 +54,10 @@ void __init xen_setup_vcpu_info_placement(void);
#ifdef CONFIG_SMP
void xen_smp_init(void);
+void __init xen_init_spinlocks(void);
+__cpuinit void xen_init_lock_cpu(int cpu);
+void xen_uninit_lock_cpu(int cpu);
+
extern cpumask_t xen_cpu_initialized_map;
#else
static inline void xen_smp_init(void) {}
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 3ca643c..d5e7532 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1032,7 +1032,7 @@ static struct xenbus_driver blkfront = {
static int __init xlblk_init(void)
{
- if (!is_running_on_xen())
+ if (!xen_domain())
return -ENODEV;
if (register_blkdev(XENVBD_MAJOR, DEV_NAME)) {
diff --git a/drivers/char/hvc_xen.c b/drivers/char/hvc_xen.c
index 6b70aa6..538ceea 100644
--- a/drivers/char/hvc_xen.c
+++ b/drivers/char/hvc_xen.c
@@ -108,8 +108,8 @@ static int __init xen_init(void)
{
struct hvc_struct *hp;
- if (!is_running_on_xen() ||
- is_initial_xendomain() ||
+ if (!xen_pv_domain() ||
+ xen_initial_domain() ||
!xen_start_info->console.domU.evtchn)
return -ENODEV;
@@ -142,7 +142,7 @@ static void __exit xen_fini(void)
static int xen_cons_init(void)
{
- if (!is_running_on_xen())
+ if (!xen_pv_domain())
return 0;
hvc_instantiate(HVC_COOKIE, 0, &hvc_ops);
diff --git a/drivers/input/xen-kbdfront.c b/drivers/input/xen-kbdfront.c
index 9ce3b3b..3ab6362 100644
--- a/drivers/input/xen-kbdfront.c
+++ b/drivers/input/xen-kbdfront.c
@@ -335,11 +335,11 @@ static struct xenbus_driver xenkbd = {
static int __init xenkbd_init(void)
{
- if (!is_running_on_xen())
+ if (!xen_domain())
return -ENODEV;
/* Nothing to do if running in dom0. */
- if (is_initial_xendomain())
+ if (xen_initial_domain())
return -ENODEV;
return xenbus_register_frontend(&xenkbd);
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index c749bdb..3c3dd40 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -1794,10 +1794,10 @@ static struct xenbus_driver netfront = {
static int __init netif_init(void)
{
- if (!is_running_on_xen())
+ if (!xen_domain())
return -ENODEV;
- if (is_initial_xendomain())
+ if (xen_initial_domain())
return 0;
printk(KERN_INFO "Initialising Xen virtual ethernet driver.\n");
@@ -1809,7 +1809,7 @@ module_init(netif_init);
static void __exit netif_exit(void)
{
- if (is_initial_xendomain())
+ if (xen_initial_domain())
return;
xenbus_unregister_driver(&netfront);
diff --git a/drivers/video/xen-fbfront.c b/drivers/video/xen-fbfront.c
index 47ed39b..a463b3d 100644
--- a/drivers/video/xen-fbfront.c
+++ b/drivers/video/xen-fbfront.c
@@ -680,11 +680,11 @@ static struct xenbus_driver xenfb = {
static int __init xenfb_init(void)
{
- if (!is_running_on_xen())
+ if (!xen_domain())
return -ENODEV;
/* Nothing to do if running in dom0. */
- if (is_initial_xendomain())
+ if (xen_initial_domain())
return -ENODEV;
return xenbus_register_frontend(&xenfb);
diff --git a/drivers/xen/Makefile b/drivers/xen/Makefile
index 363286c..d2a8fdf 100644
--- a/drivers/xen/Makefile
+++ b/drivers/xen/Makefile
@@ -1,4 +1,5 @@
obj-y += grant-table.o features.o events.o manage.o
obj-y += xenbus/
+obj-$(CONFIG_HOTPLUG_CPU) += cpu_hotplug.o
obj-$(CONFIG_XEN_XENCOMM) += xencomm.o
obj-$(CONFIG_XEN_BALLOON) += balloon.o
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 2e15da5..a51f3e1 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -226,9 +226,8 @@ static int increase_reservation(unsigned long nr_pages)
}
set_xen_guest_handle(reservation.extent_start, frame_list);
- reservation.nr_extents = nr_pages;
- rc = HYPERVISOR_memory_op(
- XENMEM_populate_physmap, &reservation);
+ reservation.nr_extents = nr_pages;
+ rc = HYPERVISOR_memory_op(XENMEM_populate_physmap, &reservation);
if (rc < nr_pages) {
if (rc > 0) {
int ret;
@@ -236,7 +235,7 @@ static int increase_reservation(unsigned long nr_pages)
/* We hit the Xen hard limit: reprobe. */
reservation.nr_extents = rc;
ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation,
- &reservation);
+ &reservation);
BUG_ON(ret != rc);
}
if (rc >= 0)
@@ -420,7 +419,7 @@ static int __init balloon_init(void)
unsigned long pfn;
struct page *page;
- if (!is_running_on_xen())
+ if (!xen_pv_domain())
return -ENODEV;
pr_info("xen_balloon: Initialising balloon driver.\n");
@@ -464,136 +463,13 @@ static void balloon_exit(void)
module_exit(balloon_exit);
-static void balloon_update_driver_allowance(long delta)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&balloon_lock, flags);
- balloon_stats.driver_pages += delta;
- spin_unlock_irqrestore(&balloon_lock, flags);
-}
-
-static int dealloc_pte_fn(
- pte_t *pte, struct page *pmd_page, unsigned long addr, void *data)
-{
- unsigned long mfn = pte_mfn(*pte);
- int ret;
- struct xen_memory_reservation reservation = {
- .nr_extents = 1,
- .extent_order = 0,
- .domid = DOMID_SELF
- };
- set_xen_guest_handle(reservation.extent_start, &mfn);
- set_pte_at(&init_mm, addr, pte, __pte_ma(0ull));
- set_phys_to_machine(__pa(addr) >> PAGE_SHIFT, INVALID_P2M_ENTRY);
- ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation, &reservation);
- BUG_ON(ret != 1);
- return 0;
-}
-
-static struct page **alloc_empty_pages_and_pagevec(int nr_pages)
-{
- unsigned long vaddr, flags;
- struct page *page, **pagevec;
- int i, ret;
-
- pagevec = kmalloc(sizeof(page) * nr_pages, GFP_KERNEL);
- if (pagevec == NULL)
- return NULL;
-
- for (i = 0; i < nr_pages; i++) {
- page = pagevec[i] = alloc_page(GFP_KERNEL);
- if (page == NULL)
- goto err;
-
- vaddr = (unsigned long)page_address(page);
-
- scrub_page(page);
-
- spin_lock_irqsave(&balloon_lock, flags);
-
- if (xen_feature(XENFEAT_auto_translated_physmap)) {
- unsigned long gmfn = page_to_pfn(page);
- struct xen_memory_reservation reservation = {
- .nr_extents = 1,
- .extent_order = 0,
- .domid = DOMID_SELF
- };
- set_xen_guest_handle(reservation.extent_start, &gmfn);
- ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation,
- &reservation);
- if (ret == 1)
- ret = 0; /* success */
- } else {
- ret = apply_to_page_range(&init_mm, vaddr, PAGE_SIZE,
- dealloc_pte_fn, NULL);
- }
-
- if (ret != 0) {
- spin_unlock_irqrestore(&balloon_lock, flags);
- __free_page(page);
- goto err;
- }
-
- totalram_pages = --balloon_stats.current_pages;
-
- spin_unlock_irqrestore(&balloon_lock, flags);
- }
-
- out:
- schedule_work(&balloon_worker);
- flush_tlb_all();
- return pagevec;
-
- err:
- spin_lock_irqsave(&balloon_lock, flags);
- while (--i >= 0)
- balloon_append(pagevec[i]);
- spin_unlock_irqrestore(&balloon_lock, flags);
- kfree(pagevec);
- pagevec = NULL;
- goto out;
-}
-
-static void free_empty_pages_and_pagevec(struct page **pagevec, int nr_pages)
-{
- unsigned long flags;
- int i;
-
- if (pagevec == NULL)
- return;
-
- spin_lock_irqsave(&balloon_lock, flags);
- for (i = 0; i < nr_pages; i++) {
- BUG_ON(page_count(pagevec[i]) != 1);
- balloon_append(pagevec[i]);
- }
- spin_unlock_irqrestore(&balloon_lock, flags);
-
- kfree(pagevec);
-
- schedule_work(&balloon_worker);
-}
-
-static void balloon_release_driver_page(struct page *page)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&balloon_lock, flags);
- balloon_append(page);
- balloon_stats.driver_pages--;
- spin_unlock_irqrestore(&balloon_lock, flags);
-
- schedule_work(&balloon_worker);
-}
-
-
-#define BALLOON_SHOW(name, format, args...) \
- static ssize_t show_##name(struct sys_device *dev, \
- char *buf) \
- { \
- return sprintf(buf, format, ##args); \
- } \
+#define BALLOON_SHOW(name, format, args...) \
+ static ssize_t show_##name(struct sys_device *dev, \
+ struct sysdev_attribute *attr, \
+ char *buf) \
+ { \
+ return sprintf(buf, format, ##args); \
+ } \
static SYSDEV_ATTR(name, S_IRUGO, show_##name, NULL)
BALLOON_SHOW(current_kb, "%lu\n", PAGES2KB(balloon_stats.current_pages));
@@ -604,7 +480,8 @@ BALLOON_SHOW(hard_limit_kb,
(balloon_stats.hard_limit!=~0UL) ? PAGES2KB(balloon_stats.hard_limit) : 0);
BALLOON_SHOW(driver_kb, "%lu\n", PAGES2KB(balloon_stats.driver_pages));
-static ssize_t show_target_kb(struct sys_device *dev, char *buf)
+static ssize_t show_target_kb(struct sys_device *dev, struct sysdev_attribute *attr,
+ char *buf)
{
return sprintf(buf, "%lu\n", PAGES2KB(balloon_stats.target_pages));
}
@@ -614,19 +491,14 @@ static ssize_t store_target_kb(struct sys_device *dev,
const char *buf,
size_t count)
{
- char memstring[64], *endchar;
+ char *endchar;
unsigned long long target_bytes;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (count <= 1)
- return -EBADMSG; /* runt */
- if (count > sizeof(memstring))
- return -EFBIG; /* too long */
- strcpy(memstring, buf);
+ target_bytes = memparse(buf, &endchar);
- target_bytes = memparse(memstring, &endchar);
balloon_set_new_target(target_bytes >> PAGE_SHIFT);
return count;
@@ -694,20 +566,4 @@ static int register_balloon(struct sys_device *sysdev)
return error;
}
-static void unregister_balloon(struct sys_device *sysdev)
-{
- int i;
-
- sysfs_remove_group(&sysdev->kobj, &balloon_info_group);
- for (i = 0; i < ARRAY_SIZE(balloon_attrs); i++)
- sysdev_remove_file(sysdev, balloon_attrs[i]);
- sysdev_unregister(sysdev);
- sysdev_class_unregister(&balloon_sysdev_class);
-}
-
-static void balloon_sysfs_exit(void)
-{
- unregister_balloon(&balloon_sysdev);
-}
-
MODULE_LICENSE("GPL");
diff --git a/drivers/xen/cpu_hotplug.c b/drivers/xen/cpu_hotplug.c
new file mode 100644
index 0000000..565280e
--- /dev/null
+++ b/drivers/xen/cpu_hotplug.c
@@ -0,0 +1,90 @@
+#include <linux/notifier.h>
+
+#include <xen/xenbus.h>
+
+#include <asm-x86/xen/hypervisor.h>
+#include <asm/cpu.h>
+
+static void enable_hotplug_cpu(int cpu)
+{
+ if (!cpu_present(cpu))
+ arch_register_cpu(cpu);
+
+ cpu_set(cpu, cpu_present_map);
+}
+
+static void disable_hotplug_cpu(int cpu)
+{
+ if (cpu_present(cpu))
+ arch_unregister_cpu(cpu);
+
+ cpu_clear(cpu, cpu_present_map);
+}
+
+static void vcpu_hotplug(unsigned int cpu)
+{
+ int err;
+ char dir[32], state[32];
+
+ if (!cpu_possible(cpu))
+ return;
+
+ sprintf(dir, "cpu/%u", cpu);
+ err = xenbus_scanf(XBT_NIL, dir, "availability", "%s", state);
+ if (err != 1) {
+ printk(KERN_ERR "XENBUS: Unable to read cpu state\n");
+ return;
+ }
+
+ if (strcmp(state, "online") == 0) {
+ enable_hotplug_cpu(cpu);
+ } else if (strcmp(state, "offline") == 0) {
+ (void)cpu_down(cpu);
+ disable_hotplug_cpu(cpu);
+ } else {
+ printk(KERN_ERR "XENBUS: unknown state(%s) on CPU%d\n",
+ state, cpu);
+ }
+}
+
+static void handle_vcpu_hotplug_event(struct xenbus_watch *watch,
+ const char **vec, unsigned int len)
+{
+ unsigned int cpu;
+ char *cpustr;
+ const char *node = vec[XS_WATCH_PATH];
+
+ cpustr = strstr(node, "cpu/");
+ if (cpustr != NULL) {
+ sscanf(cpustr, "cpu/%u", &cpu);
+ vcpu_hotplug(cpu);
+ }
+}
+
+static int setup_cpu_watcher(struct notifier_block *notifier,
+ unsigned long event, void *data)
+{
+ static struct xenbus_watch cpu_watch = {
+ .node = "cpu",
+ .callback = handle_vcpu_hotplug_event};
+
+ (void)register_xenbus_watch(&cpu_watch);
+
+ return NOTIFY_DONE;
+}
+
+static int __init setup_vcpu_hotplug_event(void)
+{
+ static struct notifier_block xsn_cpu = {
+ .notifier_call = setup_cpu_watcher };
+
+ if (!xen_pv_domain())
+ return -ENODEV;
+
+ register_xenstore_notifier(&xsn_cpu);
+
+ return 0;
+}
+
+arch_initcall(setup_vcpu_hotplug_event);
+
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 0e0c285..c3290bc 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -84,17 +84,6 @@ static int irq_bindcount[NR_IRQS];
/* Xen will never allocate port zero for any purpose. */
#define VALID_EVTCHN(chn) ((chn) != 0)
-/*
- * Force a proper event-channel callback from Xen after clearing the
- * callback mask. We do this in a very simple manner, by making a call
- * down into Xen. The pending flag will be checked by Xen on return.
- */
-void force_evtchn_callback(void)
-{
- (void)HYPERVISOR_xen_version(0, NULL);
-}
-EXPORT_SYMBOL_GPL(force_evtchn_callback);
-
static struct irq_chip xen_dynamic_chip;
/* Constructor for packed IRQ information. */
@@ -175,6 +164,12 @@ static inline void set_evtchn(int port)
sync_set_bit(port, &s->evtchn_pending[0]);
}
+static inline int test_evtchn(int port)
+{
+ struct shared_info *s = HYPERVISOR_shared_info;
+ return sync_test_bit(port, &s->evtchn_pending[0]);
+}
+
/**
* notify_remote_via_irq - send event to remote end of event channel via irq
@@ -365,6 +360,10 @@ static void unbind_from_irq(unsigned int irq)
per_cpu(virq_to_irq, cpu_from_evtchn(evtchn))
[index_from_irq(irq)] = -1;
break;
+ case IRQT_IPI:
+ per_cpu(ipi_to_irq, cpu_from_evtchn(evtchn))
+ [index_from_irq(irq)] = -1;
+ break;
default:
break;
}
@@ -743,6 +742,25 @@ void xen_clear_irq_pending(int irq)
clear_evtchn(evtchn);
}
+void xen_set_irq_pending(int irq)
+{
+ int evtchn = evtchn_from_irq(irq);
+
+ if (VALID_EVTCHN(evtchn))
+ set_evtchn(evtchn);
+}
+
+bool xen_test_irq_pending(int irq)
+{
+ int evtchn = evtchn_from_irq(irq);
+ bool ret = false;
+
+ if (VALID_EVTCHN(evtchn))
+ ret = test_evtchn(evtchn);
+
+ return ret;
+}
+
/* Poll waiting for an irq to become pending. In the usual case, the
irq will be disabled so it won't deliver an interrupt. */
void xen_poll_irq(int irq)
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index e9e1116..06592b9 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -508,7 +508,7 @@ static int __devinit gnttab_init(void)
unsigned int max_nr_glist_frames, nr_glist_frames;
unsigned int nr_init_grefs;
- if (!is_running_on_xen())
+ if (!xen_domain())
return -ENODEV;
nr_grant_frames = 1;
diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c
index 57ceb53..7f24a98 100644
--- a/drivers/xen/xenbus/xenbus_probe.c
+++ b/drivers/xen/xenbus/xenbus_probe.c
@@ -814,7 +814,7 @@ static int __init xenbus_probe_init(void)
DPRINTK("");
err = -ENODEV;
- if (!is_running_on_xen())
+ if (!xen_domain())
goto out_error;
/* Register ourselves with the kernel bus subsystem */
@@ -829,7 +829,7 @@ static int __init xenbus_probe_init(void)
/*
* Domain0 doesn't have a store_evtchn or store_mfn yet.
*/
- if (is_initial_xendomain()) {
+ if (xen_initial_domain()) {
/* dom0 not yet supported */
} else {
xenstored_ready = 1;
@@ -846,7 +846,7 @@ static int __init xenbus_probe_init(void)
goto out_unreg_back;
}
- if (!is_initial_xendomain())
+ if (!xen_initial_domain())
xenbus_probe(NULL);
return 0;
@@ -937,7 +937,7 @@ static void wait_for_devices(struct xenbus_driver *xendrv)
unsigned long timeout = jiffies + 10*HZ;
struct device_driver *drv = xendrv ? &xendrv->driver : NULL;
- if (!ready_to_wait_for_devices || !is_running_on_xen())
+ if (!ready_to_wait_for_devices || !xen_domain())
return;
while (exists_disconnected_device(drv)) {
diff --git a/include/asm-x86/acpi.h b/include/asm-x86/acpi.h
index 392e173..672e1e1 100644
--- a/include/asm-x86/acpi.h
+++ b/include/asm-x86/acpi.h
@@ -102,9 +102,6 @@ static inline void disable_acpi(void)
acpi_noirq = 1;
}
-/* Fixmap pages to reserve for ACPI boot-time tables (see fixmap.h) */
-#define FIX_ACPI_PAGES 4
-
extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index b73fea5..f06adac 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -24,6 +24,11 @@ static inline void fill_ldt(struct desc_struct *desc,
desc->d = info->seg_32bit;
desc->g = info->limit_in_pages;
desc->base2 = (info->base_addr & 0xff000000) >> 24;
+ /*
+ * Don't allow setting of the lm bit. It is useless anyway
+ * because 64bit system calls require __USER_CS:
+ */
+ desc->l = 0;
}
extern struct desc_ptr idt_descr;
@@ -97,7 +102,15 @@ static inline int desc_empty(const void *ptr)
native_write_gdt_entry(dt, entry, desc, type)
#define write_idt_entry(dt, entry, g) \
native_write_idt_entry(dt, entry, g)
-#endif
+
+static inline void paravirt_alloc_ldt(struct desc_struct *ldt, unsigned entries)
+{
+}
+
+static inline void paravirt_free_ldt(struct desc_struct *ldt, unsigned entries)
+{
+}
+#endif /* CONFIG_PARAVIRT */
static inline void native_write_idt_entry(gate_desc *idt, int entry,
const gate_desc *gate)
@@ -338,20 +351,16 @@ static inline void set_system_intr_gate(unsigned int n, void *addr)
_set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
}
-static inline void set_trap_gate(unsigned int n, void *addr)
+static inline void set_system_trap_gate(unsigned int n, void *addr)
{
BUG_ON((unsigned)n > 0xFF);
- _set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
+ _set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
}
-static inline void set_system_gate(unsigned int n, void *addr)
+static inline void set_trap_gate(unsigned int n, void *addr)
{
BUG_ON((unsigned)n > 0xFF);
-#ifdef CONFIG_X86_32
- _set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
-#else
- _set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
-#endif
+ _set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
}
static inline void set_task_gate(unsigned int n, unsigned int gdt_entry)
@@ -366,7 +375,7 @@ static inline void set_intr_gate_ist(int n, void *addr, unsigned ist)
_set_gate(n, GATE_INTERRUPT, addr, 0, ist, __KERNEL_CS);
}
-static inline void set_system_gate_ist(int n, void *addr, unsigned ist)
+static inline void set_system_intr_gate_ist(int n, void *addr, unsigned ist)
{
BUG_ON((unsigned)n > 0xFF);
_set_gate(n, GATE_INTERRUPT, addr, 0x3, ist, __KERNEL_CS);
diff --git a/include/asm-x86/es7000/mpparse.h b/include/asm-x86/es7000/mpparse.h
index 7b5c889..ed5a3ca 100644
--- a/include/asm-x86/es7000/mpparse.h
+++ b/include/asm-x86/es7000/mpparse.h
@@ -5,6 +5,7 @@
extern int parse_unisys_oem (char *oemptr);
extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
+extern void unmap_unisys_acpi_oem_table(unsigned long oem_addr);
extern void setup_unisys(void);
#ifndef CONFIG_X86_GENERICARCH
diff --git a/include/asm-x86/fixmap_32.h b/include/asm-x86/fixmap_32.h
index 784e3e7..c6fde10 100644
--- a/include/asm-x86/fixmap_32.h
+++ b/include/asm-x86/fixmap_32.h
@@ -94,15 +94,11 @@ enum fixed_addresses {
* can have a single pgd entry and a single pte table:
*/
#define NR_FIX_BTMAPS 64
-#define FIX_BTMAPS_NESTING 4
+#define FIX_BTMAPS_SLOTS 4
FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 256 -
(__end_of_permanent_fixed_addresses & 255),
- FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1,
+ FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_SLOTS - 1,
FIX_WP_TEST,
-#ifdef CONFIG_ACPI
- FIX_ACPI_BEGIN,
- FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
-#endif
#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
FIX_OHCI1394_BASE,
#endif
diff --git a/include/asm-x86/fixmap_64.h b/include/asm-x86/fixmap_64.h
index dafb24b..a6ff01d 100644
--- a/include/asm-x86/fixmap_64.h
+++ b/include/asm-x86/fixmap_64.h
@@ -49,26 +49,22 @@ enum fixed_addresses {
#ifdef CONFIG_PARAVIRT
FIX_PARAVIRT_BOOTMAP,
#endif
-#ifdef CONFIG_ACPI
- FIX_ACPI_BEGIN,
- FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
-#endif
+ __end_of_permanent_fixed_addresses,
#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
FIX_OHCI1394_BASE,
#endif
- __end_of_permanent_fixed_addresses,
/*
* 256 temporary boot-time mappings, used by early_ioremap(),
* before ioremap() is functional.
*
- * We round it up to the next 512 pages boundary so that we
+ * We round it up to the next 256 pages boundary so that we
* can have a single pgd entry and a single pte table:
*/
#define NR_FIX_BTMAPS 64
-#define FIX_BTMAPS_NESTING 4
- FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 512 -
- (__end_of_permanent_fixed_addresses & 511),
- FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1,
+#define FIX_BTMAPS_SLOTS 4
+ FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 256 -
+ (__end_of_permanent_fixed_addresses & 255),
+ FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_SLOTS - 1,
__end_of_fixed_addresses
};
diff --git a/include/asm-x86/io.h b/include/asm-x86/io.h
index 72b7719..a233f83 100644
--- a/include/asm-x86/io.h
+++ b/include/asm-x86/io.h
@@ -5,20 +5,6 @@
#include <linux/compiler.h>
-/*
- * early_ioremap() and early_iounmap() are for temporary early boot-time
- * mappings, before the real ioremap() is functional.
- * A boot-time mapping is currently limited to at most 16 pages.
- */
-#ifndef __ASSEMBLY__
-extern void early_ioremap_init(void);
-extern void early_ioremap_clear(void);
-extern void early_ioremap_reset(void);
-extern void *early_ioremap(unsigned long offset, unsigned long size);
-extern void early_iounmap(void *addr, unsigned long size);
-extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
-#endif
-
#define build_mmio_read(name, size, type, reg, barrier) \
static inline type name(const volatile void __iomem *addr) \
{ type ret; asm volatile("mov" size " %1,%0":reg (ret) \
@@ -97,6 +83,7 @@ extern void early_ioremap_init(void);
extern void early_ioremap_clear(void);
extern void early_ioremap_reset(void);
extern void *early_ioremap(unsigned long offset, unsigned long size);
+extern void *early_memremap(unsigned long offset, unsigned long size);
extern void early_iounmap(void *addr, unsigned long size);
extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
diff --git a/include/asm-x86/io_64.h b/include/asm-x86/io_64.h
index 64429e9..ee6e086 100644
--- a/include/asm-x86/io_64.h
+++ b/include/asm-x86/io_64.h
@@ -165,9 +165,6 @@ static inline void *phys_to_virt(unsigned long address)
#include <asm-generic/iomap.h>
-extern void *early_ioremap(unsigned long addr, unsigned long size);
-extern void early_iounmap(void *addr, unsigned long size);
-
/*
* This one maps high address device memory and turns off caching for that area.
* it's useful if some control registers are in such an area and write combining
diff --git a/include/asm-x86/irqflags.h b/include/asm-x86/irqflags.h
index 424acb4..2bdab21 100644
--- a/include/asm-x86/irqflags.h
+++ b/include/asm-x86/irqflags.h
@@ -166,27 +166,6 @@ static inline int raw_irqs_disabled(void)
return raw_irqs_disabled_flags(flags);
}
-/*
- * makes the traced hardirq state match with the machine state
- *
- * should be a rarely used function, only in places where its
- * otherwise impossible to know the irq state, like in traps.
- */
-static inline void trace_hardirqs_fixup_flags(unsigned long flags)
-{
- if (raw_irqs_disabled_flags(flags))
- trace_hardirqs_off();
- else
- trace_hardirqs_on();
-}
-
-static inline void trace_hardirqs_fixup(void)
-{
- unsigned long flags = __raw_local_save_flags();
-
- trace_hardirqs_fixup_flags(flags);
-}
-
#else
#ifdef CONFIG_X86_64
diff --git a/include/asm-x86/kdebug.h b/include/asm-x86/kdebug.h
index 5ec3ad3..fbbab66 100644
--- a/include/asm-x86/kdebug.h
+++ b/include/asm-x86/kdebug.h
@@ -27,10 +27,9 @@ extern void printk_address(unsigned long address, int reliable);
extern void die(const char *, struct pt_regs *,long);
extern int __must_check __die(const char *, struct pt_regs *, long);
extern void show_registers(struct pt_regs *regs);
-extern void __show_registers(struct pt_regs *, int all);
extern void show_trace(struct task_struct *t, struct pt_regs *regs,
unsigned long *sp, unsigned long bp);
-extern void __show_regs(struct pt_regs *regs);
+extern void __show_regs(struct pt_regs *regs, int all);
extern void show_regs(struct pt_regs *regs);
extern unsigned long oops_begin(void);
extern void oops_end(unsigned long, struct pt_regs *, int signr);
diff --git a/include/asm-x86/kprobes.h b/include/asm-x86/kprobes.h
index bd84078..8a0748d 100644
--- a/include/asm-x86/kprobes.h
+++ b/include/asm-x86/kprobes.h
@@ -82,15 +82,6 @@ struct kprobe_ctlblk {
struct prev_kprobe prev_kprobe;
};
-/* trap3/1 are intr gates for kprobes. So, restore the status of IF,
- * if necessary, before executing the original int3/1 (trap) handler.
- */
-static inline void restore_interrupts(struct pt_regs *regs)
-{
- if (regs->flags & X86_EFLAGS_IF)
- local_irq_enable();
-}
-
extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
extern int kprobe_exceptions_notify(struct notifier_block *self,
unsigned long val, void *data);
diff --git a/include/asm-x86/mach-default/mach_traps.h b/include/asm-x86/mach-default/mach_traps.h
index de9ac3f..ff8778f 100644
--- a/include/asm-x86/mach-default/mach_traps.h
+++ b/include/asm-x86/mach-default/mach_traps.h
@@ -7,12 +7,6 @@
#include <asm/mc146818rtc.h>
-static inline void clear_mem_error(unsigned char reason)
-{
- reason = (reason & 0xf) | 4;
- outb(reason, 0x61);
-}
-
static inline unsigned char get_nmi_reason(void)
{
return inb(0x61);
diff --git a/include/asm-x86/mmzone_64.h b/include/asm-x86/mmzone_64.h
index 626b03a..6480f33 100644
--- a/include/asm-x86/mmzone_64.h
+++ b/include/asm-x86/mmzone_64.h
@@ -7,7 +7,7 @@
#ifdef CONFIG_NUMA
-#define VIRTUAL_BUG_ON(x)
+#include <linux/mmdebug.h>
#include <asm/smp.h>
@@ -29,7 +29,6 @@ static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
{
unsigned nid;
VIRTUAL_BUG_ON(!memnodemap);
- VIRTUAL_BUG_ON((addr >> memnode_shift) >= memnodemapsize);
nid = memnodemap[addr >> memnode_shift];
VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]);
return nid;
diff --git a/include/asm-x86/module.h b/include/asm-x86/module.h
index 48dc3e0..864f200 100644
--- a/include/asm-x86/module.h
+++ b/include/asm-x86/module.h
@@ -52,8 +52,6 @@ struct mod_arch_specific {};
#define MODULE_PROC_FAMILY "EFFICEON "
#elif defined CONFIG_MWINCHIPC6
#define MODULE_PROC_FAMILY "WINCHIPC6 "
-#elif defined CONFIG_MWINCHIP2
-#define MODULE_PROC_FAMILY "WINCHIP2 "
#elif defined CONFIG_MWINCHIP3D
#define MODULE_PROC_FAMILY "WINCHIP3D "
#elif defined CONFIG_MCYRIXIII
diff --git a/include/asm-x86/nmi.h b/include/asm-x86/nmi.h
index d5e715f..a53f829 100644
--- a/include/asm-x86/nmi.h
+++ b/include/asm-x86/nmi.h
@@ -15,10 +15,6 @@
*/
int do_nmi_callback(struct pt_regs *regs, int cpu);
-#ifdef CONFIG_X86_64
-extern void default_do_nmi(struct pt_regs *);
-#endif
-
extern void die_nmi(char *str, struct pt_regs *regs, int do_panic);
extern int check_nmi_watchdog(void);
extern int nmi_watchdog_enabled;
diff --git a/include/asm-x86/page.h b/include/asm-x86/page.h
index c915747..d4f1d57 100644
--- a/include/asm-x86/page.h
+++ b/include/asm-x86/page.h
@@ -179,6 +179,7 @@ static inline pteval_t native_pte_flags(pte_t pte)
#endif /* CONFIG_PARAVIRT */
#define __pa(x) __phys_addr((unsigned long)(x))
+#define __pa_nodebug(x) __phys_addr_nodebug((unsigned long)(x))
/* __pa_symbol should be used for C visible symbols.
This seems to be the official gcc blessed way to do such arithmetic. */
#define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x)))
@@ -188,9 +189,14 @@ static inline pteval_t native_pte_flags(pte_t pte)
#define __boot_va(x) __va(x)
#define __boot_pa(x) __pa(x)
+/*
+ * virt_to_page(kaddr) returns a valid pointer if and only if
+ * virt_addr_valid(kaddr) returns true.
+ */
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
-#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+extern bool __virt_addr_valid(unsigned long kaddr);
+#define virt_addr_valid(kaddr) __virt_addr_valid((unsigned long) (kaddr))
#endif /* __ASSEMBLY__ */
diff --git a/include/asm-x86/page_32.h b/include/asm-x86/page_32.h
index 72f7305..e8d80d1 100644
--- a/include/asm-x86/page_32.h
+++ b/include/asm-x86/page_32.h
@@ -20,6 +20,12 @@
#endif
#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
+#define STACKFAULT_STACK 0
+#define DOUBLEFAULT_STACK 1
+#define NMI_STACK 0
+#define DEBUG_STACK 0
+#define MCE_STACK 0
+#define N_EXCEPTION_STACKS 1
#ifdef CONFIG_X86_PAE
/* 44=32+12, the limit we can fit into an unsigned long pfn */
@@ -73,7 +79,12 @@ typedef struct page *pgtable_t;
#endif
#ifndef __ASSEMBLY__
-#define __phys_addr(x) ((x) - PAGE_OFFSET)
+#define __phys_addr_nodebug(x) ((x) - PAGE_OFFSET)
+#ifdef CONFIG_DEBUG_VIRTUAL
+extern unsigned long __phys_addr(unsigned long);
+#else
+#define __phys_addr(x) __phys_addr_nodebug(x)
+#endif
#define __phys_reloc_hide(x) RELOC_HIDE((x), 0)
#ifdef CONFIG_FLATMEM
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index d7d358a..8d6ae2f 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -124,6 +124,9 @@ struct pv_cpu_ops {
int entrynum, const void *desc, int size);
void (*write_idt_entry)(gate_desc *,
int entrynum, const gate_desc *gate);
+ void (*alloc_ldt)(struct desc_struct *ldt, unsigned entries);
+ void (*free_ldt)(struct desc_struct *ldt, unsigned entries);
+
void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
void (*set_iopl_mask)(unsigned mask);
@@ -325,6 +328,7 @@ struct pv_lock_ops {
int (*spin_is_locked)(struct raw_spinlock *lock);
int (*spin_is_contended)(struct raw_spinlock *lock);
void (*spin_lock)(struct raw_spinlock *lock);
+ void (*spin_lock_flags)(struct raw_spinlock *lock, unsigned long flags);
int (*spin_trylock)(struct raw_spinlock *lock);
void (*spin_unlock)(struct raw_spinlock *lock);
};
@@ -830,6 +834,16 @@ do { \
(aux) = __aux; \
} while (0)
+static inline void paravirt_alloc_ldt(struct desc_struct *ldt, unsigned entries)
+{
+ PVOP_VCALL2(pv_cpu_ops.alloc_ldt, ldt, entries);
+}
+
+static inline void paravirt_free_ldt(struct desc_struct *ldt, unsigned entries)
+{
+ PVOP_VCALL2(pv_cpu_ops.free_ldt, ldt, entries);
+}
+
static inline void load_TR_desc(void)
{
PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
@@ -1394,6 +1408,12 @@ static __always_inline void __raw_spin_lock(struct raw_spinlock *lock)
PVOP_VCALL1(pv_lock_ops.spin_lock, lock);
}
+static __always_inline void __raw_spin_lock_flags(struct raw_spinlock *lock,
+ unsigned long flags)
+{
+ PVOP_VCALL2(pv_lock_ops.spin_lock_flags, lock, flags);
+}
+
static __always_inline int __raw_spin_trylock(struct raw_spinlock *lock)
{
return PVOP_CALL1(int, pv_lock_ops.spin_trylock, lock);
diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h
index ed93245..182f9d4 100644
--- a/include/asm-x86/pgtable.h
+++ b/include/asm-x86/pgtable.h
@@ -15,7 +15,7 @@
#define _PAGE_BIT_PAT 7 /* on 4KB pages */
#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
#define _PAGE_BIT_UNUSED1 9 /* available for programmer */
-#define _PAGE_BIT_UNUSED2 10
+#define _PAGE_BIT_IOMAP 10 /* flag used to indicate IO mapping */
#define _PAGE_BIT_UNUSED3 11
#define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */
#define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1
@@ -32,7 +32,7 @@
#define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
#define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
#define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1)
-#define _PAGE_UNUSED2 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED2)
+#define _PAGE_IOMAP (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP)
#define _PAGE_UNUSED3 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED3)
#define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
#define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
@@ -99,6 +99,11 @@
#define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE)
#define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
+#define __PAGE_KERNEL_IO (__PAGE_KERNEL | _PAGE_IOMAP)
+#define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP)
+#define __PAGE_KERNEL_IO_UC_MINUS (__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP)
+#define __PAGE_KERNEL_IO_WC (__PAGE_KERNEL_WC | _PAGE_IOMAP)
+
#define PAGE_KERNEL __pgprot(__PAGE_KERNEL)
#define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO)
#define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
@@ -113,6 +118,11 @@
#define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL)
#define PAGE_KERNEL_VSYSCALL_NOCACHE __pgprot(__PAGE_KERNEL_VSYSCALL_NOCACHE)
+#define PAGE_KERNEL_IO __pgprot(__PAGE_KERNEL_IO)
+#define PAGE_KERNEL_IO_NOCACHE __pgprot(__PAGE_KERNEL_IO_NOCACHE)
+#define PAGE_KERNEL_IO_UC_MINUS __pgprot(__PAGE_KERNEL_IO_UC_MINUS)
+#define PAGE_KERNEL_IO_WC __pgprot(__PAGE_KERNEL_IO_WC)
+
/* xwr */
#define __P000 PAGE_NONE
#define __P001 PAGE_READONLY
@@ -196,7 +206,7 @@ static inline int pte_exec(pte_t pte)
static inline int pte_special(pte_t pte)
{
- return pte_val(pte) & _PAGE_SPECIAL;
+ return pte_flags(pte) & _PAGE_SPECIAL;
}
static inline unsigned long pte_pfn(pte_t pte)
diff --git a/include/asm-x86/ptrace.h b/include/asm-x86/ptrace.h
index ac578f1..a202552 100644
--- a/include/asm-x86/ptrace.h
+++ b/include/asm-x86/ptrace.h
@@ -174,12 +174,8 @@ extern unsigned long profile_pc(struct pt_regs *regs);
extern unsigned long
convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
-
-#ifdef CONFIG_X86_32
extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
int error_code, int si_code);
-#endif
-
void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
extern long syscall_trace_enter(struct pt_regs *);
diff --git a/include/asm-x86/smp.h b/include/asm-x86/smp.h
index 29324c1..a6afc29 100644
--- a/include/asm-x86/smp.h
+++ b/include/asm-x86/smp.h
@@ -50,12 +50,16 @@ extern struct {
struct smp_ops {
void (*smp_prepare_boot_cpu)(void);
void (*smp_prepare_cpus)(unsigned max_cpus);
- int (*cpu_up)(unsigned cpu);
void (*smp_cpus_done)(unsigned max_cpus);
void (*smp_send_stop)(void);
void (*smp_send_reschedule)(int cpu);
+ int (*cpu_up)(unsigned cpu);
+ int (*cpu_disable)(void);
+ void (*cpu_die)(unsigned int cpu);
+ void (*play_dead)(void);
+
void (*send_call_func_ipi)(cpumask_t mask);
void (*send_call_func_single_ipi)(int cpu);
};
@@ -94,6 +98,21 @@ static inline int __cpu_up(unsigned int cpu)
return smp_ops.cpu_up(cpu);
}
+static inline int __cpu_disable(void)
+{
+ return smp_ops.cpu_disable();
+}
+
+static inline void __cpu_die(unsigned int cpu)
+{
+ smp_ops.cpu_die(cpu);
+}
+
+static inline void play_dead(void)
+{
+ smp_ops.play_dead();
+}
+
static inline void smp_send_reschedule(int cpu)
{
smp_ops.smp_send_reschedule(cpu);
@@ -109,15 +128,20 @@ static inline void arch_send_call_function_ipi(cpumask_t mask)
smp_ops.send_call_func_ipi(mask);
}
+void cpu_disable_common(void);
void native_smp_prepare_boot_cpu(void);
void native_smp_prepare_cpus(unsigned int max_cpus);
void native_smp_cpus_done(unsigned int max_cpus);
int native_cpu_up(unsigned int cpunum);
+int native_cpu_disable(void);
+void native_cpu_die(unsigned int cpu);
+void native_play_dead(void);
+void play_dead_common(void);
+
void native_send_call_func_ipi(cpumask_t mask);
void native_send_call_func_single_ipi(int cpu);
-extern int __cpu_disable(void);
-extern void __cpu_die(unsigned int cpu);
+extern void prefill_possible_map(void);
void smp_store_cpu_info(int id);
#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
@@ -127,15 +151,11 @@ static inline int num_booting_cpus(void)
{
return cpus_weight(cpu_callout_map);
}
-#endif /* CONFIG_SMP */
-
-#if defined(CONFIG_SMP) && defined(CONFIG_HOTPLUG_CPU)
-extern void prefill_possible_map(void);
#else
static inline void prefill_possible_map(void)
{
}
-#endif
+#endif /* CONFIG_SMP */
extern unsigned disabled_cpus __cpuinitdata;
@@ -205,9 +225,5 @@ static inline int hard_smp_processor_id(void)
#endif /* CONFIG_X86_LOCAL_APIC */
-#ifdef CONFIG_HOTPLUG_CPU
-extern void cpu_uninit(void);
-#endif
-
#endif /* __ASSEMBLY__ */
#endif /* ASM_X86__SMP_H */
diff --git a/include/asm-x86/spinlock.h b/include/asm-x86/spinlock.h
index 93adae3..8badab0 100644
--- a/include/asm-x86/spinlock.h
+++ b/include/asm-x86/spinlock.h
@@ -182,8 +182,6 @@ static __always_inline void __ticket_spin_unlock(raw_spinlock_t *lock)
}
#endif
-#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
-
#ifdef CONFIG_PARAVIRT
/*
* Define virtualization-friendly old-style lock byte lock, for use in
@@ -272,6 +270,13 @@ static __always_inline void __raw_spin_unlock(raw_spinlock_t *lock)
{
__ticket_spin_unlock(lock);
}
+
+static __always_inline void __raw_spin_lock_flags(raw_spinlock_t *lock,
+ unsigned long flags)
+{
+ __raw_spin_lock(lock);
+}
+
#endif /* CONFIG_PARAVIRT */
static inline void __raw_spin_unlock_wait(raw_spinlock_t *lock)
diff --git a/include/asm-x86/system.h b/include/asm-x86/system.h
index 34505dd..b20c894 100644
--- a/include/asm-x86/system.h
+++ b/include/asm-x86/system.h
@@ -64,7 +64,10 @@ do { \
\
/* regparm parameters for __switch_to(): */ \
[prev] "a" (prev), \
- [next] "d" (next)); \
+ [next] "d" (next) \
+ \
+ : /* reloaded segment registers */ \
+ "memory"); \
} while (0)
/*
diff --git a/include/asm-x86/tlbflush.h b/include/asm-x86/tlbflush.h
index ef68b76..3cdd08b 100644
--- a/include/asm-x86/tlbflush.h
+++ b/include/asm-x86/tlbflush.h
@@ -119,6 +119,10 @@ static inline void native_flush_tlb_others(const cpumask_t *cpumask,
{
}
+static inline void reset_lazy_tlbstate(void)
+{
+}
+
#else /* SMP */
#include <asm/smp.h>
@@ -151,6 +155,12 @@ struct tlb_state {
char __cacheline_padding[L1_CACHE_BYTES-8];
};
DECLARE_PER_CPU(struct tlb_state, cpu_tlbstate);
+
+void reset_lazy_tlbstate(void);
+#else
+static inline void reset_lazy_tlbstate(void)
+{
+}
#endif
#endif /* SMP */
diff --git a/include/asm-x86/traps.h b/include/asm-x86/traps.h
index 7a692ba..6c3dc2c 100644
--- a/include/asm-x86/traps.h
+++ b/include/asm-x86/traps.h
@@ -3,7 +3,12 @@
#include <asm/debugreg.h>
-/* Common in X86_32 and X86_64 */
+#ifdef CONFIG_X86_32
+#define dotraplinkage
+#else
+#define dotraplinkage asmlinkage
+#endif
+
asmlinkage void divide_error(void);
asmlinkage void debug(void);
asmlinkage void nmi(void);
@@ -12,31 +17,47 @@ asmlinkage void overflow(void);
asmlinkage void bounds(void);
asmlinkage void invalid_op(void);
asmlinkage void device_not_available(void);
+#ifdef CONFIG_X86_64
+asmlinkage void double_fault(void);
+#endif
asmlinkage void coprocessor_segment_overrun(void);
asmlinkage void invalid_TSS(void);
asmlinkage void segment_not_present(void);
asmlinkage void stack_segment(void);
asmlinkage void general_protection(void);
asmlinkage void page_fault(void);
+asmlinkage void spurious_interrupt_bug(void);
asmlinkage void coprocessor_error(void);
-asmlinkage void simd_coprocessor_error(void);
asmlinkage void alignment_check(void);
-asmlinkage void spurious_interrupt_bug(void);
#ifdef CONFIG_X86_MCE
asmlinkage void machine_check(void);
#endif /* CONFIG_X86_MCE */
+asmlinkage void simd_coprocessor_error(void);
-void do_divide_error(struct pt_regs *, long);
-void do_overflow(struct pt_regs *, long);
-void do_bounds(struct pt_regs *, long);
-void do_coprocessor_segment_overrun(struct pt_regs *, long);
-void do_invalid_TSS(struct pt_regs *, long);
-void do_segment_not_present(struct pt_regs *, long);
-void do_stack_segment(struct pt_regs *, long);
-void do_alignment_check(struct pt_regs *, long);
-void do_invalid_op(struct pt_regs *, long);
-void do_general_protection(struct pt_regs *, long);
-void do_nmi(struct pt_regs *, long);
+dotraplinkage void do_divide_error(struct pt_regs *, long);
+dotraplinkage void do_debug(struct pt_regs *, long);
+dotraplinkage void do_nmi(struct pt_regs *, long);
+dotraplinkage void do_int3(struct pt_regs *, long);
+dotraplinkage void do_overflow(struct pt_regs *, long);
+dotraplinkage void do_bounds(struct pt_regs *, long);
+dotraplinkage void do_invalid_op(struct pt_regs *, long);
+dotraplinkage void do_device_not_available(struct pt_regs *, long);
+dotraplinkage void do_coprocessor_segment_overrun(struct pt_regs *, long);
+dotraplinkage void do_invalid_TSS(struct pt_regs *, long);
+dotraplinkage void do_segment_not_present(struct pt_regs *, long);
+dotraplinkage void do_stack_segment(struct pt_regs *, long);
+dotraplinkage void do_general_protection(struct pt_regs *, long);
+dotraplinkage void do_page_fault(struct pt_regs *, unsigned long);
+dotraplinkage void do_spurious_interrupt_bug(struct pt_regs *, long);
+dotraplinkage void do_coprocessor_error(struct pt_regs *, long);
+dotraplinkage void do_alignment_check(struct pt_regs *, long);
+#ifdef CONFIG_X86_MCE
+dotraplinkage void do_machine_check(struct pt_regs *, long);
+#endif
+dotraplinkage void do_simd_coprocessor_error(struct pt_regs *, long);
+#ifdef CONFIG_X86_32
+dotraplinkage void do_iret_error(struct pt_regs *, long);
+#endif
static inline int get_si_code(unsigned long condition)
{
@@ -52,31 +73,9 @@ extern int panic_on_unrecovered_nmi;
extern int kstack_depth_to_print;
#ifdef CONFIG_X86_32
-
-void do_iret_error(struct pt_regs *, long);
-void do_int3(struct pt_regs *, long);
-void do_debug(struct pt_regs *, long);
void math_error(void __user *);
-void do_coprocessor_error(struct pt_regs *, long);
-void do_simd_coprocessor_error(struct pt_regs *, long);
-void do_spurious_interrupt_bug(struct pt_regs *, long);
unsigned long patch_espfix_desc(unsigned long, unsigned long);
asmlinkage void math_emulate(long);
+#endif
-void do_page_fault(struct pt_regs *regs, unsigned long error_code);
-
-#else /* CONFIG_X86_32 */
-
-asmlinkage void double_fault(void);
-
-asmlinkage void do_int3(struct pt_regs *, long);
-asmlinkage void do_stack_segment(struct pt_regs *, long);
-asmlinkage void do_debug(struct pt_regs *, unsigned long);
-asmlinkage void do_coprocessor_error(struct pt_regs *);
-asmlinkage void do_simd_coprocessor_error(struct pt_regs *);
-asmlinkage void do_spurious_interrupt_bug(struct pt_regs *);
-
-asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code);
-
-#endif /* CONFIG_X86_32 */
#endif /* ASM_X86__TRAPS_H */
diff --git a/include/asm-x86/xen/hypervisor.h b/include/asm-x86/xen/hypervisor.h
index 0ef3a88..445a247 100644
--- a/include/asm-x86/xen/hypervisor.h
+++ b/include/asm-x86/xen/hypervisor.h
@@ -54,7 +54,6 @@
/* arch/i386/kernel/setup.c */
extern struct shared_info *HYPERVISOR_shared_info;
extern struct start_info *xen_start_info;
-#define is_initial_xendomain() (xen_start_info->flags & SIF_INITDOMAIN)
/* arch/i386/mach-xen/evtchn.c */
/* Force a proper event-channel callback from Xen. */
@@ -67,6 +66,17 @@ u64 jiffies_to_st(unsigned long jiffies);
#define MULTI_UVMFLAGS_INDEX 3
#define MULTI_UVMDOMID_INDEX 4
-#define is_running_on_xen() (xen_start_info ? 1 : 0)
+enum xen_domain_type {
+ XEN_NATIVE,
+ XEN_PV_DOMAIN,
+ XEN_HVM_DOMAIN,
+};
+
+extern enum xen_domain_type xen_domain_type;
+
+#define xen_domain() (xen_domain_type != XEN_NATIVE)
+#define xen_pv_domain() (xen_domain_type == XEN_PV_DOMAIN)
+#define xen_initial_domain() (xen_pv_domain() && xen_start_info->flags & SIF_INITDOMAIN)
+#define xen_hvm_domain() (xen_domain_type == XEN_HVM_DOMAIN)
#endif /* ASM_X86__XEN__HYPERVISOR_H */
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 2651f80..75d81f1 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -182,7 +182,7 @@ extern int vsscanf(const char *, const char *, va_list)
extern int get_option(char **str, int *pint);
extern char *get_options(const char *str, int nints, int *ints);
-extern unsigned long long memparse(char *ptr, char **retptr);
+extern unsigned long long memparse(const char *ptr, char **retptr);
extern int core_kernel_text(unsigned long addr);
extern int __kernel_text_address(unsigned long addr);
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 72a15dc..c61ba10 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -7,6 +7,7 @@
#include <linux/gfp.h>
#include <linux/list.h>
+#include <linux/mmdebug.h>
#include <linux/mmzone.h>
#include <linux/rbtree.h>
#include <linux/prio_tree.h>
@@ -219,12 +220,6 @@ struct inode;
*/
#include <linux/page-flags.h>
-#ifdef CONFIG_DEBUG_VM
-#define VM_BUG_ON(cond) BUG_ON(cond)
-#else
-#define VM_BUG_ON(condition) do { } while(0)
-#endif
-
/*
* Methods to modify the page usage count.
*
@@ -919,7 +914,7 @@ static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long a
}
#endif /* CONFIG_MMU && !__ARCH_HAS_4LEVEL_HACK */
-#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
+#if USE_SPLIT_PTLOCKS
/*
* We tuck a spinlock to guard each pagetable page into its struct page,
* at page->private, with BUILD_BUG_ON to make sure that this will not
@@ -932,14 +927,14 @@ static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long a
} while (0)
#define pte_lock_deinit(page) ((page)->mapping = NULL)
#define pte_lockptr(mm, pmd) ({(void)(mm); __pte_lockptr(pmd_page(*(pmd)));})
-#else
+#else /* !USE_SPLIT_PTLOCKS */
/*
* We use mm->page_table_lock to guard all pagetable pages of the mm.
*/
#define pte_lock_init(page) do {} while (0)
#define pte_lock_deinit(page) do {} while (0)
#define pte_lockptr(mm, pmd) ({(void)(pmd); &(mm)->page_table_lock;})
-#endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
+#endif /* USE_SPLIT_PTLOCKS */
static inline void pgtable_page_ctor(struct page *page)
{
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index bf33413..9d49fa3 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -21,11 +21,13 @@
struct address_space;
-#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
+#define USE_SPLIT_PTLOCKS (NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS)
+
+#if USE_SPLIT_PTLOCKS
typedef atomic_long_t mm_counter_t;
-#else /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
+#else /* !USE_SPLIT_PTLOCKS */
typedef unsigned long mm_counter_t;
-#endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
+#endif /* !USE_SPLIT_PTLOCKS */
/*
* Each physical page in the system has a struct page associated with
@@ -65,7 +67,7 @@ struct page {
* see PAGE_MAPPING_ANON below.
*/
};
-#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
+#if USE_SPLIT_PTLOCKS
spinlock_t ptl;
#endif
struct kmem_cache *slab; /* SLUB: Pointer to slab */
diff --git a/include/linux/mmdebug.h b/include/linux/mmdebug.h
new file mode 100644
index 0000000..8a55098
--- /dev/null
+++ b/include/linux/mmdebug.h
@@ -0,0 +1,18 @@
+#ifndef LINUX_MM_DEBUG_H
+#define LINUX_MM_DEBUG_H 1
+
+#include <linux/autoconf.h>
+
+#ifdef CONFIG_DEBUG_VM
+#define VM_BUG_ON(cond) BUG_ON(cond)
+#else
+#define VM_BUG_ON(cond) do { } while (0)
+#endif
+
+#ifdef CONFIG_DEBUG_VIRTUAL
+#define VIRTUAL_BUG_ON(cond) BUG_ON(cond)
+#else
+#define VIRTUAL_BUG_ON(cond) do { } while (0)
+#endif
+
+#endif
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 3d9120c..272c353 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -352,7 +352,7 @@ arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
extern void arch_unmap_area(struct mm_struct *, unsigned long);
extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);
-#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
+#if USE_SPLIT_PTLOCKS
/*
* The mm counters are not protected by its page_table_lock,
* so must be incremented atomically.
@@ -363,7 +363,7 @@ extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);
#define inc_mm_counter(mm, member) atomic_long_inc(&(mm)->_##member)
#define dec_mm_counter(mm, member) atomic_long_dec(&(mm)->_##member)
-#else /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
+#else /* !USE_SPLIT_PTLOCKS */
/*
* The mm counters are protected by its page_table_lock,
* so can be incremented directly.
@@ -374,7 +374,7 @@ extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);
#define inc_mm_counter(mm, member) (mm)->_##member++
#define dec_mm_counter(mm, member) (mm)->_##member--
-#endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
+#endif /* !USE_SPLIT_PTLOCKS */
#define get_mm_rss(mm) \
(get_mm_counter(mm, file_rss) + get_mm_counter(mm, anon_rss))
diff --git a/include/xen/events.h b/include/xen/events.h
index 4680ff3..0d5f1ad 100644
--- a/include/xen/events.h
+++ b/include/xen/events.h
@@ -46,6 +46,8 @@ extern void xen_irq_resume(void);
/* Clear an irq's pending state, in preparation for polling on it */
void xen_clear_irq_pending(int irq);
+void xen_set_irq_pending(int irq);
+bool xen_test_irq_pending(int irq);
/* Poll waiting for an irq to become pending. In the usual case, the
irq will be disabled so it won't deliver an interrupt. */
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 0b50481..082235b 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -495,6 +495,15 @@ config DEBUG_VM
If unsure, say N.
+config DEBUG_VIRTUAL
+ bool "Debug VM translations"
+ depends on DEBUG_KERNEL && X86
+ help
+ Enable some costly sanity checks in virtual to page code. This can
+ catch mistakes with virt_to_page() and friends.
+
+ If unsure, say N.
+
config DEBUG_WRITECOUNT
bool "Debug filesystem writers count"
depends on DEBUG_KERNEL
diff --git a/lib/cmdline.c b/lib/cmdline.c
index 5ba8a94..f5f3ad8 100644
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -126,7 +126,7 @@ char *get_options(const char *str, int nints, int *ints)
* megabyte, or one gigabyte, respectively.
*/
-unsigned long long memparse(char *ptr, char **retptr)
+unsigned long long memparse(const char *ptr, char **retptr)
{
char *endptr; /* local pointer to end of parsed string */
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 85b9a0d..bba06c4 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -180,6 +180,13 @@ struct page *vmalloc_to_page(const void *vmalloc_addr)
pmd_t *pmd;
pte_t *ptep, pte;
+ /*
+ * XXX we might need to change this if we add VIRTUAL_BUG_ON for
+ * architectures that do not vmalloc module space
+ */
+ VIRTUAL_BUG_ON(!is_vmalloc_addr(vmalloc_addr) &&
+ !is_module_address(addr));
+
if (!pgd_none(*pgd)) {
pud = pud_offset(pgd, addr);
if (!pud_none(*pud)) {
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [git pull] x86 updates for v2.6.28, phase #6, misc
2008-10-10 0:08 [git pull] x86 updates for v2.6.28, phase #6, misc Ingo Molnar
@ 2008-10-10 3:43 ` Nick Piggin
2008-10-10 4:18 ` Jeremy Fitzhardinge
2008-10-10 18:41 ` [git pull, take 2] " Ingo Molnar
1 sibling, 1 reply; 6+ messages in thread
From: Nick Piggin @ 2008-10-10 3:43 UTC (permalink / raw)
To: Ingo Molnar
Cc: Linus Torvalds, linux-kernel, Andrew Morton, Thomas Gleixner,
H. Peter Anvin
On Friday 10 October 2008 11:08, Ingo Molnar wrote:
> out-of-topic modifications in x86-v28-for-linus-phase6:
> -------------------------------------------------------
> include/linux/kernel.h # d974ae3: generic, memparse(): constify
> arg include/linux/mm.h # f7d0b92: mm: define
> USE_SPLIT_PTLOCKS rath # 59ea746: MM: virtual address debug
> include/linux/mm_types.h # f7d0b92: mm: define USE_SPLIT_PTLOCKS
> rath include/linux/mmdebug.h # 7aa413d: x86, MM: virtual address
> debug, c # 59ea746: MM: virtual address debug lib/cmdline.c
> # d974ae3: generic, memparse(): constify arg mm/vmalloc.c
> # 7aa413d: x86, MM: virtual address debug, c # 59ea746: MM:
> virtual address debug
How come these kinds of things go into the x86 tree? Can't they
be sent to other maintainer first (probably Andrew, in the case
of random -mm stuff).
OK, it's pretty trivial stuff, but just on principle I can't see
an advantage, and only disadvantages to doing this (and also I
see the vmalloc change clashed with the vmalloc rewrite in -mm).
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [git pull] x86 updates for v2.6.28, phase #6, misc
2008-10-10 3:43 ` Nick Piggin
@ 2008-10-10 4:18 ` Jeremy Fitzhardinge
2008-10-10 8:26 ` Ingo Molnar
0 siblings, 1 reply; 6+ messages in thread
From: Jeremy Fitzhardinge @ 2008-10-10 4:18 UTC (permalink / raw)
To: Nick Piggin
Cc: Ingo Molnar, Linus Torvalds, linux-kernel, Andrew Morton,
Thomas Gleixner, H. Peter Anvin
Nick Piggin wrote:
> On Friday 10 October 2008 11:08, Ingo Molnar wrote:
>
>
>> out-of-topic modifications in x86-v28-for-linus-phase6:
>> -------------------------------------------------------
>> include/linux/kernel.h # d974ae3: generic, memparse(): constify
>> arg include/linux/mm.h # f7d0b92: mm: define
>> USE_SPLIT_PTLOCKS rath # 59ea746: MM: virtual address debug
>> include/linux/mm_types.h # f7d0b92: mm: define USE_SPLIT_PTLOCKS
>> rath include/linux/mmdebug.h # 7aa413d: x86, MM: virtual address
>> debug, c # 59ea746: MM: virtual address debug lib/cmdline.c
>> # d974ae3: generic, memparse(): constify arg mm/vmalloc.c
>> # 7aa413d: x86, MM: virtual address debug, c # 59ea746: MM:
>> virtual address debug
>>
>
>
> How come these kinds of things go into the x86 tree? Can't they
> be sent to other maintainer first (probably Andrew, in the case
> of random -mm stuff).
>
> OK, it's pretty trivial stuff, but just on principle I can't see
> an advantage, and only disadvantages to doing this (and also I
> see the vmalloc change clashed with the vmalloc rewrite in -mm).
The memparse and split ptlocks changes went past Andrew. They ended up
in Ingo's tree because 1) they're pretty trivial, and 2) there's
x86-specific stuff which depends on them. Don't know about the vmalloc
change.
J
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [git pull] x86 updates for v2.6.28, phase #6, misc
2008-10-10 4:18 ` Jeremy Fitzhardinge
@ 2008-10-10 8:26 ` Ingo Molnar
2008-10-11 3:44 ` Nick Piggin
0 siblings, 1 reply; 6+ messages in thread
From: Ingo Molnar @ 2008-10-10 8:26 UTC (permalink / raw)
To: Jeremy Fitzhardinge
Cc: Nick Piggin, Linus Torvalds, linux-kernel, Andrew Morton,
Thomas Gleixner, H. Peter Anvin
* Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> Nick Piggin wrote:
>> On Friday 10 October 2008 11:08, Ingo Molnar wrote:
>>
>>
>>> out-of-topic modifications in x86-v28-for-linus-phase6:
>>> -------------------------------------------------------
>>> include/linux/kernel.h # d974ae3: generic, memparse(): constify
>>> arg include/linux/mm.h # f7d0b92: mm: define
>>> USE_SPLIT_PTLOCKS rath # 59ea746: MM: virtual address debug
>>> include/linux/mm_types.h # f7d0b92: mm: define USE_SPLIT_PTLOCKS
>>> rath include/linux/mmdebug.h # 7aa413d: x86, MM: virtual address
>>> debug, c # 59ea746: MM: virtual address debug lib/cmdline.c
>>> # d974ae3: generic, memparse(): constify arg mm/vmalloc.c
>>> # 7aa413d: x86, MM: virtual address debug, c #
>>> 59ea746: MM:
>>> virtual address debug
>>>
>>
>>
>> How come these kinds of things go into the x86 tree? Can't they
>> be sent to other maintainer first (probably Andrew, in the case
>> of random -mm stuff).
>>
>> OK, it's pretty trivial stuff, but just on principle I can't see
>> an advantage, and only disadvantages to doing this (and also I
>> see the vmalloc change clashed with the vmalloc rewrite in -mm).
>
> The memparse and split ptlocks changes went past Andrew. They ended
> up in Ingo's tree because 1) they're pretty trivial, and 2) there's
> x86-specific stuff which depends on them. Don't know about the
> vmalloc change.
yeah, correct, as Jeremy already noted they had dependencies with PAT
and other ioremap relevant changes in the x86 tree so it had to be
layered.
Nevertheless they are in their separate tree as well: tip/x86/mm-debug.
Here's the relevant commits:
5f5ddc2: Merge branch 'x86/core' into x86/mm-debug
daa9176: Merge branch 'linus' into x86/mm-debug
7aa413d: x86, MM: virtual address debug, cleanups
a1bf963: x86, MM: virtual address debug, v2
59ea746: MM: virtual address debug
if you look at the diffstat:
arch/x86/kernel/doublefault_32.c | 2 +-
arch/x86/mm/ioremap.c | 33 ++++++++++++++++++++++++++-------
include/asm-x86/mmzone_64.h | 3 +--
include/asm-x86/page_32.h | 5 +++++
include/linux/mm.h | 7 +------
include/linux/mmdebug.h | 18 ++++++++++++++++++
lib/Kconfig.debug | 9 +++++++++
mm/vmalloc.c | 7 +++++++
8 files changed, 68 insertions(+), 16 deletions(-)
it's 90% x86 relevant and we obviously wanted it well-tested, and as can
be seen from the log our caution to keep this separated was prudent: the
v1 version of this patch caused crashes.
Since this was rather trivial and was pending in the last cycle already
so i didnt send a separate pull request - i already erred on the side of
sending too many pull requests than too few.
If we sent a separate pull request for every tree we maintain we'd have
to send 96 pull requests to Linus in this cycle (!), for all these topic
trees:
core/debug core/futexes core/lib core/locking core/misc core/percpu
core/printk core/rcu core/resources core/signal core/softirq
core/softlockup core/xen cpus4096 fastboot genirq irq/sparseirq
kmemcheck kmemcheck-bitfields kmemcheck2 oprofile out-of-tree
safe-poison-pointers sched/core sched/cpu-hotplug sched/cpusets
sched/devel sched/rt stackprotector timers/clockevents
timers/clocksource timers/hpet timers/hpet-percpu timers/hrtimers
timers/ntp timers/posixtimers tracing/core tracing/fastboot
tracing/ftrace tracing/markers tracing/mmiotrace tracing/nmisafe
tracing/pipe tracing/ring-buffer tracing/stack-tracer tracing/urgent
usb-for-greg x86/alternatives x86/apic x86/build x86/cleanups
x86/commandline x86/core x86/cpu x86/crashdump x86/debug x86/defconfig
x86/devel x86/doc x86/dumpstack x86/early-printk x86/exports x86/gart
x86/header-guards x86/idle x86/iommu x86/memory-corruption-check
x86/microcode x86/mm x86/mm-debug x86/mtrr x86/nmi-watchdog
x86/oprofile x86/paravirt x86/pat x86/pci-ioapic-boot-irq-quirks
x86/pebs x86/prototypes x86/ptrace x86/quirks x86/reboot x86/setup
x86/signal x86/sparse-fixes x86/spinlocks x86/time x86/tracehook
x86/traps x86/tsc x86/unify-cpu-detect x86/urgent x86/uv x86/vmalloc
x86/x2apic x86/xen x86/xsave
And Stephen and Andrew would have to resolve conflicts and dependencies
between 96 separate trees.
So we try to settle for some reasonable middle ground.
Ingo
^ permalink raw reply [flat|nested] 6+ messages in thread
* [git pull, take 2] x86 updates for v2.6.28, phase #6, misc
2008-10-10 0:08 [git pull] x86 updates for v2.6.28, phase #6, misc Ingo Molnar
2008-10-10 3:43 ` Nick Piggin
@ 2008-10-10 18:41 ` Ingo Molnar
1 sibling, 0 replies; 6+ messages in thread
From: Ingo Molnar @ 2008-10-10 18:41 UTC (permalink / raw)
To: Linus Torvalds
Cc: linux-kernel, Andrew Morton, Thomas Gleixner, H. Peter Anvin
* Ingo Molnar <mingo@elte.hu> wrote:
> Linus,
>
> Please pull the latest x86-v28-for-linus-phase6 git tree from:
>
> tip/x86/core: various x86 updates independent of the sparse irqs support
> tree.
updated pull request below. Beyond the x86/pat updates, it grew these
fresh commits:
43603c8: x86, debug: print more information about unknown CPUs
6bee185: Merge branch 'x86/quirks' into x86/core
8d89adf: x86: SB450: deprioritize DMI quirks
33fb0e4: x86: SB450: skip IRQ0 override if it is not routed to INT2 of IOAPIC
pull request is relative to x86-v28-for-linus-phase5-B.
Ingo
----------------->
Linus,
Please pull the latest x86-v28-for-linus-phase6-B git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git x86-v28-for-linus-phase6-B
out-of-topic modifications in x86-v28-for-linus-phase6-B:
---------------------------------------------------------
include/linux/kernel.h # d974ae3: generic, memparse(): constify arg
include/linux/mm.h # f7d0b92: mm: define USE_SPLIT_PTLOCKS rath
# 59ea746: MM: virtual address debug
include/linux/mm_types.h # f7d0b92: mm: define USE_SPLIT_PTLOCKS rath
include/linux/mmdebug.h # 7aa413d: x86, MM: virtual address debug, c
# 59ea746: MM: virtual address debug
lib/cmdline.c # d974ae3: generic, memparse(): constify arg
mm/vmalloc.c # 7aa413d: x86, MM: virtual address debug, c
# 59ea746: MM: virtual address debug
Thanks,
Ingo
------------------>
Alex Nixon (10):
x86: add cpu hotplug hooks into smp_ops
x86_32: clean up play_dead
x86: unify x86_32 and x86_64 play_dead into one function
x86: separate generic cpu disabling code from APIC writes in cpu_disable
xen: implement CPU hotplugging
Xen: fix cpu_hotplug.c build by replacing is_running_on_xen() with xen_pv_domain()
Xen: fix cpu_hotplug build when !CONFIG_SMP
x86: build fix for !CONFIG_SMP
x86, xen: fix build when !CONFIG_HOTPLUG_CPU
xen: make CPU hotplug functions static
Alexander van Heukelum (47):
i386: remove kprobes' restore_interrupts in favour of conditional_sti
i386: prepare to convert exceptions to interrupts
i386: convert hardware exception 0 to an interrupt gate
i386: expand exception 3 DO_TRAP macro
i386: convert hardware exception 4 to an interrupt gate
i386: convert hardware exception 5 to an interrupt gate
i386: convert hardware exception 6 to an interrupt gate
i386: convert hardware exception 7 to an interrupt gate
i386: convert hardware exception 9 to an interrupt gate
i386: convert hardware exception 10 to an interrupt gate
i386: convert hardware exception 11 to an interrupt gate
i386: convert hardware exception 12 to an interrupt gate
i386: convert hardware exception 13 to an interrupt gate
i386: convert hardware exception 15 to an interrupt gate
i386: convert hardware exception 16 to an interrupt gate
i386: convert hardware exception 17 to an interrupt gate
i386: convert hardware exception 18 to an interrupt gate
i386: convert hardware exception 19 to an interrupt gate
i386: remove temporary DO_TRAP macros, expanding the last one used
i386: add TRACE_IRQS_OFF to entry_32.S in 'error_code'
i386: add TRACE_IRQS_OFF for exception 1 (debug)
i386: add TRACE_IRQS_OFF for the nmi
i386: add TRACE_IRQS_OFF for the exception 3 (int3)
i386: trace_hardirqs_fixup should now not be necessary: irqs are off.
traps: x86_64: add TRACE_IRQS_OFF in error_entry
traps: x86_64: add TRACE_IRQS_OFF in paranoidentry macro
traps: x86_64: remove trace_hardirqs_fixup from DO_ERROR_INFO macro
traps: x86_64: remove trace_hardirqs_fixup from int3 handler
traps: x86_64: remove trace_hardirqs_fixup from debug handler
traps: x86: remove trace_hardirqs_fixup from pagefault handler
traps: i386: make do_trap more like x86_64
i386: split out dumpstack code from traps_32.c
x86_64: split out dumpstack code from traps_64.c
fix: x86: remove cpu_vendor_dev
x86, traps: split out math_error and simd_math_error
x86, traps, i386: factor out lazy io-bitmap copy
x86, traps: introduce dotraplinkage
x86, traps: converge do_debug handlers
traps: x86: converge trap_init functions
traps: x86_64: make math_state_restore more like i386
traps: i386: use preempt_conditional_sti/cli in do_int3
traps: x86_64: make io_check_error equal to the one on i386
traps: i386: expand clear_mem_error and remove from mach_traps.h
traps: x86_64: use task_pid_nr(tsk) instead of tsk->pid in do_general_protection
traps: x86: various noop-changes preparing for unification of traps_xx.c
traps: x86: make traps_32.c and traps_64.c equal
traps: x86: finalize unification of traps.c
Andreas Herrmann (1):
x86: SB450: skip IRQ0 override if it is not routed to INT2 of IOAPIC
Chuck Ebbert (2):
x86: move prefill_possible_map calling early, fix, V2
x86: allow number of additional hotplug CPUs to be set at compile time, V2
Cyrill Gorcunov (1):
x86: smpboot - check if we have ESR register in wakeup_secondary_cpu
Eduardo Habkost (2):
x86, xen: Use native_pte_flags instead of native_pte_val for .pte_flags
xen_alloc_ptpage: cast PFN_PHYS() argument to unsigned long
Ingo Molnar (11):
x86, MM: virtual address debug, cleanups
x86: x86_{phys,virt}_bits field also for i386, fix
Revert "x86: x86_{phys,virt}_bits field also for i386, fix"
Revert "x86: x86_{phys,virt}_bits field also for i386 (v2)"
x86: print out EBDA/lowmem address
x86: add PCI IDs for AMD Barcelona PCI devices
x86: __show_registers() and __show_regs() API unification, fixlet
x86: remove additional_cpus configurability
Revert "acpi/x86: introduce __apci_map_table, v4"
Revert "acpi: remove final __acpi_map_table mapping before setting acpi_gbl_permanent_mmap"
x86: SB450: deprioritize DMI quirks
Jack Steiner (1):
x86, UV: new UV genapic functions for x2apic
Jan Beulich (7):
x86: adjust vmalloc_sync_all() for Xen (2nd try)
x86-64: reduce boot fixmap space
x86-64: slightly stream-line 32-bit syscall entry code
x86: x86_{phys,virt}_bits field also for i386 (v2)
x86-64: fix combining of regions in init_memory_mapping()
x86: make mm/gup.c more virtualization friendly
x86: adjust dependencies for CONFIG_X86_CMOV
Jeremy Fitzhardinge (30):
x86/paravirt/xen: properly fill out the ldt ops
x86: split spinlock implementations out into their own files
x86: fix initialization of 'l' bit in ldt descriptors
xen: fix allocation and use of large ldts
generic, memparse(): constify argument
xen-balloon: fix up sysfs issues
xen-balloon: clean up unused functions
xen: suppress known wrmsrs
xen: compile irq functions without -pg for ftrace
xen: fix allocation and use of large ldts, cleanup
xen: clean up domain mode predicates
x86/paravirt: add spin_lock_flags lock op
xen: clarify locking used when pinning a pagetable.
xen: add xen_ prefixes to make tracing with ftrace easier
xen: save previous spinlock when blocking
xen: add debugfs support
xen: allow interrupts to be enabled while doing a blocking spin
xen: measure how long spinlocks spend blocking
x86: build fix in "xen spinlock updates and performance measurements"
x86: export pv_lock_ops non-GPL
x86: add _PAGE_IOMAP pte flag for IO mappings
x86: remove duplicate early_ioremap declarations
x86: add early_memremap()
x86: use early_memremap() in setup.c
x86-64: don't check for map replacement
x86: use early_ioremap in __acpi_map_table
x86: always explicitly map acpi memory
mm: define USE_SPLIT_PTLOCKS rather than repeating expression
xen: fix pinning when not using split pte locks
acpi: remove final __acpi_map_table mapping before setting acpi_gbl_permanent_mmap
Jiri Slaby (2):
MM: virtual address debug
x86, MM: virtual address debug, v2
Krzysztof Helt (2):
x86: merge winchip-2 and winchip-2a cpu choices
x86: do not allow to optimize flag_is_changeable_p() (rev. 2)
Manfred Spraul (1):
arch/x86/kernel/smpboot.c: Clarify when irq processing begins.
Pekka Enberg (1):
x86: __show_registers() and __show_regs() API unification
Thomas Gleixner (2):
x86: improve UP kernel when CPU-hotplug and SMP is enabled
x86: remove additional_cpus
Vegard Nossum (2):
x86: add memory clobber in switch_to()
x86: fix virt_addr_valid() with CONFIG_DEBUG_VIRTUAL=y, v2
Yinghai Lu (5):
x86: rename discontig_32.c to numa_32.c
x86: change early_ioremap to use slots instead of nesting
acpi/x86: introduce __apci_map_table, v4
x86: check dsdt before find oem table for es7000, v2
x86: cpu don't print duplicated vendor string
arch/x86/Kconfig.cpu | 29 +-
arch/x86/Makefile_32.cpu | 1 -
arch/x86/configs/i386_defconfig | 1 -
arch/x86/configs/x86_64_defconfig | 1 -
arch/x86/ia32/ia32entry.S | 26 +-
arch/x86/kernel/Makefile | 6 +-
arch/x86/kernel/acpi/boot.c | 42 +-
arch/x86/kernel/alternative.c | 2 +-
arch/x86/kernel/cpu/common.c | 48 +-
arch/x86/kernel/doublefault_32.c | 2 +-
arch/x86/kernel/dumpstack_32.c | 422 ++++++++++
arch/x86/kernel/dumpstack_64.c | 565 ++++++++++++++
arch/x86/kernel/early-quirks.c | 48 ++
arch/x86/kernel/entry_32.S | 22 +-
arch/x86/kernel/entry_64.S | 8 +-
arch/x86/kernel/es7000_32.c | 28 +-
arch/x86/kernel/genx2apic_uv_x.c | 10 +-
arch/x86/kernel/head.c | 1 +
arch/x86/kernel/ldt.c | 9 +-
arch/x86/kernel/paravirt-spinlocks.c | 37 +
arch/x86/kernel/paravirt.c | 27 +-
arch/x86/kernel/process_32.c | 768 ------------------
arch/x86/kernel/process_64.c | 37 +-
arch/x86/kernel/setup.c | 8 +-
arch/x86/kernel/smp.c | 6 +-
arch/x86/kernel/smpboot.c | 164 +++--
arch/x86/kernel/tlb_32.c | 8 +
arch/x86/kernel/{traps_32.c => traps.c} | 860 ++++++++-------------
arch/x86/kernel/traps_64.c | 1214 -----------------------------
arch/x86/kernel/vmlinux_64.lds.S | 2 +-
arch/x86/mach-generic/es7000.c | 20 +-
arch/x86/mm/Makefile | 6 +-
arch/x86/mm/fault.c | 19 +-
arch/x86/mm/gup.c | 10 +-
arch/x86/mm/init_32.c | 2 +-
arch/x86/mm/init_64.c | 9 +-
arch/x86/mm/ioremap.c | 168 ++++-
arch/x86/mm/{discontig_32.c => numa_32.c} | 0
arch/x86/xen/Kconfig | 10 +-
arch/x86/xen/Makefile | 12 +-
arch/x86/xen/debugfs.c | 123 +++
arch/x86/xen/debugfs.h | 10 +
arch/x86/xen/enlighten.c | 189 ++---
arch/x86/xen/irq.c | 143 ++++
arch/x86/xen/mmu.c | 270 ++++++-
arch/x86/xen/multicalls.c | 115 +++-
arch/x86/xen/smp.c | 245 ++-----
arch/x86/xen/spinlock.c | 428 ++++++++++
arch/x86/xen/time.c | 12 +-
arch/x86/xen/xen-asm_32.S | 2 +-
arch/x86/xen/xen-asm_64.S | 2 +-
arch/x86/xen/xen-ops.h | 8 +
drivers/block/xen-blkfront.c | 2 +-
drivers/char/hvc_xen.c | 6 +-
drivers/input/xen-kbdfront.c | 4 +-
drivers/net/xen-netfront.c | 6 +-
drivers/video/xen-fbfront.c | 4 +-
drivers/xen/Makefile | 1 +
drivers/xen/balloon.c | 174 +----
drivers/xen/cpu_hotplug.c | 90 +++
drivers/xen/events.c | 40 +-
drivers/xen/grant-table.c | 2 +-
drivers/xen/xenbus/xenbus_probe.c | 8 +-
include/asm-x86/acpi.h | 3 -
include/asm-x86/desc.h | 29 +-
include/asm-x86/dma-mapping.h | 1 -
include/asm-x86/es7000/mpparse.h | 1 +
include/asm-x86/fixmap_32.h | 8 +-
include/asm-x86/fixmap_64.h | 16 +-
include/asm-x86/io.h | 15 +-
include/asm-x86/io_64.h | 3 -
include/asm-x86/irqflags.h | 21 -
include/asm-x86/kdebug.h | 3 +-
include/asm-x86/kprobes.h | 9 -
include/asm-x86/mach-default/mach_traps.h | 6 -
include/asm-x86/mmzone_64.h | 3 +-
include/asm-x86/module.h | 2 -
include/asm-x86/nmi.h | 4 -
include/asm-x86/page.h | 8 +-
include/asm-x86/page_32.h | 13 +-
include/asm-x86/paravirt.h | 20 +
include/asm-x86/pgtable.h | 16 +-
include/asm-x86/ptrace.h | 4 -
include/asm-x86/smp.h | 40 +-
include/asm-x86/spinlock.h | 9 +-
include/asm-x86/system.h | 5 +-
include/asm-x86/tlbflush.h | 10 +
include/asm-x86/traps.h | 73 +-
include/asm-x86/xen/hypervisor.h | 14 +-
include/linux/kernel.h | 2 +-
include/linux/mm.h | 13 +-
include/linux/mm_types.h | 10 +-
include/linux/mmdebug.h | 18 +
include/linux/sched.h | 6 +-
include/xen/events.h | 2 +
lib/Kconfig.debug | 9 +
lib/cmdline.c | 2 +-
mm/vmalloc.c | 7 +
98 files changed, 3425 insertions(+), 3522 deletions(-)
create mode 100644 arch/x86/kernel/dumpstack_32.c
create mode 100644 arch/x86/kernel/dumpstack_64.c
create mode 100644 arch/x86/kernel/paravirt-spinlocks.c
delete mode 100644 arch/x86/kernel/process_32.c
rename arch/x86/kernel/{traps_32.c => traps.c} (60%)
delete mode 100644 arch/x86/kernel/traps_64.c
rename arch/x86/mm/{discontig_32.c => numa_32.c} (100%)
create mode 100644 arch/x86/xen/debugfs.c
create mode 100644 arch/x86/xen/debugfs.h
create mode 100644 arch/x86/xen/irq.c
create mode 100644 arch/x86/xen/spinlock.c
create mode 100644 drivers/xen/cpu_hotplug.c
create mode 100644 include/linux/mmdebug.h
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index f8843c3..52763b7 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -38,8 +38,7 @@ config M386
- "Crusoe" for the Transmeta Crusoe series.
- "Efficeon" for the Transmeta Efficeon series.
- "Winchip-C6" for original IDT Winchip.
- - "Winchip-2" for IDT Winchip 2.
- - "Winchip-2A" for IDT Winchips with 3dNow! capabilities.
+ - "Winchip-2" for IDT Winchips with 3dNow! capabilities.
- "GeodeGX1" for Geode GX1 (Cyrix MediaGX).
- "Geode GX/LX" For AMD Geode GX and LX processors.
- "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3.
@@ -194,19 +193,11 @@ config MWINCHIPC6
treat this chip as a 586TSC with some extended instructions
and alignment requirements.
-config MWINCHIP2
- bool "Winchip-2"
- depends on X86_32
- help
- Select this for an IDT Winchip-2. Linux and GCC
- treat this chip as a 586TSC with some extended instructions
- and alignment requirements.
-
config MWINCHIP3D
- bool "Winchip-2A/Winchip-3"
+ bool "Winchip-2/Winchip-2A/Winchip-3"
depends on X86_32
help
- Select this for an IDT Winchip-2A or 3. Linux and GCC
+ Select this for an IDT Winchip-2, 2A or 3. Linux and GCC
treat this chip as a 586TSC with some extended instructions
and alignment requirements. Also enable out of order memory
stores for this CPU, which can increase performance of some
@@ -318,7 +309,7 @@ config X86_L1_CACHE_SHIFT
int
default "7" if MPENTIUM4 || X86_GENERIC || GENERIC_CPU || MPSC
default "4" if X86_ELAN || M486 || M386 || MGEODEGX1
- default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
+ default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MVIAC7
config X86_XADD
@@ -360,7 +351,7 @@ config X86_POPAD_OK
config X86_ALIGNMENT_16
def_bool y
- depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1
+ depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1
config X86_INTEL_USERCOPY
def_bool y
@@ -368,7 +359,7 @@ config X86_INTEL_USERCOPY
config X86_USE_PPRO_CHECKSUM
def_bool y
- depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX || MCORE2
+ depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX || MCORE2
config X86_USE_3DNOW
def_bool y
@@ -376,7 +367,7 @@ config X86_USE_3DNOW
config X86_OOSTORE
def_bool y
- depends on (MWINCHIP3D || MWINCHIP2 || MWINCHIPC6) && MTRR
+ depends on (MWINCHIP3D || MWINCHIPC6) && MTRR
#
# P6_NOPs are a relatively minor optimization that require a family >=
@@ -396,7 +387,7 @@ config X86_P6_NOP
config X86_TSC
def_bool y
- depends on ((MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ) || X86_64
+ depends on ((MWINCHIP3D || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ) || X86_64
config X86_CMPXCHG64
def_bool y
@@ -406,7 +397,7 @@ config X86_CMPXCHG64
# generates cmov.
config X86_CMOV
def_bool y
- depends on (MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || X86_64)
+ depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64)
config X86_MINIMUM_CPU_FAMILY
int
@@ -417,7 +408,7 @@ config X86_MINIMUM_CPU_FAMILY
config X86_DEBUGCTLMSR
def_bool y
- depends on !(MK6 || MWINCHIPC6 || MWINCHIP2 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486 || M386)
+ depends on !(MK6 || MWINCHIPC6 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486 || M386)
menuconfig PROCESSOR_SELECT
default y
diff --git a/arch/x86/Makefile_32.cpu b/arch/x86/Makefile_32.cpu
index e372b58..12bdd85 100644
--- a/arch/x86/Makefile_32.cpu
+++ b/arch/x86/Makefile_32.cpu
@@ -28,7 +28,6 @@ cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,-march=athlon)
cflags-$(CONFIG_MCRUSOE) += -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
cflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586)
-cflags-$(CONFIG_MWINCHIP2) += $(call cc-option,-march=winchip2,-march=i586)
cflags-$(CONFIG_MWINCHIP3D) += $(call cc-option,-march=winchip2,-march=i586)
cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686)
diff --git a/arch/x86/configs/i386_defconfig b/arch/x86/configs/i386_defconfig
index ef9a520..9269ef4 100644
--- a/arch/x86/configs/i386_defconfig
+++ b/arch/x86/configs/i386_defconfig
@@ -213,7 +213,6 @@ CONFIG_M686=y
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
-# CONFIG_MWINCHIP2 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
diff --git a/arch/x86/configs/x86_64_defconfig b/arch/x86/configs/x86_64_defconfig
index e620ea6..638bc85 100644
--- a/arch/x86/configs/x86_64_defconfig
+++ b/arch/x86/configs/x86_64_defconfig
@@ -210,7 +210,6 @@ CONFIG_X86_PC=y
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
-# CONFIG_MWINCHIP2 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S
index ffc1bb4..eb43147 100644
--- a/arch/x86/ia32/ia32entry.S
+++ b/arch/x86/ia32/ia32entry.S
@@ -39,11 +39,11 @@
.endm
/* clobbers %eax */
- .macro CLEAR_RREGS
+ .macro CLEAR_RREGS _r9=rax
xorl %eax,%eax
movq %rax,R11(%rsp)
movq %rax,R10(%rsp)
- movq %rax,R9(%rsp)
+ movq %\_r9,R9(%rsp)
movq %rax,R8(%rsp)
.endm
@@ -52,11 +52,10 @@
* We don't reload %eax because syscall_trace_enter() returned
* the value it wants us to use in the table lookup.
*/
- .macro LOAD_ARGS32 offset
- movl \offset(%rsp),%r11d
- movl \offset+8(%rsp),%r10d
+ .macro LOAD_ARGS32 offset, _r9=0
+ .if \_r9
movl \offset+16(%rsp),%r9d
- movl \offset+24(%rsp),%r8d
+ .endif
movl \offset+40(%rsp),%ecx
movl \offset+48(%rsp),%edx
movl \offset+56(%rsp),%esi
@@ -145,7 +144,7 @@ ENTRY(ia32_sysenter_target)
SAVE_ARGS 0,0,1
/* no need to do an access_ok check here because rbp has been
32bit zero extended */
-1: movl (%rbp),%r9d
+1: movl (%rbp),%ebp
.section __ex_table,"a"
.quad 1b,ia32_badarg
.previous
@@ -157,7 +156,7 @@ ENTRY(ia32_sysenter_target)
cmpl $(IA32_NR_syscalls-1),%eax
ja ia32_badsys
sysenter_do_call:
- IA32_ARG_FIXUP 1
+ IA32_ARG_FIXUP
sysenter_dispatch:
call *ia32_sys_call_table(,%rax,8)
movq %rax,RAX-ARGOFFSET(%rsp)
@@ -234,20 +233,17 @@ sysexit_audit:
#endif
sysenter_tracesys:
- xchgl %r9d,%ebp
#ifdef CONFIG_AUDITSYSCALL
testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags(%r10)
jz sysenter_auditsys
#endif
SAVE_REST
CLEAR_RREGS
- movq %r9,R9(%rsp)
movq $-ENOSYS,RAX(%rsp)/* ptrace can change this for a bad syscall */
movq %rsp,%rdi /* &pt_regs -> arg1 */
call syscall_trace_enter
LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
RESTORE_REST
- xchgl %ebp,%r9d
cmpl $(IA32_NR_syscalls-1),%eax
ja int_ret_from_sys_call /* sysenter_tracesys has set RAX(%rsp) */
jmp sysenter_do_call
@@ -314,9 +310,9 @@ ENTRY(ia32_cstar_target)
testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10)
CFI_REMEMBER_STATE
jnz cstar_tracesys
-cstar_do_call:
cmpl $IA32_NR_syscalls-1,%eax
ja ia32_badsys
+cstar_do_call:
IA32_ARG_FIXUP 1
cstar_dispatch:
call *ia32_sys_call_table(,%rax,8)
@@ -357,15 +353,13 @@ cstar_tracesys:
#endif
xchgl %r9d,%ebp
SAVE_REST
- CLEAR_RREGS
- movq %r9,R9(%rsp)
+ CLEAR_RREGS r9
movq $-ENOSYS,RAX(%rsp) /* ptrace can change this for a bad syscall */
movq %rsp,%rdi /* &pt_regs -> arg1 */
call syscall_trace_enter
- LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
+ LOAD_ARGS32 ARGOFFSET, 1 /* reload args from stack in case ptrace changed it */
RESTORE_REST
xchgl %ebp,%r9d
- movl RSP-ARGOFFSET(%rsp), %r8d
cmpl $(IA32_NR_syscalls-1),%eax
ja int_ret_from_sys_call /* cstar_tracesys has set RAX(%rsp) */
jmp cstar_do_call
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index c9be69f..f6160cc 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -10,7 +10,7 @@ ifdef CONFIG_FTRACE
# Do not profile debug and lowlevel utilities
CFLAGS_REMOVE_tsc.o = -pg
CFLAGS_REMOVE_rtc.o = -pg
-CFLAGS_REMOVE_paravirt.o = -pg
+CFLAGS_REMOVE_paravirt-spinlocks.o = -pg
endif
#
@@ -23,7 +23,7 @@ CFLAGS_hpet.o := $(nostackp)
CFLAGS_tsc.o := $(nostackp)
obj-y := process_$(BITS).o signal_$(BITS).o entry_$(BITS).o
-obj-y += traps_$(BITS).o irq_$(BITS).o
+obj-y += traps.o irq_$(BITS).o dumpstack_$(BITS).o
obj-y += time_$(BITS).o ioport.o ldt.o
obj-y += setup.o i8259.o irqinit_$(BITS).o setup_percpu.o
obj-$(CONFIG_X86_VISWS) += visws_quirks.o
@@ -90,7 +90,7 @@ obj-$(CONFIG_DEBUG_NX_TEST) += test_nx.o
obj-$(CONFIG_VMI) += vmi_32.o vmiclock_32.o
obj-$(CONFIG_KVM_GUEST) += kvm.o
obj-$(CONFIG_KVM_CLOCK) += kvmclock.o
-obj-$(CONFIG_PARAVIRT) += paravirt.o paravirt_patch_$(BITS).o
+obj-$(CONFIG_PARAVIRT) += paravirt.o paravirt_patch_$(BITS).o paravirt-spinlocks.o
obj-$(CONFIG_PARAVIRT_CLOCK) += pvclock.o
obj-$(CONFIG_PCSPKR_PLATFORM) += pcspeaker.o
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index c2ac1b4..0f5b567 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -121,35 +121,19 @@ enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
*/
char *__init __acpi_map_table(unsigned long phys, unsigned long size)
{
- unsigned long base, offset, mapped_size;
- int idx;
+ static char *prev_map;
+ static unsigned long prev_size;
if (!phys || !size)
return NULL;
- if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT))
- return __va(phys);
+ if (prev_map)
+ early_iounmap(prev_map, prev_size);
- offset = phys & (PAGE_SIZE - 1);
- mapped_size = PAGE_SIZE - offset;
- clear_fixmap(FIX_ACPI_END);
- set_fixmap(FIX_ACPI_END, phys);
- base = fix_to_virt(FIX_ACPI_END);
+ prev_size = size;
+ prev_map = early_ioremap(phys, size);
- /*
- * Most cases can be covered by the below.
- */
- idx = FIX_ACPI_END;
- while (mapped_size < size) {
- if (--idx < FIX_ACPI_BEGIN)
- return NULL; /* cannot handle this */
- phys += PAGE_SIZE;
- clear_fixmap(idx);
- set_fixmap(idx, phys);
- mapped_size += PAGE_SIZE;
- }
-
- return ((unsigned char *)base + offset);
+ return prev_map;
}
#ifdef CONFIG_PCI_MMCONFIG
@@ -1418,8 +1402,16 @@ static int __init force_acpi_ht(const struct dmi_system_id *d)
*/
static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
{
- pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", d->ident);
- acpi_skip_timer_override = 1;
+ /*
+ * The ati_ixp4x0_rev() early PCI quirk should have set
+ * the acpi_skip_timer_override flag already:
+ */
+ if (!acpi_skip_timer_override) {
+ WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
+ pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
+ d->ident);
+ acpi_skip_timer_override = 1;
+ }
return 0;
}
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index fb04e49..a84ac7b 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -444,7 +444,7 @@ void __init alternative_instructions(void)
_text, _etext);
/* Only switch to UP mode if we don't immediately boot others */
- if (num_possible_cpus() == 1 || setup_max_cpus <= 1)
+ if (num_present_cpus() == 1 || setup_max_cpus <= 1)
alternatives_smp_switch(0);
}
#endif
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 7581b62..c0b279f 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -124,18 +124,25 @@ static inline int flag_is_changeable_p(u32 flag)
{
u32 f1, f2;
- asm("pushfl\n\t"
- "pushfl\n\t"
- "popl %0\n\t"
- "movl %0,%1\n\t"
- "xorl %2,%0\n\t"
- "pushl %0\n\t"
- "popfl\n\t"
- "pushfl\n\t"
- "popl %0\n\t"
- "popfl\n\t"
- : "=&r" (f1), "=&r" (f2)
- : "ir" (flag));
+ /*
+ * Cyrix and IDT cpus allow disabling of CPUID
+ * so the code below may return different results
+ * when it is executed before and after enabling
+ * the CPUID. Add "volatile" to not allow gcc to
+ * optimize the subsequent calls to this function.
+ */
+ asm volatile ("pushfl\n\t"
+ "pushfl\n\t"
+ "popl %0\n\t"
+ "movl %0,%1\n\t"
+ "xorl %2,%0\n\t"
+ "pushl %0\n\t"
+ "popfl\n\t"
+ "pushfl\n\t"
+ "popl %0\n\t"
+ "popfl\n\t"
+ : "=&r" (f1), "=&r" (f2)
+ : "ir" (flag));
return ((f1^f2) & flag) != 0;
}
@@ -574,6 +581,10 @@ void __init early_cpu_init(void)
* The NOPL instruction is supposed to exist on all CPUs with
* family >= 6; unfortunately, that's not true in practice because
* of early VIA chips and (more importantly) broken virtualizers that
+ *
+ * Note: no 64-bit chip is known to lack these, but put the code here
+ * for consistency with 32 bits, and to make it utterly trivial to
+ * diagnose the problem should it ever surface.
* are not easy to detect. In the latter case it doesn't even *fail*
* reliably, so probing for it doesn't even work. Disable it completely
* unless we can find a reliable way to detect all the broken cases.
@@ -797,7 +808,7 @@ void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
else if (c->cpuid_level >= 0)
vendor = c->x86_vendor_id;
- if (vendor && strncmp(c->x86_model_id, vendor, strlen(vendor)))
+ if (vendor && !strstr(c->x86_model_id, vendor))
printk(KERN_CONT "%s ", vendor);
if (c->x86_model_id[0])
@@ -1121,16 +1132,5 @@ void __cpuinit cpu_init(void)
xsave_init();
}
-#ifdef CONFIG_HOTPLUG_CPU
-void __cpuinit cpu_uninit(void)
-{
- int cpu = raw_smp_processor_id();
- cpu_clear(cpu, cpu_initialized);
-
- /* lazy TLB state */
- per_cpu(cpu_tlbstate, cpu).state = 0;
- per_cpu(cpu_tlbstate, cpu).active_mm = &init_mm;
-}
-#endif
#endif
diff --git a/arch/x86/kernel/doublefault_32.c b/arch/x86/kernel/doublefault_32.c
index a47798b..b4f14c6 100644
--- a/arch/x86/kernel/doublefault_32.c
+++ b/arch/x86/kernel/doublefault_32.c
@@ -66,6 +66,6 @@ struct tss_struct doublefault_tss __cacheline_aligned = {
.ds = __USER_DS,
.fs = __KERNEL_PERCPU,
- .__cr3 = __pa(swapper_pg_dir)
+ .__cr3 = __pa_nodebug(swapper_pg_dir),
}
};
diff --git a/arch/x86/kernel/dumpstack_32.c b/arch/x86/kernel/dumpstack_32.c
new file mode 100644
index 0000000..c398b27
--- /dev/null
+++ b/arch/x86/kernel/dumpstack_32.c
@@ -0,0 +1,422 @@
+/*
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
+ */
+#include <linux/kallsyms.h>
+#include <linux/kprobes.h>
+#include <linux/uaccess.h>
+#include <linux/utsname.h>
+#include <linux/hardirq.h>
+#include <linux/kdebug.h>
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/kexec.h>
+#include <linux/bug.h>
+#include <linux/nmi.h>
+
+#include <asm/stacktrace.h>
+
+int panic_on_unrecovered_nmi;
+int kstack_depth_to_print = 24;
+static unsigned int code_bytes = 64;
+static int die_counter;
+
+void printk_address(unsigned long address, int reliable)
+{
+#ifdef CONFIG_KALLSYMS
+ unsigned long offset = 0;
+ unsigned long symsize;
+ const char *symname;
+ char *modname;
+ char *delim = ":";
+ char namebuf[KSYM_NAME_LEN];
+ char reliab[4] = "";
+
+ symname = kallsyms_lookup(address, &symsize, &offset,
+ &modname, namebuf);
+ if (!symname) {
+ printk(" [<%08lx>]\n", address);
+ return;
+ }
+ if (!reliable)
+ strcpy(reliab, "? ");
+
+ if (!modname)
+ modname = delim = "";
+ printk(" [<%08lx>] %s%s%s%s%s+0x%lx/0x%lx\n",
+ address, reliab, delim, modname, delim, symname, offset, symsize);
+#else
+ printk(" [<%08lx>]\n", address);
+#endif
+}
+
+static inline int valid_stack_ptr(struct thread_info *tinfo,
+ void *p, unsigned int size)
+{
+ void *t = tinfo;
+ return p > t && p <= t + THREAD_SIZE - size;
+}
+
+/* The form of the top of the frame on the stack */
+struct stack_frame {
+ struct stack_frame *next_frame;
+ unsigned long return_address;
+};
+
+static inline unsigned long
+print_context_stack(struct thread_info *tinfo,
+ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data)
+{
+ struct stack_frame *frame = (struct stack_frame *)bp;
+
+ while (valid_stack_ptr(tinfo, stack, sizeof(*stack))) {
+ unsigned long addr;
+
+ addr = *stack;
+ if (__kernel_text_address(addr)) {
+ if ((unsigned long) stack == bp + 4) {
+ ops->address(data, addr, 1);
+ frame = frame->next_frame;
+ bp = (unsigned long) frame;
+ } else {
+ ops->address(data, addr, bp == 0);
+ }
+ }
+ stack++;
+ }
+ return bp;
+}
+
+void dump_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data)
+{
+ if (!task)
+ task = current;
+
+ if (!stack) {
+ unsigned long dummy;
+ stack = &dummy;
+ if (task != current)
+ stack = (unsigned long *)task->thread.sp;
+ }
+
+#ifdef CONFIG_FRAME_POINTER
+ if (!bp) {
+ if (task == current) {
+ /* Grab bp right from our regs */
+ asm("movl %%ebp, %0" : "=r" (bp) :);
+ } else {
+ /* bp is the last reg pushed by switch_to */
+ bp = *(unsigned long *) task->thread.sp;
+ }
+ }
+#endif
+
+ for (;;) {
+ struct thread_info *context;
+
+ context = (struct thread_info *)
+ ((unsigned long)stack & (~(THREAD_SIZE - 1)));
+ bp = print_context_stack(context, stack, bp, ops, data);
+ /*
+ * Should be after the line below, but somewhere
+ * in early boot context comes out corrupted and we
+ * can't reference it:
+ */
+ if (ops->stack(data, "IRQ") < 0)
+ break;
+ stack = (unsigned long *)context->previous_esp;
+ if (!stack)
+ break;
+ touch_nmi_watchdog();
+ }
+}
+EXPORT_SYMBOL(dump_trace);
+
+static void
+print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
+{
+ printk(data);
+ print_symbol(msg, symbol);
+ printk("\n");
+}
+
+static void print_trace_warning(void *data, char *msg)
+{
+ printk("%s%s\n", (char *)data, msg);
+}
+
+static int print_trace_stack(void *data, char *name)
+{
+ return 0;
+}
+
+/*
+ * Print one address/symbol entries per line.
+ */
+static void print_trace_address(void *data, unsigned long addr, int reliable)
+{
+ printk("%s [<%08lx>] ", (char *)data, addr);
+ if (!reliable)
+ printk("? ");
+ print_symbol("%s\n", addr);
+ touch_nmi_watchdog();
+}
+
+static const struct stacktrace_ops print_trace_ops = {
+ .warning = print_trace_warning,
+ .warning_symbol = print_trace_warning_symbol,
+ .stack = print_trace_stack,
+ .address = print_trace_address,
+};
+
+static void
+show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp, char *log_lvl)
+{
+ dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
+ printk("%s =======================\n", log_lvl);
+}
+
+void show_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp)
+{
+ show_trace_log_lvl(task, regs, stack, bp, "");
+}
+
+static void
+show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *sp, unsigned long bp, char *log_lvl)
+{
+ unsigned long *stack;
+ int i;
+
+ if (sp == NULL) {
+ if (task)
+ sp = (unsigned long *)task->thread.sp;
+ else
+ sp = (unsigned long *)&sp;
+ }
+
+ stack = sp;
+ for (i = 0; i < kstack_depth_to_print; i++) {
+ if (kstack_end(stack))
+ break;
+ if (i && ((i % 8) == 0))
+ printk("\n%s ", log_lvl);
+ printk("%08lx ", *stack++);
+ }
+ printk("\n%sCall Trace:\n", log_lvl);
+
+ show_trace_log_lvl(task, regs, sp, bp, log_lvl);
+}
+
+void show_stack(struct task_struct *task, unsigned long *sp)
+{
+ printk(" ");
+ show_stack_log_lvl(task, NULL, sp, 0, "");
+}
+
+/*
+ * The architecture-independent dump_stack generator
+ */
+void dump_stack(void)
+{
+ unsigned long bp = 0;
+ unsigned long stack;
+
+#ifdef CONFIG_FRAME_POINTER
+ if (!bp)
+ asm("movl %%ebp, %0" : "=r" (bp):);
+#endif
+
+ printk("Pid: %d, comm: %.20s %s %s %.*s\n",
+ current->pid, current->comm, print_tainted(),
+ init_utsname()->release,
+ (int)strcspn(init_utsname()->version, " "),
+ init_utsname()->version);
+
+ show_trace(current, NULL, &stack, bp);
+}
+
+EXPORT_SYMBOL(dump_stack);
+
+void show_registers(struct pt_regs *regs)
+{
+ int i;
+
+ print_modules();
+ __show_regs(regs, 0);
+
+ printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
+ TASK_COMM_LEN, current->comm, task_pid_nr(current),
+ current_thread_info(), current, task_thread_info(current));
+ /*
+ * When in-kernel, we also print out the stack and code at the
+ * time of the fault..
+ */
+ if (!user_mode_vm(regs)) {
+ unsigned int code_prologue = code_bytes * 43 / 64;
+ unsigned int code_len = code_bytes;
+ unsigned char c;
+ u8 *ip;
+
+ printk("\n" KERN_EMERG "Stack: ");
+ show_stack_log_lvl(NULL, regs, ®s->sp, 0, KERN_EMERG);
+
+ printk(KERN_EMERG "Code: ");
+
+ ip = (u8 *)regs->ip - code_prologue;
+ if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
+ /* try starting at EIP */
+ ip = (u8 *)regs->ip;
+ code_len = code_len - code_prologue + 1;
+ }
+ for (i = 0; i < code_len; i++, ip++) {
+ if (ip < (u8 *)PAGE_OFFSET ||
+ probe_kernel_address(ip, c)) {
+ printk(" Bad EIP value.");
+ break;
+ }
+ if (ip == (u8 *)regs->ip)
+ printk("<%02x> ", c);
+ else
+ printk("%02x ", c);
+ }
+ }
+ printk("\n");
+}
+
+int is_valid_bugaddr(unsigned long ip)
+{
+ unsigned short ud2;
+
+ if (ip < PAGE_OFFSET)
+ return 0;
+ if (probe_kernel_address((unsigned short *)ip, ud2))
+ return 0;
+
+ return ud2 == 0x0b0f;
+}
+
+static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
+static int die_owner = -1;
+static unsigned int die_nest_count;
+
+unsigned __kprobes long oops_begin(void)
+{
+ unsigned long flags;
+
+ oops_enter();
+
+ if (die_owner != raw_smp_processor_id()) {
+ console_verbose();
+ raw_local_irq_save(flags);
+ __raw_spin_lock(&die_lock);
+ die_owner = smp_processor_id();
+ die_nest_count = 0;
+ bust_spinlocks(1);
+ } else {
+ raw_local_irq_save(flags);
+ }
+ die_nest_count++;
+ return flags;
+}
+
+void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
+{
+ bust_spinlocks(0);
+ die_owner = -1;
+ add_taint(TAINT_DIE);
+ __raw_spin_unlock(&die_lock);
+ raw_local_irq_restore(flags);
+
+ if (!regs)
+ return;
+
+ if (kexec_should_crash(current))
+ crash_kexec(regs);
+
+ if (in_interrupt())
+ panic("Fatal exception in interrupt");
+
+ if (panic_on_oops)
+ panic("Fatal exception");
+
+ oops_exit();
+ do_exit(signr);
+}
+
+int __kprobes __die(const char *str, struct pt_regs *regs, long err)
+{
+ unsigned short ss;
+ unsigned long sp;
+
+ printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter);
+#ifdef CONFIG_PREEMPT
+ printk("PREEMPT ");
+#endif
+#ifdef CONFIG_SMP
+ printk("SMP ");
+#endif
+#ifdef CONFIG_DEBUG_PAGEALLOC
+ printk("DEBUG_PAGEALLOC");
+#endif
+ printk("\n");
+ if (notify_die(DIE_OOPS, str, regs, err,
+ current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
+ return 1;
+
+ show_registers(regs);
+ /* Executive summary in case the oops scrolled away */
+ sp = (unsigned long) (®s->sp);
+ savesegment(ss, ss);
+ if (user_mode(regs)) {
+ sp = regs->sp;
+ ss = regs->ss & 0xffff;
+ }
+ printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip);
+ print_symbol("%s", regs->ip);
+ printk(" SS:ESP %04x:%08lx\n", ss, sp);
+ return 0;
+}
+
+/*
+ * This is gone through when something in the kernel has done something bad
+ * and is about to be terminated:
+ */
+void die(const char *str, struct pt_regs *regs, long err)
+{
+ unsigned long flags = oops_begin();
+
+ if (die_nest_count < 3) {
+ report_bug(regs->ip, regs);
+
+ if (__die(str, regs, err))
+ regs = NULL;
+ } else {
+ printk(KERN_EMERG "Recursive die() failure, output suppressed\n");
+ }
+
+ oops_end(flags, regs, SIGSEGV);
+}
+
+static int __init kstack_setup(char *s)
+{
+ kstack_depth_to_print = simple_strtoul(s, NULL, 0);
+
+ return 1;
+}
+__setup("kstack=", kstack_setup);
+
+static int __init code_bytes_setup(char *s)
+{
+ code_bytes = simple_strtoul(s, NULL, 0);
+ if (code_bytes > 8192)
+ code_bytes = 8192;
+
+ return 1;
+}
+__setup("code_bytes=", code_bytes_setup);
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
new file mode 100644
index 0000000..6f15050
--- /dev/null
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -0,0 +1,565 @@
+/*
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
+ */
+#include <linux/kallsyms.h>
+#include <linux/kprobes.h>
+#include <linux/uaccess.h>
+#include <linux/utsname.h>
+#include <linux/hardirq.h>
+#include <linux/kdebug.h>
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/kexec.h>
+#include <linux/bug.h>
+#include <linux/nmi.h>
+
+#include <asm/stacktrace.h>
+
+int panic_on_unrecovered_nmi;
+int kstack_depth_to_print = 12;
+static unsigned int code_bytes = 64;
+static int die_counter;
+
+void printk_address(unsigned long address, int reliable)
+{
+ printk(" [<%016lx>] %s%pS\n",
+ address, reliable ? "" : "? ", (void *) address);
+}
+
+static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
+ unsigned *usedp, char **idp)
+{
+ static char ids[][8] = {
+ [DEBUG_STACK - 1] = "#DB",
+ [NMI_STACK - 1] = "NMI",
+ [DOUBLEFAULT_STACK - 1] = "#DF",
+ [STACKFAULT_STACK - 1] = "#SS",
+ [MCE_STACK - 1] = "#MC",
+#if DEBUG_STKSZ > EXCEPTION_STKSZ
+ [N_EXCEPTION_STACKS ...
+ N_EXCEPTION_STACKS + DEBUG_STKSZ / EXCEPTION_STKSZ - 2] = "#DB[?]"
+#endif
+ };
+ unsigned k;
+
+ /*
+ * Iterate over all exception stacks, and figure out whether
+ * 'stack' is in one of them:
+ */
+ for (k = 0; k < N_EXCEPTION_STACKS; k++) {
+ unsigned long end = per_cpu(orig_ist, cpu).ist[k];
+ /*
+ * Is 'stack' above this exception frame's end?
+ * If yes then skip to the next frame.
+ */
+ if (stack >= end)
+ continue;
+ /*
+ * Is 'stack' above this exception frame's start address?
+ * If yes then we found the right frame.
+ */
+ if (stack >= end - EXCEPTION_STKSZ) {
+ /*
+ * Make sure we only iterate through an exception
+ * stack once. If it comes up for the second time
+ * then there's something wrong going on - just
+ * break out and return NULL:
+ */
+ if (*usedp & (1U << k))
+ break;
+ *usedp |= 1U << k;
+ *idp = ids[k];
+ return (unsigned long *)end;
+ }
+ /*
+ * If this is a debug stack, and if it has a larger size than
+ * the usual exception stacks, then 'stack' might still
+ * be within the lower portion of the debug stack:
+ */
+#if DEBUG_STKSZ > EXCEPTION_STKSZ
+ if (k == DEBUG_STACK - 1 && stack >= end - DEBUG_STKSZ) {
+ unsigned j = N_EXCEPTION_STACKS - 1;
+
+ /*
+ * Black magic. A large debug stack is composed of
+ * multiple exception stack entries, which we
+ * iterate through now. Dont look:
+ */
+ do {
+ ++j;
+ end -= EXCEPTION_STKSZ;
+ ids[j][4] = '1' + (j - N_EXCEPTION_STACKS);
+ } while (stack < end - EXCEPTION_STKSZ);
+ if (*usedp & (1U << j))
+ break;
+ *usedp |= 1U << j;
+ *idp = ids[j];
+ return (unsigned long *)end;
+ }
+#endif
+ }
+ return NULL;
+}
+
+/*
+ * x86-64 can have up to three kernel stacks:
+ * process stack
+ * interrupt stack
+ * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
+ */
+
+static inline int valid_stack_ptr(struct thread_info *tinfo,
+ void *p, unsigned int size, void *end)
+{
+ void *t = tinfo;
+ if (end) {
+ if (p < end && p >= (end-THREAD_SIZE))
+ return 1;
+ else
+ return 0;
+ }
+ return p > t && p < t + THREAD_SIZE - size;
+}
+
+/* The form of the top of the frame on the stack */
+struct stack_frame {
+ struct stack_frame *next_frame;
+ unsigned long return_address;
+};
+
+static inline unsigned long
+print_context_stack(struct thread_info *tinfo,
+ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data,
+ unsigned long *end)
+{
+ struct stack_frame *frame = (struct stack_frame *)bp;
+
+ while (valid_stack_ptr(tinfo, stack, sizeof(*stack), end)) {
+ unsigned long addr;
+
+ addr = *stack;
+ if (__kernel_text_address(addr)) {
+ if ((unsigned long) stack == bp + 8) {
+ ops->address(data, addr, 1);
+ frame = frame->next_frame;
+ bp = (unsigned long) frame;
+ } else {
+ ops->address(data, addr, bp == 0);
+ }
+ }
+ stack++;
+ }
+ return bp;
+}
+
+void dump_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data)
+{
+ const unsigned cpu = get_cpu();
+ unsigned long *irqstack_end = (unsigned long *)cpu_pda(cpu)->irqstackptr;
+ unsigned used = 0;
+ struct thread_info *tinfo;
+
+ if (!task)
+ task = current;
+
+ if (!stack) {
+ unsigned long dummy;
+ stack = &dummy;
+ if (task && task != current)
+ stack = (unsigned long *)task->thread.sp;
+ }
+
+#ifdef CONFIG_FRAME_POINTER
+ if (!bp) {
+ if (task == current) {
+ /* Grab bp right from our regs */
+ asm("movq %%rbp, %0" : "=r" (bp) : );
+ } else {
+ /* bp is the last reg pushed by switch_to */
+ bp = *(unsigned long *) task->thread.sp;
+ }
+ }
+#endif
+
+ /*
+ * Print function call entries in all stacks, starting at the
+ * current stack address. If the stacks consist of nested
+ * exceptions
+ */
+ tinfo = task_thread_info(task);
+ for (;;) {
+ char *id;
+ unsigned long *estack_end;
+ estack_end = in_exception_stack(cpu, (unsigned long)stack,
+ &used, &id);
+
+ if (estack_end) {
+ if (ops->stack(data, id) < 0)
+ break;
+
+ bp = print_context_stack(tinfo, stack, bp, ops,
+ data, estack_end);
+ ops->stack(data, "<EOE>");
+ /*
+ * We link to the next stack via the
+ * second-to-last pointer (index -2 to end) in the
+ * exception stack:
+ */
+ stack = (unsigned long *) estack_end[-2];
+ continue;
+ }
+ if (irqstack_end) {
+ unsigned long *irqstack;
+ irqstack = irqstack_end -
+ (IRQSTACKSIZE - 64) / sizeof(*irqstack);
+
+ if (stack >= irqstack && stack < irqstack_end) {
+ if (ops->stack(data, "IRQ") < 0)
+ break;
+ bp = print_context_stack(tinfo, stack, bp,
+ ops, data, irqstack_end);
+ /*
+ * We link to the next stack (which would be
+ * the process stack normally) the last
+ * pointer (index -1 to end) in the IRQ stack:
+ */
+ stack = (unsigned long *) (irqstack_end[-1]);
+ irqstack_end = NULL;
+ ops->stack(data, "EOI");
+ continue;
+ }
+ }
+ break;
+ }
+
+ /*
+ * This handles the process stack:
+ */
+ bp = print_context_stack(tinfo, stack, bp, ops, data, NULL);
+ put_cpu();
+}
+EXPORT_SYMBOL(dump_trace);
+
+static void
+print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
+{
+ print_symbol(msg, symbol);
+ printk("\n");
+}
+
+static void print_trace_warning(void *data, char *msg)
+{
+ printk("%s\n", msg);
+}
+
+static int print_trace_stack(void *data, char *name)
+{
+ printk(" <%s> ", name);
+ return 0;
+}
+
+static void print_trace_address(void *data, unsigned long addr, int reliable)
+{
+ touch_nmi_watchdog();
+ printk_address(addr, reliable);
+}
+
+static const struct stacktrace_ops print_trace_ops = {
+ .warning = print_trace_warning,
+ .warning_symbol = print_trace_warning_symbol,
+ .stack = print_trace_stack,
+ .address = print_trace_address,
+};
+
+static void
+show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp, char *log_lvl)
+{
+ printk("Call Trace:\n");
+ dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
+}
+
+void show_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp)
+{
+ show_trace_log_lvl(task, regs, stack, bp, "");
+}
+
+static void
+show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *sp, unsigned long bp, char *log_lvl)
+{
+ unsigned long *stack;
+ int i;
+ const int cpu = smp_processor_id();
+ unsigned long *irqstack_end =
+ (unsigned long *) (cpu_pda(cpu)->irqstackptr);
+ unsigned long *irqstack =
+ (unsigned long *) (cpu_pda(cpu)->irqstackptr - IRQSTACKSIZE);
+
+ /*
+ * debugging aid: "show_stack(NULL, NULL);" prints the
+ * back trace for this cpu.
+ */
+
+ if (sp == NULL) {
+ if (task)
+ sp = (unsigned long *)task->thread.sp;
+ else
+ sp = (unsigned long *)&sp;
+ }
+
+ stack = sp;
+ for (i = 0; i < kstack_depth_to_print; i++) {
+ if (stack >= irqstack && stack <= irqstack_end) {
+ if (stack == irqstack_end) {
+ stack = (unsigned long *) (irqstack_end[-1]);
+ printk(" <EOI> ");
+ }
+ } else {
+ if (((long) stack & (THREAD_SIZE-1)) == 0)
+ break;
+ }
+ if (i && ((i % 4) == 0))
+ printk("\n");
+ printk(" %016lx", *stack++);
+ touch_nmi_watchdog();
+ }
+ printk("\n");
+ show_trace_log_lvl(task, regs, sp, bp, log_lvl);
+}
+
+void show_stack(struct task_struct *task, unsigned long *sp)
+{
+ show_stack_log_lvl(task, NULL, sp, 0, "");
+}
+
+/*
+ * The architecture-independent dump_stack generator
+ */
+void dump_stack(void)
+{
+ unsigned long bp = 0;
+ unsigned long stack;
+
+#ifdef CONFIG_FRAME_POINTER
+ if (!bp)
+ asm("movq %%rbp, %0" : "=r" (bp) : );
+#endif
+
+ printk("Pid: %d, comm: %.20s %s %s %.*s\n",
+ current->pid, current->comm, print_tainted(),
+ init_utsname()->release,
+ (int)strcspn(init_utsname()->version, " "),
+ init_utsname()->version);
+ show_trace(NULL, NULL, &stack, bp);
+}
+EXPORT_SYMBOL(dump_stack);
+
+void show_registers(struct pt_regs *regs)
+{
+ int i;
+ unsigned long sp;
+ const int cpu = smp_processor_id();
+ struct task_struct *cur = cpu_pda(cpu)->pcurrent;
+
+ sp = regs->sp;
+ printk("CPU %d ", cpu);
+ __show_regs(regs, 1);
+ printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
+ cur->comm, cur->pid, task_thread_info(cur), cur);
+
+ /*
+ * When in-kernel, we also print out the stack and code at the
+ * time of the fault..
+ */
+ if (!user_mode(regs)) {
+ unsigned int code_prologue = code_bytes * 43 / 64;
+ unsigned int code_len = code_bytes;
+ unsigned char c;
+ u8 *ip;
+
+ printk("Stack: ");
+ show_stack_log_lvl(NULL, regs, (unsigned long *)sp,
+ regs->bp, "");
+
+ printk(KERN_EMERG "Code: ");
+
+ ip = (u8 *)regs->ip - code_prologue;
+ if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
+ /* try starting at RIP */
+ ip = (u8 *)regs->ip;
+ code_len = code_len - code_prologue + 1;
+ }
+ for (i = 0; i < code_len; i++, ip++) {
+ if (ip < (u8 *)PAGE_OFFSET ||
+ probe_kernel_address(ip, c)) {
+ printk(" Bad RIP value.");
+ break;
+ }
+ if (ip == (u8 *)regs->ip)
+ printk("<%02x> ", c);
+ else
+ printk("%02x ", c);
+ }
+ }
+ printk("\n");
+}
+
+int is_valid_bugaddr(unsigned long ip)
+{
+ unsigned short ud2;
+
+ if (__copy_from_user(&ud2, (const void __user *) ip, sizeof(ud2)))
+ return 0;
+
+ return ud2 == 0x0b0f;
+}
+
+static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
+static int die_owner = -1;
+static unsigned int die_nest_count;
+
+unsigned __kprobes long oops_begin(void)
+{
+ int cpu;
+ unsigned long flags;
+
+ oops_enter();
+
+ /* racy, but better than risking deadlock. */
+ raw_local_irq_save(flags);
+ cpu = smp_processor_id();
+ if (!__raw_spin_trylock(&die_lock)) {
+ if (cpu == die_owner)
+ /* nested oops. should stop eventually */;
+ else
+ __raw_spin_lock(&die_lock);
+ }
+ die_nest_count++;
+ die_owner = cpu;
+ console_verbose();
+ bust_spinlocks(1);
+ return flags;
+}
+
+void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
+{
+ die_owner = -1;
+ bust_spinlocks(0);
+ die_nest_count--;
+ if (!die_nest_count)
+ /* Nest count reaches zero, release the lock. */
+ __raw_spin_unlock(&die_lock);
+ raw_local_irq_restore(flags);
+ if (!regs) {
+ oops_exit();
+ return;
+ }
+ if (in_interrupt())
+ panic("Fatal exception in interrupt");
+ if (panic_on_oops)
+ panic("Fatal exception");
+ oops_exit();
+ do_exit(signr);
+}
+
+int __kprobes __die(const char *str, struct pt_regs *regs, long err)
+{
+ printk(KERN_EMERG "%s: %04lx [%u] ", str, err & 0xffff, ++die_counter);
+#ifdef CONFIG_PREEMPT
+ printk("PREEMPT ");
+#endif
+#ifdef CONFIG_SMP
+ printk("SMP ");
+#endif
+#ifdef CONFIG_DEBUG_PAGEALLOC
+ printk("DEBUG_PAGEALLOC");
+#endif
+ printk("\n");
+ if (notify_die(DIE_OOPS, str, regs, err,
+ current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
+ return 1;
+
+ show_registers(regs);
+ add_taint(TAINT_DIE);
+ /* Executive summary in case the oops scrolled away */
+ printk(KERN_ALERT "RIP ");
+ printk_address(regs->ip, 1);
+ printk(" RSP <%016lx>\n", regs->sp);
+ if (kexec_should_crash(current))
+ crash_kexec(regs);
+ return 0;
+}
+
+void die(const char *str, struct pt_regs *regs, long err)
+{
+ unsigned long flags = oops_begin();
+
+ if (!user_mode(regs))
+ report_bug(regs->ip, regs);
+
+ if (__die(str, regs, err))
+ regs = NULL;
+ oops_end(flags, regs, SIGSEGV);
+}
+
+notrace __kprobes void
+die_nmi(char *str, struct pt_regs *regs, int do_panic)
+{
+ unsigned long flags;
+
+ if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
+ return;
+
+ flags = oops_begin();
+ /*
+ * We are in trouble anyway, lets at least try
+ * to get a message out.
+ */
+ printk(KERN_EMERG "%s", str);
+ printk(" on CPU%d, ip %08lx, registers:\n",
+ smp_processor_id(), regs->ip);
+ show_registers(regs);
+ if (kexec_should_crash(current))
+ crash_kexec(regs);
+ if (do_panic || panic_on_oops)
+ panic("Non maskable interrupt");
+ oops_end(flags, NULL, SIGBUS);
+ nmi_exit();
+ local_irq_enable();
+ do_exit(SIGBUS);
+}
+
+static int __init oops_setup(char *s)
+{
+ if (!s)
+ return -EINVAL;
+ if (!strcmp(s, "panic"))
+ panic_on_oops = 1;
+ return 0;
+}
+early_param("oops", oops_setup);
+
+static int __init kstack_setup(char *s)
+{
+ if (!s)
+ return -EINVAL;
+ kstack_depth_to_print = simple_strtoul(s, NULL, 0);
+ return 0;
+}
+early_param("kstack", kstack_setup);
+
+static int __init code_bytes_setup(char *s)
+{
+ code_bytes = simple_strtoul(s, NULL, 0);
+ if (code_bytes > 8192)
+ code_bytes = 8192;
+
+ return 1;
+}
+__setup("code_bytes=", code_bytes_setup);
diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index 24bb5fa..733c4f8 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -95,6 +95,52 @@ static void __init nvidia_bugs(int num, int slot, int func)
}
+static u32 ati_ixp4x0_rev(int num, int slot, int func)
+{
+ u32 d;
+ u8 b;
+
+ b = read_pci_config_byte(num, slot, func, 0xac);
+ b &= ~(1<<5);
+ write_pci_config_byte(num, slot, func, 0xac, b);
+
+ d = read_pci_config(num, slot, func, 0x70);
+ d |= 1<<8;
+ write_pci_config(num, slot, func, 0x70, d);
+
+ d = read_pci_config(num, slot, func, 0x8);
+ d &= 0xff;
+ return d;
+}
+
+static void __init ati_bugs(int num, int slot, int func)
+{
+#if defined(CONFIG_ACPI) && defined (CONFIG_X86_IO_APIC)
+ u32 d;
+ u8 b;
+
+ if (acpi_use_timer_override)
+ return;
+
+ d = ati_ixp4x0_rev(num, slot, func);
+ if (d < 0x82)
+ acpi_skip_timer_override = 1;
+ else {
+ /* check for IRQ0 interrupt swap */
+ outb(0x72, 0xcd6); b = inb(0xcd7);
+ if (!(b & 0x2))
+ acpi_skip_timer_override = 1;
+ }
+
+ if (acpi_skip_timer_override) {
+ printk(KERN_INFO "SB4X0 revision 0x%x\n", d);
+ printk(KERN_INFO "Ignoring ACPI timer override.\n");
+ printk(KERN_INFO "If you got timer trouble "
+ "try acpi_use_timer_override\n");
+ }
+#endif
+}
+
#ifdef CONFIG_DMAR
static void __init intel_g33_dmar(int num, int slot, int func)
{
@@ -128,6 +174,8 @@ static struct chipset early_qrk[] __initdata = {
PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, QFLAG_APPLY_ONCE, via_bugs },
{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB,
PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, fix_hypertransport_config },
+ { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS,
+ PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs },
#ifdef CONFIG_DMAR
{ PCI_VENDOR_ID_INTEL, 0x29c0,
PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, intel_g33_dmar },
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 109792b..b21fbfa 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -730,6 +730,7 @@ error_code:
movl $(__USER_DS), %ecx
movl %ecx, %ds
movl %ecx, %es
+ TRACE_IRQS_OFF
movl %esp,%eax # pt_regs pointer
call *%edi
jmp ret_from_exception
@@ -760,20 +761,9 @@ ENTRY(device_not_available)
RING0_INT_FRAME
pushl $-1 # mark this as an int
CFI_ADJUST_CFA_OFFSET 4
- SAVE_ALL
- GET_CR0_INTO_EAX
- testl $0x4, %eax # EM (math emulation bit)
- jne device_not_available_emulate
- preempt_stop(CLBR_ANY)
- call math_state_restore
- jmp ret_from_exception
-device_not_available_emulate:
- pushl $0 # temporary storage for ORIG_EIP
+ pushl $do_device_not_available
CFI_ADJUST_CFA_OFFSET 4
- call math_emulate
- addl $4, %esp
- CFI_ADJUST_CFA_OFFSET -4
- jmp ret_from_exception
+ jmp error_code
CFI_ENDPROC
END(device_not_available)
@@ -814,6 +804,7 @@ debug_stack_correct:
pushl $-1 # mark this as an int
CFI_ADJUST_CFA_OFFSET 4
SAVE_ALL
+ TRACE_IRQS_OFF
xorl %edx,%edx # error code 0
movl %esp,%eax # pt_regs pointer
call do_debug
@@ -858,6 +849,7 @@ nmi_stack_correct:
pushl %eax
CFI_ADJUST_CFA_OFFSET 4
SAVE_ALL
+ TRACE_IRQS_OFF
xorl %edx,%edx # zero error code
movl %esp,%eax # pt_regs pointer
call do_nmi
@@ -898,6 +890,7 @@ nmi_espfix_stack:
pushl %eax
CFI_ADJUST_CFA_OFFSET 4
SAVE_ALL
+ TRACE_IRQS_OFF
FIXUP_ESPFIX_STACK # %eax == %esp
xorl %edx,%edx # zero error code
call do_nmi
@@ -928,6 +921,7 @@ KPROBE_ENTRY(int3)
pushl $-1 # mark this as an int
CFI_ADJUST_CFA_OFFSET 4
SAVE_ALL
+ TRACE_IRQS_OFF
xorl %edx,%edx # zero error code
movl %esp,%eax # pt_regs pointer
call do_int3
@@ -1030,7 +1024,7 @@ ENTRY(machine_check)
RING0_INT_FRAME
pushl $0
CFI_ADJUST_CFA_OFFSET 4
- pushl machine_check_vector
+ pushl $do_machine_check
CFI_ADJUST_CFA_OFFSET 4
jmp error_code
CFI_ENDPROC
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index cf3a0b2..104fa65 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -932,6 +932,9 @@ END(spurious_interrupt)
.if \ist
movq %gs:pda_data_offset, %rbp
.endif
+ .if \irqtrace
+ TRACE_IRQS_OFF
+ .endif
movq %rsp,%rdi
movq ORIG_RAX(%rsp),%rsi
movq $-1,ORIG_RAX(%rsp)
@@ -1058,7 +1061,8 @@ KPROBE_ENTRY(error_entry)
je error_kernelspace
error_swapgs:
SWAPGS
-error_sti:
+error_sti:
+ TRACE_IRQS_OFF
movq %rdi,RDI(%rsp)
CFI_REL_OFFSET rdi,RDI
movq %rsp,%rdi
@@ -1232,7 +1236,7 @@ ENTRY(simd_coprocessor_error)
END(simd_coprocessor_error)
ENTRY(device_not_available)
- zeroentry math_state_restore
+ zeroentry do_device_not_available
END(device_not_available)
/* runs on exception stack */
diff --git a/arch/x86/kernel/es7000_32.c b/arch/x86/kernel/es7000_32.c
index 849e5cd..f454c78 100644
--- a/arch/x86/kernel/es7000_32.c
+++ b/arch/x86/kernel/es7000_32.c
@@ -109,6 +109,7 @@ struct oem_table {
};
extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
+extern void unmap_unisys_acpi_oem_table(unsigned long oem_addr);
#endif
struct mip_reg {
@@ -243,21 +244,38 @@ parse_unisys_oem (char *oemptr)
}
#ifdef CONFIG_ACPI
-int __init
-find_unisys_acpi_oem_table(unsigned long *oem_addr)
+static unsigned long oem_addrX;
+static unsigned long oem_size;
+int __init find_unisys_acpi_oem_table(unsigned long *oem_addr)
{
struct acpi_table_header *header = NULL;
int i = 0;
- while (ACPI_SUCCESS(acpi_get_table("OEM1", i++, &header))) {
+ acpi_size tbl_size;
+
+ while (ACPI_SUCCESS(acpi_get_table_with_size("OEM1", i++, &header, &tbl_size))) {
if (!memcmp((char *) &header->oem_id, "UNISYS", 6)) {
struct oem_table *t = (struct oem_table *)header;
- *oem_addr = (unsigned long)__acpi_map_table(t->OEMTableAddr,
- t->OEMTableSize);
+
+ oem_addrX = t->OEMTableAddr;
+ oem_size = t->OEMTableSize;
+ early_acpi_os_unmap_memory(header, tbl_size);
+
+ *oem_addr = (unsigned long)__acpi_map_table(oem_addrX,
+ oem_size);
return 0;
}
+ early_acpi_os_unmap_memory(header, tbl_size);
}
return -1;
}
+
+void __init unmap_unisys_acpi_oem_table(unsigned long oem_addr)
+{
+ if (!oem_addr)
+ return;
+
+ __acpi_unmap_table((char *)oem_addr, oem_size);
+}
#endif
static void
diff --git a/arch/x86/kernel/genx2apic_uv_x.c b/arch/x86/kernel/genx2apic_uv_x.c
index ae2ffc8..7b0ff40 100644
--- a/arch/x86/kernel/genx2apic_uv_x.c
+++ b/arch/x86/kernel/genx2apic_uv_x.c
@@ -114,7 +114,7 @@ static void uv_send_IPI_one(int cpu, int vector)
unsigned long val, apicid, lapicid;
int pnode;
- apicid = per_cpu(x86_cpu_to_apicid, cpu); /* ZZZ - cache node-local ? */
+ apicid = per_cpu(x86_cpu_to_apicid, cpu);
lapicid = apicid & 0x3f; /* ZZZ macro needed */
pnode = uv_apicid_to_pnode(apicid);
val =
@@ -202,12 +202,10 @@ static unsigned int phys_pkg_id(int index_msb)
return uv_read_apic_id() >> index_msb;
}
-#ifdef ZZZ /* Needs x2apic patch */
static void uv_send_IPI_self(int vector)
{
apic_write(APIC_SELF_IPI, vector);
}
-#endif
struct genapic apic_x2apic_uv_x = {
.name = "UV large system",
@@ -215,15 +213,15 @@ struct genapic apic_x2apic_uv_x = {
.int_delivery_mode = dest_Fixed,
.int_dest_mode = (APIC_DEST_PHYSICAL != 0),
.target_cpus = uv_target_cpus,
- .vector_allocation_domain = uv_vector_allocation_domain,/* Fixme ZZZ */
+ .vector_allocation_domain = uv_vector_allocation_domain,
.apic_id_registered = uv_apic_id_registered,
.init_apic_ldr = uv_init_apic_ldr,
.send_IPI_all = uv_send_IPI_all,
.send_IPI_allbutself = uv_send_IPI_allbutself,
.send_IPI_mask = uv_send_IPI_mask,
- /* ZZZ.send_IPI_self = uv_send_IPI_self, */
+ .send_IPI_self = uv_send_IPI_self,
.cpu_mask_to_apicid = uv_cpu_mask_to_apicid,
- .phys_pkg_id = phys_pkg_id, /* Fixme ZZZ */
+ .phys_pkg_id = phys_pkg_id,
.get_apic_id = get_apic_id,
.set_apic_id = set_apic_id,
.apic_id_mask = (0xFFFFFFFFu),
diff --git a/arch/x86/kernel/head.c b/arch/x86/kernel/head.c
index 3e66bd3..1dcb0f1 100644
--- a/arch/x86/kernel/head.c
+++ b/arch/x86/kernel/head.c
@@ -35,6 +35,7 @@ void __init reserve_ebda_region(void)
/* start of EBDA area */
ebda_addr = get_bios_ebda();
+ printk(KERN_INFO "BIOS EBDA/lowmem at: %08x/%08x\n", ebda_addr, lowmem);
/* Fixup: bios puts an EBDA in the top 64K segment */
/* of conventional memory, but does not adjust lowmem. */
diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 0ed5f93..eee32b4 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -52,6 +52,8 @@ static int alloc_ldt(mm_context_t *pc, int mincount, int reload)
memset(newldt + oldsize * LDT_ENTRY_SIZE, 0,
(mincount - oldsize) * LDT_ENTRY_SIZE);
+ paravirt_alloc_ldt(newldt, mincount);
+
#ifdef CONFIG_X86_64
/* CHECKME: Do we really need this ? */
wmb();
@@ -74,6 +76,7 @@ static int alloc_ldt(mm_context_t *pc, int mincount, int reload)
#endif
}
if (oldsize) {
+ paravirt_free_ldt(oldldt, oldsize);
if (oldsize * LDT_ENTRY_SIZE > PAGE_SIZE)
vfree(oldldt);
else
@@ -85,10 +88,13 @@ static int alloc_ldt(mm_context_t *pc, int mincount, int reload)
static inline int copy_ldt(mm_context_t *new, mm_context_t *old)
{
int err = alloc_ldt(new, old->size, 0);
+ int i;
if (err < 0)
return err;
- memcpy(new->ldt, old->ldt, old->size * LDT_ENTRY_SIZE);
+
+ for(i = 0; i < old->size; i++)
+ write_ldt_entry(new->ldt, i, old->ldt + i * LDT_ENTRY_SIZE);
return 0;
}
@@ -125,6 +131,7 @@ void destroy_context(struct mm_struct *mm)
if (mm == current->active_mm)
clear_LDT();
#endif
+ paravirt_free_ldt(mm->context.ldt, mm->context.size);
if (mm->context.size * LDT_ENTRY_SIZE > PAGE_SIZE)
vfree(mm->context.ldt);
else
diff --git a/arch/x86/kernel/paravirt-spinlocks.c b/arch/x86/kernel/paravirt-spinlocks.c
new file mode 100644
index 0000000..0e9f198
--- /dev/null
+++ b/arch/x86/kernel/paravirt-spinlocks.c
@@ -0,0 +1,37 @@
+/*
+ * Split spinlock implementation out into its own file, so it can be
+ * compiled in a FTRACE-compatible way.
+ */
+#include <linux/spinlock.h>
+#include <linux/module.h>
+
+#include <asm/paravirt.h>
+
+static void default_spin_lock_flags(struct raw_spinlock *lock, unsigned long flags)
+{
+ __raw_spin_lock(lock);
+}
+
+struct pv_lock_ops pv_lock_ops = {
+#ifdef CONFIG_SMP
+ .spin_is_locked = __ticket_spin_is_locked,
+ .spin_is_contended = __ticket_spin_is_contended,
+
+ .spin_lock = __ticket_spin_lock,
+ .spin_lock_flags = default_spin_lock_flags,
+ .spin_trylock = __ticket_spin_trylock,
+ .spin_unlock = __ticket_spin_unlock,
+#endif
+};
+EXPORT_SYMBOL(pv_lock_ops);
+
+void __init paravirt_use_bytelocks(void)
+{
+#ifdef CONFIG_SMP
+ pv_lock_ops.spin_is_locked = __byte_spin_is_locked;
+ pv_lock_ops.spin_is_contended = __byte_spin_is_contended;
+ pv_lock_ops.spin_lock = __byte_spin_lock;
+ pv_lock_ops.spin_trylock = __byte_spin_trylock;
+ pv_lock_ops.spin_unlock = __byte_spin_unlock;
+#endif
+}
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 6b0bb73..e4c8fb6 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -268,17 +268,6 @@ enum paravirt_lazy_mode paravirt_get_lazy_mode(void)
return __get_cpu_var(paravirt_lazy_mode);
}
-void __init paravirt_use_bytelocks(void)
-{
-#ifdef CONFIG_SMP
- pv_lock_ops.spin_is_locked = __byte_spin_is_locked;
- pv_lock_ops.spin_is_contended = __byte_spin_is_contended;
- pv_lock_ops.spin_lock = __byte_spin_lock;
- pv_lock_ops.spin_trylock = __byte_spin_trylock;
- pv_lock_ops.spin_unlock = __byte_spin_unlock;
-#endif
-}
-
struct pv_info pv_info = {
.name = "bare hardware",
.paravirt_enabled = 0,
@@ -349,6 +338,10 @@ struct pv_cpu_ops pv_cpu_ops = {
.write_ldt_entry = native_write_ldt_entry,
.write_gdt_entry = native_write_gdt_entry,
.write_idt_entry = native_write_idt_entry,
+
+ .alloc_ldt = paravirt_nop,
+ .free_ldt = paravirt_nop,
+
.load_sp0 = native_load_sp0,
#if defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION)
@@ -460,18 +453,6 @@ struct pv_mmu_ops pv_mmu_ops = {
.set_fixmap = native_set_fixmap,
};
-struct pv_lock_ops pv_lock_ops = {
-#ifdef CONFIG_SMP
- .spin_is_locked = __ticket_spin_is_locked,
- .spin_is_contended = __ticket_spin_is_contended,
-
- .spin_lock = __ticket_spin_lock,
- .spin_trylock = __ticket_spin_trylock,
- .spin_unlock = __ticket_spin_unlock,
-#endif
-};
-EXPORT_SYMBOL(pv_lock_ops);
-
EXPORT_SYMBOL_GPL(pv_time_ops);
EXPORT_SYMBOL (pv_cpu_ops);
EXPORT_SYMBOL (pv_mmu_ops);
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
deleted file mode 100644
index 205188d..0000000
--- a/arch/x86/kernel/process_32.c
+++ /dev/null
@@ -1,768 +0,0 @@
-/*
- * Copyright (C) 1995 Linus Torvalds
- *
- * Pentium III FXSR, SSE support
- * Gareth Hughes <gareth@valinux.com>, May 2000
- */
-
-/*
- * This file handles the architecture-dependent parts of process handling..
- */
-
-#include <stdarg.h>
-
-#include <linux/cpu.h>
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/fs.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/elfcore.h>
-#include <linux/smp.h>
-#include <linux/stddef.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include <linux/user.h>
-#include <linux/interrupt.h>
-#include <linux/utsname.h>
-#include <linux/delay.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/mc146818rtc.h>
-#include <linux/module.h>
-#include <linux/kallsyms.h>
-#include <linux/ptrace.h>
-#include <linux/random.h>
-#include <linux/personality.h>
-#include <linux/tick.h>
-#include <linux/percpu.h>
-#include <linux/prctl.h>
-#include <linux/dmi.h>
-
-#include <asm/uaccess.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/ldt.h>
-#include <asm/processor.h>
-#include <asm/i387.h>
-#include <asm/desc.h>
-#ifdef CONFIG_MATH_EMULATION
-#include <asm/math_emu.h>
-#endif
-
-#include <linux/err.h>
-
-#include <asm/tlbflush.h>
-#include <asm/cpu.h>
-#include <asm/kdebug.h>
-#include <asm/idle.h>
-#include <asm/syscalls.h>
-#include <asm/smp.h>
-
-asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
-
-DEFINE_PER_CPU(struct task_struct *, current_task) = &init_task;
-EXPORT_PER_CPU_SYMBOL(current_task);
-
-DEFINE_PER_CPU(int, cpu_number);
-EXPORT_PER_CPU_SYMBOL(cpu_number);
-
-/*
- * Return saved PC of a blocked thread.
- */
-unsigned long thread_saved_pc(struct task_struct *tsk)
-{
- return ((unsigned long *)tsk->thread.sp)[3];
-}
-
-#ifdef CONFIG_HOTPLUG_CPU
-#include <asm/nmi.h>
-
-static void cpu_exit_clear(void)
-{
- int cpu = raw_smp_processor_id();
-
- idle_task_exit();
-
- cpu_uninit();
- irq_ctx_exit(cpu);
-
- cpu_clear(cpu, cpu_callout_map);
- cpu_clear(cpu, cpu_callin_map);
-
- numa_remove_cpu(cpu);
- c1e_remove_cpu(cpu);
-}
-
-/* We don't actually take CPU down, just spin without interrupts. */
-static inline void play_dead(void)
-{
- /* This must be done before dead CPU ack */
- cpu_exit_clear();
- mb();
- /* Ack it */
- __get_cpu_var(cpu_state) = CPU_DEAD;
-
- /*
- * With physical CPU hotplug, we should halt the cpu
- */
- local_irq_disable();
- /* mask all interrupts, flush any and all caches, and halt */
- wbinvd_halt();
-}
-#else
-static inline void play_dead(void)
-{
- BUG();
-}
-#endif /* CONFIG_HOTPLUG_CPU */
-
-/*
- * The idle thread. There's no useful work to be
- * done, so just try to conserve power and have a
- * low exit latency (ie sit in a loop waiting for
- * somebody to say that they'd like to reschedule)
- */
-void cpu_idle(void)
-{
- int cpu = smp_processor_id();
-
- current_thread_info()->status |= TS_POLLING;
-
- /* endless idle loop with no priority at all */
- while (1) {
- tick_nohz_stop_sched_tick(1);
- while (!need_resched()) {
-
- check_pgt_cache();
- rmb();
-
- if (rcu_pending(cpu))
- rcu_check_callbacks(cpu, 0);
-
- if (cpu_is_offline(cpu))
- play_dead();
-
- local_irq_disable();
- __get_cpu_var(irq_stat).idle_timestamp = jiffies;
- /* Don't trace irqs off for idle */
- stop_critical_timings();
- pm_idle();
- start_critical_timings();
- }
- tick_nohz_restart_sched_tick();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
- }
-}
-
-void __show_registers(struct pt_regs *regs, int all)
-{
- unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;
- unsigned long d0, d1, d2, d3, d6, d7;
- unsigned long sp;
- unsigned short ss, gs;
- const char *board;
-
- if (user_mode_vm(regs)) {
- sp = regs->sp;
- ss = regs->ss & 0xffff;
- savesegment(gs, gs);
- } else {
- sp = (unsigned long) (®s->sp);
- savesegment(ss, ss);
- savesegment(gs, gs);
- }
-
- printk("\n");
-
- board = dmi_get_system_info(DMI_PRODUCT_NAME);
- if (!board)
- board = "";
- printk("Pid: %d, comm: %s %s (%s %.*s) %s\n",
- task_pid_nr(current), current->comm,
- print_tainted(), init_utsname()->release,
- (int)strcspn(init_utsname()->version, " "),
- init_utsname()->version, board);
-
- printk("EIP: %04x:[<%08lx>] EFLAGS: %08lx CPU: %d\n",
- (u16)regs->cs, regs->ip, regs->flags,
- smp_processor_id());
- print_symbol("EIP is at %s\n", regs->ip);
-
- printk("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n",
- regs->ax, regs->bx, regs->cx, regs->dx);
- printk("ESI: %08lx EDI: %08lx EBP: %08lx ESP: %08lx\n",
- regs->si, regs->di, regs->bp, sp);
- printk(" DS: %04x ES: %04x FS: %04x GS: %04x SS: %04x\n",
- (u16)regs->ds, (u16)regs->es, (u16)regs->fs, gs, ss);
-
- if (!all)
- return;
-
- cr0 = read_cr0();
- cr2 = read_cr2();
- cr3 = read_cr3();
- cr4 = read_cr4_safe();
- printk("CR0: %08lx CR2: %08lx CR3: %08lx CR4: %08lx\n",
- cr0, cr2, cr3, cr4);
-
- get_debugreg(d0, 0);
- get_debugreg(d1, 1);
- get_debugreg(d2, 2);
- get_debugreg(d3, 3);
- printk("DR0: %08lx DR1: %08lx DR2: %08lx DR3: %08lx\n",
- d0, d1, d2, d3);
-
- get_debugreg(d6, 6);
- get_debugreg(d7, 7);
- printk("DR6: %08lx DR7: %08lx\n",
- d6, d7);
-}
-
-void show_regs(struct pt_regs *regs)
-{
- __show_registers(regs, 1);
- show_trace(NULL, regs, ®s->sp, regs->bp);
-}
-
-/*
- * This gets run with %bx containing the
- * function to call, and %dx containing
- * the "args".
- */
-extern void kernel_thread_helper(void);
-
-/*
- * Create a kernel thread
- */
-int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(®s, 0, sizeof(regs));
-
- regs.bx = (unsigned long) fn;
- regs.dx = (unsigned long) arg;
-
- regs.ds = __USER_DS;
- regs.es = __USER_DS;
- regs.fs = __KERNEL_PERCPU;
- regs.orig_ax = -1;
- regs.ip = (unsigned long) kernel_thread_helper;
- regs.cs = __KERNEL_CS | get_kernel_rpl();
- regs.flags = X86_EFLAGS_IF | X86_EFLAGS_SF | X86_EFLAGS_PF | 0x2;
-
- /* Ok, create the new process.. */
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, ®s, 0, NULL, NULL);
-}
-EXPORT_SYMBOL(kernel_thread);
-
-/*
- * Free current thread data structures etc..
- */
-void exit_thread(void)
-{
- /* The process may have allocated an io port bitmap... nuke it. */
- if (unlikely(test_thread_flag(TIF_IO_BITMAP))) {
- struct task_struct *tsk = current;
- struct thread_struct *t = &tsk->thread;
- int cpu = get_cpu();
- struct tss_struct *tss = &per_cpu(init_tss, cpu);
-
- kfree(t->io_bitmap_ptr);
- t->io_bitmap_ptr = NULL;
- clear_thread_flag(TIF_IO_BITMAP);
- /*
- * Careful, clear this in the TSS too:
- */
- memset(tss->io_bitmap, 0xff, tss->io_bitmap_max);
- t->io_bitmap_max = 0;
- tss->io_bitmap_owner = NULL;
- tss->io_bitmap_max = 0;
- tss->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
- put_cpu();
- }
-#ifdef CONFIG_X86_DS
- /* Free any DS contexts that have not been properly released. */
- if (unlikely(current->thread.ds_ctx)) {
- /* we clear debugctl to make sure DS is not used. */
- update_debugctlmsr(0);
- ds_free(current->thread.ds_ctx);
- }
-#endif /* CONFIG_X86_DS */
-}
-
-void flush_thread(void)
-{
- struct task_struct *tsk = current;
-
- tsk->thread.debugreg0 = 0;
- tsk->thread.debugreg1 = 0;
- tsk->thread.debugreg2 = 0;
- tsk->thread.debugreg3 = 0;
- tsk->thread.debugreg6 = 0;
- tsk->thread.debugreg7 = 0;
- memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array));
- clear_tsk_thread_flag(tsk, TIF_DEBUG);
- /*
- * Forget coprocessor state..
- */
- tsk->fpu_counter = 0;
- clear_fpu(tsk);
- clear_used_math();
-}
-
-void release_thread(struct task_struct *dead_task)
-{
- BUG_ON(dead_task->mm);
- release_vm86_irqs(dead_task);
-}
-
-/*
- * This gets called before we allocate a new thread and copy
- * the current task into it.
- */
-void prepare_to_copy(struct task_struct *tsk)
-{
- unlazy_fpu(tsk);
-}
-
-int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
- unsigned long unused,
- struct task_struct * p, struct pt_regs * regs)
-{
- struct pt_regs * childregs;
- struct task_struct *tsk;
- int err;
-
- childregs = task_pt_regs(p);
- *childregs = *regs;
- childregs->ax = 0;
- childregs->sp = sp;
-
- p->thread.sp = (unsigned long) childregs;
- p->thread.sp0 = (unsigned long) (childregs+1);
-
- p->thread.ip = (unsigned long) ret_from_fork;
-
- savesegment(gs, p->thread.gs);
-
- tsk = current;
- if (unlikely(test_tsk_thread_flag(tsk, TIF_IO_BITMAP))) {
- p->thread.io_bitmap_ptr = kmemdup(tsk->thread.io_bitmap_ptr,
- IO_BITMAP_BYTES, GFP_KERNEL);
- if (!p->thread.io_bitmap_ptr) {
- p->thread.io_bitmap_max = 0;
- return -ENOMEM;
- }
- set_tsk_thread_flag(p, TIF_IO_BITMAP);
- }
-
- err = 0;
-
- /*
- * Set a new TLS for the child thread?
- */
- if (clone_flags & CLONE_SETTLS)
- err = do_set_thread_area(p, -1,
- (struct user_desc __user *)childregs->si, 0);
-
- if (err && p->thread.io_bitmap_ptr) {
- kfree(p->thread.io_bitmap_ptr);
- p->thread.io_bitmap_max = 0;
- }
- return err;
-}
-
-void
-start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
-{
- __asm__("movl %0, %%gs" :: "r"(0));
- regs->fs = 0;
- set_fs(USER_DS);
- regs->ds = __USER_DS;
- regs->es = __USER_DS;
- regs->ss = __USER_DS;
- regs->cs = __USER_CS;
- regs->ip = new_ip;
- regs->sp = new_sp;
- /*
- * Free the old FP and other extended state
- */
- free_thread_xstate(current);
-}
-EXPORT_SYMBOL_GPL(start_thread);
-
-static void hard_disable_TSC(void)
-{
- write_cr4(read_cr4() | X86_CR4_TSD);
-}
-
-void disable_TSC(void)
-{
- preempt_disable();
- if (!test_and_set_thread_flag(TIF_NOTSC))
- /*
- * Must flip the CPU state synchronously with
- * TIF_NOTSC in the current running context.
- */
- hard_disable_TSC();
- preempt_enable();
-}
-
-static void hard_enable_TSC(void)
-{
- write_cr4(read_cr4() & ~X86_CR4_TSD);
-}
-
-static void enable_TSC(void)
-{
- preempt_disable();
- if (test_and_clear_thread_flag(TIF_NOTSC))
- /*
- * Must flip the CPU state synchronously with
- * TIF_NOTSC in the current running context.
- */
- hard_enable_TSC();
- preempt_enable();
-}
-
-int get_tsc_mode(unsigned long adr)
-{
- unsigned int val;
-
- if (test_thread_flag(TIF_NOTSC))
- val = PR_TSC_SIGSEGV;
- else
- val = PR_TSC_ENABLE;
-
- return put_user(val, (unsigned int __user *)adr);
-}
-
-int set_tsc_mode(unsigned int val)
-{
- if (val == PR_TSC_SIGSEGV)
- disable_TSC();
- else if (val == PR_TSC_ENABLE)
- enable_TSC();
- else
- return -EINVAL;
-
- return 0;
-}
-
-#ifdef CONFIG_X86_DS
-static int update_debugctl(struct thread_struct *prev,
- struct thread_struct *next, unsigned long debugctl)
-{
- unsigned long ds_prev = 0;
- unsigned long ds_next = 0;
-
- if (prev->ds_ctx)
- ds_prev = (unsigned long)prev->ds_ctx->ds;
- if (next->ds_ctx)
- ds_next = (unsigned long)next->ds_ctx->ds;
-
- if (ds_next != ds_prev) {
- /* we clear debugctl to make sure DS
- * is not in use when we change it */
- debugctl = 0;
- update_debugctlmsr(0);
- wrmsr(MSR_IA32_DS_AREA, ds_next, 0);
- }
- return debugctl;
-}
-#else
-static int update_debugctl(struct thread_struct *prev,
- struct thread_struct *next, unsigned long debugctl)
-{
- return debugctl;
-}
-#endif /* CONFIG_X86_DS */
-
-static noinline void
-__switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
- struct tss_struct *tss)
-{
- struct thread_struct *prev, *next;
- unsigned long debugctl;
-
- prev = &prev_p->thread;
- next = &next_p->thread;
-
- debugctl = update_debugctl(prev, next, prev->debugctlmsr);
-
- if (next->debugctlmsr != debugctl)
- update_debugctlmsr(next->debugctlmsr);
-
- if (test_tsk_thread_flag(next_p, TIF_DEBUG)) {
- set_debugreg(next->debugreg0, 0);
- set_debugreg(next->debugreg1, 1);
- set_debugreg(next->debugreg2, 2);
- set_debugreg(next->debugreg3, 3);
- /* no 4 and 5 */
- set_debugreg(next->debugreg6, 6);
- set_debugreg(next->debugreg7, 7);
- }
-
- if (test_tsk_thread_flag(prev_p, TIF_NOTSC) ^
- test_tsk_thread_flag(next_p, TIF_NOTSC)) {
- /* prev and next are different */
- if (test_tsk_thread_flag(next_p, TIF_NOTSC))
- hard_disable_TSC();
- else
- hard_enable_TSC();
- }
-
-#ifdef CONFIG_X86_PTRACE_BTS
- if (test_tsk_thread_flag(prev_p, TIF_BTS_TRACE_TS))
- ptrace_bts_take_timestamp(prev_p, BTS_TASK_DEPARTS);
-
- if (test_tsk_thread_flag(next_p, TIF_BTS_TRACE_TS))
- ptrace_bts_take_timestamp(next_p, BTS_TASK_ARRIVES);
-#endif /* CONFIG_X86_PTRACE_BTS */
-
-
- if (!test_tsk_thread_flag(next_p, TIF_IO_BITMAP)) {
- /*
- * Disable the bitmap via an invalid offset. We still cache
- * the previous bitmap owner and the IO bitmap contents:
- */
- tss->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
- return;
- }
-
- if (likely(next == tss->io_bitmap_owner)) {
- /*
- * Previous owner of the bitmap (hence the bitmap content)
- * matches the next task, we dont have to do anything but
- * to set a valid offset in the TSS:
- */
- tss->x86_tss.io_bitmap_base = IO_BITMAP_OFFSET;
- return;
- }
- /*
- * Lazy TSS's I/O bitmap copy. We set an invalid offset here
- * and we let the task to get a GPF in case an I/O instruction
- * is performed. The handler of the GPF will verify that the
- * faulting task has a valid I/O bitmap and, it true, does the
- * real copy and restart the instruction. This will save us
- * redundant copies when the currently switched task does not
- * perform any I/O during its timeslice.
- */
- tss->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET_LAZY;
-}
-
-/*
- * switch_to(x,yn) should switch tasks from x to y.
- *
- * We fsave/fwait so that an exception goes off at the right time
- * (as a call from the fsave or fwait in effect) rather than to
- * the wrong process. Lazy FP saving no longer makes any sense
- * with modern CPU's, and this simplifies a lot of things (SMP
- * and UP become the same).
- *
- * NOTE! We used to use the x86 hardware context switching. The
- * reason for not using it any more becomes apparent when you
- * try to recover gracefully from saved state that is no longer
- * valid (stale segment register values in particular). With the
- * hardware task-switch, there is no way to fix up bad state in
- * a reasonable manner.
- *
- * The fact that Intel documents the hardware task-switching to
- * be slow is a fairly red herring - this code is not noticeably
- * faster. However, there _is_ some room for improvement here,
- * so the performance issues may eventually be a valid point.
- * More important, however, is the fact that this allows us much
- * more flexibility.
- *
- * The return value (in %ax) will be the "prev" task after
- * the task-switch, and shows up in ret_from_fork in entry.S,
- * for example.
- */
-struct task_struct * __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
-{
- struct thread_struct *prev = &prev_p->thread,
- *next = &next_p->thread;
- int cpu = smp_processor_id();
- struct tss_struct *tss = &per_cpu(init_tss, cpu);
-
- /* never put a printk in __switch_to... printk() calls wake_up*() indirectly */
-
- __unlazy_fpu(prev_p);
-
-
- /* we're going to use this soon, after a few expensive things */
- if (next_p->fpu_counter > 5)
- prefetch(next->xstate);
-
- /*
- * Reload esp0.
- */
- load_sp0(tss, next);
-
- /*
- * Save away %gs. No need to save %fs, as it was saved on the
- * stack on entry. No need to save %es and %ds, as those are
- * always kernel segments while inside the kernel. Doing this
- * before setting the new TLS descriptors avoids the situation
- * where we temporarily have non-reloadable segments in %fs
- * and %gs. This could be an issue if the NMI handler ever
- * used %fs or %gs (it does not today), or if the kernel is
- * running inside of a hypervisor layer.
- */
- savesegment(gs, prev->gs);
-
- /*
- * Load the per-thread Thread-Local Storage descriptor.
- */
- load_TLS(next, cpu);
-
- /*
- * Restore IOPL if needed. In normal use, the flags restore
- * in the switch assembly will handle this. But if the kernel
- * is running virtualized at a non-zero CPL, the popf will
- * not restore flags, so it must be done in a separate step.
- */
- if (get_kernel_rpl() && unlikely(prev->iopl != next->iopl))
- set_iopl_mask(next->iopl);
-
- /*
- * Now maybe handle debug registers and/or IO bitmaps
- */
- if (unlikely(task_thread_info(prev_p)->flags & _TIF_WORK_CTXSW_PREV ||
- task_thread_info(next_p)->flags & _TIF_WORK_CTXSW_NEXT))
- __switch_to_xtra(prev_p, next_p, tss);
-
- /*
- * Leave lazy mode, flushing any hypercalls made here.
- * This must be done before restoring TLS segments so
- * the GDT and LDT are properly updated, and must be
- * done before math_state_restore, so the TS bit is up
- * to date.
- */
- arch_leave_lazy_cpu_mode();
-
- /* If the task has used fpu the last 5 timeslices, just do a full
- * restore of the math state immediately to avoid the trap; the
- * chances of needing FPU soon are obviously high now
- *
- * tsk_used_math() checks prevent calling math_state_restore(),
- * which can sleep in the case of !tsk_used_math()
- */
- if (tsk_used_math(next_p) && next_p->fpu_counter > 5)
- math_state_restore();
-
- /*
- * Restore %gs if needed (which is common)
- */
- if (prev->gs | next->gs)
- loadsegment(gs, next->gs);
-
- x86_write_percpu(current_task, next_p);
-
- return prev_p;
-}
-
-asmlinkage int sys_fork(struct pt_regs regs)
-{
- return do_fork(SIGCHLD, regs.sp, ®s, 0, NULL, NULL);
-}
-
-asmlinkage int sys_clone(struct pt_regs regs)
-{
- unsigned long clone_flags;
- unsigned long newsp;
- int __user *parent_tidptr, *child_tidptr;
-
- clone_flags = regs.bx;
- newsp = regs.cx;
- parent_tidptr = (int __user *)regs.dx;
- child_tidptr = (int __user *)regs.di;
- if (!newsp)
- newsp = regs.sp;
- return do_fork(clone_flags, newsp, ®s, 0, parent_tidptr, child_tidptr);
-}
-
-/*
- * This is trivial, and on the face of it looks like it
- * could equally well be done in user mode.
- *
- * Not so, for quite unobvious reasons - register pressure.
- * In user mode vfork() cannot have a stack frame, and if
- * done by calling the "clone()" system call directly, you
- * do not have enough call-clobbered registers to hold all
- * the information you need.
- */
-asmlinkage int sys_vfork(struct pt_regs regs)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.sp, ®s, 0, NULL, NULL);
-}
-
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage int sys_execve(struct pt_regs regs)
-{
- int error;
- char * filename;
-
- filename = getname((char __user *) regs.bx);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- error = do_execve(filename,
- (char __user * __user *) regs.cx,
- (char __user * __user *) regs.dx,
- ®s);
- if (error == 0) {
- /* Make sure we don't return using sysenter.. */
- set_thread_flag(TIF_IRET);
- }
- putname(filename);
-out:
- return error;
-}
-
-#define top_esp (THREAD_SIZE - sizeof(unsigned long))
-#define top_ebp (THREAD_SIZE - 2*sizeof(unsigned long))
-
-unsigned long get_wchan(struct task_struct *p)
-{
- unsigned long bp, sp, ip;
- unsigned long stack_page;
- int count = 0;
- if (!p || p == current || p->state == TASK_RUNNING)
- return 0;
- stack_page = (unsigned long)task_stack_page(p);
- sp = p->thread.sp;
- if (!stack_page || sp < stack_page || sp > top_esp+stack_page)
- return 0;
- /* include/asm-i386/system.h:switch_to() pushes bp last. */
- bp = *(unsigned long *) sp;
- do {
- if (bp < stack_page || bp > top_ebp+stack_page)
- return 0;
- ip = *(unsigned long *) (bp+4);
- if (!in_sched_functions(ip))
- return ip;
- bp = *(unsigned long *) bp;
- } while (count++ < 16);
- return 0;
-}
-
-unsigned long arch_align_stack(unsigned long sp)
-{
- if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
- sp -= get_random_int() % 8192;
- return sp & ~0xf;
-}
-
-unsigned long arch_randomize_brk(struct mm_struct *mm)
-{
- unsigned long range_end = mm->brk + 0x02000000;
- return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
-}
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 2a8ccb9..410cc5f 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -86,30 +86,12 @@ void exit_idle(void)
__exit_idle();
}
-#ifdef CONFIG_HOTPLUG_CPU
-DECLARE_PER_CPU(int, cpu_state);
-
-#include <linux/nmi.h>
-/* We halt the CPU with physical CPU hotplug */
-static inline void play_dead(void)
-{
- idle_task_exit();
- c1e_remove_cpu(raw_smp_processor_id());
-
- mb();
- /* Ack it */
- __get_cpu_var(cpu_state) = CPU_DEAD;
-
- local_irq_disable();
- /* mask all interrupts, flush any and all caches, and halt */
- wbinvd_halt();
-}
-#else
+#ifndef CONFIG_SMP
static inline void play_dead(void)
{
BUG();
}
-#endif /* CONFIG_HOTPLUG_CPU */
+#endif
/*
* The idle thread. There's no useful work to be
@@ -154,7 +136,7 @@ void cpu_idle(void)
}
/* Prints also some state that isn't saved in the pt_regs */
-void __show_regs(struct pt_regs *regs)
+void __show_regs(struct pt_regs *regs, int all)
{
unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L, fs, gs, shadowgs;
unsigned long d0, d1, d2, d3, d6, d7;
@@ -193,13 +175,20 @@ void __show_regs(struct pt_regs *regs)
rdmsrl(MSR_GS_BASE, gs);
rdmsrl(MSR_KERNEL_GS_BASE, shadowgs);
+ if (!all)
+ return;
+
+ printk(KERN_INFO "FS: %016lx(%04x) GS:%016lx(%04x) knlGS:%016lx\n",
+ fs, fsindex, gs, gsindex, shadowgs);
+
+ if (!all)
+ return;
+
cr0 = read_cr0();
cr2 = read_cr2();
cr3 = read_cr3();
cr4 = read_cr4();
- printk(KERN_INFO "FS: %016lx(%04x) GS:%016lx(%04x) knlGS:%016lx\n",
- fs, fsindex, gs, gsindex, shadowgs);
printk(KERN_INFO "CS: %04x DS: %04x ES: %04x CR0: %016lx\n", cs, ds,
es, cr0);
printk(KERN_INFO "CR2: %016lx CR3: %016lx CR4: %016lx\n", cr2, cr3,
@@ -218,7 +207,7 @@ void __show_regs(struct pt_regs *regs)
void show_regs(struct pt_regs *regs)
{
printk(KERN_INFO "CPU %d:", smp_processor_id());
- __show_regs(regs);
+ __show_regs(regs, 1);
show_trace(NULL, regs, (void *)(regs + 1), regs->bp);
}
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 46c98ef..09ee73a 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -302,7 +302,7 @@ static void __init relocate_initrd(void)
if (clen > MAX_MAP_CHUNK-slop)
clen = MAX_MAP_CHUNK-slop;
mapaddr = ramdisk_image & PAGE_MASK;
- p = early_ioremap(mapaddr, clen+slop);
+ p = early_memremap(mapaddr, clen+slop);
memcpy(q, p+slop, clen);
early_iounmap(p, clen+slop);
q += clen;
@@ -379,7 +379,7 @@ static void __init parse_setup_data(void)
return;
pa_data = boot_params.hdr.setup_data;
while (pa_data) {
- data = early_ioremap(pa_data, PAGE_SIZE);
+ data = early_memremap(pa_data, PAGE_SIZE);
switch (data->type) {
case SETUP_E820_EXT:
parse_e820_ext(data, pa_data);
@@ -402,7 +402,7 @@ static void __init e820_reserve_setup_data(void)
return;
pa_data = boot_params.hdr.setup_data;
while (pa_data) {
- data = early_ioremap(pa_data, sizeof(*data));
+ data = early_memremap(pa_data, sizeof(*data));
e820_update_range(pa_data, sizeof(*data)+data->len,
E820_RAM, E820_RESERVED_KERN);
found = 1;
@@ -428,7 +428,7 @@ static void __init reserve_early_setup_data(void)
return;
pa_data = boot_params.hdr.setup_data;
while (pa_data) {
- data = early_ioremap(pa_data, sizeof(*data));
+ data = early_memremap(pa_data, sizeof(*data));
sprintf(buf, "setup data %x", data->type);
reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
pa_data = data->next;
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index 361b7a4..18f9b19 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -214,12 +214,16 @@ void smp_call_function_single_interrupt(struct pt_regs *regs)
struct smp_ops smp_ops = {
.smp_prepare_boot_cpu = native_smp_prepare_boot_cpu,
.smp_prepare_cpus = native_smp_prepare_cpus,
- .cpu_up = native_cpu_up,
.smp_cpus_done = native_smp_cpus_done,
.smp_send_stop = native_smp_send_stop,
.smp_send_reschedule = native_smp_send_reschedule,
+ .cpu_up = native_cpu_up,
+ .cpu_die = native_cpu_die,
+ .cpu_disable = native_cpu_disable,
+ .play_dead = native_play_dead,
+
.send_call_func_ipi = native_send_call_func_ipi,
.send_call_func_single_ipi = native_send_call_func_single_ipi,
};
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 2ff0bbc..d6a4d95 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -52,6 +52,7 @@
#include <asm/desc.h>
#include <asm/nmi.h>
#include <asm/irq.h>
+#include <asm/idle.h>
#include <asm/smp.h>
#include <asm/trampoline.h>
#include <asm/cpu.h>
@@ -332,14 +333,17 @@ static void __cpuinit start_secondary(void *unused)
* does not change while we are assigning vectors to cpus. Holding
* this lock ensures we don't half assign or remove an irq from a cpu.
*/
- ipi_call_lock_irq();
+ ipi_call_lock();
lock_vector_lock();
__setup_vector_irq(smp_processor_id());
cpu_set(smp_processor_id(), cpu_online_map);
unlock_vector_lock();
- ipi_call_unlock_irq();
+ ipi_call_unlock();
per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
+ /* enable local interrupts */
+ local_irq_enable();
+
setup_secondary_clock();
wmb();
@@ -594,10 +598,12 @@ wakeup_secondary_cpu(int logical_apicid, unsigned long start_eip)
* Give the other CPU some time to accept the IPI.
*/
udelay(200);
- maxlvt = lapic_get_maxlvt();
- if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */
- apic_write(APIC_ESR, 0);
- accept_status = (apic_read(APIC_ESR) & 0xEF);
+ if (APIC_INTEGRATED(apic_version[phys_apicid])) {
+ maxlvt = lapic_get_maxlvt();
+ if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */
+ apic_write(APIC_ESR, 0);
+ accept_status = (apic_read(APIC_ESR) & 0xEF);
+ }
pr_debug("NMI sent.\n");
if (send_status)
@@ -1254,39 +1260,6 @@ void __init native_smp_cpus_done(unsigned int max_cpus)
check_nmi_watchdog();
}
-#ifdef CONFIG_HOTPLUG_CPU
-
-static void remove_siblinginfo(int cpu)
-{
- int sibling;
- struct cpuinfo_x86 *c = &cpu_data(cpu);
-
- for_each_cpu_mask_nr(sibling, per_cpu(cpu_core_map, cpu)) {
- cpu_clear(cpu, per_cpu(cpu_core_map, sibling));
- /*/
- * last thread sibling in this cpu core going down
- */
- if (cpus_weight(per_cpu(cpu_sibling_map, cpu)) == 1)
- cpu_data(sibling).booted_cores--;
- }
-
- for_each_cpu_mask_nr(sibling, per_cpu(cpu_sibling_map, cpu))
- cpu_clear(cpu, per_cpu(cpu_sibling_map, sibling));
- cpus_clear(per_cpu(cpu_sibling_map, cpu));
- cpus_clear(per_cpu(cpu_core_map, cpu));
- c->phys_proc_id = 0;
- c->cpu_core_id = 0;
- cpu_clear(cpu, cpu_sibling_setup_map);
-}
-
-static int additional_cpus __initdata = -1;
-
-static __init int setup_additional_cpus(char *s)
-{
- return s && get_option(&s, &additional_cpus) ? 0 : -EINVAL;
-}
-early_param("additional_cpus", setup_additional_cpus);
-
/*
* cpu_possible_map should be static, it cannot change as cpu's
* are onlined, or offlined. The reason is per-cpu data-structures
@@ -1306,21 +1279,13 @@ early_param("additional_cpus", setup_additional_cpus);
*/
__init void prefill_possible_map(void)
{
- int i;
- int possible;
+ int i, possible;
/* no processor from mptable or madt */
if (!num_processors)
num_processors = 1;
- if (additional_cpus == -1) {
- if (disabled_cpus > 0)
- additional_cpus = disabled_cpus;
- else
- additional_cpus = 0;
- }
-
- possible = num_processors + additional_cpus;
+ possible = num_processors + disabled_cpus;
if (possible > NR_CPUS)
possible = NR_CPUS;
@@ -1333,6 +1298,31 @@ __init void prefill_possible_map(void)
nr_cpu_ids = possible;
}
+#ifdef CONFIG_HOTPLUG_CPU
+
+static void remove_siblinginfo(int cpu)
+{
+ int sibling;
+ struct cpuinfo_x86 *c = &cpu_data(cpu);
+
+ for_each_cpu_mask_nr(sibling, per_cpu(cpu_core_map, cpu)) {
+ cpu_clear(cpu, per_cpu(cpu_core_map, sibling));
+ /*/
+ * last thread sibling in this cpu core going down
+ */
+ if (cpus_weight(per_cpu(cpu_sibling_map, cpu)) == 1)
+ cpu_data(sibling).booted_cores--;
+ }
+
+ for_each_cpu_mask_nr(sibling, per_cpu(cpu_sibling_map, cpu))
+ cpu_clear(cpu, per_cpu(cpu_sibling_map, sibling));
+ cpus_clear(per_cpu(cpu_sibling_map, cpu));
+ cpus_clear(per_cpu(cpu_core_map, cpu));
+ c->phys_proc_id = 0;
+ c->cpu_core_id = 0;
+ cpu_clear(cpu, cpu_sibling_setup_map);
+}
+
static void __ref remove_cpu_from_maps(int cpu)
{
cpu_clear(cpu, cpu_online_map);
@@ -1343,25 +1333,9 @@ static void __ref remove_cpu_from_maps(int cpu)
numa_remove_cpu(cpu);
}
-int __cpu_disable(void)
+void cpu_disable_common(void)
{
int cpu = smp_processor_id();
-
- /*
- * Perhaps use cpufreq to drop frequency, but that could go
- * into generic code.
- *
- * We won't take down the boot processor on i386 due to some
- * interrupts only being able to be serviced by the BSP.
- * Especially so if we're not using an IOAPIC -zwane
- */
- if (cpu == 0)
- return -EBUSY;
-
- if (nmi_watchdog == NMI_LOCAL_APIC)
- stop_apic_nmi_watchdog(NULL);
- clear_local_APIC();
-
/*
* HACK:
* Allow any queued timer interrupts to get serviced
@@ -1379,10 +1353,32 @@ int __cpu_disable(void)
remove_cpu_from_maps(cpu);
unlock_vector_lock();
fixup_irqs(cpu_online_map);
+}
+
+int native_cpu_disable(void)
+{
+ int cpu = smp_processor_id();
+
+ /*
+ * Perhaps use cpufreq to drop frequency, but that could go
+ * into generic code.
+ *
+ * We won't take down the boot processor on i386 due to some
+ * interrupts only being able to be serviced by the BSP.
+ * Especially so if we're not using an IOAPIC -zwane
+ */
+ if (cpu == 0)
+ return -EBUSY;
+
+ if (nmi_watchdog == NMI_LOCAL_APIC)
+ stop_apic_nmi_watchdog(NULL);
+ clear_local_APIC();
+
+ cpu_disable_common();
return 0;
}
-void __cpu_die(unsigned int cpu)
+void native_cpu_die(unsigned int cpu)
{
/* We don't do anything here: idle task is faking death itself. */
unsigned int i;
@@ -1399,15 +1395,45 @@ void __cpu_die(unsigned int cpu)
}
printk(KERN_ERR "CPU %u didn't die...\n", cpu);
}
+
+void play_dead_common(void)
+{
+ idle_task_exit();
+ reset_lazy_tlbstate();
+ irq_ctx_exit(raw_smp_processor_id());
+ c1e_remove_cpu(raw_smp_processor_id());
+
+ mb();
+ /* Ack it */
+ __get_cpu_var(cpu_state) = CPU_DEAD;
+
+ /*
+ * With physical CPU hotplug, we should halt the cpu
+ */
+ local_irq_disable();
+}
+
+void native_play_dead(void)
+{
+ play_dead_common();
+ wbinvd_halt();
+}
+
#else /* ... !CONFIG_HOTPLUG_CPU */
-int __cpu_disable(void)
+int native_cpu_disable(void)
{
return -ENOSYS;
}
-void __cpu_die(unsigned int cpu)
+void native_cpu_die(unsigned int cpu)
{
/* We said "no" in __cpu_disable */
BUG();
}
+
+void native_play_dead(void)
+{
+ BUG();
+}
+
#endif
diff --git a/arch/x86/kernel/tlb_32.c b/arch/x86/kernel/tlb_32.c
index fec1ece..e00534b 100644
--- a/arch/x86/kernel/tlb_32.c
+++ b/arch/x86/kernel/tlb_32.c
@@ -241,3 +241,11 @@ void flush_tlb_all(void)
on_each_cpu(do_flush_tlb_all, NULL, 1);
}
+void reset_lazy_tlbstate(void)
+{
+ int cpu = raw_smp_processor_id();
+
+ per_cpu(cpu_tlbstate, cpu).state = 0;
+ per_cpu(cpu_tlbstate, cpu).active_mm = &init_mm;
+}
+
diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps.c
similarity index 60%
rename from arch/x86/kernel/traps_32.c
rename to arch/x86/kernel/traps.c
index 0429c5d..ffb131f 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps.c
@@ -7,13 +7,11 @@
*/
/*
- * 'Traps.c' handles hardware traps and faults after we have saved some
- * state in 'asm.s'.
+ * Handle hardware traps and faults.
*/
#include <linux/interrupt.h>
#include <linux/kallsyms.h>
#include <linux/spinlock.h>
-#include <linux/highmem.h>
#include <linux/kprobes.h>
#include <linux/uaccess.h>
#include <linux/utsname.h>
@@ -32,6 +30,8 @@
#include <linux/bug.h>
#include <linux/nmi.h>
#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/io.h>
#ifdef CONFIG_EISA
#include <linux/ioport.h>
@@ -46,21 +46,31 @@
#include <linux/edac.h>
#endif
-#include <asm/arch_hooks.h>
#include <asm/stacktrace.h>
#include <asm/processor.h>
#include <asm/debugreg.h>
#include <asm/atomic.h>
#include <asm/system.h>
#include <asm/unwind.h>
+#include <asm/traps.h>
#include <asm/desc.h>
#include <asm/i387.h>
+
+#include <mach_traps.h>
+
+#ifdef CONFIG_X86_64
+#include <asm/pgalloc.h>
+#include <asm/proto.h>
+#include <asm/pda.h>
+#else
+#include <asm/processor-flags.h>
+#include <asm/arch_hooks.h>
#include <asm/nmi.h>
#include <asm/smp.h>
#include <asm/io.h>
#include <asm/traps.h>
-#include "mach_traps.h"
+#include "cpu/mcheck/mce.h"
DECLARE_BITMAP(used_vectors, NR_VECTORS);
EXPORT_SYMBOL_GPL(used_vectors);
@@ -77,418 +87,104 @@ char ignore_fpu_irq;
*/
gate_desc idt_table[256]
__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
-
-int panic_on_unrecovered_nmi;
-int kstack_depth_to_print = 24;
-static unsigned int code_bytes = 64;
-static int ignore_nmis;
-static int die_counter;
-
-void printk_address(unsigned long address, int reliable)
-{
-#ifdef CONFIG_KALLSYMS
- unsigned long offset = 0;
- unsigned long symsize;
- const char *symname;
- char *modname;
- char *delim = ":";
- char namebuf[KSYM_NAME_LEN];
- char reliab[4] = "";
-
- symname = kallsyms_lookup(address, &symsize, &offset,
- &modname, namebuf);
- if (!symname) {
- printk(" [<%08lx>]\n", address);
- return;
- }
- if (!reliable)
- strcpy(reliab, "? ");
-
- if (!modname)
- modname = delim = "";
- printk(" [<%08lx>] %s%s%s%s%s+0x%lx/0x%lx\n",
- address, reliab, delim, modname, delim, symname, offset, symsize);
-#else
- printk(" [<%08lx>]\n", address);
-#endif
-}
-
-static inline int valid_stack_ptr(struct thread_info *tinfo,
- void *p, unsigned int size)
-{
- void *t = tinfo;
- return p > t && p <= t + THREAD_SIZE - size;
-}
-
-/* The form of the top of the frame on the stack */
-struct stack_frame {
- struct stack_frame *next_frame;
- unsigned long return_address;
-};
-
-static inline unsigned long
-print_context_stack(struct thread_info *tinfo,
- unsigned long *stack, unsigned long bp,
- const struct stacktrace_ops *ops, void *data)
-{
- struct stack_frame *frame = (struct stack_frame *)bp;
-
- while (valid_stack_ptr(tinfo, stack, sizeof(*stack))) {
- unsigned long addr;
-
- addr = *stack;
- if (__kernel_text_address(addr)) {
- if ((unsigned long) stack == bp + 4) {
- ops->address(data, addr, 1);
- frame = frame->next_frame;
- bp = (unsigned long) frame;
- } else {
- ops->address(data, addr, bp == 0);
- }
- }
- stack++;
- }
- return bp;
-}
-
-void dump_trace(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp,
- const struct stacktrace_ops *ops, void *data)
-{
- if (!task)
- task = current;
-
- if (!stack) {
- unsigned long dummy;
- stack = &dummy;
- if (task != current)
- stack = (unsigned long *)task->thread.sp;
- }
-
-#ifdef CONFIG_FRAME_POINTER
- if (!bp) {
- if (task == current) {
- /* Grab bp right from our regs */
- asm("movl %%ebp, %0" : "=r" (bp) :);
- } else {
- /* bp is the last reg pushed by switch_to */
- bp = *(unsigned long *) task->thread.sp;
- }
- }
#endif
- for (;;) {
- struct thread_info *context;
-
- context = (struct thread_info *)
- ((unsigned long)stack & (~(THREAD_SIZE - 1)));
- bp = print_context_stack(context, stack, bp, ops, data);
- /*
- * Should be after the line below, but somewhere
- * in early boot context comes out corrupted and we
- * can't reference it:
- */
- if (ops->stack(data, "IRQ") < 0)
- break;
- stack = (unsigned long *)context->previous_esp;
- if (!stack)
- break;
- touch_nmi_watchdog();
- }
-}
-EXPORT_SYMBOL(dump_trace);
-
-static void
-print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
-{
- printk(data);
- print_symbol(msg, symbol);
- printk("\n");
-}
-
-static void print_trace_warning(void *data, char *msg)
-{
- printk("%s%s\n", (char *)data, msg);
-}
-
-static int print_trace_stack(void *data, char *name)
-{
- return 0;
-}
-
-/*
- * Print one address/symbol entries per line.
- */
-static void print_trace_address(void *data, unsigned long addr, int reliable)
-{
- printk("%s [<%08lx>] ", (char *)data, addr);
- if (!reliable)
- printk("? ");
- print_symbol("%s\n", addr);
- touch_nmi_watchdog();
-}
-
-static const struct stacktrace_ops print_trace_ops = {
- .warning = print_trace_warning,
- .warning_symbol = print_trace_warning_symbol,
- .stack = print_trace_stack,
- .address = print_trace_address,
-};
+static int ignore_nmis;
-static void
-show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp, char *log_lvl)
+static inline void conditional_sti(struct pt_regs *regs)
{
- dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
- printk("%s =======================\n", log_lvl);
+ if (regs->flags & X86_EFLAGS_IF)
+ local_irq_enable();
}
-void show_trace(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp)
+static inline void preempt_conditional_sti(struct pt_regs *regs)
{
- show_trace_log_lvl(task, regs, stack, bp, "");
+ inc_preempt_count();
+ if (regs->flags & X86_EFLAGS_IF)
+ local_irq_enable();
}
-static void
-show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *sp, unsigned long bp, char *log_lvl)
+static inline void preempt_conditional_cli(struct pt_regs *regs)
{
- unsigned long *stack;
- int i;
-
- if (sp == NULL) {
- if (task)
- sp = (unsigned long *)task->thread.sp;
- else
- sp = (unsigned long *)&sp;
- }
-
- stack = sp;
- for (i = 0; i < kstack_depth_to_print; i++) {
- if (kstack_end(stack))
- break;
- if (i && ((i % 8) == 0))
- printk("\n%s ", log_lvl);
- printk("%08lx ", *stack++);
- }
- printk("\n%sCall Trace:\n", log_lvl);
-
- show_trace_log_lvl(task, regs, sp, bp, log_lvl);
+ if (regs->flags & X86_EFLAGS_IF)
+ local_irq_disable();
+ dec_preempt_count();
}
-void show_stack(struct task_struct *task, unsigned long *sp)
+#ifdef CONFIG_X86_32
+static inline void
+die_if_kernel(const char *str, struct pt_regs *regs, long err)
{
- printk(" ");
- show_stack_log_lvl(task, NULL, sp, 0, "");
+ if (!user_mode_vm(regs))
+ die(str, regs, err);
}
/*
- * The architecture-independent dump_stack generator
+ * Perform the lazy TSS's I/O bitmap copy. If the TSS has an
+ * invalid offset set (the LAZY one) and the faulting thread has
+ * a valid I/O bitmap pointer, we copy the I/O bitmap in the TSS,
+ * we set the offset field correctly and return 1.
*/
-void dump_stack(void)
+static int lazy_iobitmap_copy(void)
{
- unsigned long bp = 0;
- unsigned long stack;
-
-#ifdef CONFIG_FRAME_POINTER
- if (!bp)
- asm("movl %%ebp, %0" : "=r" (bp):);
-#endif
-
- printk("Pid: %d, comm: %.20s %s %s %.*s\n",
- current->pid, current->comm, print_tainted(),
- init_utsname()->release,
- (int)strcspn(init_utsname()->version, " "),
- init_utsname()->version);
-
- show_trace(current, NULL, &stack, bp);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
-void show_registers(struct pt_regs *regs)
-{
- int i;
-
- print_modules();
- __show_registers(regs, 0);
-
- printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
- TASK_COMM_LEN, current->comm, task_pid_nr(current),
- current_thread_info(), current, task_thread_info(current));
- /*
- * When in-kernel, we also print out the stack and code at the
- * time of the fault..
- */
- if (!user_mode_vm(regs)) {
- unsigned int code_prologue = code_bytes * 43 / 64;
- unsigned int code_len = code_bytes;
- unsigned char c;
- u8 *ip;
-
- printk("\n" KERN_EMERG "Stack: ");
- show_stack_log_lvl(NULL, regs, ®s->sp, 0, KERN_EMERG);
+ struct thread_struct *thread;
+ struct tss_struct *tss;
+ int cpu;
- printk(KERN_EMERG "Code: ");
+ cpu = get_cpu();
+ tss = &per_cpu(init_tss, cpu);
+ thread = ¤t->thread;
- ip = (u8 *)regs->ip - code_prologue;
- if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
- /* try starting at EIP */
- ip = (u8 *)regs->ip;
- code_len = code_len - code_prologue + 1;
- }
- for (i = 0; i < code_len; i++, ip++) {
- if (ip < (u8 *)PAGE_OFFSET ||
- probe_kernel_address(ip, c)) {
- printk(" Bad EIP value.");
- break;
- }
- if (ip == (u8 *)regs->ip)
- printk("<%02x> ", c);
- else
- printk("%02x ", c);
+ if (tss->x86_tss.io_bitmap_base == INVALID_IO_BITMAP_OFFSET_LAZY &&
+ thread->io_bitmap_ptr) {
+ memcpy(tss->io_bitmap, thread->io_bitmap_ptr,
+ thread->io_bitmap_max);
+ /*
+ * If the previously set map was extending to higher ports
+ * than the current one, pad extra space with 0xff (no access).
+ */
+ if (thread->io_bitmap_max < tss->io_bitmap_max) {
+ memset((char *) tss->io_bitmap +
+ thread->io_bitmap_max, 0xff,
+ tss->io_bitmap_max - thread->io_bitmap_max);
}
- }
- printk("\n");
-}
-
-int is_valid_bugaddr(unsigned long ip)
-{
- unsigned short ud2;
-
- if (ip < PAGE_OFFSET)
- return 0;
- if (probe_kernel_address((unsigned short *)ip, ud2))
- return 0;
-
- return ud2 == 0x0b0f;
-}
-
-static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
-static int die_owner = -1;
-static unsigned int die_nest_count;
-
-unsigned __kprobes long oops_begin(void)
-{
- unsigned long flags;
-
- oops_enter();
-
- if (die_owner != raw_smp_processor_id()) {
- console_verbose();
- raw_local_irq_save(flags);
- __raw_spin_lock(&die_lock);
- die_owner = smp_processor_id();
- die_nest_count = 0;
- bust_spinlocks(1);
- } else {
- raw_local_irq_save(flags);
- }
- die_nest_count++;
- return flags;
-}
-
-void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
-{
- bust_spinlocks(0);
- die_owner = -1;
- add_taint(TAINT_DIE);
- __raw_spin_unlock(&die_lock);
- raw_local_irq_restore(flags);
-
- if (!regs)
- return;
-
- if (kexec_should_crash(current))
- crash_kexec(regs);
-
- if (in_interrupt())
- panic("Fatal exception in interrupt");
-
- if (panic_on_oops)
- panic("Fatal exception");
-
- oops_exit();
- do_exit(signr);
-}
-
-int __kprobes __die(const char *str, struct pt_regs *regs, long err)
-{
- unsigned short ss;
- unsigned long sp;
+ tss->io_bitmap_max = thread->io_bitmap_max;
+ tss->x86_tss.io_bitmap_base = IO_BITMAP_OFFSET;
+ tss->io_bitmap_owner = thread;
+ put_cpu();
- printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter);
-#ifdef CONFIG_PREEMPT
- printk("PREEMPT ");
-#endif
-#ifdef CONFIG_SMP
- printk("SMP ");
-#endif
-#ifdef CONFIG_DEBUG_PAGEALLOC
- printk("DEBUG_PAGEALLOC");
-#endif
- printk("\n");
- if (notify_die(DIE_OOPS, str, regs, err,
- current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
return 1;
-
- show_registers(regs);
- /* Executive summary in case the oops scrolled away */
- sp = (unsigned long) (®s->sp);
- savesegment(ss, ss);
- if (user_mode(regs)) {
- sp = regs->sp;
- ss = regs->ss & 0xffff;
}
- printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip);
- print_symbol("%s", regs->ip);
- printk(" SS:ESP %04x:%08lx\n", ss, sp);
- return 0;
-}
-
-/*
- * This is gone through when something in the kernel has done something bad
- * and is about to be terminated:
- */
-void die(const char *str, struct pt_regs *regs, long err)
-{
- unsigned long flags = oops_begin();
-
- if (die_nest_count < 3) {
- report_bug(regs->ip, regs);
-
- if (__die(str, regs, err))
- regs = NULL;
- } else {
- printk(KERN_EMERG "Recursive die() failure, output suppressed\n");
- }
-
- oops_end(flags, regs, SIGSEGV);
-}
+ put_cpu();
-static inline void
-die_if_kernel(const char *str, struct pt_regs *regs, long err)
-{
- if (!user_mode_vm(regs))
- die(str, regs, err);
+ return 0;
}
+#endif
static void __kprobes
-do_trap(int trapnr, int signr, char *str, int vm86, struct pt_regs *regs,
+do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
long error_code, siginfo_t *info)
{
struct task_struct *tsk = current;
+#ifdef CONFIG_X86_32
if (regs->flags & X86_VM_MASK) {
- if (vm86)
+ /*
+ * traps 0, 1, 3, 4, and 5 should be forwarded to vm86.
+ * On nmi (interrupt 2), do_trap should not be called.
+ */
+ if (trapnr < 6)
goto vm86_trap;
goto trap_signal;
}
+#endif
if (!user_mode(regs))
goto kernel_trap;
+#ifdef CONFIG_X86_32
trap_signal:
+#endif
/*
* We want error_code and trap_no set for userspace faults and
* kernelspace faults which result in die(), but not
@@ -501,6 +197,18 @@ trap_signal:
tsk->thread.error_code = error_code;
tsk->thread.trap_no = trapnr;
+#ifdef CONFIG_X86_64
+ if (show_unhandled_signals && unhandled_signal(tsk, signr) &&
+ printk_ratelimit()) {
+ printk(KERN_INFO
+ "%s[%d] trap %s ip:%lx sp:%lx error:%lx",
+ tsk->comm, tsk->pid, str,
+ regs->ip, regs->sp, error_code);
+ print_vma_addr(" in ", regs->ip);
+ printk("\n");
+ }
+#endif
+
if (info)
force_sig_info(signr, info, tsk);
else
@@ -515,120 +223,98 @@ kernel_trap:
}
return;
+#ifdef CONFIG_X86_32
vm86_trap:
if (handle_vm86_trap((struct kernel_vm86_regs *) regs,
error_code, trapnr))
goto trap_signal;
return;
+#endif
}
#define DO_ERROR(trapnr, signr, str, name) \
-void do_##name(struct pt_regs *regs, long error_code) \
-{ \
- trace_hardirqs_fixup(); \
- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
- == NOTIFY_STOP) \
- return; \
- do_trap(trapnr, signr, str, 0, regs, error_code, NULL); \
-}
-
-#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr, irq) \
-void do_##name(struct pt_regs *regs, long error_code) \
-{ \
- siginfo_t info; \
- if (irq) \
- local_irq_enable(); \
- info.si_signo = signr; \
- info.si_errno = 0; \
- info.si_code = sicode; \
- info.si_addr = (void __user *)siaddr; \
- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
- == NOTIFY_STOP) \
- return; \
- do_trap(trapnr, signr, str, 0, regs, error_code, &info); \
-}
-
-#define DO_VM86_ERROR(trapnr, signr, str, name) \
-void do_##name(struct pt_regs *regs, long error_code) \
+dotraplinkage void do_##name(struct pt_regs *regs, long error_code) \
{ \
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
== NOTIFY_STOP) \
return; \
- do_trap(trapnr, signr, str, 1, regs, error_code, NULL); \
+ conditional_sti(regs); \
+ do_trap(trapnr, signr, str, regs, error_code, NULL); \
}
-#define DO_VM86_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
-void do_##name(struct pt_regs *regs, long error_code) \
+#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
+dotraplinkage void do_##name(struct pt_regs *regs, long error_code) \
{ \
siginfo_t info; \
info.si_signo = signr; \
info.si_errno = 0; \
info.si_code = sicode; \
info.si_addr = (void __user *)siaddr; \
- trace_hardirqs_fixup(); \
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
== NOTIFY_STOP) \
return; \
- do_trap(trapnr, signr, str, 1, regs, error_code, &info); \
+ conditional_sti(regs); \
+ do_trap(trapnr, signr, str, regs, error_code, &info); \
}
-DO_VM86_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
-#ifndef CONFIG_KPROBES
-DO_VM86_ERROR(3, SIGTRAP, "int3", int3)
-#endif
-DO_VM86_ERROR(4, SIGSEGV, "overflow", overflow)
-DO_VM86_ERROR(5, SIGSEGV, "bounds", bounds)
-DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip, 0)
+DO_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
+DO_ERROR(4, SIGSEGV, "overflow", overflow)
+DO_ERROR(5, SIGSEGV, "bounds", bounds)
+DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip)
DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
+#ifdef CONFIG_X86_32
DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
-DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0, 0)
-DO_ERROR_INFO(32, SIGILL, "iret exception", iret_error, ILL_BADSTK, 0, 1)
+#endif
+DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
+
+#ifdef CONFIG_X86_64
+/* Runs on IST stack */
+dotraplinkage void do_stack_segment(struct pt_regs *regs, long error_code)
+{
+ if (notify_die(DIE_TRAP, "stack segment", regs, error_code,
+ 12, SIGBUS) == NOTIFY_STOP)
+ return;
+ preempt_conditional_sti(regs);
+ do_trap(12, SIGBUS, "stack segment", regs, error_code, NULL);
+ preempt_conditional_cli(regs);
+}
-void __kprobes
+dotraplinkage void do_double_fault(struct pt_regs *regs, long error_code)
+{
+ static const char str[] = "double fault";
+ struct task_struct *tsk = current;
+
+ /* Return not checked because double check cannot be ignored */
+ notify_die(DIE_TRAP, str, regs, error_code, 8, SIGSEGV);
+
+ tsk->thread.error_code = error_code;
+ tsk->thread.trap_no = 8;
+
+ /* This is always a kernel trap and never fixable (and thus must
+ never return). */
+ for (;;)
+ die(str, regs, error_code);
+}
+#endif
+
+dotraplinkage void __kprobes
do_general_protection(struct pt_regs *regs, long error_code)
{
struct task_struct *tsk;
- struct thread_struct *thread;
- struct tss_struct *tss;
- int cpu;
- cpu = get_cpu();
- tss = &per_cpu(init_tss, cpu);
- thread = ¤t->thread;
-
- /*
- * Perform the lazy TSS's I/O bitmap copy. If the TSS has an
- * invalid offset set (the LAZY one) and the faulting thread has
- * a valid I/O bitmap pointer, we copy the I/O bitmap in the TSS
- * and we set the offset field correctly. Then we let the CPU to
- * restart the faulting instruction.
- */
- if (tss->x86_tss.io_bitmap_base == INVALID_IO_BITMAP_OFFSET_LAZY &&
- thread->io_bitmap_ptr) {
- memcpy(tss->io_bitmap, thread->io_bitmap_ptr,
- thread->io_bitmap_max);
- /*
- * If the previously set map was extending to higher ports
- * than the current one, pad extra space with 0xff (no access).
- */
- if (thread->io_bitmap_max < tss->io_bitmap_max) {
- memset((char *) tss->io_bitmap +
- thread->io_bitmap_max, 0xff,
- tss->io_bitmap_max - thread->io_bitmap_max);
- }
- tss->io_bitmap_max = thread->io_bitmap_max;
- tss->x86_tss.io_bitmap_base = IO_BITMAP_OFFSET;
- tss->io_bitmap_owner = thread;
- put_cpu();
+ conditional_sti(regs);
+#ifdef CONFIG_X86_32
+ if (lazy_iobitmap_copy()) {
+ /* restart the faulting instruction */
return;
}
- put_cpu();
if (regs->flags & X86_VM_MASK)
goto gp_in_vm86;
+#endif
tsk = current;
if (!user_mode(regs))
@@ -650,10 +336,12 @@ do_general_protection(struct pt_regs *regs, long error_code)
force_sig(SIGSEGV, tsk);
return;
+#ifdef CONFIG_X86_32
gp_in_vm86:
local_irq_enable();
handle_vm86_fault((struct kernel_vm86_regs *) regs, error_code);
return;
+#endif
gp_in_kernel:
if (fixup_exception(regs))
@@ -690,7 +378,8 @@ mem_parity_error(unsigned char reason, struct pt_regs *regs)
printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
/* Clear and disable the memory parity error line. */
- clear_mem_error(reason);
+ reason = (reason & 0xf) | 4;
+ outb(reason, 0x61);
}
static notrace __kprobes void
@@ -716,7 +405,8 @@ io_check_error(unsigned char reason, struct pt_regs *regs)
static notrace __kprobes void
unknown_nmi_error(unsigned char reason, struct pt_regs *regs)
{
- if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
+ if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) ==
+ NOTIFY_STOP)
return;
#ifdef CONFIG_MCA
/*
@@ -739,6 +429,7 @@ unknown_nmi_error(unsigned char reason, struct pt_regs *regs)
printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
}
+#ifdef CONFIG_X86_32
static DEFINE_SPINLOCK(nmi_print_lock);
void notrace __kprobes die_nmi(char *str, struct pt_regs *regs, int do_panic)
@@ -773,6 +464,7 @@ void notrace __kprobes die_nmi(char *str, struct pt_regs *regs, int do_panic)
do_exit(SIGSEGV);
}
+#endif
static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
{
@@ -812,22 +504,25 @@ static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
mem_parity_error(reason, regs);
if (reason & 0x40)
io_check_error(reason, regs);
+#ifdef CONFIG_X86_32
/*
* Reassert NMI in case it became active meanwhile
* as it's edge-triggered:
*/
reassert_nmi();
+#endif
}
-notrace __kprobes void do_nmi(struct pt_regs *regs, long error_code)
+dotraplinkage notrace __kprobes void
+do_nmi(struct pt_regs *regs, long error_code)
{
- int cpu;
-
nmi_enter();
- cpu = smp_processor_id();
-
- ++nmi_count(cpu);
+#ifdef CONFIG_X86_32
+ { int cpu; cpu = smp_processor_id(); ++nmi_count(cpu); }
+#else
+ add_pda(__nmi_count, 1);
+#endif
if (!ignore_nmis)
default_do_nmi(regs);
@@ -847,21 +542,44 @@ void restart_nmi(void)
acpi_nmi_enable();
}
-#ifdef CONFIG_KPROBES
-void __kprobes do_int3(struct pt_regs *regs, long error_code)
+/* May run on IST stack. */
+dotraplinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
{
- trace_hardirqs_fixup();
-
+#ifdef CONFIG_KPROBES
if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
== NOTIFY_STOP)
return;
- /*
- * This is an interrupt gate, because kprobes wants interrupts
- * disabled. Normal trap handlers don't.
- */
- restore_interrupts(regs);
+#else
+ if (notify_die(DIE_TRAP, "int3", regs, error_code, 3, SIGTRAP)
+ == NOTIFY_STOP)
+ return;
+#endif
+
+ preempt_conditional_sti(regs);
+ do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);
+ preempt_conditional_cli(regs);
+}
- do_trap(3, SIGTRAP, "int3", 1, regs, error_code, NULL);
+#ifdef CONFIG_X86_64
+/* Help handler running on IST stack to switch back to user stack
+ for scheduling or signal handling. The actual stack switch is done in
+ entry.S */
+asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *eregs)
+{
+ struct pt_regs *regs = eregs;
+ /* Did already sync */
+ if (eregs == (struct pt_regs *)eregs->sp)
+ ;
+ /* Exception from user space */
+ else if (user_mode(eregs))
+ regs = task_pt_regs(current);
+ /* Exception from kernel and interrupts are enabled. Move to
+ kernel process stack. */
+ else if (eregs->flags & X86_EFLAGS_IF)
+ regs = (struct pt_regs *)(eregs->sp -= sizeof(struct pt_regs));
+ if (eregs != regs)
+ *regs = *eregs;
+ return regs;
}
#endif
@@ -886,15 +604,15 @@ void __kprobes do_int3(struct pt_regs *regs, long error_code)
* about restoring all the debug state, and ptrace doesn't have to
* find every occurrence of the TF bit that could be saved away even
* by user code)
+ *
+ * May run on IST stack.
*/
-void __kprobes do_debug(struct pt_regs *regs, long error_code)
+dotraplinkage void __kprobes do_debug(struct pt_regs *regs, long error_code)
{
struct task_struct *tsk = current;
- unsigned int condition;
+ unsigned long condition;
int si_code;
- trace_hardirqs_fixup();
-
get_debugreg(condition, 6);
/*
@@ -906,9 +624,9 @@ void __kprobes do_debug(struct pt_regs *regs, long error_code)
if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
SIGTRAP) == NOTIFY_STOP)
return;
+
/* It's safe to allow irq's after DR6 has been saved */
- if (regs->flags & X86_EFLAGS_IF)
- local_irq_enable();
+ preempt_conditional_sti(regs);
/* Mask out spurious debug traps due to lazy DR7 setting */
if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
@@ -916,8 +634,10 @@ void __kprobes do_debug(struct pt_regs *regs, long error_code)
goto clear_dr7;
}
+#ifdef CONFIG_X86_32
if (regs->flags & X86_VM_MASK)
goto debug_vm86;
+#endif
/* Save debug status register where ptrace can see it */
tsk->thread.debugreg6 = condition;
@@ -927,16 +647,11 @@ void __kprobes do_debug(struct pt_regs *regs, long error_code)
* kernel space (but re-enable TF when returning to user mode).
*/
if (condition & DR_STEP) {
- /*
- * We already checked v86 mode above, so we can
- * check for kernel mode by just checking the CPL
- * of CS.
- */
if (!user_mode(regs))
goto clear_TF_reenable;
}
- si_code = get_si_code((unsigned long)condition);
+ si_code = get_si_code(condition);
/* Ok, finally something we can handle */
send_sigtrap(tsk, regs, error_code, si_code);
@@ -946,18 +661,37 @@ void __kprobes do_debug(struct pt_regs *regs, long error_code)
*/
clear_dr7:
set_debugreg(0, 7);
+ preempt_conditional_cli(regs);
return;
+#ifdef CONFIG_X86_32
debug_vm86:
handle_vm86_trap((struct kernel_vm86_regs *) regs, error_code, 1);
+ preempt_conditional_cli(regs);
return;
+#endif
clear_TF_reenable:
set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
regs->flags &= ~X86_EFLAGS_TF;
+ preempt_conditional_cli(regs);
return;
}
+#ifdef CONFIG_X86_64
+static int kernel_math_error(struct pt_regs *regs, const char *str, int trapnr)
+{
+ if (fixup_exception(regs))
+ return 1;
+
+ notify_die(DIE_GPF, str, regs, 0, trapnr, SIGFPE);
+ /* Illegal floating point operation in the kernel */
+ current->thread.trap_no = trapnr;
+ die(str, regs, 0);
+ return 0;
+}
+#endif
+
/*
* Note that we play around with the 'TS' bit in an attempt to get
* the correct behaviour even in the presence of the asynchronous
@@ -994,7 +728,9 @@ void math_error(void __user *ip)
swd = get_fpu_swd(task);
switch (swd & ~cwd & 0x3f) {
case 0x000: /* No unmasked exception */
+#ifdef CONFIG_X86_32
return;
+#endif
default: /* Multiple exceptions */
break;
case 0x001: /* Invalid Op */
@@ -1022,9 +758,18 @@ void math_error(void __user *ip)
force_sig_info(SIGFPE, &info, task);
}
-void do_coprocessor_error(struct pt_regs *regs, long error_code)
+dotraplinkage void do_coprocessor_error(struct pt_regs *regs, long error_code)
{
+ conditional_sti(regs);
+
+#ifdef CONFIG_X86_32
ignore_fpu_irq = 1;
+#else
+ if (!user_mode(regs) &&
+ kernel_math_error(regs, "kernel x87 math error", 16))
+ return;
+#endif
+
math_error((void __user *)regs->ip);
}
@@ -1076,8 +821,12 @@ static void simd_math_error(void __user *ip)
force_sig_info(SIGFPE, &info, task);
}
-void do_simd_coprocessor_error(struct pt_regs *regs, long error_code)
+dotraplinkage void
+do_simd_coprocessor_error(struct pt_regs *regs, long error_code)
{
+ conditional_sti(regs);
+
+#ifdef CONFIG_X86_32
if (cpu_has_xmm) {
/* Handle SIMD FPU exceptions on PIII+ processors. */
ignore_fpu_irq = 1;
@@ -1096,16 +845,25 @@ void do_simd_coprocessor_error(struct pt_regs *regs, long error_code)
current->thread.error_code = error_code;
die_if_kernel("cache flush denied", regs, error_code);
force_sig(SIGSEGV, current);
+#else
+ if (!user_mode(regs) &&
+ kernel_math_error(regs, "kernel simd math error", 19))
+ return;
+ simd_math_error((void __user *)regs->ip);
+#endif
}
-void do_spurious_interrupt_bug(struct pt_regs *regs, long error_code)
+dotraplinkage void
+do_spurious_interrupt_bug(struct pt_regs *regs, long error_code)
{
+ conditional_sti(regs);
#if 0
/* No need to warn about this any longer. */
printk(KERN_INFO "Ignoring P6 Local APIC Spurious Interrupt Bug...\n");
#endif
}
+#ifdef CONFIG_X86_32
unsigned long patch_espfix_desc(unsigned long uesp, unsigned long kesp)
{
struct desc_struct *gdt = get_cpu_gdt_table(smp_processor_id());
@@ -1124,6 +882,15 @@ unsigned long patch_espfix_desc(unsigned long uesp, unsigned long kesp)
return new_kesp;
}
+#else
+asmlinkage void __attribute__((weak)) smp_thermal_interrupt(void)
+{
+}
+
+asmlinkage void __attribute__((weak)) mce_threshold_interrupt(void)
+{
+}
+#endif
/*
* 'math_state_restore()' saves the current math information in the
@@ -1156,14 +923,24 @@ asmlinkage void math_state_restore(void)
}
clts(); /* Allow maths ops (or we recurse) */
+#ifdef CONFIG_X86_32
restore_fpu(tsk);
+#else
+ /*
+ * Paranoid restore. send a SIGSEGV if we fail to restore the state.
+ */
+ if (unlikely(restore_fpu_checking(tsk))) {
+ stts();
+ force_sig(SIGSEGV, tsk);
+ return;
+ }
+#endif
thread->status |= TS_USEDFPU; /* So we fnsave on switch_to() */
tsk->fpu_counter++;
}
EXPORT_SYMBOL_GPL(math_state_restore);
#ifndef CONFIG_MATH_EMULATION
-
asmlinkage void math_emulate(long arg)
{
printk(KERN_EMERG
@@ -1172,12 +949,54 @@ asmlinkage void math_emulate(long arg)
force_sig(SIGFPE, current);
schedule();
}
-
#endif /* CONFIG_MATH_EMULATION */
+dotraplinkage void __kprobes
+do_device_not_available(struct pt_regs *regs, long error)
+{
+#ifdef CONFIG_X86_32
+ if (read_cr0() & X86_CR0_EM) {
+ conditional_sti(regs);
+ math_emulate(0);
+ } else {
+ math_state_restore(); /* interrupts still off */
+ conditional_sti(regs);
+ }
+#else
+ math_state_restore();
+#endif
+}
+
+#ifdef CONFIG_X86_32
+#ifdef CONFIG_X86_MCE
+dotraplinkage void __kprobes do_machine_check(struct pt_regs *regs, long error)
+{
+ conditional_sti(regs);
+ machine_check_vector(regs, error);
+}
+#endif
+
+dotraplinkage void do_iret_error(struct pt_regs *regs, long error_code)
+{
+ siginfo_t info;
+ local_irq_enable();
+
+ info.si_signo = SIGILL;
+ info.si_errno = 0;
+ info.si_code = ILL_BADSTK;
+ info.si_addr = 0;
+ if (notify_die(DIE_TRAP, "iret exception",
+ regs, error_code, 32, SIGILL) == NOTIFY_STOP)
+ return;
+ do_trap(32, SIGILL, "iret exception", regs, error_code, &info);
+}
+#endif
+
void __init trap_init(void)
{
+#ifdef CONFIG_X86_32
int i;
+#endif
#ifdef CONFIG_EISA
void __iomem *p = early_ioremap(0x0FFFD9, 4);
@@ -1187,29 +1006,40 @@ void __init trap_init(void)
early_iounmap(p, 4);
#endif
- set_trap_gate(0, ÷_error);
- set_intr_gate(1, &debug);
- set_intr_gate(2, &nmi);
- set_system_intr_gate(3, &int3); /* int3 can be called from all */
- set_system_gate(4, &overflow); /* int4 can be called from all */
- set_trap_gate(5, &bounds);
- set_trap_gate(6, &invalid_op);
- set_trap_gate(7, &device_not_available);
+ set_intr_gate(0, ÷_error);
+ set_intr_gate_ist(1, &debug, DEBUG_STACK);
+ set_intr_gate_ist(2, &nmi, NMI_STACK);
+ /* int3 can be called from all */
+ set_system_intr_gate_ist(3, &int3, DEBUG_STACK);
+ /* int4 can be called from all */
+ set_system_intr_gate(4, &overflow);
+ set_intr_gate(5, &bounds);
+ set_intr_gate(6, &invalid_op);
+ set_intr_gate(7, &device_not_available);
+#ifdef CONFIG_X86_32
set_task_gate(8, GDT_ENTRY_DOUBLEFAULT_TSS);
- set_trap_gate(9, &coprocessor_segment_overrun);
- set_trap_gate(10, &invalid_TSS);
- set_trap_gate(11, &segment_not_present);
- set_trap_gate(12, &stack_segment);
- set_trap_gate(13, &general_protection);
+#else
+ set_intr_gate_ist(8, &double_fault, DOUBLEFAULT_STACK);
+#endif
+ set_intr_gate(9, &coprocessor_segment_overrun);
+ set_intr_gate(10, &invalid_TSS);
+ set_intr_gate(11, &segment_not_present);
+ set_intr_gate_ist(12, &stack_segment, STACKFAULT_STACK);
+ set_intr_gate(13, &general_protection);
set_intr_gate(14, &page_fault);
- set_trap_gate(15, &spurious_interrupt_bug);
- set_trap_gate(16, &coprocessor_error);
- set_trap_gate(17, &alignment_check);
+ set_intr_gate(15, &spurious_interrupt_bug);
+ set_intr_gate(16, &coprocessor_error);
+ set_intr_gate(17, &alignment_check);
#ifdef CONFIG_X86_MCE
- set_trap_gate(18, &machine_check);
+ set_intr_gate_ist(18, &machine_check, MCE_STACK);
#endif
- set_trap_gate(19, &simd_coprocessor_error);
+ set_intr_gate(19, &simd_coprocessor_error);
+#ifdef CONFIG_IA32_EMULATION
+ set_system_intr_gate(IA32_SYSCALL_VECTOR, ia32_syscall);
+#endif
+
+#ifdef CONFIG_X86_32
if (cpu_has_fxsr) {
printk(KERN_INFO "Enabling fast FPU save and restore... ");
set_in_cr4(X86_CR4_OSFXSR);
@@ -1222,36 +1052,20 @@ void __init trap_init(void)
printk("done.\n");
}
- set_system_gate(SYSCALL_VECTOR, &system_call);
+ set_system_trap_gate(SYSCALL_VECTOR, &system_call);
/* Reserve all the builtin and the syscall vector: */
for (i = 0; i < FIRST_EXTERNAL_VECTOR; i++)
set_bit(i, used_vectors);
set_bit(SYSCALL_VECTOR, used_vectors);
-
+#endif
/*
* Should be a barrier for any external CPU state:
*/
cpu_init();
+#ifdef CONFIG_X86_32
trap_init_hook();
+#endif
}
-
-static int __init kstack_setup(char *s)
-{
- kstack_depth_to_print = simple_strtoul(s, NULL, 0);
-
- return 1;
-}
-__setup("kstack=", kstack_setup);
-
-static int __init code_bytes_setup(char *s)
-{
- code_bytes = simple_strtoul(s, NULL, 0);
- if (code_bytes > 8192)
- code_bytes = 8192;
-
- return 1;
-}
-__setup("code_bytes=", code_bytes_setup);
diff --git a/arch/x86/kernel/traps_64.c b/arch/x86/kernel/traps_64.c
deleted file mode 100644
index 9c0ac0c..0000000
--- a/arch/x86/kernel/traps_64.c
+++ /dev/null
@@ -1,1214 +0,0 @@
-/*
- * Copyright (C) 1991, 1992 Linus Torvalds
- * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
- *
- * Pentium III FXSR, SSE support
- * Gareth Hughes <gareth@valinux.com>, May 2000
- */
-
-/*
- * 'Traps.c' handles hardware traps and faults after we have saved some
- * state in 'entry.S'.
- */
-#include <linux/moduleparam.h>
-#include <linux/interrupt.h>
-#include <linux/kallsyms.h>
-#include <linux/spinlock.h>
-#include <linux/kprobes.h>
-#include <linux/uaccess.h>
-#include <linux/utsname.h>
-#include <linux/kdebug.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/ptrace.h>
-#include <linux/string.h>
-#include <linux/unwind.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/kexec.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/init.h>
-#include <linux/bug.h>
-#include <linux/nmi.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/io.h>
-
-#if defined(CONFIG_EDAC)
-#include <linux/edac.h>
-#endif
-
-#include <asm/stacktrace.h>
-#include <asm/processor.h>
-#include <asm/debugreg.h>
-#include <asm/atomic.h>
-#include <asm/system.h>
-#include <asm/unwind.h>
-#include <asm/desc.h>
-#include <asm/i387.h>
-#include <asm/pgalloc.h>
-#include <asm/proto.h>
-#include <asm/pda.h>
-#include <asm/traps.h>
-
-#include <mach_traps.h>
-
-int panic_on_unrecovered_nmi;
-int kstack_depth_to_print = 12;
-static unsigned int code_bytes = 64;
-static int ignore_nmis;
-static int die_counter;
-
-static inline void conditional_sti(struct pt_regs *regs)
-{
- if (regs->flags & X86_EFLAGS_IF)
- local_irq_enable();
-}
-
-static inline void preempt_conditional_sti(struct pt_regs *regs)
-{
- inc_preempt_count();
- if (regs->flags & X86_EFLAGS_IF)
- local_irq_enable();
-}
-
-static inline void preempt_conditional_cli(struct pt_regs *regs)
-{
- if (regs->flags & X86_EFLAGS_IF)
- local_irq_disable();
- /* Make sure to not schedule here because we could be running
- on an exception stack. */
- dec_preempt_count();
-}
-
-void printk_address(unsigned long address, int reliable)
-{
- printk(" [<%016lx>] %s%pS\n",
- address, reliable ? "" : "? ", (void *) address);
-}
-
-static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
- unsigned *usedp, char **idp)
-{
- static char ids[][8] = {
- [DEBUG_STACK - 1] = "#DB",
- [NMI_STACK - 1] = "NMI",
- [DOUBLEFAULT_STACK - 1] = "#DF",
- [STACKFAULT_STACK - 1] = "#SS",
- [MCE_STACK - 1] = "#MC",
-#if DEBUG_STKSZ > EXCEPTION_STKSZ
- [N_EXCEPTION_STACKS ...
- N_EXCEPTION_STACKS + DEBUG_STKSZ / EXCEPTION_STKSZ - 2] = "#DB[?]"
-#endif
- };
- unsigned k;
-
- /*
- * Iterate over all exception stacks, and figure out whether
- * 'stack' is in one of them:
- */
- for (k = 0; k < N_EXCEPTION_STACKS; k++) {
- unsigned long end = per_cpu(orig_ist, cpu).ist[k];
- /*
- * Is 'stack' above this exception frame's end?
- * If yes then skip to the next frame.
- */
- if (stack >= end)
- continue;
- /*
- * Is 'stack' above this exception frame's start address?
- * If yes then we found the right frame.
- */
- if (stack >= end - EXCEPTION_STKSZ) {
- /*
- * Make sure we only iterate through an exception
- * stack once. If it comes up for the second time
- * then there's something wrong going on - just
- * break out and return NULL:
- */
- if (*usedp & (1U << k))
- break;
- *usedp |= 1U << k;
- *idp = ids[k];
- return (unsigned long *)end;
- }
- /*
- * If this is a debug stack, and if it has a larger size than
- * the usual exception stacks, then 'stack' might still
- * be within the lower portion of the debug stack:
- */
-#if DEBUG_STKSZ > EXCEPTION_STKSZ
- if (k == DEBUG_STACK - 1 && stack >= end - DEBUG_STKSZ) {
- unsigned j = N_EXCEPTION_STACKS - 1;
-
- /*
- * Black magic. A large debug stack is composed of
- * multiple exception stack entries, which we
- * iterate through now. Dont look:
- */
- do {
- ++j;
- end -= EXCEPTION_STKSZ;
- ids[j][4] = '1' + (j - N_EXCEPTION_STACKS);
- } while (stack < end - EXCEPTION_STKSZ);
- if (*usedp & (1U << j))
- break;
- *usedp |= 1U << j;
- *idp = ids[j];
- return (unsigned long *)end;
- }
-#endif
- }
- return NULL;
-}
-
-/*
- * x86-64 can have up to three kernel stacks:
- * process stack
- * interrupt stack
- * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
- */
-
-static inline int valid_stack_ptr(struct thread_info *tinfo,
- void *p, unsigned int size, void *end)
-{
- void *t = tinfo;
- if (end) {
- if (p < end && p >= (end-THREAD_SIZE))
- return 1;
- else
- return 0;
- }
- return p > t && p < t + THREAD_SIZE - size;
-}
-
-/* The form of the top of the frame on the stack */
-struct stack_frame {
- struct stack_frame *next_frame;
- unsigned long return_address;
-};
-
-static inline unsigned long
-print_context_stack(struct thread_info *tinfo,
- unsigned long *stack, unsigned long bp,
- const struct stacktrace_ops *ops, void *data,
- unsigned long *end)
-{
- struct stack_frame *frame = (struct stack_frame *)bp;
-
- while (valid_stack_ptr(tinfo, stack, sizeof(*stack), end)) {
- unsigned long addr;
-
- addr = *stack;
- if (__kernel_text_address(addr)) {
- if ((unsigned long) stack == bp + 8) {
- ops->address(data, addr, 1);
- frame = frame->next_frame;
- bp = (unsigned long) frame;
- } else {
- ops->address(data, addr, bp == 0);
- }
- }
- stack++;
- }
- return bp;
-}
-
-void dump_trace(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp,
- const struct stacktrace_ops *ops, void *data)
-{
- const unsigned cpu = get_cpu();
- unsigned long *irqstack_end = (unsigned long *)cpu_pda(cpu)->irqstackptr;
- unsigned used = 0;
- struct thread_info *tinfo;
-
- if (!task)
- task = current;
-
- if (!stack) {
- unsigned long dummy;
- stack = &dummy;
- if (task && task != current)
- stack = (unsigned long *)task->thread.sp;
- }
-
-#ifdef CONFIG_FRAME_POINTER
- if (!bp) {
- if (task == current) {
- /* Grab bp right from our regs */
- asm("movq %%rbp, %0" : "=r" (bp) : );
- } else {
- /* bp is the last reg pushed by switch_to */
- bp = *(unsigned long *) task->thread.sp;
- }
- }
-#endif
-
- /*
- * Print function call entries in all stacks, starting at the
- * current stack address. If the stacks consist of nested
- * exceptions
- */
- tinfo = task_thread_info(task);
- for (;;) {
- char *id;
- unsigned long *estack_end;
- estack_end = in_exception_stack(cpu, (unsigned long)stack,
- &used, &id);
-
- if (estack_end) {
- if (ops->stack(data, id) < 0)
- break;
-
- bp = print_context_stack(tinfo, stack, bp, ops,
- data, estack_end);
- ops->stack(data, "<EOE>");
- /*
- * We link to the next stack via the
- * second-to-last pointer (index -2 to end) in the
- * exception stack:
- */
- stack = (unsigned long *) estack_end[-2];
- continue;
- }
- if (irqstack_end) {
- unsigned long *irqstack;
- irqstack = irqstack_end -
- (IRQSTACKSIZE - 64) / sizeof(*irqstack);
-
- if (stack >= irqstack && stack < irqstack_end) {
- if (ops->stack(data, "IRQ") < 0)
- break;
- bp = print_context_stack(tinfo, stack, bp,
- ops, data, irqstack_end);
- /*
- * We link to the next stack (which would be
- * the process stack normally) the last
- * pointer (index -1 to end) in the IRQ stack:
- */
- stack = (unsigned long *) (irqstack_end[-1]);
- irqstack_end = NULL;
- ops->stack(data, "EOI");
- continue;
- }
- }
- break;
- }
-
- /*
- * This handles the process stack:
- */
- bp = print_context_stack(tinfo, stack, bp, ops, data, NULL);
- put_cpu();
-}
-EXPORT_SYMBOL(dump_trace);
-
-static void
-print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
-{
- print_symbol(msg, symbol);
- printk("\n");
-}
-
-static void print_trace_warning(void *data, char *msg)
-{
- printk("%s\n", msg);
-}
-
-static int print_trace_stack(void *data, char *name)
-{
- printk(" <%s> ", name);
- return 0;
-}
-
-static void print_trace_address(void *data, unsigned long addr, int reliable)
-{
- touch_nmi_watchdog();
- printk_address(addr, reliable);
-}
-
-static const struct stacktrace_ops print_trace_ops = {
- .warning = print_trace_warning,
- .warning_symbol = print_trace_warning_symbol,
- .stack = print_trace_stack,
- .address = print_trace_address,
-};
-
-static void
-show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp, char *log_lvl)
-{
- printk("Call Trace:\n");
- dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
-}
-
-void show_trace(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp)
-{
- show_trace_log_lvl(task, regs, stack, bp, "");
-}
-
-static void
-show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *sp, unsigned long bp, char *log_lvl)
-{
- unsigned long *stack;
- int i;
- const int cpu = smp_processor_id();
- unsigned long *irqstack_end =
- (unsigned long *) (cpu_pda(cpu)->irqstackptr);
- unsigned long *irqstack =
- (unsigned long *) (cpu_pda(cpu)->irqstackptr - IRQSTACKSIZE);
-
- /*
- * debugging aid: "show_stack(NULL, NULL);" prints the
- * back trace for this cpu.
- */
-
- if (sp == NULL) {
- if (task)
- sp = (unsigned long *)task->thread.sp;
- else
- sp = (unsigned long *)&sp;
- }
-
- stack = sp;
- for (i = 0; i < kstack_depth_to_print; i++) {
- if (stack >= irqstack && stack <= irqstack_end) {
- if (stack == irqstack_end) {
- stack = (unsigned long *) (irqstack_end[-1]);
- printk(" <EOI> ");
- }
- } else {
- if (((long) stack & (THREAD_SIZE-1)) == 0)
- break;
- }
- if (i && ((i % 4) == 0))
- printk("\n");
- printk(" %016lx", *stack++);
- touch_nmi_watchdog();
- }
- printk("\n");
- show_trace_log_lvl(task, regs, sp, bp, log_lvl);
-}
-
-void show_stack(struct task_struct *task, unsigned long *sp)
-{
- show_stack_log_lvl(task, NULL, sp, 0, "");
-}
-
-/*
- * The architecture-independent dump_stack generator
- */
-void dump_stack(void)
-{
- unsigned long bp = 0;
- unsigned long stack;
-
-#ifdef CONFIG_FRAME_POINTER
- if (!bp)
- asm("movq %%rbp, %0" : "=r" (bp) : );
-#endif
-
- printk("Pid: %d, comm: %.20s %s %s %.*s\n",
- current->pid, current->comm, print_tainted(),
- init_utsname()->release,
- (int)strcspn(init_utsname()->version, " "),
- init_utsname()->version);
- show_trace(NULL, NULL, &stack, bp);
-}
-EXPORT_SYMBOL(dump_stack);
-
-void show_registers(struct pt_regs *regs)
-{
- int i;
- unsigned long sp;
- const int cpu = smp_processor_id();
- struct task_struct *cur = cpu_pda(cpu)->pcurrent;
-
- sp = regs->sp;
- printk("CPU %d ", cpu);
- __show_regs(regs);
- printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
- cur->comm, cur->pid, task_thread_info(cur), cur);
-
- /*
- * When in-kernel, we also print out the stack and code at the
- * time of the fault..
- */
- if (!user_mode(regs)) {
- unsigned int code_prologue = code_bytes * 43 / 64;
- unsigned int code_len = code_bytes;
- unsigned char c;
- u8 *ip;
-
- printk("Stack: ");
- show_stack_log_lvl(NULL, regs, (unsigned long *)sp,
- regs->bp, "");
-
- printk(KERN_EMERG "Code: ");
-
- ip = (u8 *)regs->ip - code_prologue;
- if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
- /* try starting at RIP */
- ip = (u8 *)regs->ip;
- code_len = code_len - code_prologue + 1;
- }
- for (i = 0; i < code_len; i++, ip++) {
- if (ip < (u8 *)PAGE_OFFSET ||
- probe_kernel_address(ip, c)) {
- printk(" Bad RIP value.");
- break;
- }
- if (ip == (u8 *)regs->ip)
- printk("<%02x> ", c);
- else
- printk("%02x ", c);
- }
- }
- printk("\n");
-}
-
-int is_valid_bugaddr(unsigned long ip)
-{
- unsigned short ud2;
-
- if (__copy_from_user(&ud2, (const void __user *) ip, sizeof(ud2)))
- return 0;
-
- return ud2 == 0x0b0f;
-}
-
-static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
-static int die_owner = -1;
-static unsigned int die_nest_count;
-
-unsigned __kprobes long oops_begin(void)
-{
- int cpu;
- unsigned long flags;
-
- oops_enter();
-
- /* racy, but better than risking deadlock. */
- raw_local_irq_save(flags);
- cpu = smp_processor_id();
- if (!__raw_spin_trylock(&die_lock)) {
- if (cpu == die_owner)
- /* nested oops. should stop eventually */;
- else
- __raw_spin_lock(&die_lock);
- }
- die_nest_count++;
- die_owner = cpu;
- console_verbose();
- bust_spinlocks(1);
- return flags;
-}
-
-void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
-{
- die_owner = -1;
- bust_spinlocks(0);
- die_nest_count--;
- if (!die_nest_count)
- /* Nest count reaches zero, release the lock. */
- __raw_spin_unlock(&die_lock);
- raw_local_irq_restore(flags);
- if (!regs) {
- oops_exit();
- return;
- }
- if (panic_on_oops)
- panic("Fatal exception");
- oops_exit();
- do_exit(signr);
-}
-
-int __kprobes __die(const char *str, struct pt_regs *regs, long err)
-{
- printk(KERN_EMERG "%s: %04lx [%u] ", str, err & 0xffff, ++die_counter);
-#ifdef CONFIG_PREEMPT
- printk("PREEMPT ");
-#endif
-#ifdef CONFIG_SMP
- printk("SMP ");
-#endif
-#ifdef CONFIG_DEBUG_PAGEALLOC
- printk("DEBUG_PAGEALLOC");
-#endif
- printk("\n");
- if (notify_die(DIE_OOPS, str, regs, err,
- current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
- return 1;
-
- show_registers(regs);
- add_taint(TAINT_DIE);
- /* Executive summary in case the oops scrolled away */
- printk(KERN_ALERT "RIP ");
- printk_address(regs->ip, 1);
- printk(" RSP <%016lx>\n", regs->sp);
- if (kexec_should_crash(current))
- crash_kexec(regs);
- return 0;
-}
-
-void die(const char *str, struct pt_regs *regs, long err)
-{
- unsigned long flags = oops_begin();
-
- if (!user_mode(regs))
- report_bug(regs->ip, regs);
-
- if (__die(str, regs, err))
- regs = NULL;
- oops_end(flags, regs, SIGSEGV);
-}
-
-notrace __kprobes void
-die_nmi(char *str, struct pt_regs *regs, int do_panic)
-{
- unsigned long flags;
-
- if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
- return;
-
- flags = oops_begin();
- /*
- * We are in trouble anyway, lets at least try
- * to get a message out.
- */
- printk(KERN_EMERG "%s", str);
- printk(" on CPU%d, ip %08lx, registers:\n",
- smp_processor_id(), regs->ip);
- show_registers(regs);
- if (kexec_should_crash(current))
- crash_kexec(regs);
- if (do_panic || panic_on_oops)
- panic("Non maskable interrupt");
- oops_end(flags, NULL, SIGBUS);
- nmi_exit();
- local_irq_enable();
- do_exit(SIGBUS);
-}
-
-static void __kprobes
-do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
- long error_code, siginfo_t *info)
-{
- struct task_struct *tsk = current;
-
- if (!user_mode(regs))
- goto kernel_trap;
-
- /*
- * We want error_code and trap_no set for userspace faults and
- * kernelspace faults which result in die(), but not
- * kernelspace faults which are fixed up. die() gives the
- * process no chance to handle the signal and notice the
- * kernel fault information, so that won't result in polluting
- * the information about previously queued, but not yet
- * delivered, faults. See also do_general_protection below.
- */
- tsk->thread.error_code = error_code;
- tsk->thread.trap_no = trapnr;
-
- if (show_unhandled_signals && unhandled_signal(tsk, signr) &&
- printk_ratelimit()) {
- printk(KERN_INFO
- "%s[%d] trap %s ip:%lx sp:%lx error:%lx",
- tsk->comm, tsk->pid, str,
- regs->ip, regs->sp, error_code);
- print_vma_addr(" in ", regs->ip);
- printk("\n");
- }
-
- if (info)
- force_sig_info(signr, info, tsk);
- else
- force_sig(signr, tsk);
- return;
-
-kernel_trap:
- if (!fixup_exception(regs)) {
- tsk->thread.error_code = error_code;
- tsk->thread.trap_no = trapnr;
- die(str, regs, error_code);
- }
- return;
-}
-
-#define DO_ERROR(trapnr, signr, str, name) \
-asmlinkage void do_##name(struct pt_regs *regs, long error_code) \
-{ \
- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
- == NOTIFY_STOP) \
- return; \
- conditional_sti(regs); \
- do_trap(trapnr, signr, str, regs, error_code, NULL); \
-}
-
-#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
-asmlinkage void do_##name(struct pt_regs *regs, long error_code) \
-{ \
- siginfo_t info; \
- info.si_signo = signr; \
- info.si_errno = 0; \
- info.si_code = sicode; \
- info.si_addr = (void __user *)siaddr; \
- trace_hardirqs_fixup(); \
- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
- == NOTIFY_STOP) \
- return; \
- conditional_sti(regs); \
- do_trap(trapnr, signr, str, regs, error_code, &info); \
-}
-
-DO_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
-DO_ERROR(4, SIGSEGV, "overflow", overflow)
-DO_ERROR(5, SIGSEGV, "bounds", bounds)
-DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip)
-DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
-DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
-DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
-DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
-
-/* Runs on IST stack */
-asmlinkage void do_stack_segment(struct pt_regs *regs, long error_code)
-{
- if (notify_die(DIE_TRAP, "stack segment", regs, error_code,
- 12, SIGBUS) == NOTIFY_STOP)
- return;
- preempt_conditional_sti(regs);
- do_trap(12, SIGBUS, "stack segment", regs, error_code, NULL);
- preempt_conditional_cli(regs);
-}
-
-asmlinkage void do_double_fault(struct pt_regs *regs, long error_code)
-{
- static const char str[] = "double fault";
- struct task_struct *tsk = current;
-
- /* Return not checked because double check cannot be ignored */
- notify_die(DIE_TRAP, str, regs, error_code, 8, SIGSEGV);
-
- tsk->thread.error_code = error_code;
- tsk->thread.trap_no = 8;
-
- /* This is always a kernel trap and never fixable (and thus must
- never return). */
- for (;;)
- die(str, regs, error_code);
-}
-
-asmlinkage void __kprobes
-do_general_protection(struct pt_regs *regs, long error_code)
-{
- struct task_struct *tsk;
-
- conditional_sti(regs);
-
- tsk = current;
- if (!user_mode(regs))
- goto gp_in_kernel;
-
- tsk->thread.error_code = error_code;
- tsk->thread.trap_no = 13;
-
- if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
- printk_ratelimit()) {
- printk(KERN_INFO
- "%s[%d] general protection ip:%lx sp:%lx error:%lx",
- tsk->comm, tsk->pid,
- regs->ip, regs->sp, error_code);
- print_vma_addr(" in ", regs->ip);
- printk("\n");
- }
-
- force_sig(SIGSEGV, tsk);
- return;
-
-gp_in_kernel:
- if (fixup_exception(regs))
- return;
-
- tsk->thread.error_code = error_code;
- tsk->thread.trap_no = 13;
- if (notify_die(DIE_GPF, "general protection fault", regs,
- error_code, 13, SIGSEGV) == NOTIFY_STOP)
- return;
- die("general protection fault", regs, error_code);
-}
-
-static notrace __kprobes void
-mem_parity_error(unsigned char reason, struct pt_regs *regs)
-{
- printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x.\n",
- reason);
- printk(KERN_EMERG "You have some hardware problem, likely on the PCI bus.\n");
-
-#if defined(CONFIG_EDAC)
- if (edac_handler_set()) {
- edac_atomic_assert_error();
- return;
- }
-#endif
-
- if (panic_on_unrecovered_nmi)
- panic("NMI: Not continuing");
-
- printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
-
- /* Clear and disable the memory parity error line. */
- reason = (reason & 0xf) | 4;
- outb(reason, 0x61);
-}
-
-static notrace __kprobes void
-io_check_error(unsigned char reason, struct pt_regs *regs)
-{
- printk("NMI: IOCK error (debug interrupt?)\n");
- show_registers(regs);
-
- /* Re-enable the IOCK line, wait for a few seconds */
- reason = (reason & 0xf) | 8;
- outb(reason, 0x61);
- mdelay(2000);
- reason &= ~8;
- outb(reason, 0x61);
-}
-
-static notrace __kprobes void
-unknown_nmi_error(unsigned char reason, struct pt_regs *regs)
-{
- if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) ==
- NOTIFY_STOP)
- return;
- printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x.\n",
- reason);
- printk(KERN_EMERG "Do you have a strange power saving mode enabled?\n");
-
- if (panic_on_unrecovered_nmi)
- panic("NMI: Not continuing");
-
- printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
-}
-
-/* Runs on IST stack. This code must keep interrupts off all the time.
- Nested NMIs are prevented by the CPU. */
-asmlinkage notrace __kprobes void default_do_nmi(struct pt_regs *regs)
-{
- unsigned char reason = 0;
- int cpu;
-
- cpu = smp_processor_id();
-
- /* Only the BSP gets external NMIs from the system. */
- if (!cpu)
- reason = get_nmi_reason();
-
- if (!(reason & 0xc0)) {
- if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
- == NOTIFY_STOP)
- return;
- /*
- * Ok, so this is none of the documented NMI sources,
- * so it must be the NMI watchdog.
- */
- if (nmi_watchdog_tick(regs, reason))
- return;
- if (!do_nmi_callback(regs, cpu))
- unknown_nmi_error(reason, regs);
-
- return;
- }
- if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
- return;
-
- /* AK: following checks seem to be broken on modern chipsets. FIXME */
- if (reason & 0x80)
- mem_parity_error(reason, regs);
- if (reason & 0x40)
- io_check_error(reason, regs);
-}
-
-asmlinkage notrace __kprobes void
-do_nmi(struct pt_regs *regs, long error_code)
-{
- nmi_enter();
-
- add_pda(__nmi_count, 1);
-
- if (!ignore_nmis)
- default_do_nmi(regs);
-
- nmi_exit();
-}
-
-void stop_nmi(void)
-{
- acpi_nmi_disable();
- ignore_nmis++;
-}
-
-void restart_nmi(void)
-{
- ignore_nmis--;
- acpi_nmi_enable();
-}
-
-/* runs on IST stack. */
-asmlinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
-{
- trace_hardirqs_fixup();
-
- if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
- == NOTIFY_STOP)
- return;
-
- preempt_conditional_sti(regs);
- do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);
- preempt_conditional_cli(regs);
-}
-
-/* Help handler running on IST stack to switch back to user stack
- for scheduling or signal handling. The actual stack switch is done in
- entry.S */
-asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *eregs)
-{
- struct pt_regs *regs = eregs;
- /* Did already sync */
- if (eregs == (struct pt_regs *)eregs->sp)
- ;
- /* Exception from user space */
- else if (user_mode(eregs))
- regs = task_pt_regs(current);
- /* Exception from kernel and interrupts are enabled. Move to
- kernel process stack. */
- else if (eregs->flags & X86_EFLAGS_IF)
- regs = (struct pt_regs *)(eregs->sp -= sizeof(struct pt_regs));
- if (eregs != regs)
- *regs = *eregs;
- return regs;
-}
-
-/* runs on IST stack. */
-asmlinkage void __kprobes do_debug(struct pt_regs *regs,
- unsigned long error_code)
-{
- struct task_struct *tsk = current;
- unsigned long condition;
- siginfo_t info;
-
- trace_hardirqs_fixup();
-
- get_debugreg(condition, 6);
-
- /*
- * The processor cleared BTF, so don't mark that we need it set.
- */
- clear_tsk_thread_flag(tsk, TIF_DEBUGCTLMSR);
- tsk->thread.debugctlmsr = 0;
-
- if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
- SIGTRAP) == NOTIFY_STOP)
- return;
-
- preempt_conditional_sti(regs);
-
- /* Mask out spurious debug traps due to lazy DR7 setting */
- if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
- if (!tsk->thread.debugreg7)
- goto clear_dr7;
- }
-
- tsk->thread.debugreg6 = condition;
-
- /*
- * Single-stepping through TF: make sure we ignore any events in
- * kernel space (but re-enable TF when returning to user mode).
- */
- if (condition & DR_STEP) {
- if (!user_mode(regs))
- goto clear_TF_reenable;
- }
-
- /* Ok, finally something we can handle */
- tsk->thread.trap_no = 1;
- tsk->thread.error_code = error_code;
- info.si_signo = SIGTRAP;
- info.si_errno = 0;
- info.si_code = get_si_code(condition);
- info.si_addr = user_mode(regs) ? (void __user *)regs->ip : NULL;
- force_sig_info(SIGTRAP, &info, tsk);
-
-clear_dr7:
- set_debugreg(0, 7);
- preempt_conditional_cli(regs);
- return;
-
-clear_TF_reenable:
- set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
- regs->flags &= ~X86_EFLAGS_TF;
- preempt_conditional_cli(regs);
- return;
-}
-
-static int kernel_math_error(struct pt_regs *regs, const char *str, int trapnr)
-{
- if (fixup_exception(regs))
- return 1;
-
- notify_die(DIE_GPF, str, regs, 0, trapnr, SIGFPE);
- /* Illegal floating point operation in the kernel */
- current->thread.trap_no = trapnr;
- die(str, regs, 0);
- return 0;
-}
-
-/*
- * Note that we play around with the 'TS' bit in an attempt to get
- * the correct behaviour even in the presence of the asynchronous
- * IRQ13 behaviour
- */
-asmlinkage void do_coprocessor_error(struct pt_regs *regs)
-{
- void __user *ip = (void __user *)(regs->ip);
- struct task_struct *task;
- siginfo_t info;
- unsigned short cwd, swd;
-
- conditional_sti(regs);
- if (!user_mode(regs) &&
- kernel_math_error(regs, "kernel x87 math error", 16))
- return;
-
- /*
- * Save the info for the exception handler and clear the error.
- */
- task = current;
- save_init_fpu(task);
- task->thread.trap_no = 16;
- task->thread.error_code = 0;
- info.si_signo = SIGFPE;
- info.si_errno = 0;
- info.si_code = __SI_FAULT;
- info.si_addr = ip;
- /*
- * (~cwd & swd) will mask out exceptions that are not set to unmasked
- * status. 0x3f is the exception bits in these regs, 0x200 is the
- * C1 reg you need in case of a stack fault, 0x040 is the stack
- * fault bit. We should only be taking one exception at a time,
- * so if this combination doesn't produce any single exception,
- * then we have a bad program that isn't synchronizing its FPU usage
- * and it will suffer the consequences since we won't be able to
- * fully reproduce the context of the exception
- */
- cwd = get_fpu_cwd(task);
- swd = get_fpu_swd(task);
- switch (swd & ~cwd & 0x3f) {
- case 0x000: /* No unmasked exception */
- default: /* Multiple exceptions */
- break;
- case 0x001: /* Invalid Op */
- /*
- * swd & 0x240 == 0x040: Stack Underflow
- * swd & 0x240 == 0x240: Stack Overflow
- * User must clear the SF bit (0x40) if set
- */
- info.si_code = FPE_FLTINV;
- break;
- case 0x002: /* Denormalize */
- case 0x010: /* Underflow */
- info.si_code = FPE_FLTUND;
- break;
- case 0x004: /* Zero Divide */
- info.si_code = FPE_FLTDIV;
- break;
- case 0x008: /* Overflow */
- info.si_code = FPE_FLTOVF;
- break;
- case 0x020: /* Precision */
- info.si_code = FPE_FLTRES;
- break;
- }
- force_sig_info(SIGFPE, &info, task);
-}
-
-asmlinkage void bad_intr(void)
-{
- printk("bad interrupt");
-}
-
-asmlinkage void do_simd_coprocessor_error(struct pt_regs *regs)
-{
- void __user *ip = (void __user *)(regs->ip);
- struct task_struct *task;
- siginfo_t info;
- unsigned short mxcsr;
-
- conditional_sti(regs);
- if (!user_mode(regs) &&
- kernel_math_error(regs, "kernel simd math error", 19))
- return;
-
- /*
- * Save the info for the exception handler and clear the error.
- */
- task = current;
- save_init_fpu(task);
- task->thread.trap_no = 19;
- task->thread.error_code = 0;
- info.si_signo = SIGFPE;
- info.si_errno = 0;
- info.si_code = __SI_FAULT;
- info.si_addr = ip;
- /*
- * The SIMD FPU exceptions are handled a little differently, as there
- * is only a single status/control register. Thus, to determine which
- * unmasked exception was caught we must mask the exception mask bits
- * at 0x1f80, and then use these to mask the exception bits at 0x3f.
- */
- mxcsr = get_fpu_mxcsr(task);
- switch (~((mxcsr & 0x1f80) >> 7) & (mxcsr & 0x3f)) {
- case 0x000:
- default:
- break;
- case 0x001: /* Invalid Op */
- info.si_code = FPE_FLTINV;
- break;
- case 0x002: /* Denormalize */
- case 0x010: /* Underflow */
- info.si_code = FPE_FLTUND;
- break;
- case 0x004: /* Zero Divide */
- info.si_code = FPE_FLTDIV;
- break;
- case 0x008: /* Overflow */
- info.si_code = FPE_FLTOVF;
- break;
- case 0x020: /* Precision */
- info.si_code = FPE_FLTRES;
- break;
- }
- force_sig_info(SIGFPE, &info, task);
-}
-
-asmlinkage void do_spurious_interrupt_bug(struct pt_regs *regs)
-{
-}
-
-asmlinkage void __attribute__((weak)) smp_thermal_interrupt(void)
-{
-}
-
-asmlinkage void __attribute__((weak)) mce_threshold_interrupt(void)
-{
-}
-
-/*
- * 'math_state_restore()' saves the current math information in the
- * old math state array, and gets the new ones from the current task
- *
- * Careful.. There are problems with IBM-designed IRQ13 behaviour.
- * Don't touch unless you *really* know how it works.
- */
-asmlinkage void math_state_restore(void)
-{
- struct task_struct *me = current;
-
- if (!used_math()) {
- local_irq_enable();
- /*
- * does a slab alloc which can sleep
- */
- if (init_fpu(me)) {
- /*
- * ran out of memory!
- */
- do_group_exit(SIGKILL);
- return;
- }
- local_irq_disable();
- }
-
- clts(); /* Allow maths ops (or we recurse) */
- /*
- * Paranoid restore. send a SIGSEGV if we fail to restore the state.
- */
- if (unlikely(restore_fpu_checking(me))) {
- stts();
- force_sig(SIGSEGV, me);
- return;
- }
- task_thread_info(me)->status |= TS_USEDFPU;
- me->fpu_counter++;
-}
-EXPORT_SYMBOL_GPL(math_state_restore);
-
-void __init trap_init(void)
-{
- set_intr_gate(0, ÷_error);
- set_intr_gate_ist(1, &debug, DEBUG_STACK);
- set_intr_gate_ist(2, &nmi, NMI_STACK);
- /* int3 can be called from all */
- set_system_gate_ist(3, &int3, DEBUG_STACK);
- /* int4 can be called from all */
- set_system_gate(4, &overflow);
- set_intr_gate(5, &bounds);
- set_intr_gate(6, &invalid_op);
- set_intr_gate(7, &device_not_available);
- set_intr_gate_ist(8, &double_fault, DOUBLEFAULT_STACK);
- set_intr_gate(9, &coprocessor_segment_overrun);
- set_intr_gate(10, &invalid_TSS);
- set_intr_gate(11, &segment_not_present);
- set_intr_gate_ist(12, &stack_segment, STACKFAULT_STACK);
- set_intr_gate(13, &general_protection);
- set_intr_gate(14, &page_fault);
- set_intr_gate(15, &spurious_interrupt_bug);
- set_intr_gate(16, &coprocessor_error);
- set_intr_gate(17, &alignment_check);
-#ifdef CONFIG_X86_MCE
- set_intr_gate_ist(18, &machine_check, MCE_STACK);
-#endif
- set_intr_gate(19, &simd_coprocessor_error);
-
-#ifdef CONFIG_IA32_EMULATION
- set_system_gate(IA32_SYSCALL_VECTOR, ia32_syscall);
-#endif
- /*
- * Should be a barrier for any external CPU state:
- */
- cpu_init();
-}
-
-static int __init oops_setup(char *s)
-{
- if (!s)
- return -EINVAL;
- if (!strcmp(s, "panic"))
- panic_on_oops = 1;
- return 0;
-}
-early_param("oops", oops_setup);
-
-static int __init kstack_setup(char *s)
-{
- if (!s)
- return -EINVAL;
- kstack_depth_to_print = simple_strtoul(s, NULL, 0);
- return 0;
-}
-early_param("kstack", kstack_setup);
-
-static int __init code_bytes_setup(char *s)
-{
- code_bytes = simple_strtoul(s, NULL, 0);
- if (code_bytes > 8192)
- code_bytes = 8192;
-
- return 1;
-}
-__setup("code_bytes=", code_bytes_setup);
diff --git a/arch/x86/kernel/vmlinux_64.lds.S b/arch/x86/kernel/vmlinux_64.lds.S
index 201e81a..46e0544 100644
--- a/arch/x86/kernel/vmlinux_64.lds.S
+++ b/arch/x86/kernel/vmlinux_64.lds.S
@@ -172,8 +172,8 @@ SECTIONS
.x86_cpu_dev.init : AT(ADDR(.x86_cpu_dev.init) - LOAD_OFFSET) {
*(.x86_cpu_dev.init)
}
- SECURITY_INIT
__x86_cpu_dev_end = .;
+ SECURITY_INIT
. = ALIGN(8);
.parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) {
diff --git a/arch/x86/mach-generic/es7000.c b/arch/x86/mach-generic/es7000.c
index 520cca0..6513d41 100644
--- a/arch/x86/mach-generic/es7000.c
+++ b/arch/x86/mach-generic/es7000.c
@@ -47,16 +47,26 @@ static __init int mps_oem_check(struct mp_config_table *mpc, char *oem,
/* Hook from generic ACPI tables.c */
static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
- unsigned long oem_addr;
+ unsigned long oem_addr = 0;
+ int check_dsdt;
+ int ret = 0;
+
+ /* check dsdt at first to avoid clear fix_map for oem_addr */
+ check_dsdt = es7000_check_dsdt();
+
if (!find_unisys_acpi_oem_table(&oem_addr)) {
- if (es7000_check_dsdt())
- return parse_unisys_oem((char *)oem_addr);
+ if (check_dsdt)
+ ret = parse_unisys_oem((char *)oem_addr);
else {
setup_unisys();
- return 1;
+ ret = 1;
}
+ /*
+ * we need to unmap it
+ */
+ unmap_unisys_acpi_oem_table(oem_addr);
}
- return 0;
+ return ret;
}
#else
static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
index dfb932d..59f89b4 100644
--- a/arch/x86/mm/Makefile
+++ b/arch/x86/mm/Makefile
@@ -13,12 +13,8 @@ obj-$(CONFIG_MMIOTRACE) += mmiotrace.o
mmiotrace-y := pf_in.o mmio-mod.o
obj-$(CONFIG_MMIOTRACE_TEST) += testmmiotrace.o
-ifeq ($(CONFIG_X86_32),y)
-obj-$(CONFIG_NUMA) += discontig_32.o
-else
-obj-$(CONFIG_NUMA) += numa_64.o
+obj-$(CONFIG_NUMA) += numa_$(BITS).o
obj-$(CONFIG_K8_NUMA) += k8topology_64.o
-endif
obj-$(CONFIG_ACPI_NUMA) += srat_$(BITS).o
obj-$(CONFIG_MEMTEST) += memtest.o
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 8f92cac..3f2b896 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -592,11 +592,6 @@ void __kprobes do_page_fault(struct pt_regs *regs, unsigned long error_code)
unsigned long flags;
#endif
- /*
- * We can fault from pretty much anywhere, with unknown IRQ state.
- */
- trace_hardirqs_fixup();
-
tsk = current;
mm = tsk->mm;
prefetchw(&mm->mmap_sem);
@@ -914,15 +909,15 @@ LIST_HEAD(pgd_list);
void vmalloc_sync_all(void)
{
-#ifdef CONFIG_X86_32
- unsigned long start = VMALLOC_START & PGDIR_MASK;
unsigned long address;
+#ifdef CONFIG_X86_32
if (SHARED_KERNEL_PMD)
return;
- BUILD_BUG_ON(TASK_SIZE & ~PGDIR_MASK);
- for (address = start; address >= TASK_SIZE; address += PGDIR_SIZE) {
+ for (address = VMALLOC_START & PMD_MASK;
+ address >= TASK_SIZE && address < FIXADDR_TOP;
+ address += PMD_SIZE) {
unsigned long flags;
struct page *page;
@@ -935,10 +930,8 @@ void vmalloc_sync_all(void)
spin_unlock_irqrestore(&pgd_lock, flags);
}
#else /* CONFIG_X86_64 */
- unsigned long start = VMALLOC_START & PGDIR_MASK;
- unsigned long address;
-
- for (address = start; address <= VMALLOC_END; address += PGDIR_SIZE) {
+ for (address = VMALLOC_START & PGDIR_MASK; address <= VMALLOC_END;
+ address += PGDIR_SIZE) {
const pgd_t *pgd_ref = pgd_offset_k(address);
unsigned long flags;
struct page *page;
diff --git a/arch/x86/mm/gup.c b/arch/x86/mm/gup.c
index 007bb06..4ba373c 100644
--- a/arch/x86/mm/gup.c
+++ b/arch/x86/mm/gup.c
@@ -82,7 +82,7 @@ static noinline int gup_pte_range(pmd_t pmd, unsigned long addr,
pte_t pte = gup_get_pte(ptep);
struct page *page;
- if ((pte_val(pte) & (mask | _PAGE_SPECIAL)) != mask) {
+ if ((pte_flags(pte) & (mask | _PAGE_SPECIAL)) != mask) {
pte_unmap(ptep);
return 0;
}
@@ -116,10 +116,10 @@ static noinline int gup_huge_pmd(pmd_t pmd, unsigned long addr,
mask = _PAGE_PRESENT|_PAGE_USER;
if (write)
mask |= _PAGE_RW;
- if ((pte_val(pte) & mask) != mask)
+ if ((pte_flags(pte) & mask) != mask)
return 0;
/* hugepages are never "special" */
- VM_BUG_ON(pte_val(pte) & _PAGE_SPECIAL);
+ VM_BUG_ON(pte_flags(pte) & _PAGE_SPECIAL);
VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
refs = 0;
@@ -173,10 +173,10 @@ static noinline int gup_huge_pud(pud_t pud, unsigned long addr,
mask = _PAGE_PRESENT|_PAGE_USER;
if (write)
mask |= _PAGE_RW;
- if ((pte_val(pte) & mask) != mask)
+ if ((pte_flags(pte) & mask) != mask)
return 0;
/* hugepages are never "special" */
- VM_BUG_ON(pte_val(pte) & _PAGE_SPECIAL);
+ VM_BUG_ON(pte_flags(pte) & _PAGE_SPECIAL);
VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
refs = 0;
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index c3789bb..c67d78d 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -557,7 +557,7 @@ void zap_low_mappings(void)
int nx_enabled;
-pteval_t __supported_pte_mask __read_mostly = ~(_PAGE_NX | _PAGE_GLOBAL);
+pteval_t __supported_pte_mask __read_mostly = ~(_PAGE_NX | _PAGE_GLOBAL | _PAGE_IOMAP);
EXPORT_SYMBOL_GPL(__supported_pte_mask);
#ifdef CONFIG_X86_PAE
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 83e13f2..8bd797b 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -88,7 +88,7 @@ early_param("gbpages", parse_direct_gbpages_on);
int after_bootmem;
-unsigned long __supported_pte_mask __read_mostly = ~0UL;
+pteval_t __supported_pte_mask __read_mostly = ~_PAGE_IOMAP;
EXPORT_SYMBOL_GPL(__supported_pte_mask);
static int do_not_nx __cpuinitdata;
@@ -195,9 +195,6 @@ set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte)
}
pte = pte_offset_kernel(pmd, vaddr);
- if (!pte_none(*pte) && pte_val(new_pte) &&
- pte_val(*pte) != (pte_val(new_pte) & __supported_pte_mask))
- pte_ERROR(*pte);
set_pte(pte, new_pte);
/*
@@ -312,7 +309,7 @@ static __ref void *alloc_low_page(unsigned long *phys)
if (pfn >= table_top)
panic("alloc_low_page: ran out of memory");
- adr = early_ioremap(pfn * PAGE_SIZE, PAGE_SIZE);
+ adr = early_memremap(pfn * PAGE_SIZE, PAGE_SIZE);
memset(adr, 0, PAGE_SIZE);
*phys = pfn * PAGE_SIZE;
return adr;
@@ -748,7 +745,7 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
old_start = mr[i].start;
memmove(&mr[i], &mr[i+1],
(nr_range - 1 - i) * sizeof (struct map_range));
- mr[i].start = old_start;
+ mr[i--].start = old_start;
nr_range--;
}
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 6ab3196..ddb3751 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -24,18 +24,47 @@
#ifdef CONFIG_X86_64
+static inline int phys_addr_valid(unsigned long addr)
+{
+ return addr < (1UL << boot_cpu_data.x86_phys_bits);
+}
+
unsigned long __phys_addr(unsigned long x)
{
- if (x >= __START_KERNEL_map)
- return x - __START_KERNEL_map + phys_base;
- return x - PAGE_OFFSET;
+ if (x >= __START_KERNEL_map) {
+ x -= __START_KERNEL_map;
+ VIRTUAL_BUG_ON(x >= KERNEL_IMAGE_SIZE);
+ x += phys_base;
+ } else {
+ VIRTUAL_BUG_ON(x < PAGE_OFFSET);
+ x -= PAGE_OFFSET;
+ VIRTUAL_BUG_ON(system_state == SYSTEM_BOOTING ? x > MAXMEM :
+ !phys_addr_valid(x));
+ }
+ return x;
}
EXPORT_SYMBOL(__phys_addr);
-static inline int phys_addr_valid(unsigned long addr)
+bool __virt_addr_valid(unsigned long x)
{
- return addr < (1UL << boot_cpu_data.x86_phys_bits);
+ if (x >= __START_KERNEL_map) {
+ x -= __START_KERNEL_map;
+ if (x >= KERNEL_IMAGE_SIZE)
+ return false;
+ x += phys_base;
+ } else {
+ if (x < PAGE_OFFSET)
+ return false;
+ x -= PAGE_OFFSET;
+ if (system_state == SYSTEM_BOOTING ?
+ x > MAXMEM : !phys_addr_valid(x)) {
+ return false;
+ }
+ }
+
+ return pfn_valid(x >> PAGE_SHIFT);
}
+EXPORT_SYMBOL(__virt_addr_valid);
#else
@@ -44,6 +73,28 @@ static inline int phys_addr_valid(unsigned long addr)
return 1;
}
+#ifdef CONFIG_DEBUG_VIRTUAL
+unsigned long __phys_addr(unsigned long x)
+{
+ /* VMALLOC_* aren't constants; not available at the boot time */
+ VIRTUAL_BUG_ON(x < PAGE_OFFSET);
+ VIRTUAL_BUG_ON(system_state != SYSTEM_BOOTING &&
+ is_vmalloc_addr((void *) x));
+ return x - PAGE_OFFSET;
+}
+EXPORT_SYMBOL(__phys_addr);
+#endif
+
+bool __virt_addr_valid(unsigned long x)
+{
+ if (x < PAGE_OFFSET)
+ return false;
+ if (system_state != SYSTEM_BOOTING && is_vmalloc_addr((void *) x))
+ return false;
+ return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT);
+}
+EXPORT_SYMBOL(__virt_addr_valid);
+
#endif
int page_is_ram(unsigned long pagenr)
@@ -223,16 +274,16 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr,
switch (prot_val) {
case _PAGE_CACHE_UC:
default:
- prot = PAGE_KERNEL_NOCACHE;
+ prot = PAGE_KERNEL_IO_NOCACHE;
break;
case _PAGE_CACHE_UC_MINUS:
- prot = PAGE_KERNEL_UC_MINUS;
+ prot = PAGE_KERNEL_IO_UC_MINUS;
break;
case _PAGE_CACHE_WC:
- prot = PAGE_KERNEL_WC;
+ prot = PAGE_KERNEL_IO_WC;
break;
case _PAGE_CACHE_WB:
- prot = PAGE_KERNEL;
+ prot = PAGE_KERNEL_IO;
break;
}
@@ -549,12 +600,12 @@ static void __init __early_set_fixmap(enum fixed_addresses idx,
}
static inline void __init early_set_fixmap(enum fixed_addresses idx,
- unsigned long phys)
+ unsigned long phys, pgprot_t prot)
{
if (after_paging_init)
- set_fixmap(idx, phys);
+ __set_fixmap(idx, phys, prot);
else
- __early_set_fixmap(idx, phys, PAGE_KERNEL);
+ __early_set_fixmap(idx, phys, prot);
}
static inline void __init early_clear_fixmap(enum fixed_addresses idx)
@@ -565,16 +616,22 @@ static inline void __init early_clear_fixmap(enum fixed_addresses idx)
__early_set_fixmap(idx, 0, __pgprot(0));
}
-
-static int __initdata early_ioremap_nested;
-
+static void *prev_map[FIX_BTMAPS_SLOTS] __initdata;
+static unsigned long prev_size[FIX_BTMAPS_SLOTS] __initdata;
static int __init check_early_ioremap_leak(void)
{
- if (!early_ioremap_nested)
+ int count = 0;
+ int i;
+
+ for (i = 0; i < FIX_BTMAPS_SLOTS; i++)
+ if (prev_map[i])
+ count++;
+
+ if (!count)
return 0;
WARN(1, KERN_WARNING
"Debug warning: early ioremap leak of %d areas detected.\n",
- early_ioremap_nested);
+ count);
printk(KERN_WARNING
"please boot with early_ioremap_debug and report the dmesg.\n");
@@ -582,18 +639,33 @@ static int __init check_early_ioremap_leak(void)
}
late_initcall(check_early_ioremap_leak);
-void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
+static void __init *__early_ioremap(unsigned long phys_addr, unsigned long size, pgprot_t prot)
{
unsigned long offset, last_addr;
- unsigned int nrpages, nesting;
+ unsigned int nrpages;
enum fixed_addresses idx0, idx;
+ int i, slot;
WARN_ON(system_state != SYSTEM_BOOTING);
- nesting = early_ioremap_nested;
+ slot = -1;
+ for (i = 0; i < FIX_BTMAPS_SLOTS; i++) {
+ if (!prev_map[i]) {
+ slot = i;
+ break;
+ }
+ }
+
+ if (slot < 0) {
+ printk(KERN_INFO "early_iomap(%08lx, %08lx) not found slot\n",
+ phys_addr, size);
+ WARN_ON(1);
+ return NULL;
+ }
+
if (early_ioremap_debug) {
printk(KERN_INFO "early_ioremap(%08lx, %08lx) [%d] => ",
- phys_addr, size, nesting);
+ phys_addr, size, slot);
dump_stack();
}
@@ -604,11 +676,7 @@ void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
return NULL;
}
- if (nesting >= FIX_BTMAPS_NESTING) {
- WARN_ON(1);
- return NULL;
- }
- early_ioremap_nested++;
+ prev_size[slot] = size;
/*
* Mappings have to be page-aligned
*/
@@ -628,10 +696,10 @@ void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
/*
* Ok, go for it..
*/
- idx0 = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*nesting;
+ idx0 = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*slot;
idx = idx0;
while (nrpages > 0) {
- early_set_fixmap(idx, phys_addr);
+ early_set_fixmap(idx, phys_addr, prot);
phys_addr += PAGE_SIZE;
--idx;
--nrpages;
@@ -639,7 +707,20 @@ void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
if (early_ioremap_debug)
printk(KERN_CONT "%08lx + %08lx\n", offset, fix_to_virt(idx0));
- return (void *) (offset + fix_to_virt(idx0));
+ prev_map[slot] = (void *) (offset + fix_to_virt(idx0));
+ return prev_map[slot];
+}
+
+/* Remap an IO device */
+void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
+{
+ return __early_ioremap(phys_addr, size, PAGE_KERNEL_IO);
+}
+
+/* Remap memory */
+void __init *early_memremap(unsigned long phys_addr, unsigned long size)
+{
+ return __early_ioremap(phys_addr, size, PAGE_KERNEL);
}
void __init early_iounmap(void *addr, unsigned long size)
@@ -648,15 +729,33 @@ void __init early_iounmap(void *addr, unsigned long size)
unsigned long offset;
unsigned int nrpages;
enum fixed_addresses idx;
- int nesting;
+ int i, slot;
+
+ slot = -1;
+ for (i = 0; i < FIX_BTMAPS_SLOTS; i++) {
+ if (prev_map[i] == addr) {
+ slot = i;
+ break;
+ }
+ }
- nesting = --early_ioremap_nested;
- if (WARN_ON(nesting < 0))
+ if (slot < 0) {
+ printk(KERN_INFO "early_iounmap(%p, %08lx) not found slot\n",
+ addr, size);
+ WARN_ON(1);
return;
+ }
+
+ if (prev_size[slot] != size) {
+ printk(KERN_INFO "early_iounmap(%p, %08lx) [%d] size not consistent %08lx\n",
+ addr, size, slot, prev_size[slot]);
+ WARN_ON(1);
+ return;
+ }
if (early_ioremap_debug) {
printk(KERN_INFO "early_iounmap(%p, %08lx) [%d]\n", addr,
- size, nesting);
+ size, slot);
dump_stack();
}
@@ -668,12 +767,13 @@ void __init early_iounmap(void *addr, unsigned long size)
offset = virt_addr & ~PAGE_MASK;
nrpages = PAGE_ALIGN(offset + size - 1) >> PAGE_SHIFT;
- idx = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*nesting;
+ idx = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*slot;
while (nrpages > 0) {
early_clear_fixmap(idx);
--idx;
--nrpages;
}
+ prev_map[slot] = 0;
}
void __this_fixmap_does_not_exist(void)
diff --git a/arch/x86/mm/discontig_32.c b/arch/x86/mm/numa_32.c
similarity index 100%
rename from arch/x86/mm/discontig_32.c
rename to arch/x86/mm/numa_32.c
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index 3815e42..d3e6846 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -27,4 +27,12 @@ config XEN_MAX_DOMAIN_MEMORY
config XEN_SAVE_RESTORE
bool
depends on PM
- default y
\ No newline at end of file
+ default y
+
+config XEN_DEBUG_FS
+ bool "Enable Xen debug and tuning parameters in debugfs"
+ depends on XEN && DEBUG_FS
+ default n
+ help
+ Enable statistics output and various tuning options in debugfs.
+ Enabling this option may incur a significant performance overhead.
\ No newline at end of file
diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
index 59c1e53..3139479 100644
--- a/arch/x86/xen/Makefile
+++ b/arch/x86/xen/Makefile
@@ -1,4 +1,12 @@
-obj-y := enlighten.o setup.o multicalls.o mmu.o \
+ifdef CONFIG_FTRACE
+# Do not profile debug and lowlevel utilities
+CFLAGS_REMOVE_spinlock.o = -pg
+CFLAGS_REMOVE_time.o = -pg
+CFLAGS_REMOVE_irq.o = -pg
+endif
+
+obj-y := enlighten.o setup.o multicalls.o mmu.o irq.o \
time.o xen-asm_$(BITS).o grant-table.o suspend.o
-obj-$(CONFIG_SMP) += smp.o
+obj-$(CONFIG_SMP) += smp.o spinlock.o
+obj-$(CONFIG_XEN_DEBUG_FS) += debugfs.o
\ No newline at end of file
diff --git a/arch/x86/xen/debugfs.c b/arch/x86/xen/debugfs.c
new file mode 100644
index 0000000..b53225d
--- /dev/null
+++ b/arch/x86/xen/debugfs.c
@@ -0,0 +1,123 @@
+#include <linux/init.h>
+#include <linux/debugfs.h>
+#include <linux/module.h>
+
+#include "debugfs.h"
+
+static struct dentry *d_xen_debug;
+
+struct dentry * __init xen_init_debugfs(void)
+{
+ if (!d_xen_debug) {
+ d_xen_debug = debugfs_create_dir("xen", NULL);
+
+ if (!d_xen_debug)
+ pr_warning("Could not create 'xen' debugfs directory\n");
+ }
+
+ return d_xen_debug;
+}
+
+struct array_data
+{
+ void *array;
+ unsigned elements;
+};
+
+static int u32_array_open(struct inode *inode, struct file *file)
+{
+ file->private_data = NULL;
+ return nonseekable_open(inode, file);
+}
+
+static size_t format_array(char *buf, size_t bufsize, const char *fmt,
+ u32 *array, unsigned array_size)
+{
+ size_t ret = 0;
+ unsigned i;
+
+ for(i = 0; i < array_size; i++) {
+ size_t len;
+
+ len = snprintf(buf, bufsize, fmt, array[i]);
+ len++; /* ' ' or '\n' */
+ ret += len;
+
+ if (buf) {
+ buf += len;
+ bufsize -= len;
+ buf[-1] = (i == array_size-1) ? '\n' : ' ';
+ }
+ }
+
+ ret++; /* \0 */
+ if (buf)
+ *buf = '\0';
+
+ return ret;
+}
+
+static char *format_array_alloc(const char *fmt, u32 *array, unsigned array_size)
+{
+ size_t len = format_array(NULL, 0, fmt, array, array_size);
+ char *ret;
+
+ ret = kmalloc(len, GFP_KERNEL);
+ if (ret == NULL)
+ return NULL;
+
+ format_array(ret, len, fmt, array, array_size);
+ return ret;
+}
+
+static ssize_t u32_array_read(struct file *file, char __user *buf, size_t len,
+ loff_t *ppos)
+{
+ struct inode *inode = file->f_path.dentry->d_inode;
+ struct array_data *data = inode->i_private;
+ size_t size;
+
+ if (*ppos == 0) {
+ if (file->private_data) {
+ kfree(file->private_data);
+ file->private_data = NULL;
+ }
+
+ file->private_data = format_array_alloc("%u", data->array, data->elements);
+ }
+
+ size = 0;
+ if (file->private_data)
+ size = strlen(file->private_data);
+
+ return simple_read_from_buffer(buf, len, ppos, file->private_data, size);
+}
+
+static int xen_array_release(struct inode *inode, struct file *file)
+{
+ kfree(file->private_data);
+
+ return 0;
+}
+
+static struct file_operations u32_array_fops = {
+ .owner = THIS_MODULE,
+ .open = u32_array_open,
+ .release= xen_array_release,
+ .read = u32_array_read,
+};
+
+struct dentry *xen_debugfs_create_u32_array(const char *name, mode_t mode,
+ struct dentry *parent,
+ u32 *array, unsigned elements)
+{
+ struct array_data *data = kmalloc(sizeof(*data), GFP_KERNEL);
+
+ if (data == NULL)
+ return NULL;
+
+ data->array = array;
+ data->elements = elements;
+
+ return debugfs_create_file(name, mode, parent, data, &u32_array_fops);
+}
diff --git a/arch/x86/xen/debugfs.h b/arch/x86/xen/debugfs.h
new file mode 100644
index 0000000..e281320
--- /dev/null
+++ b/arch/x86/xen/debugfs.h
@@ -0,0 +1,10 @@
+#ifndef _XEN_DEBUGFS_H
+#define _XEN_DEBUGFS_H
+
+struct dentry * __init xen_init_debugfs(void);
+
+struct dentry *xen_debugfs_create_u32_array(const char *name, mode_t mode,
+ struct dentry *parent,
+ u32 *array, unsigned elements);
+
+#endif /* _XEN_DEBUGFS_H */
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index a27d562..708b8ea 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -30,7 +30,6 @@
#include <xen/interface/xen.h>
#include <xen/interface/physdev.h>
#include <xen/interface/vcpu.h>
-#include <xen/interface/sched.h>
#include <xen/features.h>
#include <xen/page.h>
#include <xen/hvc-console.h>
@@ -58,6 +57,9 @@ EXPORT_SYMBOL_GPL(hypercall_page);
DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu);
DEFINE_PER_CPU(struct vcpu_info, xen_vcpu_info);
+enum xen_domain_type xen_domain_type = XEN_NATIVE;
+EXPORT_SYMBOL_GPL(xen_domain_type);
+
/*
* Identity map, in addition to plain kernel map. This needs to be
* large enough to allocate page table pages to allocate the rest.
@@ -227,103 +229,68 @@ static unsigned long xen_get_debugreg(int reg)
return HYPERVISOR_get_debugreg(reg);
}
-static unsigned long xen_save_fl(void)
+static void xen_leave_lazy(void)
{
- struct vcpu_info *vcpu;
- unsigned long flags;
-
- vcpu = x86_read_percpu(xen_vcpu);
-
- /* flag has opposite sense of mask */
- flags = !vcpu->evtchn_upcall_mask;
-
- /* convert to IF type flag
- -0 -> 0x00000000
- -1 -> 0xffffffff
- */
- return (-flags) & X86_EFLAGS_IF;
+ paravirt_leave_lazy(paravirt_get_lazy_mode());
+ xen_mc_flush();
}
-static void xen_restore_fl(unsigned long flags)
+static unsigned long xen_store_tr(void)
{
- struct vcpu_info *vcpu;
-
- /* convert from IF type flag */
- flags = !(flags & X86_EFLAGS_IF);
-
- /* There's a one instruction preempt window here. We need to
- make sure we're don't switch CPUs between getting the vcpu
- pointer and updating the mask. */
- preempt_disable();
- vcpu = x86_read_percpu(xen_vcpu);
- vcpu->evtchn_upcall_mask = flags;
- preempt_enable_no_resched();
-
- /* Doesn't matter if we get preempted here, because any
- pending event will get dealt with anyway. */
-
- if (flags == 0) {
- preempt_check_resched();
- barrier(); /* unmask then check (avoid races) */
- if (unlikely(vcpu->evtchn_upcall_pending))
- force_evtchn_callback();
- }
+ return 0;
}
-static void xen_irq_disable(void)
+/*
+ * Set the page permissions for a particular virtual address. If the
+ * address is a vmalloc mapping (or other non-linear mapping), then
+ * find the linear mapping of the page and also set its protections to
+ * match.
+ */
+static void set_aliased_prot(void *v, pgprot_t prot)
{
- /* There's a one instruction preempt window here. We need to
- make sure we're don't switch CPUs between getting the vcpu
- pointer and updating the mask. */
- preempt_disable();
- x86_read_percpu(xen_vcpu)->evtchn_upcall_mask = 1;
- preempt_enable_no_resched();
-}
+ int level;
+ pte_t *ptep;
+ pte_t pte;
+ unsigned long pfn;
+ struct page *page;
-static void xen_irq_enable(void)
-{
- struct vcpu_info *vcpu;
+ ptep = lookup_address((unsigned long)v, &level);
+ BUG_ON(ptep == NULL);
- /* We don't need to worry about being preempted here, since
- either a) interrupts are disabled, so no preemption, or b)
- the caller is confused and is trying to re-enable interrupts
- on an indeterminate processor. */
+ pfn = pte_pfn(*ptep);
+ page = pfn_to_page(pfn);
- vcpu = x86_read_percpu(xen_vcpu);
- vcpu->evtchn_upcall_mask = 0;
+ pte = pfn_pte(pfn, prot);
- /* Doesn't matter if we get preempted here, because any
- pending event will get dealt with anyway. */
+ if (HYPERVISOR_update_va_mapping((unsigned long)v, pte, 0))
+ BUG();
- barrier(); /* unmask then check (avoid races) */
- if (unlikely(vcpu->evtchn_upcall_pending))
- force_evtchn_callback();
-}
+ if (!PageHighMem(page)) {
+ void *av = __va(PFN_PHYS(pfn));
-static void xen_safe_halt(void)
-{
- /* Blocking includes an implicit local_irq_enable(). */
- if (HYPERVISOR_sched_op(SCHEDOP_block, NULL) != 0)
- BUG();
+ if (av != v)
+ if (HYPERVISOR_update_va_mapping((unsigned long)av, pte, 0))
+ BUG();
+ } else
+ kmap_flush_unused();
}
-static void xen_halt(void)
+static void xen_alloc_ldt(struct desc_struct *ldt, unsigned entries)
{
- if (irqs_disabled())
- HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
- else
- xen_safe_halt();
-}
+ const unsigned entries_per_page = PAGE_SIZE / LDT_ENTRY_SIZE;
+ int i;
-static void xen_leave_lazy(void)
-{
- paravirt_leave_lazy(paravirt_get_lazy_mode());
- xen_mc_flush();
+ for(i = 0; i < entries; i += entries_per_page)
+ set_aliased_prot(ldt + i, PAGE_KERNEL_RO);
}
-static unsigned long xen_store_tr(void)
+static void xen_free_ldt(struct desc_struct *ldt, unsigned entries)
{
- return 0;
+ const unsigned entries_per_page = PAGE_SIZE / LDT_ENTRY_SIZE;
+ int i;
+
+ for(i = 0; i < entries; i += entries_per_page)
+ set_aliased_prot(ldt + i, PAGE_KERNEL);
}
static void xen_set_ldt(const void *addr, unsigned entries)
@@ -426,8 +393,7 @@ static void xen_load_gs_index(unsigned int idx)
static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
const void *ptr)
{
- unsigned long lp = (unsigned long)&dt[entrynum];
- xmaddr_t mach_lp = virt_to_machine(lp);
+ xmaddr_t mach_lp = arbitrary_virt_to_machine(&dt[entrynum]);
u64 entry = *(u64 *)ptr;
preempt_disable();
@@ -560,7 +526,7 @@ static void xen_write_gdt_entry(struct desc_struct *dt, int entry,
}
static void xen_load_sp0(struct tss_struct *tss,
- struct thread_struct *thread)
+ struct thread_struct *thread)
{
struct multicall_space mcs = xen_mc_entry(0);
MULTI_stack_switch(mcs.mc, __KERNEL_DS, thread->sp0);
@@ -835,6 +801,19 @@ static int xen_write_msr_safe(unsigned int msr, unsigned low, unsigned high)
ret = -EFAULT;
break;
#endif
+
+ case MSR_STAR:
+ case MSR_CSTAR:
+ case MSR_LSTAR:
+ case MSR_SYSCALL_MASK:
+ case MSR_IA32_SYSENTER_CS:
+ case MSR_IA32_SYSENTER_ESP:
+ case MSR_IA32_SYSENTER_EIP:
+ /* Fast syscall setup is all done in hypercalls, so
+ these are all ignored. Stub them out here to stop
+ Xen console noise. */
+ break;
+
default:
ret = native_write_msr_safe(msr, low, high);
}
@@ -878,8 +857,8 @@ static void xen_alloc_ptpage(struct mm_struct *mm, unsigned long pfn, unsigned l
SetPagePinned(page);
if (!PageHighMem(page)) {
- make_lowmem_page_readonly(__va(PFN_PHYS(pfn)));
- if (level == PT_PTE)
+ make_lowmem_page_readonly(__va(PFN_PHYS((unsigned long)pfn)));
+ if (level == PT_PTE && USE_SPLIT_PTLOCKS)
pin_pagetable_pfn(MMUEXT_PIN_L1_TABLE, pfn);
} else
/* make sure there are no stray mappings of
@@ -947,7 +926,7 @@ static void xen_release_ptpage(unsigned long pfn, unsigned level)
if (PagePinned(page)) {
if (!PageHighMem(page)) {
- if (level == PT_PTE)
+ if (level == PT_PTE && USE_SPLIT_PTLOCKS)
pin_pagetable_pfn(MMUEXT_UNPIN_TABLE, pfn);
make_lowmem_page_readwrite(__va(PFN_PHYS(pfn)));
}
@@ -1252,6 +1231,9 @@ static const struct pv_cpu_ops xen_cpu_ops __initdata = {
.load_gs_index = xen_load_gs_index,
#endif
+ .alloc_ldt = xen_alloc_ldt,
+ .free_ldt = xen_free_ldt,
+
.store_gdt = native_store_gdt,
.store_idt = native_store_idt,
.store_tr = xen_store_tr,
@@ -1273,36 +1255,6 @@ static const struct pv_cpu_ops xen_cpu_ops __initdata = {
},
};
-static void __init __xen_init_IRQ(void)
-{
-#ifdef CONFIG_X86_64
- int i;
-
- /* Create identity vector->irq map */
- for(i = 0; i < NR_VECTORS; i++) {
- int cpu;
-
- for_each_possible_cpu(cpu)
- per_cpu(vector_irq, cpu)[i] = i;
- }
-#endif /* CONFIG_X86_64 */
-
- xen_init_IRQ();
-}
-
-static const struct pv_irq_ops xen_irq_ops __initdata = {
- .init_IRQ = __xen_init_IRQ,
- .save_fl = xen_save_fl,
- .restore_fl = xen_restore_fl,
- .irq_disable = xen_irq_disable,
- .irq_enable = xen_irq_enable,
- .safe_halt = xen_safe_halt,
- .halt = xen_halt,
-#ifdef CONFIG_X86_64
- .adjust_exception_frame = xen_adjust_exception_frame,
-#endif
-};
-
static const struct pv_apic_ops xen_apic_ops __initdata = {
#ifdef CONFIG_X86_LOCAL_APIC
.setup_boot_clock = paravirt_nop,
@@ -1694,6 +1646,8 @@ asmlinkage void __init xen_start_kernel(void)
if (!xen_start_info)
return;
+ xen_domain_type = XEN_PV_DOMAIN;
+
BUG_ON(memcmp(xen_start_info->magic, "xen-3", 5) != 0);
xen_setup_features();
@@ -1703,10 +1657,11 @@ asmlinkage void __init xen_start_kernel(void)
pv_init_ops = xen_init_ops;
pv_time_ops = xen_time_ops;
pv_cpu_ops = xen_cpu_ops;
- pv_irq_ops = xen_irq_ops;
pv_apic_ops = xen_apic_ops;
pv_mmu_ops = xen_mmu_ops;
+ xen_init_irq_ops();
+
#ifdef CONFIG_X86_LOCAL_APIC
/*
* set up the basic apic ops.
@@ -1737,7 +1692,7 @@ asmlinkage void __init xen_start_kernel(void)
/* Prevent unwanted bits from being set in PTEs. */
__supported_pte_mask &= ~_PAGE_GLOBAL;
- if (!is_initial_xendomain())
+ if (!xen_initial_domain())
__supported_pte_mask &= ~(_PAGE_PWT | _PAGE_PCD);
/* Don't do the full vcpu_info placement stuff until we have a
@@ -1772,7 +1727,7 @@ asmlinkage void __init xen_start_kernel(void)
boot_params.hdr.ramdisk_size = xen_start_info->mod_len;
boot_params.hdr.cmd_line_ptr = __pa(xen_start_info->cmd_line);
- if (!is_initial_xendomain()) {
+ if (!xen_initial_domain()) {
add_preferred_console("xenboot", 0, NULL);
add_preferred_console("tty", 0, NULL);
add_preferred_console("hvc", 0, NULL);
diff --git a/arch/x86/xen/irq.c b/arch/x86/xen/irq.c
new file mode 100644
index 0000000..28b85ab
--- /dev/null
+++ b/arch/x86/xen/irq.c
@@ -0,0 +1,143 @@
+#include <linux/hardirq.h>
+
+#include <xen/interface/xen.h>
+#include <xen/interface/sched.h>
+#include <xen/interface/vcpu.h>
+
+#include <asm/xen/hypercall.h>
+#include <asm/xen/hypervisor.h>
+
+#include "xen-ops.h"
+
+/*
+ * Force a proper event-channel callback from Xen after clearing the
+ * callback mask. We do this in a very simple manner, by making a call
+ * down into Xen. The pending flag will be checked by Xen on return.
+ */
+void xen_force_evtchn_callback(void)
+{
+ (void)HYPERVISOR_xen_version(0, NULL);
+}
+
+static void __init __xen_init_IRQ(void)
+{
+#ifdef CONFIG_X86_64
+ int i;
+
+ /* Create identity vector->irq map */
+ for(i = 0; i < NR_VECTORS; i++) {
+ int cpu;
+
+ for_each_possible_cpu(cpu)
+ per_cpu(vector_irq, cpu)[i] = i;
+ }
+#endif /* CONFIG_X86_64 */
+
+ xen_init_IRQ();
+}
+
+static unsigned long xen_save_fl(void)
+{
+ struct vcpu_info *vcpu;
+ unsigned long flags;
+
+ vcpu = x86_read_percpu(xen_vcpu);
+
+ /* flag has opposite sense of mask */
+ flags = !vcpu->evtchn_upcall_mask;
+
+ /* convert to IF type flag
+ -0 -> 0x00000000
+ -1 -> 0xffffffff
+ */
+ return (-flags) & X86_EFLAGS_IF;
+}
+
+static void xen_restore_fl(unsigned long flags)
+{
+ struct vcpu_info *vcpu;
+
+ /* convert from IF type flag */
+ flags = !(flags & X86_EFLAGS_IF);
+
+ /* There's a one instruction preempt window here. We need to
+ make sure we're don't switch CPUs between getting the vcpu
+ pointer and updating the mask. */
+ preempt_disable();
+ vcpu = x86_read_percpu(xen_vcpu);
+ vcpu->evtchn_upcall_mask = flags;
+ preempt_enable_no_resched();
+
+ /* Doesn't matter if we get preempted here, because any
+ pending event will get dealt with anyway. */
+
+ if (flags == 0) {
+ preempt_check_resched();
+ barrier(); /* unmask then check (avoid races) */
+ if (unlikely(vcpu->evtchn_upcall_pending))
+ xen_force_evtchn_callback();
+ }
+}
+
+static void xen_irq_disable(void)
+{
+ /* There's a one instruction preempt window here. We need to
+ make sure we're don't switch CPUs between getting the vcpu
+ pointer and updating the mask. */
+ preempt_disable();
+ x86_read_percpu(xen_vcpu)->evtchn_upcall_mask = 1;
+ preempt_enable_no_resched();
+}
+
+static void xen_irq_enable(void)
+{
+ struct vcpu_info *vcpu;
+
+ /* We don't need to worry about being preempted here, since
+ either a) interrupts are disabled, so no preemption, or b)
+ the caller is confused and is trying to re-enable interrupts
+ on an indeterminate processor. */
+
+ vcpu = x86_read_percpu(xen_vcpu);
+ vcpu->evtchn_upcall_mask = 0;
+
+ /* Doesn't matter if we get preempted here, because any
+ pending event will get dealt with anyway. */
+
+ barrier(); /* unmask then check (avoid races) */
+ if (unlikely(vcpu->evtchn_upcall_pending))
+ xen_force_evtchn_callback();
+}
+
+static void xen_safe_halt(void)
+{
+ /* Blocking includes an implicit local_irq_enable(). */
+ if (HYPERVISOR_sched_op(SCHEDOP_block, NULL) != 0)
+ BUG();
+}
+
+static void xen_halt(void)
+{
+ if (irqs_disabled())
+ HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
+ else
+ xen_safe_halt();
+}
+
+static const struct pv_irq_ops xen_irq_ops __initdata = {
+ .init_IRQ = __xen_init_IRQ,
+ .save_fl = xen_save_fl,
+ .restore_fl = xen_restore_fl,
+ .irq_disable = xen_irq_disable,
+ .irq_enable = xen_irq_enable,
+ .safe_halt = xen_safe_halt,
+ .halt = xen_halt,
+#ifdef CONFIG_X86_64
+ .adjust_exception_frame = xen_adjust_exception_frame,
+#endif
+};
+
+void __init xen_init_irq_ops()
+{
+ pv_irq_ops = xen_irq_ops;
+}
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index aa37469..64e5868 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -40,6 +40,7 @@
*/
#include <linux/sched.h>
#include <linux/highmem.h>
+#include <linux/debugfs.h>
#include <linux/bug.h>
#include <asm/pgtable.h>
@@ -57,6 +58,61 @@
#include "multicalls.h"
#include "mmu.h"
+#include "debugfs.h"
+
+#define MMU_UPDATE_HISTO 30
+
+#ifdef CONFIG_XEN_DEBUG_FS
+
+static struct {
+ u32 pgd_update;
+ u32 pgd_update_pinned;
+ u32 pgd_update_batched;
+
+ u32 pud_update;
+ u32 pud_update_pinned;
+ u32 pud_update_batched;
+
+ u32 pmd_update;
+ u32 pmd_update_pinned;
+ u32 pmd_update_batched;
+
+ u32 pte_update;
+ u32 pte_update_pinned;
+ u32 pte_update_batched;
+
+ u32 mmu_update;
+ u32 mmu_update_extended;
+ u32 mmu_update_histo[MMU_UPDATE_HISTO];
+
+ u32 prot_commit;
+ u32 prot_commit_batched;
+
+ u32 set_pte_at;
+ u32 set_pte_at_batched;
+ u32 set_pte_at_pinned;
+ u32 set_pte_at_current;
+ u32 set_pte_at_kernel;
+} mmu_stats;
+
+static u8 zero_stats;
+
+static inline void check_zero(void)
+{
+ if (unlikely(zero_stats)) {
+ memset(&mmu_stats, 0, sizeof(mmu_stats));
+ zero_stats = 0;
+ }
+}
+
+#define ADD_STATS(elem, val) \
+ do { check_zero(); mmu_stats.elem += (val); } while(0)
+
+#else /* !CONFIG_XEN_DEBUG_FS */
+
+#define ADD_STATS(elem, val) do { (void)(val); } while(0)
+
+#endif /* CONFIG_XEN_DEBUG_FS */
/*
* Just beyond the highest usermode address. STACK_TOP_MAX has a
@@ -229,25 +285,35 @@ void make_lowmem_page_readwrite(void *vaddr)
}
-static bool page_pinned(void *ptr)
+static bool xen_page_pinned(void *ptr)
{
struct page *page = virt_to_page(ptr);
return PagePinned(page);
}
-static void extend_mmu_update(const struct mmu_update *update)
+static void xen_extend_mmu_update(const struct mmu_update *update)
{
struct multicall_space mcs;
struct mmu_update *u;
mcs = xen_mc_extend_args(__HYPERVISOR_mmu_update, sizeof(*u));
- if (mcs.mc != NULL)
+ if (mcs.mc != NULL) {
+ ADD_STATS(mmu_update_extended, 1);
+ ADD_STATS(mmu_update_histo[mcs.mc->args[1]], -1);
+
mcs.mc->args[1]++;
- else {
+
+ if (mcs.mc->args[1] < MMU_UPDATE_HISTO)
+ ADD_STATS(mmu_update_histo[mcs.mc->args[1]], 1);
+ else
+ ADD_STATS(mmu_update_histo[0], 1);
+ } else {
+ ADD_STATS(mmu_update, 1);
mcs = __xen_mc_entry(sizeof(*u));
MULTI_mmu_update(mcs.mc, mcs.args, 1, NULL, DOMID_SELF);
+ ADD_STATS(mmu_update_histo[1], 1);
}
u = mcs.args;
@@ -265,7 +331,9 @@ void xen_set_pmd_hyper(pmd_t *ptr, pmd_t val)
/* ptr may be ioremapped for 64-bit pagetable setup */
u.ptr = arbitrary_virt_to_machine(ptr).maddr;
u.val = pmd_val_ma(val);
- extend_mmu_update(&u);
+ xen_extend_mmu_update(&u);
+
+ ADD_STATS(pmd_update_batched, paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU);
xen_mc_issue(PARAVIRT_LAZY_MMU);
@@ -274,13 +342,17 @@ void xen_set_pmd_hyper(pmd_t *ptr, pmd_t val)
void xen_set_pmd(pmd_t *ptr, pmd_t val)
{
+ ADD_STATS(pmd_update, 1);
+
/* If page is not pinned, we can just update the entry
directly */
- if (!page_pinned(ptr)) {
+ if (!xen_page_pinned(ptr)) {
*ptr = val;
return;
}
+ ADD_STATS(pmd_update_pinned, 1);
+
xen_set_pmd_hyper(ptr, val);
}
@@ -300,12 +372,18 @@ void xen_set_pte_at(struct mm_struct *mm, unsigned long addr,
if (mm == &init_mm)
preempt_disable();
+ ADD_STATS(set_pte_at, 1);
+// ADD_STATS(set_pte_at_pinned, xen_page_pinned(ptep));
+ ADD_STATS(set_pte_at_current, mm == current->mm);
+ ADD_STATS(set_pte_at_kernel, mm == &init_mm);
+
if (mm == current->mm || mm == &init_mm) {
if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU) {
struct multicall_space mcs;
mcs = xen_mc_entry(0);
MULTI_update_va_mapping(mcs.mc, addr, pteval, 0);
+ ADD_STATS(set_pte_at_batched, 1);
xen_mc_issue(PARAVIRT_LAZY_MMU);
goto out;
} else
@@ -334,7 +412,10 @@ void xen_ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr,
u.ptr = virt_to_machine(ptep).maddr | MMU_PT_UPDATE_PRESERVE_AD;
u.val = pte_val_ma(pte);
- extend_mmu_update(&u);
+ xen_extend_mmu_update(&u);
+
+ ADD_STATS(prot_commit, 1);
+ ADD_STATS(prot_commit_batched, paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU);
xen_mc_issue(PARAVIRT_LAZY_MMU);
}
@@ -400,7 +481,9 @@ void xen_set_pud_hyper(pud_t *ptr, pud_t val)
/* ptr may be ioremapped for 64-bit pagetable setup */
u.ptr = arbitrary_virt_to_machine(ptr).maddr;
u.val = pud_val_ma(val);
- extend_mmu_update(&u);
+ xen_extend_mmu_update(&u);
+
+ ADD_STATS(pud_update_batched, paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU);
xen_mc_issue(PARAVIRT_LAZY_MMU);
@@ -409,18 +492,26 @@ void xen_set_pud_hyper(pud_t *ptr, pud_t val)
void xen_set_pud(pud_t *ptr, pud_t val)
{
+ ADD_STATS(pud_update, 1);
+
/* If page is not pinned, we can just update the entry
directly */
- if (!page_pinned(ptr)) {
+ if (!xen_page_pinned(ptr)) {
*ptr = val;
return;
}
+ ADD_STATS(pud_update_pinned, 1);
+
xen_set_pud_hyper(ptr, val);
}
void xen_set_pte(pte_t *ptep, pte_t pte)
{
+ ADD_STATS(pte_update, 1);
+// ADD_STATS(pte_update_pinned, xen_page_pinned(ptep));
+ ADD_STATS(pte_update_batched, paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU);
+
#ifdef CONFIG_X86_PAE
ptep->pte_high = pte.pte_high;
smp_wmb();
@@ -490,7 +581,7 @@ static void __xen_set_pgd_hyper(pgd_t *ptr, pgd_t val)
u.ptr = virt_to_machine(ptr).maddr;
u.val = pgd_val_ma(val);
- extend_mmu_update(&u);
+ xen_extend_mmu_update(&u);
}
/*
@@ -517,17 +608,22 @@ void xen_set_pgd(pgd_t *ptr, pgd_t val)
{
pgd_t *user_ptr = xen_get_user_pgd(ptr);
+ ADD_STATS(pgd_update, 1);
+
/* If page is not pinned, we can just update the entry
directly */
- if (!page_pinned(ptr)) {
+ if (!xen_page_pinned(ptr)) {
*ptr = val;
if (user_ptr) {
- WARN_ON(page_pinned(user_ptr));
+ WARN_ON(xen_page_pinned(user_ptr));
*user_ptr = val;
}
return;
}
+ ADD_STATS(pgd_update_pinned, 1);
+ ADD_STATS(pgd_update_batched, paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU);
+
/* If it's pinned, then we can at least batch the kernel and
user updates together. */
xen_mc_batch();
@@ -555,8 +651,8 @@ void xen_set_pgd(pgd_t *ptr, pgd_t val)
* For 64-bit, we must skip the Xen hole in the middle of the address
* space, just after the big x86-64 virtual hole.
*/
-static int pgd_walk(pgd_t *pgd, int (*func)(struct page *, enum pt_level),
- unsigned long limit)
+static int xen_pgd_walk(pgd_t *pgd, int (*func)(struct page *, enum pt_level),
+ unsigned long limit)
{
int flush = 0;
unsigned hole_low, hole_high;
@@ -590,8 +686,6 @@ static int pgd_walk(pgd_t *pgd, int (*func)(struct page *, enum pt_level),
pmdidx_limit = 0;
#endif
- flush |= (*func)(virt_to_page(pgd), PT_PGD);
-
for (pgdidx = 0; pgdidx <= pgdidx_limit; pgdidx++) {
pud_t *pud;
@@ -637,16 +731,22 @@ static int pgd_walk(pgd_t *pgd, int (*func)(struct page *, enum pt_level),
}
}
}
+
out:
+ /* Do the top level last, so that the callbacks can use it as
+ a cue to do final things like tlb flushes. */
+ flush |= (*func)(virt_to_page(pgd), PT_PGD);
return flush;
}
-static spinlock_t *lock_pte(struct page *page)
+/* If we're using split pte locks, then take the page's lock and
+ return a pointer to it. Otherwise return NULL. */
+static spinlock_t *xen_pte_lock(struct page *page)
{
spinlock_t *ptl = NULL;
-#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
+#if USE_SPLIT_PTLOCKS
ptl = __pte_lockptr(page);
spin_lock(ptl);
#endif
@@ -654,7 +754,7 @@ static spinlock_t *lock_pte(struct page *page)
return ptl;
}
-static void do_unlock(void *v)
+static void xen_pte_unlock(void *v)
{
spinlock_t *ptl = v;
spin_unlock(ptl);
@@ -672,7 +772,7 @@ static void xen_do_pin(unsigned level, unsigned long pfn)
MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF);
}
-static int pin_page(struct page *page, enum pt_level level)
+static int xen_pin_page(struct page *page, enum pt_level level)
{
unsigned pgfl = TestSetPagePinned(page);
int flush;
@@ -691,21 +791,40 @@ static int pin_page(struct page *page, enum pt_level level)
flush = 0;
+ /*
+ * We need to hold the pagetable lock between the time
+ * we make the pagetable RO and when we actually pin
+ * it. If we don't, then other users may come in and
+ * attempt to update the pagetable by writing it,
+ * which will fail because the memory is RO but not
+ * pinned, so Xen won't do the trap'n'emulate.
+ *
+ * If we're using split pte locks, we can't hold the
+ * entire pagetable's worth of locks during the
+ * traverse, because we may wrap the preempt count (8
+ * bits). The solution is to mark RO and pin each PTE
+ * page while holding the lock. This means the number
+ * of locks we end up holding is never more than a
+ * batch size (~32 entries, at present).
+ *
+ * If we're not using split pte locks, we needn't pin
+ * the PTE pages independently, because we're
+ * protected by the overall pagetable lock.
+ */
ptl = NULL;
if (level == PT_PTE)
- ptl = lock_pte(page);
+ ptl = xen_pte_lock(page);
MULTI_update_va_mapping(mcs.mc, (unsigned long)pt,
pfn_pte(pfn, PAGE_KERNEL_RO),
level == PT_PGD ? UVMF_TLB_FLUSH : 0);
- if (level == PT_PTE)
+ if (ptl) {
xen_do_pin(MMUEXT_PIN_L1_TABLE, pfn);
- if (ptl) {
/* Queue a deferred unlock for when this batch
is completed. */
- xen_mc_callback(do_unlock, ptl);
+ xen_mc_callback(xen_pte_unlock, ptl);
}
}
@@ -719,7 +838,7 @@ void xen_pgd_pin(pgd_t *pgd)
{
xen_mc_batch();
- if (pgd_walk(pgd, pin_page, USER_LIMIT)) {
+ if (xen_pgd_walk(pgd, xen_pin_page, USER_LIMIT)) {
/* re-enable interrupts for kmap_flush_unused */
xen_mc_issue(0);
kmap_flush_unused();
@@ -733,14 +852,14 @@ void xen_pgd_pin(pgd_t *pgd)
xen_do_pin(MMUEXT_PIN_L4_TABLE, PFN_DOWN(__pa(pgd)));
if (user_pgd) {
- pin_page(virt_to_page(user_pgd), PT_PGD);
+ xen_pin_page(virt_to_page(user_pgd), PT_PGD);
xen_do_pin(MMUEXT_PIN_L4_TABLE, PFN_DOWN(__pa(user_pgd)));
}
}
#else /* CONFIG_X86_32 */
#ifdef CONFIG_X86_PAE
/* Need to make sure unshared kernel PMD is pinnable */
- pin_page(virt_to_page(pgd_page(pgd[pgd_index(TASK_SIZE)])), PT_PMD);
+ xen_pin_page(virt_to_page(pgd_page(pgd[pgd_index(TASK_SIZE)])), PT_PMD);
#endif
xen_do_pin(MMUEXT_PIN_L3_TABLE, PFN_DOWN(__pa(pgd)));
#endif /* CONFIG_X86_64 */
@@ -775,7 +894,7 @@ void xen_mm_pin_all(void)
* that's before we have page structures to store the bits. So do all
* the book-keeping now.
*/
-static __init int mark_pinned(struct page *page, enum pt_level level)
+static __init int xen_mark_pinned(struct page *page, enum pt_level level)
{
SetPagePinned(page);
return 0;
@@ -783,10 +902,10 @@ static __init int mark_pinned(struct page *page, enum pt_level level)
void __init xen_mark_init_mm_pinned(void)
{
- pgd_walk(init_mm.pgd, mark_pinned, FIXADDR_TOP);
+ xen_pgd_walk(init_mm.pgd, xen_mark_pinned, FIXADDR_TOP);
}
-static int unpin_page(struct page *page, enum pt_level level)
+static int xen_unpin_page(struct page *page, enum pt_level level)
{
unsigned pgfl = TestClearPagePinned(page);
@@ -796,10 +915,18 @@ static int unpin_page(struct page *page, enum pt_level level)
spinlock_t *ptl = NULL;
struct multicall_space mcs;
+ /*
+ * Do the converse to pin_page. If we're using split
+ * pte locks, we must be holding the lock for while
+ * the pte page is unpinned but still RO to prevent
+ * concurrent updates from seeing it in this
+ * partially-pinned state.
+ */
if (level == PT_PTE) {
- ptl = lock_pte(page);
+ ptl = xen_pte_lock(page);
- xen_do_pin(MMUEXT_UNPIN_TABLE, pfn);
+ if (ptl)
+ xen_do_pin(MMUEXT_UNPIN_TABLE, pfn);
}
mcs = __xen_mc_entry(0);
@@ -810,7 +937,7 @@ static int unpin_page(struct page *page, enum pt_level level)
if (ptl) {
/* unlock when batch completed */
- xen_mc_callback(do_unlock, ptl);
+ xen_mc_callback(xen_pte_unlock, ptl);
}
}
@@ -830,17 +957,17 @@ static void xen_pgd_unpin(pgd_t *pgd)
if (user_pgd) {
xen_do_pin(MMUEXT_UNPIN_TABLE, PFN_DOWN(__pa(user_pgd)));
- unpin_page(virt_to_page(user_pgd), PT_PGD);
+ xen_unpin_page(virt_to_page(user_pgd), PT_PGD);
}
}
#endif
#ifdef CONFIG_X86_PAE
/* Need to make sure unshared kernel PMD is unpinned */
- pin_page(virt_to_page(pgd_page(pgd[pgd_index(TASK_SIZE)])), PT_PMD);
+ xen_unpin_page(virt_to_page(pgd_page(pgd[pgd_index(TASK_SIZE)])), PT_PMD);
#endif
- pgd_walk(pgd, unpin_page, USER_LIMIT);
+ xen_pgd_walk(pgd, xen_unpin_page, USER_LIMIT);
xen_mc_issue(0);
}
@@ -907,7 +1034,7 @@ static void drop_other_mm_ref(void *info)
}
}
-static void drop_mm_ref(struct mm_struct *mm)
+static void xen_drop_mm_ref(struct mm_struct *mm)
{
cpumask_t mask;
unsigned cpu;
@@ -937,7 +1064,7 @@ static void drop_mm_ref(struct mm_struct *mm)
smp_call_function_mask(mask, drop_other_mm_ref, mm, 1);
}
#else
-static void drop_mm_ref(struct mm_struct *mm)
+static void xen_drop_mm_ref(struct mm_struct *mm)
{
if (current->active_mm == mm)
load_cr3(swapper_pg_dir);
@@ -961,14 +1088,77 @@ static void drop_mm_ref(struct mm_struct *mm)
void xen_exit_mmap(struct mm_struct *mm)
{
get_cpu(); /* make sure we don't move around */
- drop_mm_ref(mm);
+ xen_drop_mm_ref(mm);
put_cpu();
spin_lock(&mm->page_table_lock);
/* pgd may not be pinned in the error exit path of execve */
- if (page_pinned(mm->pgd))
+ if (xen_page_pinned(mm->pgd))
xen_pgd_unpin(mm->pgd);
spin_unlock(&mm->page_table_lock);
}
+
+#ifdef CONFIG_XEN_DEBUG_FS
+
+static struct dentry *d_mmu_debug;
+
+static int __init xen_mmu_debugfs(void)
+{
+ struct dentry *d_xen = xen_init_debugfs();
+
+ if (d_xen == NULL)
+ return -ENOMEM;
+
+ d_mmu_debug = debugfs_create_dir("mmu", d_xen);
+
+ debugfs_create_u8("zero_stats", 0644, d_mmu_debug, &zero_stats);
+
+ debugfs_create_u32("pgd_update", 0444, d_mmu_debug, &mmu_stats.pgd_update);
+ debugfs_create_u32("pgd_update_pinned", 0444, d_mmu_debug,
+ &mmu_stats.pgd_update_pinned);
+ debugfs_create_u32("pgd_update_batched", 0444, d_mmu_debug,
+ &mmu_stats.pgd_update_pinned);
+
+ debugfs_create_u32("pud_update", 0444, d_mmu_debug, &mmu_stats.pud_update);
+ debugfs_create_u32("pud_update_pinned", 0444, d_mmu_debug,
+ &mmu_stats.pud_update_pinned);
+ debugfs_create_u32("pud_update_batched", 0444, d_mmu_debug,
+ &mmu_stats.pud_update_pinned);
+
+ debugfs_create_u32("pmd_update", 0444, d_mmu_debug, &mmu_stats.pmd_update);
+ debugfs_create_u32("pmd_update_pinned", 0444, d_mmu_debug,
+ &mmu_stats.pmd_update_pinned);
+ debugfs_create_u32("pmd_update_batched", 0444, d_mmu_debug,
+ &mmu_stats.pmd_update_pinned);
+
+ debugfs_create_u32("pte_update", 0444, d_mmu_debug, &mmu_stats.pte_update);
+// debugfs_create_u32("pte_update_pinned", 0444, d_mmu_debug,
+// &mmu_stats.pte_update_pinned);
+ debugfs_create_u32("pte_update_batched", 0444, d_mmu_debug,
+ &mmu_stats.pte_update_pinned);
+
+ debugfs_create_u32("mmu_update", 0444, d_mmu_debug, &mmu_stats.mmu_update);
+ debugfs_create_u32("mmu_update_extended", 0444, d_mmu_debug,
+ &mmu_stats.mmu_update_extended);
+ xen_debugfs_create_u32_array("mmu_update_histo", 0444, d_mmu_debug,
+ mmu_stats.mmu_update_histo, 20);
+
+ debugfs_create_u32("set_pte_at", 0444, d_mmu_debug, &mmu_stats.set_pte_at);
+ debugfs_create_u32("set_pte_at_batched", 0444, d_mmu_debug,
+ &mmu_stats.set_pte_at_batched);
+ debugfs_create_u32("set_pte_at_current", 0444, d_mmu_debug,
+ &mmu_stats.set_pte_at_current);
+ debugfs_create_u32("set_pte_at_kernel", 0444, d_mmu_debug,
+ &mmu_stats.set_pte_at_kernel);
+
+ debugfs_create_u32("prot_commit", 0444, d_mmu_debug, &mmu_stats.prot_commit);
+ debugfs_create_u32("prot_commit_batched", 0444, d_mmu_debug,
+ &mmu_stats.prot_commit_batched);
+
+ return 0;
+}
+fs_initcall(xen_mmu_debugfs);
+
+#endif /* CONFIG_XEN_DEBUG_FS */
diff --git a/arch/x86/xen/multicalls.c b/arch/x86/xen/multicalls.c
index 9efd1c6..8ea8a0d 100644
--- a/arch/x86/xen/multicalls.c
+++ b/arch/x86/xen/multicalls.c
@@ -21,16 +21,20 @@
*/
#include <linux/percpu.h>
#include <linux/hardirq.h>
+#include <linux/debugfs.h>
#include <asm/xen/hypercall.h>
#include "multicalls.h"
+#include "debugfs.h"
+
+#define MC_BATCH 32
#define MC_DEBUG 1
-#define MC_BATCH 32
#define MC_ARGS (MC_BATCH * 16)
+
struct mc_buffer {
struct multicall_entry entries[MC_BATCH];
#if MC_DEBUG
@@ -47,6 +51,76 @@ struct mc_buffer {
static DEFINE_PER_CPU(struct mc_buffer, mc_buffer);
DEFINE_PER_CPU(unsigned long, xen_mc_irq_flags);
+/* flush reasons 0- slots, 1- args, 2- callbacks */
+enum flush_reasons
+{
+ FL_SLOTS,
+ FL_ARGS,
+ FL_CALLBACKS,
+
+ FL_N_REASONS
+};
+
+#ifdef CONFIG_XEN_DEBUG_FS
+#define NHYPERCALLS 40 /* not really */
+
+static struct {
+ unsigned histo[MC_BATCH+1];
+
+ unsigned issued;
+ unsigned arg_total;
+ unsigned hypercalls;
+ unsigned histo_hypercalls[NHYPERCALLS];
+
+ unsigned flush[FL_N_REASONS];
+} mc_stats;
+
+static u8 zero_stats;
+
+static inline void check_zero(void)
+{
+ if (unlikely(zero_stats)) {
+ memset(&mc_stats, 0, sizeof(mc_stats));
+ zero_stats = 0;
+ }
+}
+
+static void mc_add_stats(const struct mc_buffer *mc)
+{
+ int i;
+
+ check_zero();
+
+ mc_stats.issued++;
+ mc_stats.hypercalls += mc->mcidx;
+ mc_stats.arg_total += mc->argidx;
+
+ mc_stats.histo[mc->mcidx]++;
+ for(i = 0; i < mc->mcidx; i++) {
+ unsigned op = mc->entries[i].op;
+ if (op < NHYPERCALLS)
+ mc_stats.histo_hypercalls[op]++;
+ }
+}
+
+static void mc_stats_flush(enum flush_reasons idx)
+{
+ check_zero();
+
+ mc_stats.flush[idx]++;
+}
+
+#else /* !CONFIG_XEN_DEBUG_FS */
+
+static inline void mc_add_stats(const struct mc_buffer *mc)
+{
+}
+
+static inline void mc_stats_flush(enum flush_reasons idx)
+{
+}
+#endif /* CONFIG_XEN_DEBUG_FS */
+
void xen_mc_flush(void)
{
struct mc_buffer *b = &__get_cpu_var(mc_buffer);
@@ -60,6 +134,8 @@ void xen_mc_flush(void)
something in the middle */
local_irq_save(flags);
+ mc_add_stats(b);
+
if (b->mcidx) {
#if MC_DEBUG
memcpy(b->debug, b->entries,
@@ -115,6 +191,7 @@ struct multicall_space __xen_mc_entry(size_t args)
if (b->mcidx == MC_BATCH ||
(argidx + args) > MC_ARGS) {
+ mc_stats_flush(b->mcidx == MC_BATCH ? FL_SLOTS : FL_ARGS);
xen_mc_flush();
argidx = roundup(b->argidx, sizeof(u64));
}
@@ -158,10 +235,44 @@ void xen_mc_callback(void (*fn)(void *), void *data)
struct mc_buffer *b = &__get_cpu_var(mc_buffer);
struct callback *cb;
- if (b->cbidx == MC_BATCH)
+ if (b->cbidx == MC_BATCH) {
+ mc_stats_flush(FL_CALLBACKS);
xen_mc_flush();
+ }
cb = &b->callbacks[b->cbidx++];
cb->fn = fn;
cb->data = data;
}
+
+#ifdef CONFIG_XEN_DEBUG_FS
+
+static struct dentry *d_mc_debug;
+
+static int __init xen_mc_debugfs(void)
+{
+ struct dentry *d_xen = xen_init_debugfs();
+
+ if (d_xen == NULL)
+ return -ENOMEM;
+
+ d_mc_debug = debugfs_create_dir("multicalls", d_xen);
+
+ debugfs_create_u8("zero_stats", 0644, d_mc_debug, &zero_stats);
+
+ debugfs_create_u32("batches", 0444, d_mc_debug, &mc_stats.issued);
+ debugfs_create_u32("hypercalls", 0444, d_mc_debug, &mc_stats.hypercalls);
+ debugfs_create_u32("arg_total", 0444, d_mc_debug, &mc_stats.arg_total);
+
+ xen_debugfs_create_u32_array("batch_histo", 0444, d_mc_debug,
+ mc_stats.histo, MC_BATCH);
+ xen_debugfs_create_u32_array("hypercall_histo", 0444, d_mc_debug,
+ mc_stats.histo_hypercalls, NHYPERCALLS);
+ xen_debugfs_create_u32_array("flush_reasons", 0444, d_mc_debug,
+ mc_stats.flush, FL_N_REASONS);
+
+ return 0;
+}
+fs_initcall(xen_mc_debugfs);
+
+#endif /* CONFIG_XEN_DEBUG_FS */
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index d8faf79..d77da61 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -11,11 +11,8 @@
* useful topology information for the kernel to make use of. As a
* result, all CPUs are treated as if they're single-core and
* single-threaded.
- *
- * This does not handle HOTPLUG_CPU yet.
*/
#include <linux/sched.h>
-#include <linux/kernel_stat.h>
#include <linux/err.h>
#include <linux/smp.h>
@@ -36,8 +33,6 @@
#include "xen-ops.h"
#include "mmu.h"
-static void __cpuinit xen_init_lock_cpu(int cpu);
-
cpumask_t xen_cpu_initialized_map;
static DEFINE_PER_CPU(int, resched_irq);
@@ -64,11 +59,12 @@ static irqreturn_t xen_reschedule_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static __cpuinit void cpu_bringup_and_idle(void)
+static __cpuinit void cpu_bringup(void)
{
int cpu = smp_processor_id();
cpu_init();
+ touch_softlockup_watchdog();
preempt_disable();
xen_enable_sysenter();
@@ -89,6 +85,11 @@ static __cpuinit void cpu_bringup_and_idle(void)
local_irq_enable();
wmb(); /* make sure everything is out */
+}
+
+static __cpuinit void cpu_bringup_and_idle(void)
+{
+ cpu_bringup();
cpu_idle();
}
@@ -212,8 +213,6 @@ static void __init xen_smp_prepare_cpus(unsigned int max_cpus)
cpu_set(cpu, cpu_present_map);
}
-
- //init_xenbus_allowed_cpumask();
}
static __cpuinit int
@@ -281,12 +280,6 @@ static int __cpuinit xen_cpu_up(unsigned int cpu)
struct task_struct *idle = idle_task(cpu);
int rc;
-#if 0
- rc = cpu_up_check(cpu);
- if (rc)
- return rc;
-#endif
-
#ifdef CONFIG_X86_64
/* Allocate node local memory for AP pdas */
WARN_ON(cpu == 0);
@@ -339,6 +332,60 @@ static void xen_smp_cpus_done(unsigned int max_cpus)
{
}
+#ifdef CONFIG_HOTPLUG_CPU
+static int xen_cpu_disable(void)
+{
+ unsigned int cpu = smp_processor_id();
+ if (cpu == 0)
+ return -EBUSY;
+
+ cpu_disable_common();
+
+ load_cr3(swapper_pg_dir);
+ return 0;
+}
+
+static void xen_cpu_die(unsigned int cpu)
+{
+ while (HYPERVISOR_vcpu_op(VCPUOP_is_up, cpu, NULL)) {
+ current->state = TASK_UNINTERRUPTIBLE;
+ schedule_timeout(HZ/10);
+ }
+ unbind_from_irqhandler(per_cpu(resched_irq, cpu), NULL);
+ unbind_from_irqhandler(per_cpu(callfunc_irq, cpu), NULL);
+ unbind_from_irqhandler(per_cpu(debug_irq, cpu), NULL);
+ unbind_from_irqhandler(per_cpu(callfuncsingle_irq, cpu), NULL);
+ xen_uninit_lock_cpu(cpu);
+ xen_teardown_timer(cpu);
+
+ if (num_online_cpus() == 1)
+ alternatives_smp_switch(0);
+}
+
+static void xen_play_dead(void)
+{
+ play_dead_common();
+ HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
+ cpu_bringup();
+}
+
+#else /* !CONFIG_HOTPLUG_CPU */
+static int xen_cpu_disable(void)
+{
+ return -ENOSYS;
+}
+
+static void xen_cpu_die(unsigned int cpu)
+{
+ BUG();
+}
+
+static void xen_play_dead(void)
+{
+ BUG();
+}
+
+#endif
static void stop_self(void *v)
{
int cpu = smp_processor_id();
@@ -419,176 +466,16 @@ static irqreturn_t xen_call_function_single_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
-struct xen_spinlock {
- unsigned char lock; /* 0 -> free; 1 -> locked */
- unsigned short spinners; /* count of waiting cpus */
-};
-
-static int xen_spin_is_locked(struct raw_spinlock *lock)
-{
- struct xen_spinlock *xl = (struct xen_spinlock *)lock;
-
- return xl->lock != 0;
-}
-
-static int xen_spin_is_contended(struct raw_spinlock *lock)
-{
- struct xen_spinlock *xl = (struct xen_spinlock *)lock;
-
- /* Not strictly true; this is only the count of contended
- lock-takers entering the slow path. */
- return xl->spinners != 0;
-}
-
-static int xen_spin_trylock(struct raw_spinlock *lock)
-{
- struct xen_spinlock *xl = (struct xen_spinlock *)lock;
- u8 old = 1;
-
- asm("xchgb %b0,%1"
- : "+q" (old), "+m" (xl->lock) : : "memory");
-
- return old == 0;
-}
-
-static DEFINE_PER_CPU(int, lock_kicker_irq) = -1;
-static DEFINE_PER_CPU(struct xen_spinlock *, lock_spinners);
-
-static inline void spinning_lock(struct xen_spinlock *xl)
-{
- __get_cpu_var(lock_spinners) = xl;
- wmb(); /* set lock of interest before count */
- asm(LOCK_PREFIX " incw %0"
- : "+m" (xl->spinners) : : "memory");
-}
-
-static inline void unspinning_lock(struct xen_spinlock *xl)
-{
- asm(LOCK_PREFIX " decw %0"
- : "+m" (xl->spinners) : : "memory");
- wmb(); /* decrement count before clearing lock */
- __get_cpu_var(lock_spinners) = NULL;
-}
-
-static noinline int xen_spin_lock_slow(struct raw_spinlock *lock)
-{
- struct xen_spinlock *xl = (struct xen_spinlock *)lock;
- int irq = __get_cpu_var(lock_kicker_irq);
- int ret;
-
- /* If kicker interrupts not initialized yet, just spin */
- if (irq == -1)
- return 0;
-
- /* announce we're spinning */
- spinning_lock(xl);
-
- /* clear pending */
- xen_clear_irq_pending(irq);
-
- /* check again make sure it didn't become free while
- we weren't looking */
- ret = xen_spin_trylock(lock);
- if (ret)
- goto out;
-
- /* block until irq becomes pending */
- xen_poll_irq(irq);
- kstat_this_cpu.irqs[irq]++;
-
-out:
- unspinning_lock(xl);
- return ret;
-}
-
-static void xen_spin_lock(struct raw_spinlock *lock)
-{
- struct xen_spinlock *xl = (struct xen_spinlock *)lock;
- int timeout;
- u8 oldval;
-
- do {
- timeout = 1 << 10;
-
- asm("1: xchgb %1,%0\n"
- " testb %1,%1\n"
- " jz 3f\n"
- "2: rep;nop\n"
- " cmpb $0,%0\n"
- " je 1b\n"
- " dec %2\n"
- " jnz 2b\n"
- "3:\n"
- : "+m" (xl->lock), "=q" (oldval), "+r" (timeout)
- : "1" (1)
- : "memory");
-
- } while (unlikely(oldval != 0 && !xen_spin_lock_slow(lock)));
-}
-
-static noinline void xen_spin_unlock_slow(struct xen_spinlock *xl)
-{
- int cpu;
-
- for_each_online_cpu(cpu) {
- /* XXX should mix up next cpu selection */
- if (per_cpu(lock_spinners, cpu) == xl) {
- xen_send_IPI_one(cpu, XEN_SPIN_UNLOCK_VECTOR);
- break;
- }
- }
-}
-
-static void xen_spin_unlock(struct raw_spinlock *lock)
-{
- struct xen_spinlock *xl = (struct xen_spinlock *)lock;
-
- smp_wmb(); /* make sure no writes get moved after unlock */
- xl->lock = 0; /* release lock */
-
- /* make sure unlock happens before kick */
- barrier();
-
- if (unlikely(xl->spinners))
- xen_spin_unlock_slow(xl);
-}
-
-static __cpuinit void xen_init_lock_cpu(int cpu)
-{
- int irq;
- const char *name;
-
- name = kasprintf(GFP_KERNEL, "spinlock%d", cpu);
- irq = bind_ipi_to_irqhandler(XEN_SPIN_UNLOCK_VECTOR,
- cpu,
- xen_reschedule_interrupt,
- IRQF_DISABLED|IRQF_PERCPU|IRQF_NOBALANCING,
- name,
- NULL);
-
- if (irq >= 0) {
- disable_irq(irq); /* make sure it's never delivered */
- per_cpu(lock_kicker_irq, cpu) = irq;
- }
-
- printk("cpu %d spinlock event irq %d\n", cpu, irq);
-}
-
-static void __init xen_init_spinlocks(void)
-{
- pv_lock_ops.spin_is_locked = xen_spin_is_locked;
- pv_lock_ops.spin_is_contended = xen_spin_is_contended;
- pv_lock_ops.spin_lock = xen_spin_lock;
- pv_lock_ops.spin_trylock = xen_spin_trylock;
- pv_lock_ops.spin_unlock = xen_spin_unlock;
-}
-
static const struct smp_ops xen_smp_ops __initdata = {
.smp_prepare_boot_cpu = xen_smp_prepare_boot_cpu,
.smp_prepare_cpus = xen_smp_prepare_cpus,
- .cpu_up = xen_cpu_up,
.smp_cpus_done = xen_smp_cpus_done,
+ .cpu_up = xen_cpu_up,
+ .cpu_die = xen_cpu_die,
+ .cpu_disable = xen_cpu_disable,
+ .play_dead = xen_play_dead,
+
.smp_send_stop = xen_smp_send_stop,
.smp_send_reschedule = xen_smp_send_reschedule,
diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c
new file mode 100644
index 0000000..dd71e3a
--- /dev/null
+++ b/arch/x86/xen/spinlock.c
@@ -0,0 +1,428 @@
+/*
+ * Split spinlock implementation out into its own file, so it can be
+ * compiled in a FTRACE-compatible way.
+ */
+#include <linux/kernel_stat.h>
+#include <linux/spinlock.h>
+#include <linux/debugfs.h>
+#include <linux/log2.h>
+
+#include <asm/paravirt.h>
+
+#include <xen/interface/xen.h>
+#include <xen/events.h>
+
+#include "xen-ops.h"
+#include "debugfs.h"
+
+#ifdef CONFIG_XEN_DEBUG_FS
+static struct xen_spinlock_stats
+{
+ u64 taken;
+ u32 taken_slow;
+ u32 taken_slow_nested;
+ u32 taken_slow_pickup;
+ u32 taken_slow_spurious;
+ u32 taken_slow_irqenable;
+
+ u64 released;
+ u32 released_slow;
+ u32 released_slow_kicked;
+
+#define HISTO_BUCKETS 30
+ u32 histo_spin_total[HISTO_BUCKETS+1];
+ u32 histo_spin_spinning[HISTO_BUCKETS+1];
+ u32 histo_spin_blocked[HISTO_BUCKETS+1];
+
+ u64 time_total;
+ u64 time_spinning;
+ u64 time_blocked;
+} spinlock_stats;
+
+static u8 zero_stats;
+
+static unsigned lock_timeout = 1 << 10;
+#define TIMEOUT lock_timeout
+
+static inline void check_zero(void)
+{
+ if (unlikely(zero_stats)) {
+ memset(&spinlock_stats, 0, sizeof(spinlock_stats));
+ zero_stats = 0;
+ }
+}
+
+#define ADD_STATS(elem, val) \
+ do { check_zero(); spinlock_stats.elem += (val); } while(0)
+
+static inline u64 spin_time_start(void)
+{
+ return xen_clocksource_read();
+}
+
+static void __spin_time_accum(u64 delta, u32 *array)
+{
+ unsigned index = ilog2(delta);
+
+ check_zero();
+
+ if (index < HISTO_BUCKETS)
+ array[index]++;
+ else
+ array[HISTO_BUCKETS]++;
+}
+
+static inline void spin_time_accum_spinning(u64 start)
+{
+ u32 delta = xen_clocksource_read() - start;
+
+ __spin_time_accum(delta, spinlock_stats.histo_spin_spinning);
+ spinlock_stats.time_spinning += delta;
+}
+
+static inline void spin_time_accum_total(u64 start)
+{
+ u32 delta = xen_clocksource_read() - start;
+
+ __spin_time_accum(delta, spinlock_stats.histo_spin_total);
+ spinlock_stats.time_total += delta;
+}
+
+static inline void spin_time_accum_blocked(u64 start)
+{
+ u32 delta = xen_clocksource_read() - start;
+
+ __spin_time_accum(delta, spinlock_stats.histo_spin_blocked);
+ spinlock_stats.time_blocked += delta;
+}
+#else /* !CONFIG_XEN_DEBUG_FS */
+#define TIMEOUT (1 << 10)
+#define ADD_STATS(elem, val) do { (void)(val); } while(0)
+
+static inline u64 spin_time_start(void)
+{
+ return 0;
+}
+
+static inline void spin_time_accum_total(u64 start)
+{
+}
+static inline void spin_time_accum_spinning(u64 start)
+{
+}
+static inline void spin_time_accum_blocked(u64 start)
+{
+}
+#endif /* CONFIG_XEN_DEBUG_FS */
+
+struct xen_spinlock {
+ unsigned char lock; /* 0 -> free; 1 -> locked */
+ unsigned short spinners; /* count of waiting cpus */
+};
+
+static int xen_spin_is_locked(struct raw_spinlock *lock)
+{
+ struct xen_spinlock *xl = (struct xen_spinlock *)lock;
+
+ return xl->lock != 0;
+}
+
+static int xen_spin_is_contended(struct raw_spinlock *lock)
+{
+ struct xen_spinlock *xl = (struct xen_spinlock *)lock;
+
+ /* Not strictly true; this is only the count of contended
+ lock-takers entering the slow path. */
+ return xl->spinners != 0;
+}
+
+static int xen_spin_trylock(struct raw_spinlock *lock)
+{
+ struct xen_spinlock *xl = (struct xen_spinlock *)lock;
+ u8 old = 1;
+
+ asm("xchgb %b0,%1"
+ : "+q" (old), "+m" (xl->lock) : : "memory");
+
+ return old == 0;
+}
+
+static DEFINE_PER_CPU(int, lock_kicker_irq) = -1;
+static DEFINE_PER_CPU(struct xen_spinlock *, lock_spinners);
+
+/*
+ * Mark a cpu as interested in a lock. Returns the CPU's previous
+ * lock of interest, in case we got preempted by an interrupt.
+ */
+static inline struct xen_spinlock *spinning_lock(struct xen_spinlock *xl)
+{
+ struct xen_spinlock *prev;
+
+ prev = __get_cpu_var(lock_spinners);
+ __get_cpu_var(lock_spinners) = xl;
+
+ wmb(); /* set lock of interest before count */
+
+ asm(LOCK_PREFIX " incw %0"
+ : "+m" (xl->spinners) : : "memory");
+
+ return prev;
+}
+
+/*
+ * Mark a cpu as no longer interested in a lock. Restores previous
+ * lock of interest (NULL for none).
+ */
+static inline void unspinning_lock(struct xen_spinlock *xl, struct xen_spinlock *prev)
+{
+ asm(LOCK_PREFIX " decw %0"
+ : "+m" (xl->spinners) : : "memory");
+ wmb(); /* decrement count before restoring lock */
+ __get_cpu_var(lock_spinners) = prev;
+}
+
+static noinline int xen_spin_lock_slow(struct raw_spinlock *lock, bool irq_enable)
+{
+ struct xen_spinlock *xl = (struct xen_spinlock *)lock;
+ struct xen_spinlock *prev;
+ int irq = __get_cpu_var(lock_kicker_irq);
+ int ret;
+ unsigned long flags;
+ u64 start;
+
+ /* If kicker interrupts not initialized yet, just spin */
+ if (irq == -1)
+ return 0;
+
+ start = spin_time_start();
+
+ /* announce we're spinning */
+ prev = spinning_lock(xl);
+
+ flags = __raw_local_save_flags();
+ if (irq_enable) {
+ ADD_STATS(taken_slow_irqenable, 1);
+ raw_local_irq_enable();
+ }
+
+ ADD_STATS(taken_slow, 1);
+ ADD_STATS(taken_slow_nested, prev != NULL);
+
+ do {
+ /* clear pending */
+ xen_clear_irq_pending(irq);
+
+ /* check again make sure it didn't become free while
+ we weren't looking */
+ ret = xen_spin_trylock(lock);
+ if (ret) {
+ ADD_STATS(taken_slow_pickup, 1);
+
+ /*
+ * If we interrupted another spinlock while it
+ * was blocking, make sure it doesn't block
+ * without rechecking the lock.
+ */
+ if (prev != NULL)
+ xen_set_irq_pending(irq);
+ goto out;
+ }
+
+ /*
+ * Block until irq becomes pending. If we're
+ * interrupted at this point (after the trylock but
+ * before entering the block), then the nested lock
+ * handler guarantees that the irq will be left
+ * pending if there's any chance the lock became free;
+ * xen_poll_irq() returns immediately if the irq is
+ * pending.
+ */
+ xen_poll_irq(irq);
+ ADD_STATS(taken_slow_spurious, !xen_test_irq_pending(irq));
+ } while (!xen_test_irq_pending(irq)); /* check for spurious wakeups */
+
+ kstat_this_cpu.irqs[irq]++;
+
+out:
+ raw_local_irq_restore(flags);
+ unspinning_lock(xl, prev);
+ spin_time_accum_blocked(start);
+
+ return ret;
+}
+
+static inline void __xen_spin_lock(struct raw_spinlock *lock, bool irq_enable)
+{
+ struct xen_spinlock *xl = (struct xen_spinlock *)lock;
+ unsigned timeout;
+ u8 oldval;
+ u64 start_spin;
+
+ ADD_STATS(taken, 1);
+
+ start_spin = spin_time_start();
+
+ do {
+ u64 start_spin_fast = spin_time_start();
+
+ timeout = TIMEOUT;
+
+ asm("1: xchgb %1,%0\n"
+ " testb %1,%1\n"
+ " jz 3f\n"
+ "2: rep;nop\n"
+ " cmpb $0,%0\n"
+ " je 1b\n"
+ " dec %2\n"
+ " jnz 2b\n"
+ "3:\n"
+ : "+m" (xl->lock), "=q" (oldval), "+r" (timeout)
+ : "1" (1)
+ : "memory");
+
+ spin_time_accum_spinning(start_spin_fast);
+
+ } while (unlikely(oldval != 0 &&
+ (TIMEOUT == ~0 || !xen_spin_lock_slow(lock, irq_enable))));
+
+ spin_time_accum_total(start_spin);
+}
+
+static void xen_spin_lock(struct raw_spinlock *lock)
+{
+ __xen_spin_lock(lock, false);
+}
+
+static void xen_spin_lock_flags(struct raw_spinlock *lock, unsigned long flags)
+{
+ __xen_spin_lock(lock, !raw_irqs_disabled_flags(flags));
+}
+
+static noinline void xen_spin_unlock_slow(struct xen_spinlock *xl)
+{
+ int cpu;
+
+ ADD_STATS(released_slow, 1);
+
+ for_each_online_cpu(cpu) {
+ /* XXX should mix up next cpu selection */
+ if (per_cpu(lock_spinners, cpu) == xl) {
+ ADD_STATS(released_slow_kicked, 1);
+ xen_send_IPI_one(cpu, XEN_SPIN_UNLOCK_VECTOR);
+ break;
+ }
+ }
+}
+
+static void xen_spin_unlock(struct raw_spinlock *lock)
+{
+ struct xen_spinlock *xl = (struct xen_spinlock *)lock;
+
+ ADD_STATS(released, 1);
+
+ smp_wmb(); /* make sure no writes get moved after unlock */
+ xl->lock = 0; /* release lock */
+
+ /* make sure unlock happens before kick */
+ barrier();
+
+ if (unlikely(xl->spinners))
+ xen_spin_unlock_slow(xl);
+}
+
+static irqreturn_t dummy_handler(int irq, void *dev_id)
+{
+ BUG();
+ return IRQ_HANDLED;
+}
+
+void __cpuinit xen_init_lock_cpu(int cpu)
+{
+ int irq;
+ const char *name;
+
+ name = kasprintf(GFP_KERNEL, "spinlock%d", cpu);
+ irq = bind_ipi_to_irqhandler(XEN_SPIN_UNLOCK_VECTOR,
+ cpu,
+ dummy_handler,
+ IRQF_DISABLED|IRQF_PERCPU|IRQF_NOBALANCING,
+ name,
+ NULL);
+
+ if (irq >= 0) {
+ disable_irq(irq); /* make sure it's never delivered */
+ per_cpu(lock_kicker_irq, cpu) = irq;
+ }
+
+ printk("cpu %d spinlock event irq %d\n", cpu, irq);
+}
+
+void xen_uninit_lock_cpu(int cpu)
+{
+ unbind_from_irqhandler(per_cpu(lock_kicker_irq, cpu), NULL);
+}
+
+void __init xen_init_spinlocks(void)
+{
+ pv_lock_ops.spin_is_locked = xen_spin_is_locked;
+ pv_lock_ops.spin_is_contended = xen_spin_is_contended;
+ pv_lock_ops.spin_lock = xen_spin_lock;
+ pv_lock_ops.spin_lock_flags = xen_spin_lock_flags;
+ pv_lock_ops.spin_trylock = xen_spin_trylock;
+ pv_lock_ops.spin_unlock = xen_spin_unlock;
+}
+
+#ifdef CONFIG_XEN_DEBUG_FS
+
+static struct dentry *d_spin_debug;
+
+static int __init xen_spinlock_debugfs(void)
+{
+ struct dentry *d_xen = xen_init_debugfs();
+
+ if (d_xen == NULL)
+ return -ENOMEM;
+
+ d_spin_debug = debugfs_create_dir("spinlocks", d_xen);
+
+ debugfs_create_u8("zero_stats", 0644, d_spin_debug, &zero_stats);
+
+ debugfs_create_u32("timeout", 0644, d_spin_debug, &lock_timeout);
+
+ debugfs_create_u64("taken", 0444, d_spin_debug, &spinlock_stats.taken);
+ debugfs_create_u32("taken_slow", 0444, d_spin_debug,
+ &spinlock_stats.taken_slow);
+ debugfs_create_u32("taken_slow_nested", 0444, d_spin_debug,
+ &spinlock_stats.taken_slow_nested);
+ debugfs_create_u32("taken_slow_pickup", 0444, d_spin_debug,
+ &spinlock_stats.taken_slow_pickup);
+ debugfs_create_u32("taken_slow_spurious", 0444, d_spin_debug,
+ &spinlock_stats.taken_slow_spurious);
+ debugfs_create_u32("taken_slow_irqenable", 0444, d_spin_debug,
+ &spinlock_stats.taken_slow_irqenable);
+
+ debugfs_create_u64("released", 0444, d_spin_debug, &spinlock_stats.released);
+ debugfs_create_u32("released_slow", 0444, d_spin_debug,
+ &spinlock_stats.released_slow);
+ debugfs_create_u32("released_slow_kicked", 0444, d_spin_debug,
+ &spinlock_stats.released_slow_kicked);
+
+ debugfs_create_u64("time_spinning", 0444, d_spin_debug,
+ &spinlock_stats.time_spinning);
+ debugfs_create_u64("time_blocked", 0444, d_spin_debug,
+ &spinlock_stats.time_blocked);
+ debugfs_create_u64("time_total", 0444, d_spin_debug,
+ &spinlock_stats.time_total);
+
+ xen_debugfs_create_u32_array("histo_total", 0444, d_spin_debug,
+ spinlock_stats.histo_spin_total, HISTO_BUCKETS + 1);
+ xen_debugfs_create_u32_array("histo_spinning", 0444, d_spin_debug,
+ spinlock_stats.histo_spin_spinning, HISTO_BUCKETS + 1);
+ xen_debugfs_create_u32_array("histo_blocked", 0444, d_spin_debug,
+ spinlock_stats.histo_spin_blocked, HISTO_BUCKETS + 1);
+
+ return 0;
+}
+fs_initcall(xen_spinlock_debugfs);
+
+#endif /* CONFIG_XEN_DEBUG_FS */
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index 685b774..004ba86 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -30,8 +30,6 @@
#define TIMER_SLOP 100000
#define NS_PER_TICK (1000000000LL / HZ)
-static cycle_t xen_clocksource_read(void);
-
/* runstate info updated by Xen */
static DEFINE_PER_CPU(struct vcpu_runstate_info, runstate);
@@ -213,7 +211,7 @@ unsigned long xen_tsc_khz(void)
return xen_khz;
}
-static cycle_t xen_clocksource_read(void)
+cycle_t xen_clocksource_read(void)
{
struct pvclock_vcpu_time_info *src;
cycle_t ret;
@@ -452,6 +450,14 @@ void xen_setup_timer(int cpu)
setup_runstate_info(cpu);
}
+void xen_teardown_timer(int cpu)
+{
+ struct clock_event_device *evt;
+ BUG_ON(cpu == 0);
+ evt = &per_cpu(xen_clock_events, cpu);
+ unbind_from_irqhandler(evt->irq, NULL);
+}
+
void xen_setup_cpu_clockevents(void)
{
BUG_ON(preemptible());
diff --git a/arch/x86/xen/xen-asm_32.S b/arch/x86/xen/xen-asm_32.S
index 2497a30..42786f5 100644
--- a/arch/x86/xen/xen-asm_32.S
+++ b/arch/x86/xen/xen-asm_32.S
@@ -298,7 +298,7 @@ check_events:
push %eax
push %ecx
push %edx
- call force_evtchn_callback
+ call xen_force_evtchn_callback
pop %edx
pop %ecx
pop %eax
diff --git a/arch/x86/xen/xen-asm_64.S b/arch/x86/xen/xen-asm_64.S
index 7f58304..3b9bda4 100644
--- a/arch/x86/xen/xen-asm_64.S
+++ b/arch/x86/xen/xen-asm_64.S
@@ -122,7 +122,7 @@ check_events:
push %r9
push %r10
push %r11
- call force_evtchn_callback
+ call xen_force_evtchn_callback
pop %r11
pop %r10
pop %r9
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index dd3c231..d7422dc 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -2,6 +2,7 @@
#define XEN_OPS_H
#include <linux/init.h>
+#include <linux/clocksource.h>
#include <linux/irqreturn.h>
#include <xen/xen-ops.h>
@@ -31,7 +32,10 @@ void xen_vcpu_restore(void);
void __init xen_build_dynamic_phys_to_machine(void);
+void xen_init_irq_ops(void);
void xen_setup_timer(int cpu);
+void xen_teardown_timer(int cpu);
+cycle_t xen_clocksource_read(void);
void xen_setup_cpu_clockevents(void);
unsigned long xen_tsc_khz(void);
void __init xen_time_init(void);
@@ -50,6 +54,10 @@ void __init xen_setup_vcpu_info_placement(void);
#ifdef CONFIG_SMP
void xen_smp_init(void);
+void __init xen_init_spinlocks(void);
+__cpuinit void xen_init_lock_cpu(int cpu);
+void xen_uninit_lock_cpu(int cpu);
+
extern cpumask_t xen_cpu_initialized_map;
#else
static inline void xen_smp_init(void) {}
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 3ca643c..d5e7532 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1032,7 +1032,7 @@ static struct xenbus_driver blkfront = {
static int __init xlblk_init(void)
{
- if (!is_running_on_xen())
+ if (!xen_domain())
return -ENODEV;
if (register_blkdev(XENVBD_MAJOR, DEV_NAME)) {
diff --git a/drivers/char/hvc_xen.c b/drivers/char/hvc_xen.c
index 6b70aa6..538ceea 100644
--- a/drivers/char/hvc_xen.c
+++ b/drivers/char/hvc_xen.c
@@ -108,8 +108,8 @@ static int __init xen_init(void)
{
struct hvc_struct *hp;
- if (!is_running_on_xen() ||
- is_initial_xendomain() ||
+ if (!xen_pv_domain() ||
+ xen_initial_domain() ||
!xen_start_info->console.domU.evtchn)
return -ENODEV;
@@ -142,7 +142,7 @@ static void __exit xen_fini(void)
static int xen_cons_init(void)
{
- if (!is_running_on_xen())
+ if (!xen_pv_domain())
return 0;
hvc_instantiate(HVC_COOKIE, 0, &hvc_ops);
diff --git a/drivers/input/xen-kbdfront.c b/drivers/input/xen-kbdfront.c
index 9ce3b3b..3ab6362 100644
--- a/drivers/input/xen-kbdfront.c
+++ b/drivers/input/xen-kbdfront.c
@@ -335,11 +335,11 @@ static struct xenbus_driver xenkbd = {
static int __init xenkbd_init(void)
{
- if (!is_running_on_xen())
+ if (!xen_domain())
return -ENODEV;
/* Nothing to do if running in dom0. */
- if (is_initial_xendomain())
+ if (xen_initial_domain())
return -ENODEV;
return xenbus_register_frontend(&xenkbd);
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index c749bdb..3c3dd40 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -1794,10 +1794,10 @@ static struct xenbus_driver netfront = {
static int __init netif_init(void)
{
- if (!is_running_on_xen())
+ if (!xen_domain())
return -ENODEV;
- if (is_initial_xendomain())
+ if (xen_initial_domain())
return 0;
printk(KERN_INFO "Initialising Xen virtual ethernet driver.\n");
@@ -1809,7 +1809,7 @@ module_init(netif_init);
static void __exit netif_exit(void)
{
- if (is_initial_xendomain())
+ if (xen_initial_domain())
return;
xenbus_unregister_driver(&netfront);
diff --git a/drivers/video/xen-fbfront.c b/drivers/video/xen-fbfront.c
index 47ed39b..a463b3d 100644
--- a/drivers/video/xen-fbfront.c
+++ b/drivers/video/xen-fbfront.c
@@ -680,11 +680,11 @@ static struct xenbus_driver xenfb = {
static int __init xenfb_init(void)
{
- if (!is_running_on_xen())
+ if (!xen_domain())
return -ENODEV;
/* Nothing to do if running in dom0. */
- if (is_initial_xendomain())
+ if (xen_initial_domain())
return -ENODEV;
return xenbus_register_frontend(&xenfb);
diff --git a/drivers/xen/Makefile b/drivers/xen/Makefile
index 363286c..d2a8fdf 100644
--- a/drivers/xen/Makefile
+++ b/drivers/xen/Makefile
@@ -1,4 +1,5 @@
obj-y += grant-table.o features.o events.o manage.o
obj-y += xenbus/
+obj-$(CONFIG_HOTPLUG_CPU) += cpu_hotplug.o
obj-$(CONFIG_XEN_XENCOMM) += xencomm.o
obj-$(CONFIG_XEN_BALLOON) += balloon.o
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 2e15da5..a51f3e1 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -226,9 +226,8 @@ static int increase_reservation(unsigned long nr_pages)
}
set_xen_guest_handle(reservation.extent_start, frame_list);
- reservation.nr_extents = nr_pages;
- rc = HYPERVISOR_memory_op(
- XENMEM_populate_physmap, &reservation);
+ reservation.nr_extents = nr_pages;
+ rc = HYPERVISOR_memory_op(XENMEM_populate_physmap, &reservation);
if (rc < nr_pages) {
if (rc > 0) {
int ret;
@@ -236,7 +235,7 @@ static int increase_reservation(unsigned long nr_pages)
/* We hit the Xen hard limit: reprobe. */
reservation.nr_extents = rc;
ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation,
- &reservation);
+ &reservation);
BUG_ON(ret != rc);
}
if (rc >= 0)
@@ -420,7 +419,7 @@ static int __init balloon_init(void)
unsigned long pfn;
struct page *page;
- if (!is_running_on_xen())
+ if (!xen_pv_domain())
return -ENODEV;
pr_info("xen_balloon: Initialising balloon driver.\n");
@@ -464,136 +463,13 @@ static void balloon_exit(void)
module_exit(balloon_exit);
-static void balloon_update_driver_allowance(long delta)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&balloon_lock, flags);
- balloon_stats.driver_pages += delta;
- spin_unlock_irqrestore(&balloon_lock, flags);
-}
-
-static int dealloc_pte_fn(
- pte_t *pte, struct page *pmd_page, unsigned long addr, void *data)
-{
- unsigned long mfn = pte_mfn(*pte);
- int ret;
- struct xen_memory_reservation reservation = {
- .nr_extents = 1,
- .extent_order = 0,
- .domid = DOMID_SELF
- };
- set_xen_guest_handle(reservation.extent_start, &mfn);
- set_pte_at(&init_mm, addr, pte, __pte_ma(0ull));
- set_phys_to_machine(__pa(addr) >> PAGE_SHIFT, INVALID_P2M_ENTRY);
- ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation, &reservation);
- BUG_ON(ret != 1);
- return 0;
-}
-
-static struct page **alloc_empty_pages_and_pagevec(int nr_pages)
-{
- unsigned long vaddr, flags;
- struct page *page, **pagevec;
- int i, ret;
-
- pagevec = kmalloc(sizeof(page) * nr_pages, GFP_KERNEL);
- if (pagevec == NULL)
- return NULL;
-
- for (i = 0; i < nr_pages; i++) {
- page = pagevec[i] = alloc_page(GFP_KERNEL);
- if (page == NULL)
- goto err;
-
- vaddr = (unsigned long)page_address(page);
-
- scrub_page(page);
-
- spin_lock_irqsave(&balloon_lock, flags);
-
- if (xen_feature(XENFEAT_auto_translated_physmap)) {
- unsigned long gmfn = page_to_pfn(page);
- struct xen_memory_reservation reservation = {
- .nr_extents = 1,
- .extent_order = 0,
- .domid = DOMID_SELF
- };
- set_xen_guest_handle(reservation.extent_start, &gmfn);
- ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation,
- &reservation);
- if (ret == 1)
- ret = 0; /* success */
- } else {
- ret = apply_to_page_range(&init_mm, vaddr, PAGE_SIZE,
- dealloc_pte_fn, NULL);
- }
-
- if (ret != 0) {
- spin_unlock_irqrestore(&balloon_lock, flags);
- __free_page(page);
- goto err;
- }
-
- totalram_pages = --balloon_stats.current_pages;
-
- spin_unlock_irqrestore(&balloon_lock, flags);
- }
-
- out:
- schedule_work(&balloon_worker);
- flush_tlb_all();
- return pagevec;
-
- err:
- spin_lock_irqsave(&balloon_lock, flags);
- while (--i >= 0)
- balloon_append(pagevec[i]);
- spin_unlock_irqrestore(&balloon_lock, flags);
- kfree(pagevec);
- pagevec = NULL;
- goto out;
-}
-
-static void free_empty_pages_and_pagevec(struct page **pagevec, int nr_pages)
-{
- unsigned long flags;
- int i;
-
- if (pagevec == NULL)
- return;
-
- spin_lock_irqsave(&balloon_lock, flags);
- for (i = 0; i < nr_pages; i++) {
- BUG_ON(page_count(pagevec[i]) != 1);
- balloon_append(pagevec[i]);
- }
- spin_unlock_irqrestore(&balloon_lock, flags);
-
- kfree(pagevec);
-
- schedule_work(&balloon_worker);
-}
-
-static void balloon_release_driver_page(struct page *page)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&balloon_lock, flags);
- balloon_append(page);
- balloon_stats.driver_pages--;
- spin_unlock_irqrestore(&balloon_lock, flags);
-
- schedule_work(&balloon_worker);
-}
-
-
-#define BALLOON_SHOW(name, format, args...) \
- static ssize_t show_##name(struct sys_device *dev, \
- char *buf) \
- { \
- return sprintf(buf, format, ##args); \
- } \
+#define BALLOON_SHOW(name, format, args...) \
+ static ssize_t show_##name(struct sys_device *dev, \
+ struct sysdev_attribute *attr, \
+ char *buf) \
+ { \
+ return sprintf(buf, format, ##args); \
+ } \
static SYSDEV_ATTR(name, S_IRUGO, show_##name, NULL)
BALLOON_SHOW(current_kb, "%lu\n", PAGES2KB(balloon_stats.current_pages));
@@ -604,7 +480,8 @@ BALLOON_SHOW(hard_limit_kb,
(balloon_stats.hard_limit!=~0UL) ? PAGES2KB(balloon_stats.hard_limit) : 0);
BALLOON_SHOW(driver_kb, "%lu\n", PAGES2KB(balloon_stats.driver_pages));
-static ssize_t show_target_kb(struct sys_device *dev, char *buf)
+static ssize_t show_target_kb(struct sys_device *dev, struct sysdev_attribute *attr,
+ char *buf)
{
return sprintf(buf, "%lu\n", PAGES2KB(balloon_stats.target_pages));
}
@@ -614,19 +491,14 @@ static ssize_t store_target_kb(struct sys_device *dev,
const char *buf,
size_t count)
{
- char memstring[64], *endchar;
+ char *endchar;
unsigned long long target_bytes;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (count <= 1)
- return -EBADMSG; /* runt */
- if (count > sizeof(memstring))
- return -EFBIG; /* too long */
- strcpy(memstring, buf);
+ target_bytes = memparse(buf, &endchar);
- target_bytes = memparse(memstring, &endchar);
balloon_set_new_target(target_bytes >> PAGE_SHIFT);
return count;
@@ -694,20 +566,4 @@ static int register_balloon(struct sys_device *sysdev)
return error;
}
-static void unregister_balloon(struct sys_device *sysdev)
-{
- int i;
-
- sysfs_remove_group(&sysdev->kobj, &balloon_info_group);
- for (i = 0; i < ARRAY_SIZE(balloon_attrs); i++)
- sysdev_remove_file(sysdev, balloon_attrs[i]);
- sysdev_unregister(sysdev);
- sysdev_class_unregister(&balloon_sysdev_class);
-}
-
-static void balloon_sysfs_exit(void)
-{
- unregister_balloon(&balloon_sysdev);
-}
-
MODULE_LICENSE("GPL");
diff --git a/drivers/xen/cpu_hotplug.c b/drivers/xen/cpu_hotplug.c
new file mode 100644
index 0000000..565280e
--- /dev/null
+++ b/drivers/xen/cpu_hotplug.c
@@ -0,0 +1,90 @@
+#include <linux/notifier.h>
+
+#include <xen/xenbus.h>
+
+#include <asm-x86/xen/hypervisor.h>
+#include <asm/cpu.h>
+
+static void enable_hotplug_cpu(int cpu)
+{
+ if (!cpu_present(cpu))
+ arch_register_cpu(cpu);
+
+ cpu_set(cpu, cpu_present_map);
+}
+
+static void disable_hotplug_cpu(int cpu)
+{
+ if (cpu_present(cpu))
+ arch_unregister_cpu(cpu);
+
+ cpu_clear(cpu, cpu_present_map);
+}
+
+static void vcpu_hotplug(unsigned int cpu)
+{
+ int err;
+ char dir[32], state[32];
+
+ if (!cpu_possible(cpu))
+ return;
+
+ sprintf(dir, "cpu/%u", cpu);
+ err = xenbus_scanf(XBT_NIL, dir, "availability", "%s", state);
+ if (err != 1) {
+ printk(KERN_ERR "XENBUS: Unable to read cpu state\n");
+ return;
+ }
+
+ if (strcmp(state, "online") == 0) {
+ enable_hotplug_cpu(cpu);
+ } else if (strcmp(state, "offline") == 0) {
+ (void)cpu_down(cpu);
+ disable_hotplug_cpu(cpu);
+ } else {
+ printk(KERN_ERR "XENBUS: unknown state(%s) on CPU%d\n",
+ state, cpu);
+ }
+}
+
+static void handle_vcpu_hotplug_event(struct xenbus_watch *watch,
+ const char **vec, unsigned int len)
+{
+ unsigned int cpu;
+ char *cpustr;
+ const char *node = vec[XS_WATCH_PATH];
+
+ cpustr = strstr(node, "cpu/");
+ if (cpustr != NULL) {
+ sscanf(cpustr, "cpu/%u", &cpu);
+ vcpu_hotplug(cpu);
+ }
+}
+
+static int setup_cpu_watcher(struct notifier_block *notifier,
+ unsigned long event, void *data)
+{
+ static struct xenbus_watch cpu_watch = {
+ .node = "cpu",
+ .callback = handle_vcpu_hotplug_event};
+
+ (void)register_xenbus_watch(&cpu_watch);
+
+ return NOTIFY_DONE;
+}
+
+static int __init setup_vcpu_hotplug_event(void)
+{
+ static struct notifier_block xsn_cpu = {
+ .notifier_call = setup_cpu_watcher };
+
+ if (!xen_pv_domain())
+ return -ENODEV;
+
+ register_xenstore_notifier(&xsn_cpu);
+
+ return 0;
+}
+
+arch_initcall(setup_vcpu_hotplug_event);
+
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 0e0c285..c3290bc 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -84,17 +84,6 @@ static int irq_bindcount[NR_IRQS];
/* Xen will never allocate port zero for any purpose. */
#define VALID_EVTCHN(chn) ((chn) != 0)
-/*
- * Force a proper event-channel callback from Xen after clearing the
- * callback mask. We do this in a very simple manner, by making a call
- * down into Xen. The pending flag will be checked by Xen on return.
- */
-void force_evtchn_callback(void)
-{
- (void)HYPERVISOR_xen_version(0, NULL);
-}
-EXPORT_SYMBOL_GPL(force_evtchn_callback);
-
static struct irq_chip xen_dynamic_chip;
/* Constructor for packed IRQ information. */
@@ -175,6 +164,12 @@ static inline void set_evtchn(int port)
sync_set_bit(port, &s->evtchn_pending[0]);
}
+static inline int test_evtchn(int port)
+{
+ struct shared_info *s = HYPERVISOR_shared_info;
+ return sync_test_bit(port, &s->evtchn_pending[0]);
+}
+
/**
* notify_remote_via_irq - send event to remote end of event channel via irq
@@ -365,6 +360,10 @@ static void unbind_from_irq(unsigned int irq)
per_cpu(virq_to_irq, cpu_from_evtchn(evtchn))
[index_from_irq(irq)] = -1;
break;
+ case IRQT_IPI:
+ per_cpu(ipi_to_irq, cpu_from_evtchn(evtchn))
+ [index_from_irq(irq)] = -1;
+ break;
default:
break;
}
@@ -743,6 +742,25 @@ void xen_clear_irq_pending(int irq)
clear_evtchn(evtchn);
}
+void xen_set_irq_pending(int irq)
+{
+ int evtchn = evtchn_from_irq(irq);
+
+ if (VALID_EVTCHN(evtchn))
+ set_evtchn(evtchn);
+}
+
+bool xen_test_irq_pending(int irq)
+{
+ int evtchn = evtchn_from_irq(irq);
+ bool ret = false;
+
+ if (VALID_EVTCHN(evtchn))
+ ret = test_evtchn(evtchn);
+
+ return ret;
+}
+
/* Poll waiting for an irq to become pending. In the usual case, the
irq will be disabled so it won't deliver an interrupt. */
void xen_poll_irq(int irq)
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index e9e1116..06592b9 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -508,7 +508,7 @@ static int __devinit gnttab_init(void)
unsigned int max_nr_glist_frames, nr_glist_frames;
unsigned int nr_init_grefs;
- if (!is_running_on_xen())
+ if (!xen_domain())
return -ENODEV;
nr_grant_frames = 1;
diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c
index 57ceb53..7f24a98 100644
--- a/drivers/xen/xenbus/xenbus_probe.c
+++ b/drivers/xen/xenbus/xenbus_probe.c
@@ -814,7 +814,7 @@ static int __init xenbus_probe_init(void)
DPRINTK("");
err = -ENODEV;
- if (!is_running_on_xen())
+ if (!xen_domain())
goto out_error;
/* Register ourselves with the kernel bus subsystem */
@@ -829,7 +829,7 @@ static int __init xenbus_probe_init(void)
/*
* Domain0 doesn't have a store_evtchn or store_mfn yet.
*/
- if (is_initial_xendomain()) {
+ if (xen_initial_domain()) {
/* dom0 not yet supported */
} else {
xenstored_ready = 1;
@@ -846,7 +846,7 @@ static int __init xenbus_probe_init(void)
goto out_unreg_back;
}
- if (!is_initial_xendomain())
+ if (!xen_initial_domain())
xenbus_probe(NULL);
return 0;
@@ -937,7 +937,7 @@ static void wait_for_devices(struct xenbus_driver *xendrv)
unsigned long timeout = jiffies + 10*HZ;
struct device_driver *drv = xendrv ? &xendrv->driver : NULL;
- if (!ready_to_wait_for_devices || !is_running_on_xen())
+ if (!ready_to_wait_for_devices || !xen_domain())
return;
while (exists_disconnected_device(drv)) {
diff --git a/include/asm-x86/acpi.h b/include/asm-x86/acpi.h
index 392e173..672e1e1 100644
--- a/include/asm-x86/acpi.h
+++ b/include/asm-x86/acpi.h
@@ -102,9 +102,6 @@ static inline void disable_acpi(void)
acpi_noirq = 1;
}
-/* Fixmap pages to reserve for ACPI boot-time tables (see fixmap.h) */
-#define FIX_ACPI_PAGES 4
-
extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index b73fea5..f06adac 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -24,6 +24,11 @@ static inline void fill_ldt(struct desc_struct *desc,
desc->d = info->seg_32bit;
desc->g = info->limit_in_pages;
desc->base2 = (info->base_addr & 0xff000000) >> 24;
+ /*
+ * Don't allow setting of the lm bit. It is useless anyway
+ * because 64bit system calls require __USER_CS:
+ */
+ desc->l = 0;
}
extern struct desc_ptr idt_descr;
@@ -97,7 +102,15 @@ static inline int desc_empty(const void *ptr)
native_write_gdt_entry(dt, entry, desc, type)
#define write_idt_entry(dt, entry, g) \
native_write_idt_entry(dt, entry, g)
-#endif
+
+static inline void paravirt_alloc_ldt(struct desc_struct *ldt, unsigned entries)
+{
+}
+
+static inline void paravirt_free_ldt(struct desc_struct *ldt, unsigned entries)
+{
+}
+#endif /* CONFIG_PARAVIRT */
static inline void native_write_idt_entry(gate_desc *idt, int entry,
const gate_desc *gate)
@@ -338,20 +351,16 @@ static inline void set_system_intr_gate(unsigned int n, void *addr)
_set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
}
-static inline void set_trap_gate(unsigned int n, void *addr)
+static inline void set_system_trap_gate(unsigned int n, void *addr)
{
BUG_ON((unsigned)n > 0xFF);
- _set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
+ _set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
}
-static inline void set_system_gate(unsigned int n, void *addr)
+static inline void set_trap_gate(unsigned int n, void *addr)
{
BUG_ON((unsigned)n > 0xFF);
-#ifdef CONFIG_X86_32
- _set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
-#else
- _set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
-#endif
+ _set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
}
static inline void set_task_gate(unsigned int n, unsigned int gdt_entry)
@@ -366,7 +375,7 @@ static inline void set_intr_gate_ist(int n, void *addr, unsigned ist)
_set_gate(n, GATE_INTERRUPT, addr, 0, ist, __KERNEL_CS);
}
-static inline void set_system_gate_ist(int n, void *addr, unsigned ist)
+static inline void set_system_intr_gate_ist(int n, void *addr, unsigned ist)
{
BUG_ON((unsigned)n > 0xFF);
_set_gate(n, GATE_INTERRUPT, addr, 0x3, ist, __KERNEL_CS);
diff --git a/include/asm-x86/dma-mapping.h b/include/asm-x86/dma-mapping.h
index 0fff2e0..219c33d 100644
--- a/include/asm-x86/dma-mapping.h
+++ b/include/asm-x86/dma-mapping.h
@@ -306,4 +306,3 @@ static inline void dma_free_coherent(struct device *dev, size_t size,
}
#endif
-#endif /* ASM_X86__DMA_MAPPING_H */
diff --git a/include/asm-x86/es7000/mpparse.h b/include/asm-x86/es7000/mpparse.h
index 7b5c889..ed5a3ca 100644
--- a/include/asm-x86/es7000/mpparse.h
+++ b/include/asm-x86/es7000/mpparse.h
@@ -5,6 +5,7 @@
extern int parse_unisys_oem (char *oemptr);
extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
+extern void unmap_unisys_acpi_oem_table(unsigned long oem_addr);
extern void setup_unisys(void);
#ifndef CONFIG_X86_GENERICARCH
diff --git a/include/asm-x86/fixmap_32.h b/include/asm-x86/fixmap_32.h
index 784e3e7..c6fde10 100644
--- a/include/asm-x86/fixmap_32.h
+++ b/include/asm-x86/fixmap_32.h
@@ -94,15 +94,11 @@ enum fixed_addresses {
* can have a single pgd entry and a single pte table:
*/
#define NR_FIX_BTMAPS 64
-#define FIX_BTMAPS_NESTING 4
+#define FIX_BTMAPS_SLOTS 4
FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 256 -
(__end_of_permanent_fixed_addresses & 255),
- FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1,
+ FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_SLOTS - 1,
FIX_WP_TEST,
-#ifdef CONFIG_ACPI
- FIX_ACPI_BEGIN,
- FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
-#endif
#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
FIX_OHCI1394_BASE,
#endif
diff --git a/include/asm-x86/fixmap_64.h b/include/asm-x86/fixmap_64.h
index dafb24b..a6ff01d 100644
--- a/include/asm-x86/fixmap_64.h
+++ b/include/asm-x86/fixmap_64.h
@@ -49,26 +49,22 @@ enum fixed_addresses {
#ifdef CONFIG_PARAVIRT
FIX_PARAVIRT_BOOTMAP,
#endif
-#ifdef CONFIG_ACPI
- FIX_ACPI_BEGIN,
- FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
-#endif
+ __end_of_permanent_fixed_addresses,
#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
FIX_OHCI1394_BASE,
#endif
- __end_of_permanent_fixed_addresses,
/*
* 256 temporary boot-time mappings, used by early_ioremap(),
* before ioremap() is functional.
*
- * We round it up to the next 512 pages boundary so that we
+ * We round it up to the next 256 pages boundary so that we
* can have a single pgd entry and a single pte table:
*/
#define NR_FIX_BTMAPS 64
-#define FIX_BTMAPS_NESTING 4
- FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 512 -
- (__end_of_permanent_fixed_addresses & 511),
- FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1,
+#define FIX_BTMAPS_SLOTS 4
+ FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 256 -
+ (__end_of_permanent_fixed_addresses & 255),
+ FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_SLOTS - 1,
__end_of_fixed_addresses
};
diff --git a/include/asm-x86/io.h b/include/asm-x86/io.h
index 72b7719..a233f83 100644
--- a/include/asm-x86/io.h
+++ b/include/asm-x86/io.h
@@ -5,20 +5,6 @@
#include <linux/compiler.h>
-/*
- * early_ioremap() and early_iounmap() are for temporary early boot-time
- * mappings, before the real ioremap() is functional.
- * A boot-time mapping is currently limited to at most 16 pages.
- */
-#ifndef __ASSEMBLY__
-extern void early_ioremap_init(void);
-extern void early_ioremap_clear(void);
-extern void early_ioremap_reset(void);
-extern void *early_ioremap(unsigned long offset, unsigned long size);
-extern void early_iounmap(void *addr, unsigned long size);
-extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
-#endif
-
#define build_mmio_read(name, size, type, reg, barrier) \
static inline type name(const volatile void __iomem *addr) \
{ type ret; asm volatile("mov" size " %1,%0":reg (ret) \
@@ -97,6 +83,7 @@ extern void early_ioremap_init(void);
extern void early_ioremap_clear(void);
extern void early_ioremap_reset(void);
extern void *early_ioremap(unsigned long offset, unsigned long size);
+extern void *early_memremap(unsigned long offset, unsigned long size);
extern void early_iounmap(void *addr, unsigned long size);
extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
diff --git a/include/asm-x86/io_64.h b/include/asm-x86/io_64.h
index 64429e9..ee6e086 100644
--- a/include/asm-x86/io_64.h
+++ b/include/asm-x86/io_64.h
@@ -165,9 +165,6 @@ static inline void *phys_to_virt(unsigned long address)
#include <asm-generic/iomap.h>
-extern void *early_ioremap(unsigned long addr, unsigned long size);
-extern void early_iounmap(void *addr, unsigned long size);
-
/*
* This one maps high address device memory and turns off caching for that area.
* it's useful if some control registers are in such an area and write combining
diff --git a/include/asm-x86/irqflags.h b/include/asm-x86/irqflags.h
index 424acb4..2bdab21 100644
--- a/include/asm-x86/irqflags.h
+++ b/include/asm-x86/irqflags.h
@@ -166,27 +166,6 @@ static inline int raw_irqs_disabled(void)
return raw_irqs_disabled_flags(flags);
}
-/*
- * makes the traced hardirq state match with the machine state
- *
- * should be a rarely used function, only in places where its
- * otherwise impossible to know the irq state, like in traps.
- */
-static inline void trace_hardirqs_fixup_flags(unsigned long flags)
-{
- if (raw_irqs_disabled_flags(flags))
- trace_hardirqs_off();
- else
- trace_hardirqs_on();
-}
-
-static inline void trace_hardirqs_fixup(void)
-{
- unsigned long flags = __raw_local_save_flags();
-
- trace_hardirqs_fixup_flags(flags);
-}
-
#else
#ifdef CONFIG_X86_64
diff --git a/include/asm-x86/kdebug.h b/include/asm-x86/kdebug.h
index 5ec3ad3..fbbab66 100644
--- a/include/asm-x86/kdebug.h
+++ b/include/asm-x86/kdebug.h
@@ -27,10 +27,9 @@ extern void printk_address(unsigned long address, int reliable);
extern void die(const char *, struct pt_regs *,long);
extern int __must_check __die(const char *, struct pt_regs *, long);
extern void show_registers(struct pt_regs *regs);
-extern void __show_registers(struct pt_regs *, int all);
extern void show_trace(struct task_struct *t, struct pt_regs *regs,
unsigned long *sp, unsigned long bp);
-extern void __show_regs(struct pt_regs *regs);
+extern void __show_regs(struct pt_regs *regs, int all);
extern void show_regs(struct pt_regs *regs);
extern unsigned long oops_begin(void);
extern void oops_end(unsigned long, struct pt_regs *, int signr);
diff --git a/include/asm-x86/kprobes.h b/include/asm-x86/kprobes.h
index bd84078..8a0748d 100644
--- a/include/asm-x86/kprobes.h
+++ b/include/asm-x86/kprobes.h
@@ -82,15 +82,6 @@ struct kprobe_ctlblk {
struct prev_kprobe prev_kprobe;
};
-/* trap3/1 are intr gates for kprobes. So, restore the status of IF,
- * if necessary, before executing the original int3/1 (trap) handler.
- */
-static inline void restore_interrupts(struct pt_regs *regs)
-{
- if (regs->flags & X86_EFLAGS_IF)
- local_irq_enable();
-}
-
extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
extern int kprobe_exceptions_notify(struct notifier_block *self,
unsigned long val, void *data);
diff --git a/include/asm-x86/mach-default/mach_traps.h b/include/asm-x86/mach-default/mach_traps.h
index de9ac3f..ff8778f 100644
--- a/include/asm-x86/mach-default/mach_traps.h
+++ b/include/asm-x86/mach-default/mach_traps.h
@@ -7,12 +7,6 @@
#include <asm/mc146818rtc.h>
-static inline void clear_mem_error(unsigned char reason)
-{
- reason = (reason & 0xf) | 4;
- outb(reason, 0x61);
-}
-
static inline unsigned char get_nmi_reason(void)
{
return inb(0x61);
diff --git a/include/asm-x86/mmzone_64.h b/include/asm-x86/mmzone_64.h
index 626b03a..6480f33 100644
--- a/include/asm-x86/mmzone_64.h
+++ b/include/asm-x86/mmzone_64.h
@@ -7,7 +7,7 @@
#ifdef CONFIG_NUMA
-#define VIRTUAL_BUG_ON(x)
+#include <linux/mmdebug.h>
#include <asm/smp.h>
@@ -29,7 +29,6 @@ static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
{
unsigned nid;
VIRTUAL_BUG_ON(!memnodemap);
- VIRTUAL_BUG_ON((addr >> memnode_shift) >= memnodemapsize);
nid = memnodemap[addr >> memnode_shift];
VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]);
return nid;
diff --git a/include/asm-x86/module.h b/include/asm-x86/module.h
index 48dc3e0..864f200 100644
--- a/include/asm-x86/module.h
+++ b/include/asm-x86/module.h
@@ -52,8 +52,6 @@ struct mod_arch_specific {};
#define MODULE_PROC_FAMILY "EFFICEON "
#elif defined CONFIG_MWINCHIPC6
#define MODULE_PROC_FAMILY "WINCHIPC6 "
-#elif defined CONFIG_MWINCHIP2
-#define MODULE_PROC_FAMILY "WINCHIP2 "
#elif defined CONFIG_MWINCHIP3D
#define MODULE_PROC_FAMILY "WINCHIP3D "
#elif defined CONFIG_MCYRIXIII
diff --git a/include/asm-x86/nmi.h b/include/asm-x86/nmi.h
index d5e715f..a53f829 100644
--- a/include/asm-x86/nmi.h
+++ b/include/asm-x86/nmi.h
@@ -15,10 +15,6 @@
*/
int do_nmi_callback(struct pt_regs *regs, int cpu);
-#ifdef CONFIG_X86_64
-extern void default_do_nmi(struct pt_regs *);
-#endif
-
extern void die_nmi(char *str, struct pt_regs *regs, int do_panic);
extern int check_nmi_watchdog(void);
extern int nmi_watchdog_enabled;
diff --git a/include/asm-x86/page.h b/include/asm-x86/page.h
index c915747..d4f1d57 100644
--- a/include/asm-x86/page.h
+++ b/include/asm-x86/page.h
@@ -179,6 +179,7 @@ static inline pteval_t native_pte_flags(pte_t pte)
#endif /* CONFIG_PARAVIRT */
#define __pa(x) __phys_addr((unsigned long)(x))
+#define __pa_nodebug(x) __phys_addr_nodebug((unsigned long)(x))
/* __pa_symbol should be used for C visible symbols.
This seems to be the official gcc blessed way to do such arithmetic. */
#define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x)))
@@ -188,9 +189,14 @@ static inline pteval_t native_pte_flags(pte_t pte)
#define __boot_va(x) __va(x)
#define __boot_pa(x) __pa(x)
+/*
+ * virt_to_page(kaddr) returns a valid pointer if and only if
+ * virt_addr_valid(kaddr) returns true.
+ */
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
-#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+extern bool __virt_addr_valid(unsigned long kaddr);
+#define virt_addr_valid(kaddr) __virt_addr_valid((unsigned long) (kaddr))
#endif /* __ASSEMBLY__ */
diff --git a/include/asm-x86/page_32.h b/include/asm-x86/page_32.h
index 72f7305..e8d80d1 100644
--- a/include/asm-x86/page_32.h
+++ b/include/asm-x86/page_32.h
@@ -20,6 +20,12 @@
#endif
#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
+#define STACKFAULT_STACK 0
+#define DOUBLEFAULT_STACK 1
+#define NMI_STACK 0
+#define DEBUG_STACK 0
+#define MCE_STACK 0
+#define N_EXCEPTION_STACKS 1
#ifdef CONFIG_X86_PAE
/* 44=32+12, the limit we can fit into an unsigned long pfn */
@@ -73,7 +79,12 @@ typedef struct page *pgtable_t;
#endif
#ifndef __ASSEMBLY__
-#define __phys_addr(x) ((x) - PAGE_OFFSET)
+#define __phys_addr_nodebug(x) ((x) - PAGE_OFFSET)
+#ifdef CONFIG_DEBUG_VIRTUAL
+extern unsigned long __phys_addr(unsigned long);
+#else
+#define __phys_addr(x) __phys_addr_nodebug(x)
+#endif
#define __phys_reloc_hide(x) RELOC_HIDE((x), 0)
#ifdef CONFIG_FLATMEM
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index d7d358a..8d6ae2f 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -124,6 +124,9 @@ struct pv_cpu_ops {
int entrynum, const void *desc, int size);
void (*write_idt_entry)(gate_desc *,
int entrynum, const gate_desc *gate);
+ void (*alloc_ldt)(struct desc_struct *ldt, unsigned entries);
+ void (*free_ldt)(struct desc_struct *ldt, unsigned entries);
+
void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
void (*set_iopl_mask)(unsigned mask);
@@ -325,6 +328,7 @@ struct pv_lock_ops {
int (*spin_is_locked)(struct raw_spinlock *lock);
int (*spin_is_contended)(struct raw_spinlock *lock);
void (*spin_lock)(struct raw_spinlock *lock);
+ void (*spin_lock_flags)(struct raw_spinlock *lock, unsigned long flags);
int (*spin_trylock)(struct raw_spinlock *lock);
void (*spin_unlock)(struct raw_spinlock *lock);
};
@@ -830,6 +834,16 @@ do { \
(aux) = __aux; \
} while (0)
+static inline void paravirt_alloc_ldt(struct desc_struct *ldt, unsigned entries)
+{
+ PVOP_VCALL2(pv_cpu_ops.alloc_ldt, ldt, entries);
+}
+
+static inline void paravirt_free_ldt(struct desc_struct *ldt, unsigned entries)
+{
+ PVOP_VCALL2(pv_cpu_ops.free_ldt, ldt, entries);
+}
+
static inline void load_TR_desc(void)
{
PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
@@ -1394,6 +1408,12 @@ static __always_inline void __raw_spin_lock(struct raw_spinlock *lock)
PVOP_VCALL1(pv_lock_ops.spin_lock, lock);
}
+static __always_inline void __raw_spin_lock_flags(struct raw_spinlock *lock,
+ unsigned long flags)
+{
+ PVOP_VCALL2(pv_lock_ops.spin_lock_flags, lock, flags);
+}
+
static __always_inline int __raw_spin_trylock(struct raw_spinlock *lock)
{
return PVOP_CALL1(int, pv_lock_ops.spin_trylock, lock);
diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h
index ed93245..182f9d4 100644
--- a/include/asm-x86/pgtable.h
+++ b/include/asm-x86/pgtable.h
@@ -15,7 +15,7 @@
#define _PAGE_BIT_PAT 7 /* on 4KB pages */
#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
#define _PAGE_BIT_UNUSED1 9 /* available for programmer */
-#define _PAGE_BIT_UNUSED2 10
+#define _PAGE_BIT_IOMAP 10 /* flag used to indicate IO mapping */
#define _PAGE_BIT_UNUSED3 11
#define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */
#define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1
@@ -32,7 +32,7 @@
#define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
#define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
#define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1)
-#define _PAGE_UNUSED2 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED2)
+#define _PAGE_IOMAP (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP)
#define _PAGE_UNUSED3 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED3)
#define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
#define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
@@ -99,6 +99,11 @@
#define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE)
#define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
+#define __PAGE_KERNEL_IO (__PAGE_KERNEL | _PAGE_IOMAP)
+#define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP)
+#define __PAGE_KERNEL_IO_UC_MINUS (__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP)
+#define __PAGE_KERNEL_IO_WC (__PAGE_KERNEL_WC | _PAGE_IOMAP)
+
#define PAGE_KERNEL __pgprot(__PAGE_KERNEL)
#define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO)
#define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
@@ -113,6 +118,11 @@
#define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL)
#define PAGE_KERNEL_VSYSCALL_NOCACHE __pgprot(__PAGE_KERNEL_VSYSCALL_NOCACHE)
+#define PAGE_KERNEL_IO __pgprot(__PAGE_KERNEL_IO)
+#define PAGE_KERNEL_IO_NOCACHE __pgprot(__PAGE_KERNEL_IO_NOCACHE)
+#define PAGE_KERNEL_IO_UC_MINUS __pgprot(__PAGE_KERNEL_IO_UC_MINUS)
+#define PAGE_KERNEL_IO_WC __pgprot(__PAGE_KERNEL_IO_WC)
+
/* xwr */
#define __P000 PAGE_NONE
#define __P001 PAGE_READONLY
@@ -196,7 +206,7 @@ static inline int pte_exec(pte_t pte)
static inline int pte_special(pte_t pte)
{
- return pte_val(pte) & _PAGE_SPECIAL;
+ return pte_flags(pte) & _PAGE_SPECIAL;
}
static inline unsigned long pte_pfn(pte_t pte)
diff --git a/include/asm-x86/ptrace.h b/include/asm-x86/ptrace.h
index ac578f1..a202552 100644
--- a/include/asm-x86/ptrace.h
+++ b/include/asm-x86/ptrace.h
@@ -174,12 +174,8 @@ extern unsigned long profile_pc(struct pt_regs *regs);
extern unsigned long
convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
-
-#ifdef CONFIG_X86_32
extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
int error_code, int si_code);
-#endif
-
void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
extern long syscall_trace_enter(struct pt_regs *);
diff --git a/include/asm-x86/smp.h b/include/asm-x86/smp.h
index 29324c1..a6afc29 100644
--- a/include/asm-x86/smp.h
+++ b/include/asm-x86/smp.h
@@ -50,12 +50,16 @@ extern struct {
struct smp_ops {
void (*smp_prepare_boot_cpu)(void);
void (*smp_prepare_cpus)(unsigned max_cpus);
- int (*cpu_up)(unsigned cpu);
void (*smp_cpus_done)(unsigned max_cpus);
void (*smp_send_stop)(void);
void (*smp_send_reschedule)(int cpu);
+ int (*cpu_up)(unsigned cpu);
+ int (*cpu_disable)(void);
+ void (*cpu_die)(unsigned int cpu);
+ void (*play_dead)(void);
+
void (*send_call_func_ipi)(cpumask_t mask);
void (*send_call_func_single_ipi)(int cpu);
};
@@ -94,6 +98,21 @@ static inline int __cpu_up(unsigned int cpu)
return smp_ops.cpu_up(cpu);
}
+static inline int __cpu_disable(void)
+{
+ return smp_ops.cpu_disable();
+}
+
+static inline void __cpu_die(unsigned int cpu)
+{
+ smp_ops.cpu_die(cpu);
+}
+
+static inline void play_dead(void)
+{
+ smp_ops.play_dead();
+}
+
static inline void smp_send_reschedule(int cpu)
{
smp_ops.smp_send_reschedule(cpu);
@@ -109,15 +128,20 @@ static inline void arch_send_call_function_ipi(cpumask_t mask)
smp_ops.send_call_func_ipi(mask);
}
+void cpu_disable_common(void);
void native_smp_prepare_boot_cpu(void);
void native_smp_prepare_cpus(unsigned int max_cpus);
void native_smp_cpus_done(unsigned int max_cpus);
int native_cpu_up(unsigned int cpunum);
+int native_cpu_disable(void);
+void native_cpu_die(unsigned int cpu);
+void native_play_dead(void);
+void play_dead_common(void);
+
void native_send_call_func_ipi(cpumask_t mask);
void native_send_call_func_single_ipi(int cpu);
-extern int __cpu_disable(void);
-extern void __cpu_die(unsigned int cpu);
+extern void prefill_possible_map(void);
void smp_store_cpu_info(int id);
#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
@@ -127,15 +151,11 @@ static inline int num_booting_cpus(void)
{
return cpus_weight(cpu_callout_map);
}
-#endif /* CONFIG_SMP */
-
-#if defined(CONFIG_SMP) && defined(CONFIG_HOTPLUG_CPU)
-extern void prefill_possible_map(void);
#else
static inline void prefill_possible_map(void)
{
}
-#endif
+#endif /* CONFIG_SMP */
extern unsigned disabled_cpus __cpuinitdata;
@@ -205,9 +225,5 @@ static inline int hard_smp_processor_id(void)
#endif /* CONFIG_X86_LOCAL_APIC */
-#ifdef CONFIG_HOTPLUG_CPU
-extern void cpu_uninit(void);
-#endif
-
#endif /* __ASSEMBLY__ */
#endif /* ASM_X86__SMP_H */
diff --git a/include/asm-x86/spinlock.h b/include/asm-x86/spinlock.h
index 93adae3..8badab0 100644
--- a/include/asm-x86/spinlock.h
+++ b/include/asm-x86/spinlock.h
@@ -182,8 +182,6 @@ static __always_inline void __ticket_spin_unlock(raw_spinlock_t *lock)
}
#endif
-#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
-
#ifdef CONFIG_PARAVIRT
/*
* Define virtualization-friendly old-style lock byte lock, for use in
@@ -272,6 +270,13 @@ static __always_inline void __raw_spin_unlock(raw_spinlock_t *lock)
{
__ticket_spin_unlock(lock);
}
+
+static __always_inline void __raw_spin_lock_flags(raw_spinlock_t *lock,
+ unsigned long flags)
+{
+ __raw_spin_lock(lock);
+}
+
#endif /* CONFIG_PARAVIRT */
static inline void __raw_spin_unlock_wait(raw_spinlock_t *lock)
diff --git a/include/asm-x86/system.h b/include/asm-x86/system.h
index 34505dd..b20c894 100644
--- a/include/asm-x86/system.h
+++ b/include/asm-x86/system.h
@@ -64,7 +64,10 @@ do { \
\
/* regparm parameters for __switch_to(): */ \
[prev] "a" (prev), \
- [next] "d" (next)); \
+ [next] "d" (next) \
+ \
+ : /* reloaded segment registers */ \
+ "memory"); \
} while (0)
/*
diff --git a/include/asm-x86/tlbflush.h b/include/asm-x86/tlbflush.h
index ef68b76..3cdd08b 100644
--- a/include/asm-x86/tlbflush.h
+++ b/include/asm-x86/tlbflush.h
@@ -119,6 +119,10 @@ static inline void native_flush_tlb_others(const cpumask_t *cpumask,
{
}
+static inline void reset_lazy_tlbstate(void)
+{
+}
+
#else /* SMP */
#include <asm/smp.h>
@@ -151,6 +155,12 @@ struct tlb_state {
char __cacheline_padding[L1_CACHE_BYTES-8];
};
DECLARE_PER_CPU(struct tlb_state, cpu_tlbstate);
+
+void reset_lazy_tlbstate(void);
+#else
+static inline void reset_lazy_tlbstate(void)
+{
+}
#endif
#endif /* SMP */
diff --git a/include/asm-x86/traps.h b/include/asm-x86/traps.h
index 7a692ba..6c3dc2c 100644
--- a/include/asm-x86/traps.h
+++ b/include/asm-x86/traps.h
@@ -3,7 +3,12 @@
#include <asm/debugreg.h>
-/* Common in X86_32 and X86_64 */
+#ifdef CONFIG_X86_32
+#define dotraplinkage
+#else
+#define dotraplinkage asmlinkage
+#endif
+
asmlinkage void divide_error(void);
asmlinkage void debug(void);
asmlinkage void nmi(void);
@@ -12,31 +17,47 @@ asmlinkage void overflow(void);
asmlinkage void bounds(void);
asmlinkage void invalid_op(void);
asmlinkage void device_not_available(void);
+#ifdef CONFIG_X86_64
+asmlinkage void double_fault(void);
+#endif
asmlinkage void coprocessor_segment_overrun(void);
asmlinkage void invalid_TSS(void);
asmlinkage void segment_not_present(void);
asmlinkage void stack_segment(void);
asmlinkage void general_protection(void);
asmlinkage void page_fault(void);
+asmlinkage void spurious_interrupt_bug(void);
asmlinkage void coprocessor_error(void);
-asmlinkage void simd_coprocessor_error(void);
asmlinkage void alignment_check(void);
-asmlinkage void spurious_interrupt_bug(void);
#ifdef CONFIG_X86_MCE
asmlinkage void machine_check(void);
#endif /* CONFIG_X86_MCE */
+asmlinkage void simd_coprocessor_error(void);
-void do_divide_error(struct pt_regs *, long);
-void do_overflow(struct pt_regs *, long);
-void do_bounds(struct pt_regs *, long);
-void do_coprocessor_segment_overrun(struct pt_regs *, long);
-void do_invalid_TSS(struct pt_regs *, long);
-void do_segment_not_present(struct pt_regs *, long);
-void do_stack_segment(struct pt_regs *, long);
-void do_alignment_check(struct pt_regs *, long);
-void do_invalid_op(struct pt_regs *, long);
-void do_general_protection(struct pt_regs *, long);
-void do_nmi(struct pt_regs *, long);
+dotraplinkage void do_divide_error(struct pt_regs *, long);
+dotraplinkage void do_debug(struct pt_regs *, long);
+dotraplinkage void do_nmi(struct pt_regs *, long);
+dotraplinkage void do_int3(struct pt_regs *, long);
+dotraplinkage void do_overflow(struct pt_regs *, long);
+dotraplinkage void do_bounds(struct pt_regs *, long);
+dotraplinkage void do_invalid_op(struct pt_regs *, long);
+dotraplinkage void do_device_not_available(struct pt_regs *, long);
+dotraplinkage void do_coprocessor_segment_overrun(struct pt_regs *, long);
+dotraplinkage void do_invalid_TSS(struct pt_regs *, long);
+dotraplinkage void do_segment_not_present(struct pt_regs *, long);
+dotraplinkage void do_stack_segment(struct pt_regs *, long);
+dotraplinkage void do_general_protection(struct pt_regs *, long);
+dotraplinkage void do_page_fault(struct pt_regs *, unsigned long);
+dotraplinkage void do_spurious_interrupt_bug(struct pt_regs *, long);
+dotraplinkage void do_coprocessor_error(struct pt_regs *, long);
+dotraplinkage void do_alignment_check(struct pt_regs *, long);
+#ifdef CONFIG_X86_MCE
+dotraplinkage void do_machine_check(struct pt_regs *, long);
+#endif
+dotraplinkage void do_simd_coprocessor_error(struct pt_regs *, long);
+#ifdef CONFIG_X86_32
+dotraplinkage void do_iret_error(struct pt_regs *, long);
+#endif
static inline int get_si_code(unsigned long condition)
{
@@ -52,31 +73,9 @@ extern int panic_on_unrecovered_nmi;
extern int kstack_depth_to_print;
#ifdef CONFIG_X86_32
-
-void do_iret_error(struct pt_regs *, long);
-void do_int3(struct pt_regs *, long);
-void do_debug(struct pt_regs *, long);
void math_error(void __user *);
-void do_coprocessor_error(struct pt_regs *, long);
-void do_simd_coprocessor_error(struct pt_regs *, long);
-void do_spurious_interrupt_bug(struct pt_regs *, long);
unsigned long patch_espfix_desc(unsigned long, unsigned long);
asmlinkage void math_emulate(long);
+#endif
-void do_page_fault(struct pt_regs *regs, unsigned long error_code);
-
-#else /* CONFIG_X86_32 */
-
-asmlinkage void double_fault(void);
-
-asmlinkage void do_int3(struct pt_regs *, long);
-asmlinkage void do_stack_segment(struct pt_regs *, long);
-asmlinkage void do_debug(struct pt_regs *, unsigned long);
-asmlinkage void do_coprocessor_error(struct pt_regs *);
-asmlinkage void do_simd_coprocessor_error(struct pt_regs *);
-asmlinkage void do_spurious_interrupt_bug(struct pt_regs *);
-
-asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code);
-
-#endif /* CONFIG_X86_32 */
#endif /* ASM_X86__TRAPS_H */
diff --git a/include/asm-x86/xen/hypervisor.h b/include/asm-x86/xen/hypervisor.h
index 0ef3a88..445a247 100644
--- a/include/asm-x86/xen/hypervisor.h
+++ b/include/asm-x86/xen/hypervisor.h
@@ -54,7 +54,6 @@
/* arch/i386/kernel/setup.c */
extern struct shared_info *HYPERVISOR_shared_info;
extern struct start_info *xen_start_info;
-#define is_initial_xendomain() (xen_start_info->flags & SIF_INITDOMAIN)
/* arch/i386/mach-xen/evtchn.c */
/* Force a proper event-channel callback from Xen. */
@@ -67,6 +66,17 @@ u64 jiffies_to_st(unsigned long jiffies);
#define MULTI_UVMFLAGS_INDEX 3
#define MULTI_UVMDOMID_INDEX 4
-#define is_running_on_xen() (xen_start_info ? 1 : 0)
+enum xen_domain_type {
+ XEN_NATIVE,
+ XEN_PV_DOMAIN,
+ XEN_HVM_DOMAIN,
+};
+
+extern enum xen_domain_type xen_domain_type;
+
+#define xen_domain() (xen_domain_type != XEN_NATIVE)
+#define xen_pv_domain() (xen_domain_type == XEN_PV_DOMAIN)
+#define xen_initial_domain() (xen_pv_domain() && xen_start_info->flags & SIF_INITDOMAIN)
+#define xen_hvm_domain() (xen_domain_type == XEN_HVM_DOMAIN)
#endif /* ASM_X86__XEN__HYPERVISOR_H */
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 2651f80..75d81f1 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -182,7 +182,7 @@ extern int vsscanf(const char *, const char *, va_list)
extern int get_option(char **str, int *pint);
extern char *get_options(const char *str, int nints, int *ints);
-extern unsigned long long memparse(char *ptr, char **retptr);
+extern unsigned long long memparse(const char *ptr, char **retptr);
extern int core_kernel_text(unsigned long addr);
extern int __kernel_text_address(unsigned long addr);
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 72a15dc..c61ba10 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -7,6 +7,7 @@
#include <linux/gfp.h>
#include <linux/list.h>
+#include <linux/mmdebug.h>
#include <linux/mmzone.h>
#include <linux/rbtree.h>
#include <linux/prio_tree.h>
@@ -219,12 +220,6 @@ struct inode;
*/
#include <linux/page-flags.h>
-#ifdef CONFIG_DEBUG_VM
-#define VM_BUG_ON(cond) BUG_ON(cond)
-#else
-#define VM_BUG_ON(condition) do { } while(0)
-#endif
-
/*
* Methods to modify the page usage count.
*
@@ -919,7 +914,7 @@ static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long a
}
#endif /* CONFIG_MMU && !__ARCH_HAS_4LEVEL_HACK */
-#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
+#if USE_SPLIT_PTLOCKS
/*
* We tuck a spinlock to guard each pagetable page into its struct page,
* at page->private, with BUILD_BUG_ON to make sure that this will not
@@ -932,14 +927,14 @@ static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long a
} while (0)
#define pte_lock_deinit(page) ((page)->mapping = NULL)
#define pte_lockptr(mm, pmd) ({(void)(mm); __pte_lockptr(pmd_page(*(pmd)));})
-#else
+#else /* !USE_SPLIT_PTLOCKS */
/*
* We use mm->page_table_lock to guard all pagetable pages of the mm.
*/
#define pte_lock_init(page) do {} while (0)
#define pte_lock_deinit(page) do {} while (0)
#define pte_lockptr(mm, pmd) ({(void)(pmd); &(mm)->page_table_lock;})
-#endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
+#endif /* USE_SPLIT_PTLOCKS */
static inline void pgtable_page_ctor(struct page *page)
{
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index bf33413..9d49fa3 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -21,11 +21,13 @@
struct address_space;
-#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
+#define USE_SPLIT_PTLOCKS (NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS)
+
+#if USE_SPLIT_PTLOCKS
typedef atomic_long_t mm_counter_t;
-#else /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
+#else /* !USE_SPLIT_PTLOCKS */
typedef unsigned long mm_counter_t;
-#endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
+#endif /* !USE_SPLIT_PTLOCKS */
/*
* Each physical page in the system has a struct page associated with
@@ -65,7 +67,7 @@ struct page {
* see PAGE_MAPPING_ANON below.
*/
};
-#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
+#if USE_SPLIT_PTLOCKS
spinlock_t ptl;
#endif
struct kmem_cache *slab; /* SLUB: Pointer to slab */
diff --git a/include/linux/mmdebug.h b/include/linux/mmdebug.h
new file mode 100644
index 0000000..8a55098
--- /dev/null
+++ b/include/linux/mmdebug.h
@@ -0,0 +1,18 @@
+#ifndef LINUX_MM_DEBUG_H
+#define LINUX_MM_DEBUG_H 1
+
+#include <linux/autoconf.h>
+
+#ifdef CONFIG_DEBUG_VM
+#define VM_BUG_ON(cond) BUG_ON(cond)
+#else
+#define VM_BUG_ON(cond) do { } while (0)
+#endif
+
+#ifdef CONFIG_DEBUG_VIRTUAL
+#define VIRTUAL_BUG_ON(cond) BUG_ON(cond)
+#else
+#define VIRTUAL_BUG_ON(cond) do { } while (0)
+#endif
+
+#endif
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 3d9120c..272c353 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -352,7 +352,7 @@ arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
extern void arch_unmap_area(struct mm_struct *, unsigned long);
extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);
-#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
+#if USE_SPLIT_PTLOCKS
/*
* The mm counters are not protected by its page_table_lock,
* so must be incremented atomically.
@@ -363,7 +363,7 @@ extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);
#define inc_mm_counter(mm, member) atomic_long_inc(&(mm)->_##member)
#define dec_mm_counter(mm, member) atomic_long_dec(&(mm)->_##member)
-#else /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
+#else /* !USE_SPLIT_PTLOCKS */
/*
* The mm counters are protected by its page_table_lock,
* so can be incremented directly.
@@ -374,7 +374,7 @@ extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);
#define inc_mm_counter(mm, member) (mm)->_##member++
#define dec_mm_counter(mm, member) (mm)->_##member--
-#endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
+#endif /* !USE_SPLIT_PTLOCKS */
#define get_mm_rss(mm) \
(get_mm_counter(mm, file_rss) + get_mm_counter(mm, anon_rss))
diff --git a/include/xen/events.h b/include/xen/events.h
index 4680ff3..0d5f1ad 100644
--- a/include/xen/events.h
+++ b/include/xen/events.h
@@ -46,6 +46,8 @@ extern void xen_irq_resume(void);
/* Clear an irq's pending state, in preparation for polling on it */
void xen_clear_irq_pending(int irq);
+void xen_set_irq_pending(int irq);
+bool xen_test_irq_pending(int irq);
/* Poll waiting for an irq to become pending. In the usual case, the
irq will be disabled so it won't deliver an interrupt. */
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 0b50481..082235b 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -495,6 +495,15 @@ config DEBUG_VM
If unsure, say N.
+config DEBUG_VIRTUAL
+ bool "Debug VM translations"
+ depends on DEBUG_KERNEL && X86
+ help
+ Enable some costly sanity checks in virtual to page code. This can
+ catch mistakes with virt_to_page() and friends.
+
+ If unsure, say N.
+
config DEBUG_WRITECOUNT
bool "Debug filesystem writers count"
depends on DEBUG_KERNEL
diff --git a/lib/cmdline.c b/lib/cmdline.c
index 5ba8a94..f5f3ad8 100644
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -126,7 +126,7 @@ char *get_options(const char *str, int nints, int *ints)
* megabyte, or one gigabyte, respectively.
*/
-unsigned long long memparse(char *ptr, char **retptr)
+unsigned long long memparse(const char *ptr, char **retptr)
{
char *endptr; /* local pointer to end of parsed string */
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 85b9a0d..bba06c4 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -180,6 +180,13 @@ struct page *vmalloc_to_page(const void *vmalloc_addr)
pmd_t *pmd;
pte_t *ptep, pte;
+ /*
+ * XXX we might need to change this if we add VIRTUAL_BUG_ON for
+ * architectures that do not vmalloc module space
+ */
+ VIRTUAL_BUG_ON(!is_vmalloc_addr(vmalloc_addr) &&
+ !is_module_address(addr));
+
if (!pgd_none(*pgd)) {
pud = pud_offset(pgd, addr);
if (!pud_none(*pud)) {
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [git pull] x86 updates for v2.6.28, phase #6, misc
2008-10-10 8:26 ` Ingo Molnar
@ 2008-10-11 3:44 ` Nick Piggin
0 siblings, 0 replies; 6+ messages in thread
From: Nick Piggin @ 2008-10-11 3:44 UTC (permalink / raw)
To: Ingo Molnar
Cc: Jeremy Fitzhardinge, Linus Torvalds, linux-kernel, Andrew Morton,
Thomas Gleixner, H. Peter Anvin
On Friday 10 October 2008 19:26, Ingo Molnar wrote:
> * Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> > Nick Piggin wrote:
> >> On Friday 10 October 2008 11:08, Ingo Molnar wrote:
> >>> out-of-topic modifications in x86-v28-for-linus-phase6:
> >>> -------------------------------------------------------
> >>> include/linux/kernel.h # d974ae3: generic, memparse():
> >>> constify arg include/linux/mm.h # f7d0b92: mm: define
> >>> USE_SPLIT_PTLOCKS rath # 59ea746: MM: virtual address debug
> >>> include/linux/mm_types.h # f7d0b92: mm: define
> >>> USE_SPLIT_PTLOCKS rath include/linux/mmdebug.h # 7aa413d:
> >>> x86, MM: virtual address debug, c # 59ea746: MM: virtual address debug
> >>> lib/cmdline.c
> >>> # d974ae3: generic, memparse(): constify arg mm/vmalloc.c
> >>> # 7aa413d: x86, MM: virtual address debug, c #
> >>> 59ea746: MM:
> >>> virtual address debug
> >>
> >> How come these kinds of things go into the x86 tree? Can't they
> >> be sent to other maintainer first (probably Andrew, in the case
> >> of random -mm stuff).
> >>
> >> OK, it's pretty trivial stuff, but just on principle I can't see
> >> an advantage, and only disadvantages to doing this (and also I
> >> see the vmalloc change clashed with the vmalloc rewrite in -mm).
> >
> > The memparse and split ptlocks changes went past Andrew. They ended
> > up in Ingo's tree because 1) they're pretty trivial, and 2) there's
> > x86-specific stuff which depends on them. Don't know about the
> > vmalloc change.
>
> yeah, correct, as Jeremy already noted they had dependencies with PAT
> and other ioremap relevant changes in the x86 tree so it had to be
> layered.
OK fair enough. I thought the virtual address debug stuff was a
bit more significant touching common code.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2008-10-11 3:44 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2008-10-10 0:08 [git pull] x86 updates for v2.6.28, phase #6, misc Ingo Molnar
2008-10-10 3:43 ` Nick Piggin
2008-10-10 4:18 ` Jeremy Fitzhardinge
2008-10-10 8:26 ` Ingo Molnar
2008-10-11 3:44 ` Nick Piggin
2008-10-10 18:41 ` [git pull, take 2] " Ingo Molnar
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