* [v2 PATCH 0/3] Use NMI to stop cpus
@ 2011-10-13 19:14 Don Zickus
2011-10-13 19:14 ` [v2 PATCH 1/3] x86, reboot: Use NMI instead of REBOOT_VECTOR " Don Zickus
` (3 more replies)
0 siblings, 4 replies; 21+ messages in thread
From: Don Zickus @ 2011-10-13 19:14 UTC (permalink / raw)
To: Ingo Molnar, Andi Kleen, x86
Cc: LKML, Peter Zijlstra, Robert Richter, Andrew Morton,
seiji.aguchi, vgoyal, mjg, tony.luck, gong.chen, satoru.moriya,
avi, Don Zickus
This patch series attempts to use NMI to stop cpus instead of the
REBOOT_VECTOR irq. The idea is to have a more robust and reliable
way to stop cpus when serializing things like the panic path.
More details in the changelogs.
Don Zickus (3):
x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpus
x86, NMI: Add NMI IPI selftest
x86, NMI: knob to disable using NMI IPIs to stop cpus
Documentation/kernel-parameters.txt | 4 +
arch/x86/Kconfig.debug | 12 +++
arch/x86/include/asm/smp.h | 6 +
arch/x86/kernel/Makefile | 1 +
arch/x86/kernel/nmi_selftest.c | 179 +++++++++++++++++++++++++++++++++++
arch/x86/kernel/smp.c | 72 ++++++++++++++-
arch/x86/kernel/smpboot.c | 1 +
7 files changed, 273 insertions(+), 2 deletions(-)
create mode 100644 arch/x86/kernel/nmi_selftest.c
--
1.7.6.4
^ permalink raw reply [flat|nested] 21+ messages in thread
* [v2 PATCH 1/3] x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpus
2011-10-13 19:14 [v2 PATCH 0/3] Use NMI to stop cpus Don Zickus
@ 2011-10-13 19:14 ` Don Zickus
2011-12-05 13:21 ` [tip:x86/debug] " tip-bot for Don Zickus
2011-10-13 19:14 ` [v2 PATCH 2/3] x86, NMI: Add NMI IPI selftest Don Zickus
` (2 subsequent siblings)
3 siblings, 1 reply; 21+ messages in thread
From: Don Zickus @ 2011-10-13 19:14 UTC (permalink / raw)
To: Ingo Molnar, Andi Kleen, x86
Cc: LKML, Peter Zijlstra, Robert Richter, Andrew Morton,
seiji.aguchi, vgoyal, mjg, tony.luck, gong.chen, satoru.moriya,
avi, Don Zickus
A recent discussion started talking about the locking on the pstore fs
and how it relates to the kmsg infrastructure. We noticed it was possible
for userspace to r/w to the pstore fs (grabbing the locks in the process)
and block the panic path from r/w to the same fs.
The reason was the cpu with the lock could be doing work while the crashing
cpu is panic'ing. Busting those spinlocks might cause those cpus to step
on each other's data. Fine, fair enough.
It was suggested it would be nice to serialize the panic path (ie stop
the other cpus) and have only one cpu running. This would allow us to
bust the spinlocks and not worry about another cpu stepping on the data.
Of course, smp_send_stop() does this in the panic case. kmsg_dump() would
have to be moved to be called after it. Easy enough.
The only problem is on x86 the smp_send_stop() function calls the
REBOOT_VECTOR. Any cpu with irqs disabled (which pstore and its backend
ERST would do), block this IPI and thus do not stop. This makes it
difficult to reliably log data to the pstore fs.
The patch below switches from the REBOOT_VECTOR to NMI (and mimics what
kdump does). Switching to NMI allows us to deliver the IPI when irqs are
disabled, increasing the reliability of this function.
However, Andi carefully noted that on some machines this approach does not
work because of broken BIOSes or whatever.
To help accomodate this, the next couple of patches will run a selftest and
provide a knob to disable.
V2:
uses atomic ops to serialize the cpu that shuts everyone down
V3:
comment cleanup
Signed-off-by: Don Zickus <dzickus@redhat.com>
---
[note] this patch sits on top of another NMI infrastructure change I have
submitted, so the nmi registeration might not apply cleanly without that patch.
---
arch/x86/kernel/smp.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 57 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index 013e7eb..991d184 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -28,6 +28,7 @@
#include <asm/mmu_context.h>
#include <asm/proto.h>
#include <asm/apic.h>
+#include <asm/nmi.h>
/*
* Some notes on x86 processor bugs affecting SMP operation:
*
@@ -147,6 +148,60 @@ void native_send_call_func_ipi(const struct cpumask *mask)
free_cpumask_var(allbutself);
}
+static atomic_t stopping_cpu = ATOMIC_INIT(-1);
+
+static int smp_stop_nmi_callback(unsigned int val, struct pt_regs *regs)
+{
+ /* We are registered on stopping cpu too, avoid spurious NMI */
+ if (raw_smp_processor_id() == atomic_read(&stopping_cpu))
+ return NMI_HANDLED;
+
+ stop_this_cpu(NULL);
+
+ return NMI_HANDLED;
+}
+
+static void native_nmi_stop_other_cpus(int wait)
+{
+ unsigned long flags;
+ unsigned long timeout;
+
+ if (reboot_force)
+ return;
+
+ /*
+ * Use an own vector here because smp_call_function
+ * does lots of things not suitable in a panic situation.
+ */
+ if (num_online_cpus() > 1) {
+ /* did someone beat us here? */
+ if (atomic_cmpxchg(&stopping_cpu, -1, safe_smp_processor_id() != -1))
+ return;
+
+ if (register_nmi_handler(NMI_LOCAL, smp_stop_nmi_callback,
+ NMI_FLAG_FIRST, "smp_stop"))
+ /* Note: we ignore failures here */
+ return;
+
+ /* sync above data before sending NMI */
+ wmb();
+
+ apic->send_IPI_allbutself(NMI_VECTOR);
+
+ /*
+ * Don't wait longer than a second if the caller
+ * didn't ask us to wait.
+ */
+ timeout = USEC_PER_SEC;
+ while (num_online_cpus() > 1 && (wait || timeout--))
+ udelay(1);
+ }
+
+ local_irq_save(flags);
+ disable_local_APIC();
+ local_irq_restore(flags);
+}
+
/*
* this function calls the 'stop' function on all other CPUs in the system.
*/
@@ -159,7 +214,7 @@ asmlinkage void smp_reboot_interrupt(void)
irq_exit();
}
-static void native_stop_other_cpus(int wait)
+static void native_irq_stop_other_cpus(int wait)
{
unsigned long flags;
unsigned long timeout;
@@ -229,7 +284,7 @@ struct smp_ops smp_ops = {
.smp_prepare_cpus = native_smp_prepare_cpus,
.smp_cpus_done = native_smp_cpus_done,
- .stop_other_cpus = native_stop_other_cpus,
+ .stop_other_cpus = native_nmi_stop_other_cpus,
.smp_send_reschedule = native_smp_send_reschedule,
.cpu_up = native_cpu_up,
--
1.7.6.4
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [v2 PATCH 2/3] x86, NMI: Add NMI IPI selftest
2011-10-13 19:14 [v2 PATCH 0/3] Use NMI to stop cpus Don Zickus
2011-10-13 19:14 ` [v2 PATCH 1/3] x86, reboot: Use NMI instead of REBOOT_VECTOR " Don Zickus
@ 2011-10-13 19:14 ` Don Zickus
2011-12-05 13:22 ` [tip:x86/debug] " tip-bot for Don Zickus
2011-10-13 19:14 ` [v2 PATCH 3/3] x86, NMI: knob to disable using NMI IPIs to stop cpus Don Zickus
2011-11-08 19:25 ` [v2 PATCH 0/3] Use NMI " Don Zickus
3 siblings, 1 reply; 21+ messages in thread
From: Don Zickus @ 2011-10-13 19:14 UTC (permalink / raw)
To: Ingo Molnar, Andi Kleen, x86
Cc: LKML, Peter Zijlstra, Robert Richter, Andrew Morton,
seiji.aguchi, vgoyal, mjg, tony.luck, gong.chen, satoru.moriya,
avi, Don Zickus
The previous patch modified the stop cpus path to use NMI instead of IRQ
as the way to communicate to the other cpus to shutdown. There were some
concerns that various machines may have problems with using an NMI IPI.
This patch creates a selftest to check if NMI is working at boot.
The idea is to help catch any issues before the machine panics and we
learn the hard way.
Loosely based on the locking-selftest.c file, this separate file runs a
couple of simple tests and reports the results. The output looks like:
...
Brought up 4 CPUs
----------------
| NMI testsuite:
--------------------
remote IPI: ok |
local IPI: ok |
--------------------
Good, all 2 testcases passed! |
---------------------------------
Total of 4 processors activated (21330.61 BogoMIPS).
...
Signed-off-by: Don Zickus <dzickus@redhat.com>
---
arch/x86/Kconfig.debug | 12 +++
arch/x86/include/asm/smp.h | 6 ++
arch/x86/kernel/Makefile | 1 +
arch/x86/kernel/nmi_selftest.c | 179 ++++++++++++++++++++++++++++++++++++++++
arch/x86/kernel/smpboot.c | 1 +
5 files changed, 199 insertions(+), 0 deletions(-)
create mode 100644 arch/x86/kernel/nmi_selftest.c
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index c0f8a5c..020a4f1 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -284,4 +284,16 @@ config DEBUG_STRICT_USER_COPY_CHECKS
If unsure, or if you run an older (pre 4.4) gcc, say N.
+config DEBUG_NMI_SELFTEST
+ bool "NMI Selftest"
+ depends on DEBUG_KERNEL
+ ---help---
+ Enabling this option turns on a quick NMI selftest to verify
+ that the NMI behaves correctly.
+
+ This might help diagnose strange hangs that rely on NMI to
+ function properly.
+
+ If unsure, say N.
+
endmenu
diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h
index 73b11bc..0434c40 100644
--- a/arch/x86/include/asm/smp.h
+++ b/arch/x86/include/asm/smp.h
@@ -225,5 +225,11 @@ extern int hard_smp_processor_id(void);
#endif /* CONFIG_X86_LOCAL_APIC */
+#ifdef CONFIG_DEBUG_NMI_SELFTEST
+extern void nmi_selftest(void);
+#else
+#define nmi_selftest() do { } while (0)
+#endif
+
#endif /* __ASSEMBLY__ */
#endif /* _ASM_X86_SMP_H */
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 8baca3c..02b2f05 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -80,6 +80,7 @@ obj-$(CONFIG_APB_TIMER) += apb_timer.o
obj-$(CONFIG_AMD_NB) += amd_nb.o
obj-$(CONFIG_DEBUG_RODATA_TEST) += test_rodata.o
obj-$(CONFIG_DEBUG_NX_TEST) += test_nx.o
+obj-$(CONFIG_DEBUG_NMI_SELFTEST) += nmi_selftest.o
obj-$(CONFIG_KVM_GUEST) += kvm.o
obj-$(CONFIG_KVM_CLOCK) += kvmclock.o
diff --git a/arch/x86/kernel/nmi_selftest.c b/arch/x86/kernel/nmi_selftest.c
new file mode 100644
index 0000000..572adb6
--- /dev/null
+++ b/arch/x86/kernel/nmi_selftest.c
@@ -0,0 +1,179 @@
+/*
+ * arch/x86/kernel/nmi-selftest.c
+ *
+ * Testsuite for NMI: IPIs
+ *
+ * Started by Don Zickus:
+ * (using lib/locking-selftest.c as a guide)
+ *
+ * Copyright (C) 2011 Red Hat, Inc., Don Zickus <dzickus@redhat.com>
+ */
+
+#include <linux/smp.h>
+#include <linux/cpumask.h>
+#include <linux/delay.h>
+
+#include <asm/apic.h>
+#include <asm/nmi.h>
+
+#define SUCCESS 0
+#define FAILURE 1
+#define TIMEOUT 2
+
+static int nmi_fail;
+
+/* check to see if NMI IPIs work on this machine */
+static DECLARE_BITMAP(nmi_ipi_mask, NR_CPUS) __read_mostly;
+
+static int testcase_total;
+static int testcase_successes;
+static int expected_testcase_failures;
+static int unexpected_testcase_failures;
+static int unexpected_testcase_unknowns;
+
+static int nmi_unk_cb(unsigned int val, struct pt_regs *regs)
+{
+ unexpected_testcase_unknowns++;
+ return NMI_HANDLED;
+}
+
+static void init_nmi_testsuite(void)
+{
+ /* trap all the unknown NMIs we may generate */
+ register_nmi_handler(NMI_UNKNOWN, nmi_unk_cb, 0, "nmi_selftest_unk");
+}
+
+static void cleanup_nmi_testsuite(void)
+{
+ unregister_nmi_handler(NMI_UNKNOWN, "nmi_selftest_unk");
+}
+
+static int test_nmi_ipi_callback(unsigned int val, struct pt_regs *regs)
+{
+ int cpu = raw_smp_processor_id();
+
+ if (cpumask_test_and_clear_cpu(cpu, to_cpumask(nmi_ipi_mask)))
+ return NMI_HANDLED;
+
+ return NMI_DONE;
+}
+
+static void test_nmi_ipi(struct cpumask *mask)
+{
+ unsigned long timeout;
+
+ if (register_nmi_handler(NMI_LOCAL, test_nmi_ipi_callback,
+ NMI_FLAG_FIRST, "nmi_selftest")) {
+ nmi_fail = FAILURE;
+ return;
+ }
+
+ /* sync above data before sending NMI */
+ wmb();
+
+ apic->send_IPI_mask(mask, NMI_VECTOR);
+
+ /* Don't wait longer than a second */
+ timeout = USEC_PER_SEC;
+ while (!cpumask_empty(mask) && timeout--)
+ udelay(1);
+
+ /* What happens if we timeout, do we still unregister?? */
+ unregister_nmi_handler(NMI_LOCAL, "nmi_selftest");
+
+ if (!timeout)
+ nmi_fail = TIMEOUT;
+ return;
+}
+
+static void remote_ipi(void)
+{
+ cpumask_copy(to_cpumask(nmi_ipi_mask), cpu_online_mask);
+ cpumask_clear_cpu(smp_processor_id(), to_cpumask(nmi_ipi_mask));
+ test_nmi_ipi(to_cpumask(nmi_ipi_mask));
+}
+
+static void local_ipi(void)
+{
+ cpumask_clear(to_cpumask(nmi_ipi_mask));
+ cpumask_set_cpu(smp_processor_id(), to_cpumask(nmi_ipi_mask));
+ test_nmi_ipi(to_cpumask(nmi_ipi_mask));
+}
+
+static void reset_nmi(void)
+{
+ nmi_fail = 0;
+}
+
+static void dotest(void (*testcase_fn)(void), int expected)
+{
+ testcase_fn();
+ /*
+ * Filter out expected failures:
+ */
+ if (nmi_fail != expected) {
+ unexpected_testcase_failures++;
+
+ if (nmi_fail == FAILURE)
+ printk("FAILED |");
+ else if (nmi_fail == TIMEOUT)
+ printk("TIMEOUT|");
+ else
+ printk("ERROR |");
+ dump_stack();
+ } else {
+ testcase_successes++;
+ printk(" ok |");
+ }
+ testcase_total++;
+
+ reset_nmi();
+}
+
+static inline void print_testname(const char *testname)
+{
+ printk("%12s:", testname);
+}
+
+void nmi_selftest(void)
+{
+ init_nmi_testsuite();
+
+ /*
+ * Run the testsuite:
+ */
+ printk("----------------\n");
+ printk("| NMI testsuite:\n");
+ printk("--------------------\n");
+
+ print_testname("remote IPI");
+ dotest(remote_ipi, SUCCESS);
+ printk("\n");
+ print_testname("local IPI");
+ dotest(local_ipi, SUCCESS);
+ printk("\n");
+
+ cleanup_nmi_testsuite();
+
+ if (unexpected_testcase_failures) {
+ printk("--------------------\n");
+ printk("BUG: %3d unexpected failures (out of %3d) - debugging disabled! |\n",
+ unexpected_testcase_failures, testcase_total);
+ printk("-----------------------------------------------------------------\n");
+ } else if (expected_testcase_failures && testcase_successes) {
+ printk("--------------------\n");
+ printk("%3d out of %3d testcases failed, as expected. |\n",
+ expected_testcase_failures, testcase_total);
+ printk("----------------------------------------------------\n");
+ } else if (expected_testcase_failures && !testcase_successes) {
+ printk("--------------------\n");
+ printk("All %3d testcases failed, as expected. |\n",
+ expected_testcase_failures);
+ printk("----------------------------------------\n");
+ } else {
+ printk("--------------------\n");
+ printk("Good, all %3d testcases passed! |\n",
+ testcase_successes);
+ printk("---------------------------------\n");
+ }
+}
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 9f548cb..1927781 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1142,6 +1142,7 @@ void __init native_smp_cpus_done(unsigned int max_cpus)
{
pr_debug("Boot done.\n");
+ nmi_selftest();
impress_friends();
#ifdef CONFIG_X86_IO_APIC
setup_ioapic_dest();
--
1.7.6.4
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [v2 PATCH 3/3] x86, NMI: knob to disable using NMI IPIs to stop cpus
2011-10-13 19:14 [v2 PATCH 0/3] Use NMI to stop cpus Don Zickus
2011-10-13 19:14 ` [v2 PATCH 1/3] x86, reboot: Use NMI instead of REBOOT_VECTOR " Don Zickus
2011-10-13 19:14 ` [v2 PATCH 2/3] x86, NMI: Add NMI IPI selftest Don Zickus
@ 2011-10-13 19:14 ` Don Zickus
2011-12-05 13:23 ` [tip:x86/debug] x86, NMI: Add " tip-bot for Don Zickus
2011-11-08 19:25 ` [v2 PATCH 0/3] Use NMI " Don Zickus
3 siblings, 1 reply; 21+ messages in thread
From: Don Zickus @ 2011-10-13 19:14 UTC (permalink / raw)
To: Ingo Molnar, Andi Kleen, x86
Cc: LKML, Peter Zijlstra, Robert Richter, Andrew Morton,
seiji.aguchi, vgoyal, mjg, tony.luck, gong.chen, satoru.moriya,
avi, Don Zickus
Some machines may exhibit problems using the NMI to stop other cpus.
This knob just allows one to revert back to the original behaviour to help
diagnose the problem.
V2:
make function static
Signed-off-by: Don Zickus <dzickus@redhat.com>
---
Documentation/kernel-parameters.txt | 4 ++++
arch/x86/kernel/smp.c | 13 +++++++++++++
2 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 6ca1f5c..dab6439 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1761,6 +1761,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
nomfgpt [X86-32] Disable Multi-Function General Purpose
Timer usage (for AMD Geode machines).
+ nonmi_ipi [X86] Disable using NMI IPIs during panic/reboot to
+ shutdown the other cpus. Instead use the REBOOT_VECTOR
+ irq.
+
nopat [X86] Disable PAT (page attribute table extension of
pagetables) support.
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index 991d184..f96d32d 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -248,6 +248,11 @@ static void native_irq_stop_other_cpus(int wait)
local_irq_restore(flags);
}
+static void native_smp_disable_nmi_ipi(void)
+{
+ smp_ops.stop_other_cpus = native_irq_stop_other_cpus;
+}
+
/*
* Reschedule call back.
*/
@@ -279,6 +284,14 @@ void smp_call_function_single_interrupt(struct pt_regs *regs)
irq_exit();
}
+static int __init nonmi_ipi_setup(char *str)
+{
+ native_smp_disable_nmi_ipi();
+ return 1;
+}
+
+__setup("nonmi_ipi", nonmi_ipi_setup);
+
struct smp_ops smp_ops = {
.smp_prepare_boot_cpu = native_smp_prepare_boot_cpu,
.smp_prepare_cpus = native_smp_prepare_cpus,
--
1.7.6.4
^ permalink raw reply related [flat|nested] 21+ messages in thread
* Re: [v2 PATCH 0/3] Use NMI to stop cpus
2011-10-13 19:14 [v2 PATCH 0/3] Use NMI to stop cpus Don Zickus
` (2 preceding siblings ...)
2011-10-13 19:14 ` [v2 PATCH 3/3] x86, NMI: knob to disable using NMI IPIs to stop cpus Don Zickus
@ 2011-11-08 19:25 ` Don Zickus
3 siblings, 0 replies; 21+ messages in thread
From: Don Zickus @ 2011-11-08 19:25 UTC (permalink / raw)
To: Ingo Molnar, Andi Kleen, x86
Cc: LKML, Peter Zijlstra, Robert Richter, Andrew Morton,
seiji.aguchi, vgoyal, mjg, tony.luck, gong.chen, satoru.moriya,
avi
On Thu, Oct 13, 2011 at 03:14:24PM -0400, Don Zickus wrote:
> This patch series attempts to use NMI to stop cpus instead of the
> REBOOT_VECTOR irq. The idea is to have a more robust and reliable
> way to stop cpus when serializing things like the panic path.
poke? Any feedback on this now that rc-1 is out and things hopefully
calmed down a bit. :-)
Cheers,
Don
>
> More details in the changelogs.
>
> Don Zickus (3):
> x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpus
> x86, NMI: Add NMI IPI selftest
> x86, NMI: knob to disable using NMI IPIs to stop cpus
>
> Documentation/kernel-parameters.txt | 4 +
> arch/x86/Kconfig.debug | 12 +++
> arch/x86/include/asm/smp.h | 6 +
> arch/x86/kernel/Makefile | 1 +
> arch/x86/kernel/nmi_selftest.c | 179 +++++++++++++++++++++++++++++++++++
> arch/x86/kernel/smp.c | 72 ++++++++++++++-
> arch/x86/kernel/smpboot.c | 1 +
> 7 files changed, 273 insertions(+), 2 deletions(-)
> create mode 100644 arch/x86/kernel/nmi_selftest.c
>
> --
> 1.7.6.4
>
^ permalink raw reply [flat|nested] 21+ messages in thread
* [tip:x86/debug] x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpus
2011-10-13 19:14 ` [v2 PATCH 1/3] x86, reboot: Use NMI instead of REBOOT_VECTOR " Don Zickus
@ 2011-12-05 13:21 ` tip-bot for Don Zickus
2011-12-20 22:38 ` Yinghai Lu
0 siblings, 1 reply; 21+ messages in thread
From: tip-bot for Don Zickus @ 2011-12-05 13:21 UTC (permalink / raw)
To: linux-tip-commits
Cc: linux-kernel, hpa, mingo, andi, torvalds, peterz, robert.richter,
tglx, mingo, dzickus
Commit-ID: 3603a2512f9e69dc87914ba922eb4a0812b21cd6
Gitweb: http://git.kernel.org/tip/3603a2512f9e69dc87914ba922eb4a0812b21cd6
Author: Don Zickus <dzickus@redhat.com>
AuthorDate: Thu, 13 Oct 2011 15:14:25 -0400
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Mon, 5 Dec 2011 12:00:14 +0100
x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpus
A recent discussion started talking about the locking on the
pstore fs and how it relates to the kmsg infrastructure. We
noticed it was possible for userspace to r/w to the pstore fs
(grabbing the locks in the process) and block the panic path
from r/w to the same fs.
The reason was the cpu with the lock could be doing work while
the crashing cpu is panic'ing. Busting those spinlocks might
cause those cpus to step on each other's data. Fine, fair
enough.
It was suggested it would be nice to serialize the panic path
(ie stop the other cpus) and have only one cpu running. This
would allow us to bust the spinlocks and not worry about another
cpu stepping on the data.
Of course, smp_send_stop() does this in the panic case.
kmsg_dump() would have to be moved to be called after it. Easy
enough.
The only problem is on x86 the smp_send_stop() function calls
the REBOOT_VECTOR. Any cpu with irqs disabled (which pstore and
its backend ERST would do), block this IPI and thus do not stop.
This makes it difficult to reliably log data to the pstore fs.
The patch below switches from the REBOOT_VECTOR to NMI (and
mimics what kdump does). Switching to NMI allows us to deliver
the IPI when irqs are disabled, increasing the reliability of
this function.
However, Andi carefully noted that on some machines this
approach does not work because of broken BIOSes or whatever.
To help accomodate this, the next couple of patches will run a
selftest and provide a knob to disable.
V2:
uses atomic ops to serialize the cpu that shuts everyone down
V3:
comment cleanup
Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robert Richter <robert.richter@amd.com>
Cc: seiji.aguchi@hds.com
Cc: vgoyal@redhat.com
Cc: mjg@redhat.com
Cc: tony.luck@intel.com
Cc: gong.chen@intel.com
Cc: satoru.moriya@hds.com
Cc: avi@redhat.com
Cc: Andi Kleen <andi@firstfloor.org>
Link: http://lkml.kernel.org/r/1318533267-18880-2-git-send-email-dzickus@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86/kernel/smp.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 57 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index 16204dc..e72b175 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -29,6 +29,7 @@
#include <asm/mmu_context.h>
#include <asm/proto.h>
#include <asm/apic.h>
+#include <asm/nmi.h>
/*
* Some notes on x86 processor bugs affecting SMP operation:
*
@@ -148,6 +149,60 @@ void native_send_call_func_ipi(const struct cpumask *mask)
free_cpumask_var(allbutself);
}
+static atomic_t stopping_cpu = ATOMIC_INIT(-1);
+
+static int smp_stop_nmi_callback(unsigned int val, struct pt_regs *regs)
+{
+ /* We are registered on stopping cpu too, avoid spurious NMI */
+ if (raw_smp_processor_id() == atomic_read(&stopping_cpu))
+ return NMI_HANDLED;
+
+ stop_this_cpu(NULL);
+
+ return NMI_HANDLED;
+}
+
+static void native_nmi_stop_other_cpus(int wait)
+{
+ unsigned long flags;
+ unsigned long timeout;
+
+ if (reboot_force)
+ return;
+
+ /*
+ * Use an own vector here because smp_call_function
+ * does lots of things not suitable in a panic situation.
+ */
+ if (num_online_cpus() > 1) {
+ /* did someone beat us here? */
+ if (atomic_cmpxchg(&stopping_cpu, -1, safe_smp_processor_id() != -1))
+ return;
+
+ if (register_nmi_handler(NMI_LOCAL, smp_stop_nmi_callback,
+ NMI_FLAG_FIRST, "smp_stop"))
+ /* Note: we ignore failures here */
+ return;
+
+ /* sync above data before sending NMI */
+ wmb();
+
+ apic->send_IPI_allbutself(NMI_VECTOR);
+
+ /*
+ * Don't wait longer than a second if the caller
+ * didn't ask us to wait.
+ */
+ timeout = USEC_PER_SEC;
+ while (num_online_cpus() > 1 && (wait || timeout--))
+ udelay(1);
+ }
+
+ local_irq_save(flags);
+ disable_local_APIC();
+ local_irq_restore(flags);
+}
+
/*
* this function calls the 'stop' function on all other CPUs in the system.
*/
@@ -160,7 +215,7 @@ asmlinkage void smp_reboot_interrupt(void)
irq_exit();
}
-static void native_stop_other_cpus(int wait)
+static void native_irq_stop_other_cpus(int wait)
{
unsigned long flags;
unsigned long timeout;
@@ -230,7 +285,7 @@ struct smp_ops smp_ops = {
.smp_prepare_cpus = native_smp_prepare_cpus,
.smp_cpus_done = native_smp_cpus_done,
- .stop_other_cpus = native_stop_other_cpus,
+ .stop_other_cpus = native_nmi_stop_other_cpus,
.smp_send_reschedule = native_smp_send_reschedule,
.cpu_up = native_cpu_up,
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [tip:x86/debug] x86, NMI: Add NMI IPI selftest
2011-10-13 19:14 ` [v2 PATCH 2/3] x86, NMI: Add NMI IPI selftest Don Zickus
@ 2011-12-05 13:22 ` tip-bot for Don Zickus
2011-12-06 9:06 ` Ingo Molnar
0 siblings, 1 reply; 21+ messages in thread
From: tip-bot for Don Zickus @ 2011-12-05 13:22 UTC (permalink / raw)
To: linux-tip-commits
Cc: linux-kernel, hpa, mingo, andi, torvalds, peterz, robert.richter,
tglx, mingo, dzickus
Commit-ID: 99e8b9ca90d688c3ac7d3a141b701c9694a93925
Gitweb: http://git.kernel.org/tip/99e8b9ca90d688c3ac7d3a141b701c9694a93925
Author: Don Zickus <dzickus@redhat.com>
AuthorDate: Thu, 13 Oct 2011 15:14:26 -0400
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Mon, 5 Dec 2011 12:00:16 +0100
x86, NMI: Add NMI IPI selftest
The previous patch modified the stop cpus path to use NMI
instead of IRQ as the way to communicate to the other cpus to
shutdown. There were some concerns that various machines may
have problems with using an NMI IPI.
This patch creates a selftest to check if NMI is working at
boot. The idea is to help catch any issues before the machine
panics and we learn the hard way.
Loosely based on the locking-selftest.c file, this separate file
runs a couple of simple tests and reports the results. The
output looks like:
...
Brought up 4 CPUs
----------------
| NMI testsuite:
--------------------
remote IPI: ok |
local IPI: ok |
--------------------
Good, all 2 testcases passed! |
---------------------------------
Total of 4 processors activated (21330.61 BogoMIPS).
...
Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robert Richter <robert.richter@amd.com>
Cc: seiji.aguchi@hds.com
Cc: vgoyal@redhat.com
Cc: mjg@redhat.com
Cc: tony.luck@intel.com
Cc: gong.chen@intel.com
Cc: satoru.moriya@hds.com
Cc: avi@redhat.com
Cc: Andi Kleen <andi@firstfloor.org>
Link: http://lkml.kernel.org/r/1318533267-18880-3-git-send-email-dzickus@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86/Kconfig.debug | 12 +++
arch/x86/include/asm/smp.h | 6 ++
arch/x86/kernel/Makefile | 1 +
arch/x86/kernel/nmi_selftest.c | 179 ++++++++++++++++++++++++++++++++++++++++
arch/x86/kernel/smpboot.c | 1 +
5 files changed, 199 insertions(+), 0 deletions(-)
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 4caec12..97da3c1 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -287,4 +287,16 @@ config DEBUG_STRICT_USER_COPY_CHECKS
If unsure, or if you run an older (pre 4.4) gcc, say N.
+config DEBUG_NMI_SELFTEST
+ bool "NMI Selftest"
+ depends on DEBUG_KERNEL
+ ---help---
+ Enabling this option turns on a quick NMI selftest to verify
+ that the NMI behaves correctly.
+
+ This might help diagnose strange hangs that rely on NMI to
+ function properly.
+
+ If unsure, say N.
+
endmenu
diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h
index 73b11bc..0434c40 100644
--- a/arch/x86/include/asm/smp.h
+++ b/arch/x86/include/asm/smp.h
@@ -225,5 +225,11 @@ extern int hard_smp_processor_id(void);
#endif /* CONFIG_X86_LOCAL_APIC */
+#ifdef CONFIG_DEBUG_NMI_SELFTEST
+extern void nmi_selftest(void);
+#else
+#define nmi_selftest() do { } while (0)
+#endif
+
#endif /* __ASSEMBLY__ */
#endif /* _ASM_X86_SMP_H */
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 8baca3c..02b2f05 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -80,6 +80,7 @@ obj-$(CONFIG_APB_TIMER) += apb_timer.o
obj-$(CONFIG_AMD_NB) += amd_nb.o
obj-$(CONFIG_DEBUG_RODATA_TEST) += test_rodata.o
obj-$(CONFIG_DEBUG_NX_TEST) += test_nx.o
+obj-$(CONFIG_DEBUG_NMI_SELFTEST) += nmi_selftest.o
obj-$(CONFIG_KVM_GUEST) += kvm.o
obj-$(CONFIG_KVM_CLOCK) += kvmclock.o
diff --git a/arch/x86/kernel/nmi_selftest.c b/arch/x86/kernel/nmi_selftest.c
new file mode 100644
index 0000000..572adb6
--- /dev/null
+++ b/arch/x86/kernel/nmi_selftest.c
@@ -0,0 +1,179 @@
+/*
+ * arch/x86/kernel/nmi-selftest.c
+ *
+ * Testsuite for NMI: IPIs
+ *
+ * Started by Don Zickus:
+ * (using lib/locking-selftest.c as a guide)
+ *
+ * Copyright (C) 2011 Red Hat, Inc., Don Zickus <dzickus@redhat.com>
+ */
+
+#include <linux/smp.h>
+#include <linux/cpumask.h>
+#include <linux/delay.h>
+
+#include <asm/apic.h>
+#include <asm/nmi.h>
+
+#define SUCCESS 0
+#define FAILURE 1
+#define TIMEOUT 2
+
+static int nmi_fail;
+
+/* check to see if NMI IPIs work on this machine */
+static DECLARE_BITMAP(nmi_ipi_mask, NR_CPUS) __read_mostly;
+
+static int testcase_total;
+static int testcase_successes;
+static int expected_testcase_failures;
+static int unexpected_testcase_failures;
+static int unexpected_testcase_unknowns;
+
+static int nmi_unk_cb(unsigned int val, struct pt_regs *regs)
+{
+ unexpected_testcase_unknowns++;
+ return NMI_HANDLED;
+}
+
+static void init_nmi_testsuite(void)
+{
+ /* trap all the unknown NMIs we may generate */
+ register_nmi_handler(NMI_UNKNOWN, nmi_unk_cb, 0, "nmi_selftest_unk");
+}
+
+static void cleanup_nmi_testsuite(void)
+{
+ unregister_nmi_handler(NMI_UNKNOWN, "nmi_selftest_unk");
+}
+
+static int test_nmi_ipi_callback(unsigned int val, struct pt_regs *regs)
+{
+ int cpu = raw_smp_processor_id();
+
+ if (cpumask_test_and_clear_cpu(cpu, to_cpumask(nmi_ipi_mask)))
+ return NMI_HANDLED;
+
+ return NMI_DONE;
+}
+
+static void test_nmi_ipi(struct cpumask *mask)
+{
+ unsigned long timeout;
+
+ if (register_nmi_handler(NMI_LOCAL, test_nmi_ipi_callback,
+ NMI_FLAG_FIRST, "nmi_selftest")) {
+ nmi_fail = FAILURE;
+ return;
+ }
+
+ /* sync above data before sending NMI */
+ wmb();
+
+ apic->send_IPI_mask(mask, NMI_VECTOR);
+
+ /* Don't wait longer than a second */
+ timeout = USEC_PER_SEC;
+ while (!cpumask_empty(mask) && timeout--)
+ udelay(1);
+
+ /* What happens if we timeout, do we still unregister?? */
+ unregister_nmi_handler(NMI_LOCAL, "nmi_selftest");
+
+ if (!timeout)
+ nmi_fail = TIMEOUT;
+ return;
+}
+
+static void remote_ipi(void)
+{
+ cpumask_copy(to_cpumask(nmi_ipi_mask), cpu_online_mask);
+ cpumask_clear_cpu(smp_processor_id(), to_cpumask(nmi_ipi_mask));
+ test_nmi_ipi(to_cpumask(nmi_ipi_mask));
+}
+
+static void local_ipi(void)
+{
+ cpumask_clear(to_cpumask(nmi_ipi_mask));
+ cpumask_set_cpu(smp_processor_id(), to_cpumask(nmi_ipi_mask));
+ test_nmi_ipi(to_cpumask(nmi_ipi_mask));
+}
+
+static void reset_nmi(void)
+{
+ nmi_fail = 0;
+}
+
+static void dotest(void (*testcase_fn)(void), int expected)
+{
+ testcase_fn();
+ /*
+ * Filter out expected failures:
+ */
+ if (nmi_fail != expected) {
+ unexpected_testcase_failures++;
+
+ if (nmi_fail == FAILURE)
+ printk("FAILED |");
+ else if (nmi_fail == TIMEOUT)
+ printk("TIMEOUT|");
+ else
+ printk("ERROR |");
+ dump_stack();
+ } else {
+ testcase_successes++;
+ printk(" ok |");
+ }
+ testcase_total++;
+
+ reset_nmi();
+}
+
+static inline void print_testname(const char *testname)
+{
+ printk("%12s:", testname);
+}
+
+void nmi_selftest(void)
+{
+ init_nmi_testsuite();
+
+ /*
+ * Run the testsuite:
+ */
+ printk("----------------\n");
+ printk("| NMI testsuite:\n");
+ printk("--------------------\n");
+
+ print_testname("remote IPI");
+ dotest(remote_ipi, SUCCESS);
+ printk("\n");
+ print_testname("local IPI");
+ dotest(local_ipi, SUCCESS);
+ printk("\n");
+
+ cleanup_nmi_testsuite();
+
+ if (unexpected_testcase_failures) {
+ printk("--------------------\n");
+ printk("BUG: %3d unexpected failures (out of %3d) - debugging disabled! |\n",
+ unexpected_testcase_failures, testcase_total);
+ printk("-----------------------------------------------------------------\n");
+ } else if (expected_testcase_failures && testcase_successes) {
+ printk("--------------------\n");
+ printk("%3d out of %3d testcases failed, as expected. |\n",
+ expected_testcase_failures, testcase_total);
+ printk("----------------------------------------------------\n");
+ } else if (expected_testcase_failures && !testcase_successes) {
+ printk("--------------------\n");
+ printk("All %3d testcases failed, as expected. |\n",
+ expected_testcase_failures);
+ printk("----------------------------------------\n");
+ } else {
+ printk("--------------------\n");
+ printk("Good, all %3d testcases passed! |\n",
+ testcase_successes);
+ printk("---------------------------------\n");
+ }
+}
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 9f548cb..1927781 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1142,6 +1142,7 @@ void __init native_smp_cpus_done(unsigned int max_cpus)
{
pr_debug("Boot done.\n");
+ nmi_selftest();
impress_friends();
#ifdef CONFIG_X86_IO_APIC
setup_ioapic_dest();
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [tip:x86/debug] x86, NMI: Add knob to disable using NMI IPIs to stop cpus
2011-10-13 19:14 ` [v2 PATCH 3/3] x86, NMI: knob to disable using NMI IPIs to stop cpus Don Zickus
@ 2011-12-05 13:23 ` tip-bot for Don Zickus
0 siblings, 0 replies; 21+ messages in thread
From: tip-bot for Don Zickus @ 2011-12-05 13:23 UTC (permalink / raw)
To: linux-tip-commits
Cc: linux-kernel, hpa, mingo, andi, torvalds, peterz, robert.richter,
tglx, mingo, dzickus
Commit-ID: bda62633983f9db49ce0b1a9235b3709c1cda5f0
Gitweb: http://git.kernel.org/tip/bda62633983f9db49ce0b1a9235b3709c1cda5f0
Author: Don Zickus <dzickus@redhat.com>
AuthorDate: Thu, 13 Oct 2011 15:14:27 -0400
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Mon, 5 Dec 2011 12:00:23 +0100
x86, NMI: Add knob to disable using NMI IPIs to stop cpus
Some machines may exhibit problems using the NMI to stop other
cpus. This knob just allows one to revert back to the original
behaviour to help diagnose the problem.
V2:
make function static
Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robert Richter <robert.richter@amd.com>
Cc: seiji.aguchi@hds.com
Cc: vgoyal@redhat.com
Cc: mjg@redhat.com
Cc: tony.luck@intel.com
Cc: gong.chen@intel.com
Cc: satoru.moriya@hds.com
Cc: avi@redhat.com
Cc: Andi Kleen <andi@firstfloor.org>
Link: http://lkml.kernel.org/r/1318533267-18880-4-git-send-email-dzickus@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
Documentation/kernel-parameters.txt | 4 ++++
arch/x86/kernel/smp.c | 13 +++++++++++++
2 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index a0c5c5f..b4339e5 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1796,6 +1796,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
nomfgpt [X86-32] Disable Multi-Function General Purpose
Timer usage (for AMD Geode machines).
+ nonmi_ipi [X86] Disable using NMI IPIs during panic/reboot to
+ shutdown the other cpus. Instead use the REBOOT_VECTOR
+ irq.
+
nopat [X86] Disable PAT (page attribute table extension of
pagetables) support.
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index e72b175..113acda 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -249,6 +249,11 @@ static void native_irq_stop_other_cpus(int wait)
local_irq_restore(flags);
}
+static void native_smp_disable_nmi_ipi(void)
+{
+ smp_ops.stop_other_cpus = native_irq_stop_other_cpus;
+}
+
/*
* Reschedule call back.
*/
@@ -280,6 +285,14 @@ void smp_call_function_single_interrupt(struct pt_regs *regs)
irq_exit();
}
+static int __init nonmi_ipi_setup(char *str)
+{
+ native_smp_disable_nmi_ipi();
+ return 1;
+}
+
+__setup("nonmi_ipi", nonmi_ipi_setup);
+
struct smp_ops smp_ops = {
.smp_prepare_boot_cpu = native_smp_prepare_boot_cpu,
.smp_prepare_cpus = native_smp_prepare_cpus,
^ permalink raw reply related [flat|nested] 21+ messages in thread
* Re: [tip:x86/debug] x86, NMI: Add NMI IPI selftest
2011-12-05 13:22 ` [tip:x86/debug] " tip-bot for Don Zickus
@ 2011-12-06 9:06 ` Ingo Molnar
2011-12-06 18:08 ` Don Zickus
0 siblings, 1 reply; 21+ messages in thread
From: Ingo Molnar @ 2011-12-06 9:06 UTC (permalink / raw)
To: mingo, hpa, linux-kernel, andi, torvalds, peterz, robert.richter,
tglx, dzickus
Cc: linux-tip-commits
[-- Attachment #1: Type: text/plain, Size: 2867 bytes --]
* tip-bot for Don Zickus <dzickus@redhat.com> wrote:
> Commit-ID: 99e8b9ca90d688c3ac7d3a141b701c9694a93925
> Gitweb: http://git.kernel.org/tip/99e8b9ca90d688c3ac7d3a141b701c9694a93925
> Author: Don Zickus <dzickus@redhat.com>
> AuthorDate: Thu, 13 Oct 2011 15:14:26 -0400
> Committer: Ingo Molnar <mingo@elte.hu>
> CommitDate: Mon, 5 Dec 2011 12:00:16 +0100
>
> x86, NMI: Add NMI IPI selftest
The NMI test-suite has caught some badness:
[ 0.179992] calling tracer_alloc_buffers+0x0/0x224 @ 1
[ 0.183417] initcall tracer_alloc_buffers+0x0/0x224 returned 0 after 0 usecs
[ 0.186658] calling init_trace_printk+0x0/0xf @ 1
[ 0.189992] initcall init_trace_printk+0x0/0xf returned 0 after 0 usecs
[ 0.193324] Brought up 1 CPUs
[ 0.196657] ----------------
[ 0.199989] | NMI testsuite:
[ 0.203322] --------------------
[ 0.206655] remote IPI:
[ 0.209991] ------------[ cut here ]------------
[ 0.213325] WARNING: at arch/x86/kernel/apic/ipi.c:109 default_send_IPI_mask_logical+0xdb/0x120()
[ 0.216655] Hardware name: System Product Name
[ 0.219987] empty IPI mask
[ 0.223321] Modules linked in:
[ 0.227015] Pid: 1, comm: swapper/0 Tainted: G W 3.2.0-rc4-tip+ #163124
[ 0.229987] Call Trace:
[ 0.233326] [<c102e2a2>] warn_slowpath_common+0x72/0xa0
[ 0.236656] [<c101e04b>] ? default_send_IPI_mask_logical+0xdb/0x120
[ 0.239989] [<c101e04b>] ? default_send_IPI_mask_logical+0xdb/0x120
[ 0.243321] [<c102e373>] warn_slowpath_fmt+0x33/0x40
[ 0.246655] [<c101e04b>] default_send_IPI_mask_logical+0xdb/0x120
[ 0.249988] [<c1024025>] test_nmi_ipi.constprop.2+0x55/0xb0
[ 0.253320] [<c10240c8>] remote_ipi+0x48/0x80
[ 0.256654] [<c102417d>] dotest.constprop.3+0xd/0x90
[ 0.259987] [<c1024265>] nmi_selftest+0x65/0x120
[ 0.263320] [<c14d4e73>] native_smp_cpus_done+0x15/0xff
[ 0.266653] [<c14ddf3f>] smp_init+0xdb/0xe2
[ 0.269988] [<c14cb7bb>] ? start_kernel+0x386/0x386
[ 0.273320] [<c14cb81d>] kernel_init+0x62/0x118
[ 0.276653] [<c138bb3e>] kernel_thread_helper+0x6/0x10
[ 0.279985] ---[ end trace a7919e7f17c0a726 ]---
[ 0.283318] ok |
[ 0.287008] local IPI: ok |
[ 0.293675] --------------------
[ 0.296650] Good, all 2 testcases passed! |
[ 0.299982] ---------------------------------
[ 0.303317] Total of 1 processors activated (4022.62 BogoMIPS).
[ 0.306818] devtmpfs: initialized
[ 0.310004] device: 'platform': device_add
That's an empty IPI mask. NOTE the boot parameters i used:
Kernel command line: root=/dev/sda1
earlyprintk=ttyS0,115200,keep console=ttyS0,115200 debug
initcall_debug enforcing=0 apic=verbose ignore_loglevel
sysrq_always_enabled selinux=0 nmi_watchdog=0 3 panic=1 3 nosmp
highres=0 highmem=512m pci=nomsi
i think 'nosmp' might be relevant.
Config attached.
Thanks,
Ingo
[-- Attachment #2: config --]
[-- Type: text/plain, Size: 64974 bytes --]
#
# Automatically generated file; DO NOT EDIT.
# Linux/i386 3.2.0-rc4 Kernel Configuration
#
# CONFIG_64BIT is not set
CONFIG_X86_32=y
# CONFIG_X86_64 is not set
CONFIG_X86=y
CONFIG_INSTRUCTION_DECODER=y
CONFIG_OUTPUT_FORMAT="elf32-i386"
CONFIG_ARCH_DEFCONFIG="arch/x86/configs/i386_defconfig"
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_MMU=y
CONFIG_ZONE_DMA=y
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_NEED_SG_DMA_LENGTH=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_GPIO=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
# CONFIG_RWSEM_GENERIC_SPINLOCK is not set
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
# CONFIG_GENERIC_TIME_VSYSCALL is not set
CONFIG_ARCH_HAS_CPU_RELAX=y
CONFIG_ARCH_HAS_DEFAULT_IDLE=y
CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
CONFIG_HAVE_SETUP_PER_CPU_AREA=y
CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y
CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
# CONFIG_ZONE_DMA32 is not set
CONFIG_ARCH_POPULATES_NODE_MAP=y
# CONFIG_AUDIT_ARCH is not set
CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING=y
CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
CONFIG_X86_32_SMP=y
CONFIG_X86_HT=y
CONFIG_ARCH_HWEIGHT_CFLAGS="-fcall-saved-ecx -fcall-saved-edx"
CONFIG_KTIME_SCALAR=y
# CONFIG_BOOTPARAM_SUPPORT_NOT_WANTED is not set
CONFIG_BOOTPARAM_SUPPORT=y
CONFIG_ARCH_CPU_PROBE_RELEASE=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
CONFIG_HAVE_IRQ_WORK=y
CONFIG_IRQ_WORK=y
#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_BROKEN_BOOT_ALLOWED4=y
# CONFIG_BROKEN_BOOT_ALLOWED3 is not set
CONFIG_BROKEN_BOOT_DISALLOWED=y
CONFIG_BROKEN_BOOT_EUROPE=y
CONFIG_BROKEN_BOOT_TITAN=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_CROSS_COMPILE=""
CONFIG_LOCALVERSION=""
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_BZIP2=y
CONFIG_HAVE_KERNEL_LZMA=y
CONFIG_HAVE_KERNEL_XZ=y
CONFIG_HAVE_KERNEL_LZO=y
CONFIG_KERNEL_GZIP=y
# CONFIG_KERNEL_BZIP2 is not set
# CONFIG_KERNEL_LZMA is not set
# CONFIG_KERNEL_XZ is not set
# CONFIG_KERNEL_LZO is not set
CONFIG_DEFAULT_HOSTNAME="(none)"
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
# CONFIG_POSIX_MQUEUE is not set
# CONFIG_BSD_PROCESS_ACCT is not set
CONFIG_FHANDLE=y
CONFIG_TASKSTATS=y
CONFIG_TASK_DELAY_ACCT=y
# CONFIG_TASK_XACCT is not set
# CONFIG_AUDIT is not set
CONFIG_HAVE_GENERIC_HARDIRQS=y
#
# IRQ subsystem
#
CONFIG_GENERIC_HARDIRQS=y
CONFIG_HAVE_SPARSE_IRQ=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_PENDING_IRQ=y
CONFIG_GENERIC_IRQ_CHIP=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_SPARSE_IRQ=y
#
# RCU Subsystem
#
CONFIG_TREE_RCU=y
# CONFIG_PREEMPT_RCU is not set
# CONFIG_RCU_TRACE is not set
CONFIG_RCU_FANOUT=32
# CONFIG_RCU_FANOUT_EXACT is not set
# CONFIG_RCU_FAST_NO_HZ is not set
# CONFIG_TREE_RCU_TRACE is not set
# CONFIG_IKCONFIG is not set
CONFIG_LOG_BUF_SHIFT=20
CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y
CONFIG_CGROUPS=y
CONFIG_CGROUP_DEBUG=y
# CONFIG_CGROUP_FREEZER is not set
CONFIG_CGROUP_DEVICE=y
# CONFIG_CPUSETS is not set
CONFIG_CGROUP_CPUACCT=y
CONFIG_RESOURCE_COUNTERS=y
# CONFIG_CGROUP_MEM_RES_CTLR is not set
# CONFIG_CGROUP_PERF is not set
# CONFIG_CGROUP_SCHED is not set
CONFIG_BLK_CGROUP=m
# CONFIG_DEBUG_BLK_CGROUP is not set
CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_IPC_NS is not set
CONFIG_USER_NS=y
CONFIG_PID_NS=y
# CONFIG_NET_NS is not set
# CONFIG_SCHED_AUTOGROUP is not set
CONFIG_SYSFS_DEPRECATED=y
# CONFIG_SYSFS_DEPRECATED_V2 is not set
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_RD_GZIP=y
CONFIG_RD_BZIP2=y
CONFIG_RD_LZMA=y
CONFIG_RD_XZ=y
CONFIG_RD_LZO=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_SYSCTL=y
CONFIG_ANON_INODES=y
# CONFIG_EXPERT is not set
CONFIG_UID16=y
# CONFIG_SYSCTL_SYSCALL is not set
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_ALL is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_PCSPKR_PLATFORM=y
CONFIG_HAVE_PCSPKR_PLATFORM=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
# CONFIG_EMBEDDED is not set
CONFIG_HAVE_PERF_EVENTS=y
#
# Kernel Performance Events And Counters
#
CONFIG_PERF_EVENTS=y
# CONFIG_PERF_COUNTERS is not set
# CONFIG_DEBUG_PERF_USE_VMALLOC is not set
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_PCI_QUIRKS=y
CONFIG_SLUB_DEBUG=y
# CONFIG_COMPAT_BRK is not set
# CONFIG_BOOTPARAM_MAXCPUS_1 is not set
CONFIG_BOOTPARAM_NOSMP=y
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_PROFILING is not set
CONFIG_TRACEPOINTS=y
CONFIG_HAVE_OPROFILE=y
CONFIG_OPROFILE_NMI_TIMER=y
# CONFIG_KPROBES is not set
# CONFIG_JUMP_LABEL is not set
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_USER_RETURN_NOTIFIER=y
CONFIG_HAVE_IOREMAP_PROT=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_OPTPROBES=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_HAVE_DMA_ATTRS=y
CONFIG_USE_GENERIC_SMP_HELPERS=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_DMA_API_DEBUG=y
CONFIG_HAVE_HW_BREAKPOINT=y
CONFIG_HAVE_MIXED_BREAKPOINTS_REGS=y
CONFIG_HAVE_USER_RETURN_NOTIFIER=y
CONFIG_HAVE_PERF_EVENTS_NMI=y
CONFIG_HAVE_ARCH_JUMP_LABEL=y
CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG=y
#
# GCOV-based kernel profiling
#
CONFIG_HAVE_GENERIC_DMA_COHERENT=y
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
# CONFIG_MODULE_FORCE_LOAD is not set
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_STOP_MACHINE=y
CONFIG_BLOCK=y
# CONFIG_LBDAF is not set
CONFIG_BLK_DEV_BSG=y
CONFIG_BLK_DEV_BSGLIB=y
CONFIG_BLK_DEV_INTEGRITY=y
#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
# CONFIG_IOSCHED_DEADLINE is not set
# CONFIG_IOSCHED_CFQ is not set
CONFIG_DEFAULT_NOOP=y
CONFIG_DEFAULT_IOSCHED="noop"
CONFIG_PREEMPT_NOTIFIERS=y
# CONFIG_INLINE_SPIN_TRYLOCK is not set
# CONFIG_INLINE_SPIN_TRYLOCK_BH is not set
# CONFIG_INLINE_SPIN_LOCK is not set
# CONFIG_INLINE_SPIN_LOCK_BH is not set
# CONFIG_INLINE_SPIN_LOCK_IRQ is not set
# CONFIG_INLINE_SPIN_LOCK_IRQSAVE is not set
# CONFIG_INLINE_SPIN_UNLOCK is not set
# CONFIG_INLINE_SPIN_UNLOCK_BH is not set
# CONFIG_INLINE_SPIN_UNLOCK_IRQ is not set
# CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE is not set
# CONFIG_INLINE_READ_TRYLOCK is not set
# CONFIG_INLINE_READ_LOCK is not set
# CONFIG_INLINE_READ_LOCK_BH is not set
# CONFIG_INLINE_READ_LOCK_IRQ is not set
# CONFIG_INLINE_READ_LOCK_IRQSAVE is not set
# CONFIG_INLINE_READ_UNLOCK is not set
# CONFIG_INLINE_READ_UNLOCK_BH is not set
# CONFIG_INLINE_READ_UNLOCK_IRQ is not set
# CONFIG_INLINE_READ_UNLOCK_IRQRESTORE is not set
# CONFIG_INLINE_WRITE_TRYLOCK is not set
# CONFIG_INLINE_WRITE_LOCK is not set
# CONFIG_INLINE_WRITE_LOCK_BH is not set
# CONFIG_INLINE_WRITE_LOCK_IRQ is not set
# CONFIG_INLINE_WRITE_LOCK_IRQSAVE is not set
# CONFIG_INLINE_WRITE_UNLOCK is not set
# CONFIG_INLINE_WRITE_UNLOCK_BH is not set
# CONFIG_INLINE_WRITE_UNLOCK_IRQ is not set
# CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE is not set
# CONFIG_MUTEX_SPIN_ON_OWNER is not set
CONFIG_FREEZER=y
#
# Processor type and features
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ=y
# CONFIG_BOOTPARAM_NO_HZ_OFF is not set
CONFIG_HIGH_RES_TIMERS=y
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_BOOTPARAM_HIGHRES_OFF=y
CONFIG_GENERIC_CLOCKEVENTS_MIN_ADJUST=y
CONFIG_SMP_SUPPORT=y
CONFIG_X86_MPPARSE=y
CONFIG_X86_BIGSMP=y
# CONFIG_X86_EXTENDED_PLATFORM is not set
CONFIG_X86_SUPPORTS_MEMORY_FAILURE=y
# CONFIG_X86_32_IRIS is not set
# CONFIG_SCHED_OMIT_FRAME_POINTER is not set
# CONFIG_KVMTOOL_TEST_ENABLE is not set
CONFIG_PARAVIRT_GUEST=y
CONFIG_PARAVIRT_TIME_ACCOUNTING=y
# CONFIG_XEN_PRIVILEGED_GUEST is not set
# CONFIG_KVM_CLOCK is not set
CONFIG_KVM_GUEST=y
# CONFIG_LGUEST_GUEST is not set
CONFIG_PARAVIRT=y
CONFIG_PARAVIRT_SPINLOCKS=y
CONFIG_PARAVIRT_DEBUG=y
CONFIG_NO_BOOTMEM=y
# CONFIG_MEMTEST is not set
# CONFIG_M386 is not set
# CONFIG_M486 is not set
# CONFIG_M586 is not set
# CONFIG_M586TSC is not set
# CONFIG_M586MMX is not set
CONFIG_M686=y
# CONFIG_MPENTIUMII is not set
# CONFIG_MPENTIUMIII is not set
# CONFIG_MPENTIUMM is not set
# CONFIG_MPENTIUM4 is not set
# CONFIG_MK6 is not set
# CONFIG_MK7 is not set
# CONFIG_MK8 is not set
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MELAN is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
# CONFIG_MCYRIXIII is not set
# CONFIG_MVIAC3_2 is not set
# CONFIG_MVIAC7 is not set
# CONFIG_MCORE2 is not set
# CONFIG_MATOM is not set
# CONFIG_X86_GENERIC is not set
CONFIG_X86_INTERNODE_CACHE_SHIFT=5
CONFIG_X86_CMPXCHG=y
CONFIG_CMPXCHG_LOCAL=y
CONFIG_CMPXCHG_DOUBLE=y
CONFIG_X86_L1_CACHE_SHIFT=5
CONFIG_X86_XADD=y
CONFIG_X86_PPRO_FENCE=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_X86_TSC=y
CONFIG_X86_CMPXCHG64=y
CONFIG_X86_CMOV=y
CONFIG_X86_MINIMUM_CPU_FAMILY=5
CONFIG_X86_DEBUGCTLMSR=y
CONFIG_CPU_SUP_INTEL=y
CONFIG_CPU_SUP_CYRIX_32=y
CONFIG_CPU_SUP_AMD=y
CONFIG_CPU_SUP_CENTAUR=y
CONFIG_CPU_SUP_TRANSMETA_32=y
CONFIG_CPU_SUP_UMC_32=y
# CONFIG_HPET_TIMER is not set
CONFIG_DMI=y
# CONFIG_IOMMU_HELPER is not set
CONFIG_NR_CPUS=32
CONFIG_SCHED_SMT=y
CONFIG_SCHED_MC=y
# CONFIG_IRQ_TIME_ACCOUNTING is not set
# CONFIG_PREEMPT_NONE is not set
CONFIG_PREEMPT_VOLUNTARY=y
# CONFIG_PREEMPT is not set
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS=y
CONFIG_X86_MCE=y
# CONFIG_X86_MCE_INTEL is not set
CONFIG_X86_MCE_AMD=y
# CONFIG_X86_ANCIENT_MCE is not set
CONFIG_X86_MCE_THRESHOLD=y
# CONFIG_X86_MCE_INJECT is not set
CONFIG_VM86=y
# CONFIG_I8K is not set
# CONFIG_X86_REBOOTFIXUPS is not set
# CONFIG_MICROCODE is not set
# CONFIG_X86_MSR is not set
CONFIG_X86_CPUID=m
CONFIG_UP_WANTED_1=y
CONFIG_UP_WANTED_2=y
CONFIG_UP_WANTED=y
CONFIG_SMP=y
# CONFIG_NOHIGHMEM is not set
CONFIG_HIGHMEM4G=y
# CONFIG_HIGHMEM64G is not set
CONFIG_PAGE_OFFSET=0xC0000000
CONFIG_HIGHMEM=y
# CONFIG_ARCH_PHYS_ADDR_T_64BIT is not set
# CONFIG_ARCH_DMA_ADDR_T_64BIT is not set
CONFIG_ARCH_FLATMEM_ENABLE=y
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_ILLEGAL_POINTER_VALUE=0
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_SPARSEMEM_MANUAL is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
CONFIG_SPARSEMEM_STATIC=y
CONFIG_HAVE_MEMBLOCK=y
CONFIG_PAGEFLAGS_EXTENDED=y
CONFIG_SPLIT_PTLOCK_CPUS=999999
# CONFIG_COMPACTION is not set
# CONFIG_PHYS_ADDR_T_64BIT is not set
CONFIG_ZONE_DMA_FLAG=1
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
CONFIG_MMU_NOTIFIER=y
# CONFIG_KSM is not set
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
CONFIG_ARCH_SUPPORTS_MEMORY_FAILURE=y
# CONFIG_MEMORY_FAILURE is not set
# CONFIG_TRANSPARENT_HUGEPAGE is not set
CONFIG_CLEANCACHE=y
# CONFIG_HIGHPTE is not set
CONFIG_X86_CHECK_BIOS_CORRUPTION=y
# CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK is not set
CONFIG_X86_RESERVE_LOW=64
CONFIG_MATH_EMULATION=y
CONFIG_MTRR=y
# CONFIG_MTRR_SANITIZER is not set
CONFIG_X86_PAT=y
CONFIG_ARCH_USES_PG_UNCACHED=y
CONFIG_ARCH_RANDOM=y
# CONFIG_SECCOMP is not set
CONFIG_CC_STACKPROTECTOR=y
# CONFIG_HZ_100 is not set
# CONFIG_HZ_250 is not set
CONFIG_HZ_300=y
# CONFIG_HZ_1000 is not set
CONFIG_HZ=300
CONFIG_SCHED_HRTICK=y
CONFIG_KEXEC=y
CONFIG_CRASH_DUMP=y
# CONFIG_KEXEC_JUMP is not set
CONFIG_PHYSICAL_START=0x1000000
# CONFIG_RELOCATABLE is not set
CONFIG_PHYSICAL_ALIGN=0x1000000
CONFIG_HOTPLUG_CPU=y
CONFIG_COMPAT_VDSO=y
CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE=""
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
#
# Power management and ACPI options
#
# CONFIG_SUSPEND is not set
CONFIG_HIBERNATE_CALLBACKS=y
CONFIG_HIBERNATION=y
CONFIG_PM_STD_PARTITION=""
CONFIG_PM_SLEEP=y
CONFIG_PM_SLEEP_SMP=y
# CONFIG_PM_RUNTIME is not set
CONFIG_PM=y
# CONFIG_PM_DEBUG is not set
# CONFIG_ACPI is not set
CONFIG_SFI=y
#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=m
CONFIG_CPU_FREQ_STAT=m
CONFIG_CPU_FREQ_STAT_DETAILS=y
CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=m
CONFIG_CPU_FREQ_GOV_USERSPACE=m
CONFIG_CPU_FREQ_GOV_ONDEMAND=m
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=m
#
# x86 CPU frequency scaling drivers
#
CONFIG_X86_POWERNOW_K6=m
# CONFIG_X86_POWERNOW_K7 is not set
# CONFIG_X86_GX_SUSPMOD is not set
# CONFIG_X86_SPEEDSTEP_CENTRINO is not set
# CONFIG_X86_SPEEDSTEP_ICH is not set
CONFIG_X86_SPEEDSTEP_SMI=m
# CONFIG_X86_P4_CLOCKMOD is not set
# CONFIG_X86_CPUFREQ_NFORCE2 is not set
# CONFIG_X86_LONGRUN is not set
CONFIG_X86_E_POWERSAVER=m
#
# shared options
#
CONFIG_X86_SPEEDSTEP_LIB=m
CONFIG_X86_SPEEDSTEP_RELAXED_CAP_CHECK=y
# CONFIG_CPU_IDLE is not set
#
# Bus options (PCI etc.)
#
CONFIG_PCI=y
# CONFIG_PCI_GOBIOS is not set
# CONFIG_PCI_GOMMCONFIG is not set
# CONFIG_PCI_GODIRECT is not set
CONFIG_PCI_GOANY=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_MMCONFIG=y
CONFIG_PCI_DOMAINS=y
# CONFIG_PCI_CNB20LE_QUIRK is not set
# CONFIG_PCIEPORTBUS is not set
CONFIG_ARCH_SUPPORTS_MSI=y
# CONFIG_PCI_MSI is not set
CONFIG_PCI_DEBUG=y
# CONFIG_PCI_STUB is not set
# CONFIG_HT_IRQ is not set
CONFIG_PCI_ATS=y
CONFIG_PCI_IOV=y
CONFIG_PCI_PRI=y
# CONFIG_PCI_PASID is not set
CONFIG_PCI_LABEL=y
CONFIG_ISA_DMA_API=y
# CONFIG_ISA is not set
CONFIG_MCA=y
# CONFIG_MCA_LEGACY is not set
CONFIG_SCx200=m
# CONFIG_SCx200HR_TIMER is not set
# CONFIG_OLPC is not set
# CONFIG_ALIX is not set
CONFIG_AMD_NB=y
# CONFIG_PCCARD is not set
# CONFIG_HOTPLUG_PCI is not set
# CONFIG_RAPIDIO is not set
# CONFIG_BOOTPARAM_NMI_WATCHDOG_BIT_0 is not set
# CONFIG_BOOTPARAM_NOAPIC is not set
# CONFIG_BOOTPARAM_NOLAPIC_TIMER is not set
# CONFIG_BOOTPARAM_LAPIC is not set
# CONFIG_BOOTPARAM_HPET_DISABLE is not set
# CONFIG_BOOTPARAM_IDLE_POLL is not set
CONFIG_BOOTPARAM_HIGHMEM_512M=y
# CONFIG_BOOTPARAM_NOPAT is not set
# CONFIG_BOOTPARAM_NOTSC is not set
# CONFIG_BOOTPARAM_ACPI_OFF is not set
CONFIG_BOOTPARAM_PCI_NOMSI=y
#
# Executable file formats / Emulations
#
CONFIG_BINFMT_ELF=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_HAVE_AOUT=y
CONFIG_BINFMT_AOUT=m
CONFIG_BINFMT_MISC=m
CONFIG_HAVE_ATOMIC_IOMAP=y
CONFIG_HAVE_TEXT_POKE_SMP=y
CONFIG_NET=y
#
# Networking options
#
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_XFRM=y
# CONFIG_XFRM_USER is not set
CONFIG_XFRM_SUB_POLICY=y
CONFIG_XFRM_MIGRATE=y
# CONFIG_XFRM_STATISTICS is not set
# CONFIG_NET_KEY is not set
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
# CONFIG_IP_ADVANCED_ROUTER is not set
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_IP_PNP_RARP=y
CONFIG_NET_IPIP=m
CONFIG_NET_IPGRE_DEMUX=m
CONFIG_NET_IPGRE=m
CONFIG_ARPD=y
# CONFIG_SYN_COOKIES is not set
CONFIG_INET_AH=m
CONFIG_INET_ESP=m
# CONFIG_INET_IPCOMP is not set
# CONFIG_INET_XFRM_TUNNEL is not set
CONFIG_INET_TUNNEL=m
# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
CONFIG_INET_XFRM_MODE_TUNNEL=m
# CONFIG_INET_XFRM_MODE_BEET is not set
CONFIG_INET_LRO=m
CONFIG_INET_DIAG=m
CONFIG_INET_TCP_DIAG=m
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
# CONFIG_IPV6 is not set
# CONFIG_NETLABEL is not set
# CONFIG_NETWORK_SECMARK is not set
# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
CONFIG_NETFILTER=y
# CONFIG_NETFILTER_DEBUG is not set
# CONFIG_NETFILTER_ADVANCED is not set
#
# Core Netfilter Configuration
#
CONFIG_NETFILTER_NETLINK=m
# CONFIG_NETFILTER_NETLINK_LOG is not set
CONFIG_NF_CONNTRACK=m
CONFIG_NF_CONNTRACK_FTP=m
# CONFIG_NF_CONNTRACK_IRC is not set
# CONFIG_NF_CONNTRACK_NETBIOS_NS is not set
# CONFIG_NF_CONNTRACK_SIP is not set
CONFIG_NF_CT_NETLINK=m
CONFIG_NETFILTER_XTABLES=m
#
# Xtables combined modules
#
# CONFIG_NETFILTER_XT_MARK is not set
#
# Xtables targets
#
# CONFIG_NETFILTER_XT_TARGET_NFLOG is not set
CONFIG_NETFILTER_XT_TARGET_TCPMSS=m
#
# Xtables matches
#
# CONFIG_NETFILTER_XT_MATCH_CONNTRACK is not set
# CONFIG_NETFILTER_XT_MATCH_POLICY is not set
CONFIG_NETFILTER_XT_MATCH_STATE=m
CONFIG_IP_SET=m
CONFIG_IP_SET_MAX=256
# CONFIG_IP_SET_BITMAP_IP is not set
# CONFIG_IP_SET_BITMAP_IPMAC is not set
CONFIG_IP_SET_BITMAP_PORT=m
# CONFIG_IP_SET_HASH_IP is not set
# CONFIG_IP_SET_HASH_IPPORT is not set
# CONFIG_IP_SET_HASH_IPPORTIP is not set
CONFIG_IP_SET_HASH_IPPORTNET=m
CONFIG_IP_SET_HASH_NET=m
CONFIG_IP_SET_HASH_NETPORT=m
CONFIG_IP_SET_HASH_NETIFACE=m
CONFIG_IP_SET_LIST_SET=m
CONFIG_IP_VS=m
# CONFIG_IP_VS_DEBUG is not set
CONFIG_IP_VS_TAB_BITS=12
#
# IPVS transport protocol load balancing support
#
CONFIG_IP_VS_PROTO_TCP=y
CONFIG_IP_VS_PROTO_UDP=y
# CONFIG_IP_VS_PROTO_AH_ESP is not set
# CONFIG_IP_VS_PROTO_ESP is not set
# CONFIG_IP_VS_PROTO_AH is not set
CONFIG_IP_VS_PROTO_SCTP=y
#
# IPVS scheduler
#
CONFIG_IP_VS_RR=m
# CONFIG_IP_VS_WRR is not set
# CONFIG_IP_VS_LC is not set
# CONFIG_IP_VS_WLC is not set
CONFIG_IP_VS_LBLC=m
CONFIG_IP_VS_LBLCR=m
# CONFIG_IP_VS_DH is not set
# CONFIG_IP_VS_SH is not set
# CONFIG_IP_VS_SED is not set
CONFIG_IP_VS_NQ=m
#
# IPVS application helper
#
CONFIG_IP_VS_NFCT=y
#
# IP: Netfilter Configuration
#
CONFIG_NF_DEFRAG_IPV4=m
CONFIG_NF_CONNTRACK_IPV4=m
CONFIG_NF_CONNTRACK_PROC_COMPAT=y
# CONFIG_IP_NF_IPTABLES is not set
CONFIG_BRIDGE_NF_EBTABLES=m
CONFIG_BRIDGE_EBT_BROUTE=m
# CONFIG_BRIDGE_EBT_T_FILTER is not set
CONFIG_BRIDGE_EBT_T_NAT=m
# CONFIG_BRIDGE_EBT_802_3 is not set
# CONFIG_BRIDGE_EBT_AMONG is not set
# CONFIG_BRIDGE_EBT_ARP is not set
CONFIG_BRIDGE_EBT_IP=m
# CONFIG_BRIDGE_EBT_LIMIT is not set
# CONFIG_BRIDGE_EBT_MARK is not set
CONFIG_BRIDGE_EBT_PKTTYPE=m
CONFIG_BRIDGE_EBT_STP=m
CONFIG_BRIDGE_EBT_VLAN=m
CONFIG_BRIDGE_EBT_ARPREPLY=m
CONFIG_BRIDGE_EBT_DNAT=m
CONFIG_BRIDGE_EBT_MARK_T=m
CONFIG_BRIDGE_EBT_REDIRECT=m
# CONFIG_BRIDGE_EBT_SNAT is not set
# CONFIG_BRIDGE_EBT_LOG is not set
# CONFIG_BRIDGE_EBT_ULOG is not set
CONFIG_BRIDGE_EBT_NFLOG=m
# CONFIG_IP_DCCP is not set
CONFIG_IP_SCTP=m
CONFIG_SCTP_DBG_MSG=y
# CONFIG_SCTP_DBG_OBJCNT is not set
# CONFIG_SCTP_HMAC_NONE is not set
CONFIG_SCTP_HMAC_SHA1=y
# CONFIG_SCTP_HMAC_MD5 is not set
CONFIG_RDS=m
CONFIG_RDS_RDMA=m
# CONFIG_RDS_TCP is not set
# CONFIG_RDS_DEBUG is not set
CONFIG_TIPC=m
# CONFIG_TIPC_ADVANCED is not set
# CONFIG_TIPC_DEBUG is not set
CONFIG_ATM=m
# CONFIG_ATM_CLIP is not set
# CONFIG_ATM_LANE is not set
CONFIG_ATM_BR2684=m
# CONFIG_ATM_BR2684_IPFILTER is not set
# CONFIG_L2TP is not set
CONFIG_STP=m
CONFIG_BRIDGE=m
CONFIG_BRIDGE_IGMP_SNOOPING=y
# CONFIG_NET_DSA is not set
# CONFIG_VLAN_8021Q is not set
# CONFIG_DECNET is not set
CONFIG_LLC=y
CONFIG_LLC2=m
CONFIG_IPX=m
CONFIG_IPX_INTERN=y
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
CONFIG_LAPB=m
# CONFIG_ECONET is not set
CONFIG_WAN_ROUTER=m
CONFIG_PHONET=m
CONFIG_IEEE802154=m
CONFIG_NET_SCHED=y
#
# Queueing/Scheduling
#
# CONFIG_NET_SCH_CBQ is not set
# CONFIG_NET_SCH_HTB is not set
# CONFIG_NET_SCH_HFSC is not set
# CONFIG_NET_SCH_ATM is not set
CONFIG_NET_SCH_PRIO=m
CONFIG_NET_SCH_MULTIQ=m
CONFIG_NET_SCH_RED=m
CONFIG_NET_SCH_SFB=m
# CONFIG_NET_SCH_SFQ is not set
CONFIG_NET_SCH_TEQL=m
# CONFIG_NET_SCH_TBF is not set
# CONFIG_NET_SCH_GRED is not set
# CONFIG_NET_SCH_DSMARK is not set
# CONFIG_NET_SCH_NETEM is not set
# CONFIG_NET_SCH_DRR is not set
CONFIG_NET_SCH_MQPRIO=m
CONFIG_NET_SCH_CHOKE=m
# CONFIG_NET_SCH_QFQ is not set
CONFIG_NET_SCH_INGRESS=m
#
# Classification
#
CONFIG_NET_CLS=y
CONFIG_NET_CLS_BASIC=m
CONFIG_NET_CLS_TCINDEX=m
# CONFIG_NET_CLS_ROUTE4 is not set
# CONFIG_NET_CLS_FW is not set
CONFIG_NET_CLS_U32=m
# CONFIG_CLS_U32_PERF is not set
CONFIG_CLS_U32_MARK=y
CONFIG_NET_CLS_RSVP=m
CONFIG_NET_CLS_RSVP6=m
# CONFIG_NET_CLS_FLOW is not set
CONFIG_NET_CLS_CGROUP=m
# CONFIG_NET_EMATCH is not set
CONFIG_NET_CLS_ACT=y
# CONFIG_NET_ACT_POLICE is not set
CONFIG_NET_ACT_GACT=m
CONFIG_GACT_PROB=y
# CONFIG_NET_ACT_MIRRED is not set
# CONFIG_NET_ACT_NAT is not set
CONFIG_NET_ACT_PEDIT=m
CONFIG_NET_ACT_SIMP=m
# CONFIG_NET_ACT_SKBEDIT is not set
# CONFIG_NET_ACT_CSUM is not set
# CONFIG_NET_CLS_IND is not set
CONFIG_NET_SCH_FIFO=y
CONFIG_DCB=y
# CONFIG_DNS_RESOLVER is not set
# CONFIG_BATMAN_ADV is not set
CONFIG_RPS=y
CONFIG_RFS_ACCEL=y
CONFIG_XPS=y
#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_NET_DROP_MONITOR is not set
# CONFIG_HAMRADIO is not set
CONFIG_CAN=m
# CONFIG_CAN_RAW is not set
# CONFIG_CAN_BCM is not set
# CONFIG_CAN_GW is not set
#
# CAN Device Drivers
#
# CONFIG_CAN_VCAN is not set
CONFIG_CAN_SLCAN=m
# CONFIG_CAN_DEV is not set
CONFIG_CAN_DEBUG_DEVICES=y
# CONFIG_IRDA is not set
# CONFIG_BT is not set
CONFIG_AF_RXRPC=m
CONFIG_AF_RXRPC_DEBUG=y
CONFIG_RXKAD=m
CONFIG_WIRELESS=y
CONFIG_WIRELESS_EXT=y
CONFIG_WEXT_CORE=y
CONFIG_WEXT_PROC=y
CONFIG_WEXT_SPY=y
CONFIG_WEXT_PRIV=y
# CONFIG_CFG80211 is not set
CONFIG_WIRELESS_EXT_SYSFS=y
# CONFIG_LIB80211 is not set
#
# CFG80211 needs to be enabled for MAC80211
#
CONFIG_WIMAX=m
CONFIG_WIMAX_DEBUG_LEVEL=8
# CONFIG_RFKILL is not set
CONFIG_NET_9P=m
# CONFIG_NET_9P_VIRTIO is not set
CONFIG_NET_9P_RDMA=m
# CONFIG_NET_9P_DEBUG is not set
CONFIG_CAIF=m
# CONFIG_CAIF_DEBUG is not set
# CONFIG_CAIF_NETDEV is not set
CONFIG_CEPH_LIB=m
CONFIG_CEPH_LIB_PRETTYDEBUG=y
# CONFIG_CEPH_LIB_USE_DNS_RESOLVER is not set
# CONFIG_NFC is not set
#
# Device Drivers
#
#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH=""
CONFIG_DEVTMPFS=y
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
# CONFIG_FIRMWARE_IN_KERNEL is not set
CONFIG_EXTRA_FIRMWARE=""
CONFIG_DEBUG_DRIVER=y
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_SYS_HYPERVISOR is not set
# CONFIG_CONNECTOR is not set
# CONFIG_PARPORT is not set
CONFIG_BLK_DEV=y
CONFIG_BLK_DEV_FD=m
CONFIG_BLK_CPQ_DA=y
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_BLK_DEV_DAC960 is not set
CONFIG_BLK_DEV_UMEM=m
# CONFIG_BLK_DEV_COW_COMMON is not set
# CONFIG_BLK_DEV_LOOP is not set
#
# DRBD disabled because PROC_FS, INET or CONNECTOR not selected
#
CONFIG_BLK_DEV_NBD=m
CONFIG_BLK_DEV_SX8=m
# CONFIG_BLK_DEV_UB is not set
CONFIG_BLK_DEV_RAM=m
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=4096
CONFIG_BLK_DEV_XIP=y
# CONFIG_CDROM_PKTCDVD is not set
CONFIG_ATA_OVER_ETH=m
# CONFIG_VIRTIO_BLK is not set
CONFIG_BLK_DEV_HD=y
CONFIG_BLK_DEV_RBD=m
# CONFIG_SENSORS_LIS3LV02D is not set
CONFIG_MISC_DEVICES=y
# CONFIG_AD525X_DPOT is not set
# CONFIG_IBM_ASM is not set
CONFIG_PHANTOM=m
CONFIG_INTEL_MID_PTI=m
CONFIG_SGI_IOC4=m
# CONFIG_TIFM_CORE is not set
CONFIG_ENCLOSURE_SERVICES=m
CONFIG_CS5535_MFGPT=m
CONFIG_CS5535_MFGPT_DEFAULT_IRQ=7
# CONFIG_CS5535_CLOCK_EVENT_SRC is not set
CONFIG_HP_ILO=m
CONFIG_TI_DAC7512=m
# CONFIG_VMWARE_BALLOON is not set
CONFIG_PCH_PHUB=m
CONFIG_C2PORT=m
CONFIG_C2PORT_DURAMAR_2150=m
#
# EEPROM support
#
# CONFIG_EEPROM_AT25 is not set
CONFIG_EEPROM_93CX6=m
CONFIG_EEPROM_93XX46=m
CONFIG_CB710_CORE=m
CONFIG_CB710_DEBUG=y
CONFIG_CB710_DEBUG_ASSUMPTIONS=y
CONFIG_IWMC3200TOP=m
# CONFIG_IWMC3200TOP_DEBUG is not set
# CONFIG_IWMC3200TOP_DEBUGFS is not set
#
# Texas Instruments shared transport line discipline
#
CONFIG_TI_ST=m
# CONFIG_SENSORS_LIS3_SPI is not set
#
# Altera FPGA firmware download module
#
CONFIG_HAVE_IDE=y
#
# SCSI device support
#
CONFIG_SCSI_MOD=y
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
# CONFIG_SCSI_TGT is not set
CONFIG_SCSI_NETLINK=y
CONFIG_SCSI_PROC_FS=y
#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
CONFIG_CHR_DEV_ST=m
# CONFIG_CHR_DEV_OSST is not set
# CONFIG_BLK_DEV_SR is not set
CONFIG_CHR_DEV_SG=m
CONFIG_CHR_DEV_SCH=m
CONFIG_SCSI_ENCLOSURE=m
CONFIG_SCSI_MULTI_LUN=y
# CONFIG_SCSI_CONSTANTS is not set
CONFIG_SCSI_LOGGING=y
# CONFIG_SCSI_SCAN_ASYNC is not set
CONFIG_SCSI_WAIT_SCAN=m
#
# SCSI Transports
#
CONFIG_SCSI_SPI_ATTRS=y
CONFIG_SCSI_FC_ATTRS=m
CONFIG_SCSI_ISCSI_ATTRS=m
CONFIG_SCSI_SAS_ATTRS=m
CONFIG_SCSI_SAS_LIBSAS=m
CONFIG_SCSI_SAS_ATA=y
CONFIG_SCSI_SAS_HOST_SMP=y
CONFIG_SCSI_SRP_ATTRS=m
# CONFIG_SCSI_LOWLEVEL is not set
CONFIG_SCSI_AIC7XXX=y
# CONFIG_SCSI_DH is not set
CONFIG_SCSI_OSD_INITIATOR=m
# CONFIG_SCSI_OSD_ULD is not set
CONFIG_SCSI_OSD_DPRINT_SENSE=1
# CONFIG_SCSI_OSD_DEBUG is not set
CONFIG_ATA=y
# CONFIG_ATA_NONSTANDARD is not set
CONFIG_ATA_VERBOSE_ERROR=y
CONFIG_SATA_PMP=y
#
# Controllers with non-SFF native interface
#
CONFIG_SATA_AHCI=y
# CONFIG_SATA_AHCI_PLATFORM is not set
CONFIG_SATA_INIC162X=m
CONFIG_SATA_ACARD_AHCI=m
CONFIG_SATA_SIL24=m
CONFIG_ATA_SFF=y
#
# SFF controllers with custom DMA interface
#
# CONFIG_PDC_ADMA is not set
# CONFIG_SATA_QSTOR is not set
# CONFIG_SATA_SX4 is not set
CONFIG_ATA_BMDMA=y
#
# SATA SFF controllers with BMDMA
#
CONFIG_ATA_PIIX=y
CONFIG_SATA_MV=m
CONFIG_SATA_NV=y
# CONFIG_SATA_PROMISE is not set
CONFIG_SATA_SIL=m
CONFIG_SATA_SIS=m
CONFIG_SATA_SVW=m
# CONFIG_SATA_ULI is not set
# CONFIG_SATA_VIA is not set
# CONFIG_SATA_VITESSE is not set
#
# PATA SFF controllers with BMDMA
#
# CONFIG_PATA_ALI is not set
CONFIG_PATA_AMD=y
# CONFIG_PATA_ARASAN_CF is not set
CONFIG_PATA_ARTOP=m
CONFIG_PATA_ATIIXP=m
CONFIG_PATA_ATP867X=m
CONFIG_PATA_CMD64X=m
CONFIG_PATA_CS5520=m
CONFIG_PATA_CS5530=m
CONFIG_PATA_CS5535=m
# CONFIG_PATA_CS5536 is not set
# CONFIG_PATA_CYPRESS is not set
CONFIG_PATA_EFAR=m
CONFIG_PATA_HPT366=m
CONFIG_PATA_HPT37X=m
# CONFIG_PATA_HPT3X2N is not set
# CONFIG_PATA_HPT3X3 is not set
# CONFIG_PATA_IT8213 is not set
CONFIG_PATA_IT821X=m
CONFIG_PATA_JMICRON=m
# CONFIG_PATA_MARVELL is not set
CONFIG_PATA_NETCELL=m
# CONFIG_PATA_NINJA32 is not set
CONFIG_PATA_NS87415=m
CONFIG_PATA_OLDPIIX=y
# CONFIG_PATA_OPTIDMA is not set
# CONFIG_PATA_PDC2027X is not set
CONFIG_PATA_PDC_OLD=m
# CONFIG_PATA_RADISYS is not set
# CONFIG_PATA_RDC is not set
CONFIG_PATA_SC1200=m
CONFIG_PATA_SCH=m
# CONFIG_PATA_SERVERWORKS is not set
# CONFIG_PATA_SIL680 is not set
CONFIG_PATA_SIS=m
CONFIG_PATA_TOSHIBA=m
CONFIG_PATA_TRIFLEX=m
CONFIG_PATA_VIA=y
CONFIG_PATA_WINBOND=m
#
# PIO-only SFF controllers
#
CONFIG_PATA_CMD640_PCI=m
# CONFIG_PATA_MPIIX is not set
# CONFIG_PATA_NS87410 is not set
# CONFIG_PATA_OPTI is not set
# CONFIG_PATA_RZ1000 is not set
#
# Generic fallback / legacy drivers
#
# CONFIG_ATA_GENERIC is not set
CONFIG_PATA_LEGACY=m
CONFIG_MD=y
CONFIG_BLK_DEV_MD=m
# CONFIG_MD_LINEAR is not set
CONFIG_MD_RAID0=m
CONFIG_MD_RAID1=m
# CONFIG_MD_RAID10 is not set
# CONFIG_MD_RAID456 is not set
CONFIG_MD_MULTIPATH=m
CONFIG_MD_FAULTY=m
# CONFIG_BLK_DEV_DM is not set
CONFIG_TARGET_CORE=m
CONFIG_TCM_IBLOCK=m
# CONFIG_TCM_FILEIO is not set
CONFIG_TCM_PSCSI=m
CONFIG_LOOPBACK_TARGET=m
# CONFIG_ISCSI_TARGET is not set
CONFIG_FUSION=y
# CONFIG_FUSION_SPI is not set
CONFIG_FUSION_FC=m
CONFIG_FUSION_SAS=m
CONFIG_FUSION_MAX_SGE=128
CONFIG_FUSION_CTL=m
CONFIG_FUSION_LAN=m
# CONFIG_FUSION_LOGGING is not set
#
# IEEE 1394 (FireWire) support
#
CONFIG_FIREWIRE=m
CONFIG_FIREWIRE_OHCI=m
CONFIG_FIREWIRE_OHCI_DEBUG=y
# CONFIG_FIREWIRE_SBP2 is not set
CONFIG_FIREWIRE_NET=m
CONFIG_FIREWIRE_NOSY=m
# CONFIG_I2O is not set
# CONFIG_MACINTOSH_DRIVERS is not set
CONFIG_NETDEVICES=y
CONFIG_NET_CORE=y
# CONFIG_BONDING is not set
# CONFIG_DUMMY is not set
# CONFIG_EQUALIZER is not set
CONFIG_NET_FC=y
CONFIG_MII=y
# CONFIG_IEEE802154_DRIVERS is not set
# CONFIG_IFB is not set
CONFIG_MACVLAN=m
# CONFIG_MACVTAP is not set
CONFIG_NETCONSOLE=y
CONFIG_NETPOLL=y
# CONFIG_NETPOLL_TRAP is not set
CONFIG_NET_POLL_CONTROLLER=y
# CONFIG_TUN is not set
CONFIG_VETH=m
CONFIG_VIRTIO_NET=m
CONFIG_ARCNET=m
# CONFIG_ARCNET_1201 is not set
CONFIG_ARCNET_1051=m
# CONFIG_ARCNET_RAW is not set
CONFIG_ARCNET_CAP=m
CONFIG_ARCNET_COM90xx=m
# CONFIG_ARCNET_COM90xxIO is not set
# CONFIG_ARCNET_RIM_I is not set
# CONFIG_ARCNET_COM20020 is not set
# CONFIG_ATM_DRIVERS is not set
#
# CAIF transport drivers
#
# CONFIG_CAIF_TTY is not set
# CONFIG_CAIF_SPI_SLAVE is not set
CONFIG_CAIF_HSI=m
CONFIG_ETHERNET=y
CONFIG_MDIO=m
# CONFIG_NET_VENDOR_3COM is not set
CONFIG_VORTEX=y
# CONFIG_NET_VENDOR_ADAPTEC is not set
CONFIG_NET_VENDOR_ALTEON=y
CONFIG_ACENIC=m
# CONFIG_ACENIC_OMIT_TIGON_I is not set
# CONFIG_NET_VENDOR_AMD is not set
CONFIG_NET_VENDOR_ATHEROS=y
# CONFIG_ATL2 is not set
CONFIG_ATL1=m
# CONFIG_ATL1E is not set
CONFIG_ATL1C=m
CONFIG_NET_VENDOR_BROADCOM=y
# CONFIG_B44 is not set
CONFIG_BNX2=m
# CONFIG_CNIC is not set
CONFIG_TIGON3=y
# CONFIG_BNX2X is not set
# CONFIG_NET_VENDOR_BROCADE is not set
CONFIG_NET_VENDOR_CHELSIO=y
CONFIG_CHELSIO_T1=m
CONFIG_CHELSIO_T1_1G=y
# CONFIG_CHELSIO_T3 is not set
CONFIG_CHELSIO_T4=m
# CONFIG_CHELSIO_T4VF is not set
# CONFIG_NET_VENDOR_CISCO is not set
CONFIG_DNET=m
# CONFIG_NET_VENDOR_DEC is not set
# CONFIG_NET_VENDOR_DLINK is not set
# CONFIG_NET_VENDOR_EMULEX is not set
CONFIG_NET_VENDOR_EXAR=y
CONFIG_S2IO=m
CONFIG_VXGE=m
# CONFIG_VXGE_DEBUG_TRACE_ALL is not set
CONFIG_NET_VENDOR_HP=y
CONFIG_HP100=m
CONFIG_NET_VENDOR_IBM=y
# CONFIG_IBM_EMAC_ZMII is not set
# CONFIG_IBM_EMAC_RGMII is not set
# CONFIG_IBM_EMAC_TAH is not set
# CONFIG_IBM_EMAC_EMAC4 is not set
# CONFIG_IBM_EMAC_NO_FLOW_CTRL is not set
# CONFIG_IBM_EMAC_MAL_CLR_ICINTSTAT is not set
# CONFIG_IBM_EMAC_MAL_COMMON_ERR is not set
# CONFIG_NET_VENDOR_INTEL is not set
CONFIG_E100=y
CONFIG_E1000E=y
CONFIG_IP1000=m
CONFIG_JME=m
CONFIG_NET_VENDOR_MARVELL=y
CONFIG_SKGE=y
CONFIG_SKGE_DEBUG=y
# CONFIG_SKGE_GENESIS is not set
# CONFIG_SKY2 is not set
CONFIG_NET_VENDOR_MELLANOX=y
CONFIG_MLX4_EN=m
CONFIG_MLX4_CORE=m
CONFIG_MLX4_DEBUG=y
CONFIG_NET_VENDOR_MICREL=y
CONFIG_KS8842=m
# CONFIG_KS8851 is not set
CONFIG_KS8851_MLL=m
# CONFIG_KSZ884X_PCI is not set
CONFIG_NET_VENDOR_MICROCHIP=y
CONFIG_ENC28J60=m
# CONFIG_ENC28J60_WRITEVERIFY is not set
CONFIG_NET_VENDOR_MYRI=y
CONFIG_MYRI10GE=m
CONFIG_MYRI10GE_DCA=y
CONFIG_FEALNX=m
CONFIG_NET_VENDOR_NATSEMI=y
# CONFIG_IBMLANA is not set
CONFIG_NATSEMI=m
# CONFIG_NS83820 is not set
# CONFIG_NET_VENDOR_8390 is not set
CONFIG_NET_VENDOR_NVIDIA=y
CONFIG_FORCEDETH=y
# CONFIG_NET_VENDOR_OKI is not set
CONFIG_ETHOC=m
CONFIG_NET_PACKET_ENGINE=y
CONFIG_HAMACHI=m
CONFIG_YELLOWFIN=m
# CONFIG_NET_VENDOR_QLOGIC is not set
# CONFIG_NET_VENDOR_REALTEK is not set
CONFIG_8139TOO=y
CONFIG_NET_VENDOR_RDC=y
CONFIG_R6040=m
# CONFIG_NET_VENDOR_SEEQ is not set
CONFIG_NET_VENDOR_SILAN=y
# CONFIG_SC92031 is not set
# CONFIG_NET_VENDOR_SIS is not set
# CONFIG_SFC is not set
# CONFIG_NET_VENDOR_SMSC is not set
# CONFIG_NET_VENDOR_STMICRO is not set
# CONFIG_NET_VENDOR_SUN is not set
# CONFIG_NET_VENDOR_TEHUTI is not set
CONFIG_NET_VENDOR_TI=y
# CONFIG_TLAN is not set
CONFIG_NET_VENDOR_VIA=y
CONFIG_VIA_RHINE=m
CONFIG_VIA_RHINE_MMIO=y
CONFIG_VIA_VELOCITY=m
# CONFIG_FDDI is not set
CONFIG_HIPPI=y
CONFIG_ROADRUNNER=m
# CONFIG_ROADRUNNER_LARGE_RINGS is not set
CONFIG_PHYLIB=y
#
# MII PHY device drivers
#
CONFIG_MARVELL_PHY=m
# CONFIG_DAVICOM_PHY is not set
CONFIG_QSEMI_PHY=m
# CONFIG_LXT_PHY is not set
# CONFIG_CICADA_PHY is not set
# CONFIG_VITESSE_PHY is not set
CONFIG_SMSC_PHY=m
# CONFIG_BROADCOM_PHY is not set
CONFIG_ICPLUS_PHY=m
CONFIG_REALTEK_PHY=m
CONFIG_NATIONAL_PHY=m
CONFIG_STE10XP=m
# CONFIG_LSI_ET1011C_PHY is not set
CONFIG_MICREL_PHY=m
CONFIG_FIXED_PHY=y
# CONFIG_MDIO_BITBANG is not set
CONFIG_PPP=m
CONFIG_PPP_BSDCOMP=m
CONFIG_PPP_DEFLATE=m
# CONFIG_PPP_FILTER is not set
CONFIG_PPP_MPPE=m
CONFIG_PPP_MULTILINK=y
# CONFIG_PPPOATM is not set
# CONFIG_PPPOE is not set
CONFIG_PPTP=m
# CONFIG_PPP_ASYNC is not set
# CONFIG_PPP_SYNC_TTY is not set
# CONFIG_SLIP is not set
CONFIG_SLHC=m
CONFIG_TR=y
CONFIG_IBMTR=m
CONFIG_IBMOL=m
# CONFIG_IBMLS is not set
# CONFIG_3C359 is not set
# CONFIG_TMS380TR is not set
#
# USB Network Adapters
#
CONFIG_USB_CATC=m
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
CONFIG_USB_RTL8150=m
# CONFIG_USB_USBNET is not set
CONFIG_USB_CDC_PHONET=m
CONFIG_USB_IPHETH=m
CONFIG_WLAN=y
CONFIG_AIRO=m
# CONFIG_ATMEL is not set
# CONFIG_PRISM54 is not set
# CONFIG_USB_ZD1201 is not set
# CONFIG_HOSTAP is not set
#
# WiMAX Wireless Broadband devices
#
# CONFIG_WIMAX_I2400M_SDIO is not set
CONFIG_WAN=y
CONFIG_LANMEDIA=m
CONFIG_HDLC=m
# CONFIG_HDLC_RAW is not set
# CONFIG_HDLC_RAW_ETH is not set
CONFIG_HDLC_CISCO=m
# CONFIG_HDLC_FR is not set
CONFIG_HDLC_PPP=m
# CONFIG_HDLC_X25 is not set
# CONFIG_PCI200SYN is not set
CONFIG_WANXL=m
CONFIG_PC300TOO=m
# CONFIG_FARSYNC is not set
CONFIG_DSCC4=m
CONFIG_DSCC4_PCISYNC=y
# CONFIG_DSCC4_PCI_RST is not set
# CONFIG_DLCI is not set
# CONFIG_WAN_ROUTER_DRIVERS is not set
CONFIG_SBNI=m
CONFIG_SBNI_MULTILINE=y
# CONFIG_VMXNET3 is not set
CONFIG_ISDN=y
CONFIG_ISDN_I4L=m
CONFIG_ISDN_PPP=y
# CONFIG_ISDN_PPP_VJ is not set
CONFIG_ISDN_MPP=y
CONFIG_IPPP_FILTER=y
# CONFIG_ISDN_PPP_BSDCOMP is not set
CONFIG_ISDN_AUDIO=y
# CONFIG_ISDN_TTY_FAX is not set
#
# ISDN feature submodules
#
# CONFIG_ISDN_DIVERSION is not set
#
# ISDN4Linux hardware drivers
#
#
# Passive cards
#
# CONFIG_ISDN_DRV_HISAX is not set
#
# Active cards
#
CONFIG_ISDN_CAPI=m
CONFIG_ISDN_DRV_AVMB1_VERBOSE_REASON=y
# CONFIG_CAPI_TRACE is not set
# CONFIG_ISDN_CAPI_MIDDLEWARE is not set
CONFIG_ISDN_CAPI_CAPI20=m
# CONFIG_ISDN_CAPI_CAPIDRV is not set
#
# CAPI hardware drivers
#
# CONFIG_CAPI_AVM is not set
CONFIG_CAPI_EICON=y
# CONFIG_ISDN_DIVAS is not set
CONFIG_ISDN_DRV_GIGASET=m
# CONFIG_GIGASET_CAPI is not set
CONFIG_GIGASET_I4L=y
# CONFIG_GIGASET_DUMMYLL is not set
# CONFIG_GIGASET_BASE is not set
CONFIG_GIGASET_M105=m
# CONFIG_GIGASET_M101 is not set
# CONFIG_GIGASET_DEBUG is not set
# CONFIG_HYSDN is not set
# CONFIG_PHONE is not set
#
# Input device support
#
CONFIG_INPUT=y
CONFIG_INPUT_FF_MEMLESS=m
CONFIG_INPUT_POLLDEV=y
CONFIG_INPUT_SPARSEKMAP=m
#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
CONFIG_INPUT_MOUSEDEV_PSAUX=y
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
# CONFIG_INPUT_JOYDEV is not set
# CONFIG_INPUT_EVDEV is not set
CONFIG_INPUT_EVBUG=m
#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
CONFIG_KEYBOARD_ATKBD=y
# CONFIG_KEYBOARD_LKKBD is not set
CONFIG_KEYBOARD_GPIO=m
CONFIG_KEYBOARD_GPIO_POLLED=m
# CONFIG_KEYBOARD_MATRIX is not set
CONFIG_KEYBOARD_NEWTON=m
# CONFIG_KEYBOARD_OPENCORES is not set
CONFIG_KEYBOARD_STOWAWAY=m
# CONFIG_KEYBOARD_SUNKBD is not set
CONFIG_KEYBOARD_XTKBD=m
CONFIG_INPUT_MOUSE=y
# CONFIG_MOUSE_PS2 is not set
CONFIG_MOUSE_SERIAL=m
CONFIG_MOUSE_APPLETOUCH=m
CONFIG_MOUSE_BCM5974=m
# CONFIG_MOUSE_VSXXXAA is not set
# CONFIG_MOUSE_GPIO is not set
CONFIG_INPUT_JOYSTICK=y
# CONFIG_JOYSTICK_ANALOG is not set
CONFIG_JOYSTICK_A3D=m
CONFIG_JOYSTICK_ADI=m
# CONFIG_JOYSTICK_COBRA is not set
# CONFIG_JOYSTICK_GF2K is not set
# CONFIG_JOYSTICK_GRIP is not set
# CONFIG_JOYSTICK_GRIP_MP is not set
# CONFIG_JOYSTICK_GUILLEMOT is not set
CONFIG_JOYSTICK_INTERACT=m
# CONFIG_JOYSTICK_SIDEWINDER is not set
# CONFIG_JOYSTICK_TMDC is not set
CONFIG_JOYSTICK_IFORCE=m
# CONFIG_JOYSTICK_IFORCE_USB is not set
CONFIG_JOYSTICK_IFORCE_232=y
CONFIG_JOYSTICK_WARRIOR=m
# CONFIG_JOYSTICK_MAGELLAN is not set
CONFIG_JOYSTICK_SPACEORB=m
# CONFIG_JOYSTICK_SPACEBALL is not set
# CONFIG_JOYSTICK_STINGER is not set
# CONFIG_JOYSTICK_TWIDJOY is not set
# CONFIG_JOYSTICK_ZHENHUA is not set
CONFIG_JOYSTICK_JOYDUMP=m
# CONFIG_JOYSTICK_XPAD is not set
CONFIG_INPUT_TABLET=y
CONFIG_TABLET_USB_ACECAD=m
CONFIG_TABLET_USB_AIPTEK=m
CONFIG_TABLET_USB_GTCO=m
CONFIG_TABLET_USB_HANWANG=m
# CONFIG_TABLET_USB_KBTAB is not set
CONFIG_TABLET_USB_WACOM=m
CONFIG_INPUT_TOUCHSCREEN=y
# CONFIG_TOUCHSCREEN_ADS7846 is not set
CONFIG_TOUCHSCREEN_AD7877=m
# CONFIG_TOUCHSCREEN_AD7879 is not set
# CONFIG_TOUCHSCREEN_DYNAPRO is not set
# CONFIG_TOUCHSCREEN_HAMPSHIRE is not set
CONFIG_TOUCHSCREEN_FUJITSU=m
CONFIG_TOUCHSCREEN_GUNZE=m
# CONFIG_TOUCHSCREEN_ELO is not set
CONFIG_TOUCHSCREEN_WACOM_W8001=m
# CONFIG_TOUCHSCREEN_MTOUCH is not set
# CONFIG_TOUCHSCREEN_INEXIO is not set
# CONFIG_TOUCHSCREEN_MK712 is not set
CONFIG_TOUCHSCREEN_PENMOUNT=m
CONFIG_TOUCHSCREEN_TOUCHRIGHT=m
CONFIG_TOUCHSCREEN_TOUCHWIN=m
CONFIG_TOUCHSCREEN_USB_COMPOSITE=m
CONFIG_TOUCHSCREEN_USB_EGALAX=y
CONFIG_TOUCHSCREEN_USB_PANJIT=y
CONFIG_TOUCHSCREEN_USB_3M=y
CONFIG_TOUCHSCREEN_USB_ITM=y
CONFIG_TOUCHSCREEN_USB_ETURBO=y
CONFIG_TOUCHSCREEN_USB_GUNZE=y
CONFIG_TOUCHSCREEN_USB_DMC_TSC10=y
CONFIG_TOUCHSCREEN_USB_IRTOUCH=y
CONFIG_TOUCHSCREEN_USB_IDEALTEK=y
CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH=y
CONFIG_TOUCHSCREEN_USB_GOTOP=y
CONFIG_TOUCHSCREEN_USB_JASTEC=y
# CONFIG_TOUCHSCREEN_USB_E2I is not set
CONFIG_TOUCHSCREEN_USB_ZYTRONIC=y
CONFIG_TOUCHSCREEN_USB_ETT_TC45USB=y
CONFIG_TOUCHSCREEN_USB_NEXIO=y
# CONFIG_TOUCHSCREEN_TOUCHIT213 is not set
CONFIG_TOUCHSCREEN_TSC_SERIO=m
# CONFIG_TOUCHSCREEN_TSC2005 is not set
CONFIG_INPUT_MISC=y
CONFIG_INPUT_AD714X=m
# CONFIG_INPUT_AD714X_SPI is not set
# CONFIG_INPUT_PCSPKR is not set
CONFIG_INPUT_WISTRON_BTNS=m
# CONFIG_INPUT_ATI_REMOTE2 is not set
CONFIG_INPUT_KEYSPAN_REMOTE=m
# CONFIG_INPUT_POWERMATE is not set
# CONFIG_INPUT_YEALINK is not set
# CONFIG_INPUT_CM109 is not set
CONFIG_INPUT_UINPUT=m
# CONFIG_INPUT_GPIO_ROTARY_ENCODER is not set
CONFIG_INPUT_ADXL34X=m
# CONFIG_INPUT_ADXL34X_SPI is not set
CONFIG_INPUT_CMA3000=m
#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
CONFIG_SERIO_SERPORT=m
CONFIG_SERIO_CT82C710=m
# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
CONFIG_SERIO_RAW=m
# CONFIG_SERIO_ALTERA_PS2 is not set
# CONFIG_SERIO_PS2MULT is not set
CONFIG_GAMEPORT=m
CONFIG_GAMEPORT_NS558=m
# CONFIG_GAMEPORT_L4 is not set
# CONFIG_GAMEPORT_EMU10K1 is not set
CONFIG_GAMEPORT_FM801=m
#
# Character devices
#
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_VT_CONSOLE_SLEEP=y
CONFIG_HW_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
CONFIG_UNIX98_PTYS=y
# CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=256
# CONFIG_SERIAL_NONSTANDARD is not set
CONFIG_NOZOMI=m
CONFIG_N_GSM=m
# CONFIG_TRACE_ROUTER is not set
CONFIG_TRACE_SINK=m
CONFIG_DEVKMEM=y
#
# Serial drivers
#
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_FIX_EARLYCON_MEM=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
# CONFIG_SERIAL_8250_EXTENDED is not set
CONFIG_SERIAL_8250_MCA=m
#
# Non-8250 serial port support
#
# CONFIG_SERIAL_MAX3100 is not set
# CONFIG_SERIAL_MAX3107 is not set
CONFIG_SERIAL_MFD_HSU=m
# CONFIG_SERIAL_UARTLITE is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
# CONFIG_SERIAL_JSM is not set
CONFIG_SERIAL_TIMBERDALE=m
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
CONFIG_SERIAL_ALTERA_UART=m
CONFIG_SERIAL_ALTERA_UART_MAXPORTS=4
CONFIG_SERIAL_ALTERA_UART_BAUDRATE=115200
CONFIG_SERIAL_IFX6X60=m
# CONFIG_SERIAL_PCH_UART is not set
CONFIG_SERIAL_XILINX_PS_UART=m
# CONFIG_VIRTIO_CONSOLE is not set
CONFIG_IPMI_HANDLER=m
# CONFIG_IPMI_PANIC_EVENT is not set
# CONFIG_IPMI_DEVICE_INTERFACE is not set
# CONFIG_IPMI_SI is not set
CONFIG_IPMI_WATCHDOG=m
# CONFIG_IPMI_POWEROFF is not set
CONFIG_HW_RANDOM=m
CONFIG_HW_RANDOM_TIMERIOMEM=m
# CONFIG_HW_RANDOM_INTEL is not set
# CONFIG_HW_RANDOM_AMD is not set
CONFIG_HW_RANDOM_GEODE=m
CONFIG_HW_RANDOM_VIA=m
CONFIG_HW_RANDOM_VIRTIO=m
CONFIG_NVRAM=m
# CONFIG_RTC is not set
# CONFIG_GEN_RTC is not set
# CONFIG_R3964 is not set
CONFIG_APPLICOM=m
# CONFIG_SONYPI is not set
CONFIG_MWAVE=m
# CONFIG_SCx200_GPIO is not set
# CONFIG_PC8736x_GPIO is not set
# CONFIG_NSC_GPIO is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_HANGCHECK_TIMER is not set
CONFIG_TCG_TPM=y
CONFIG_TCG_TIS=y
CONFIG_TCG_NSC=m
CONFIG_TCG_ATMEL=m
CONFIG_TELCLOCK=m
CONFIG_DEVPORT=y
# CONFIG_RAMOOPS is not set
# CONFIG_I2C is not set
CONFIG_SPI=y
CONFIG_SPI_DEBUG=y
CONFIG_SPI_MASTER=y
#
# SPI Master Controller Drivers
#
# CONFIG_SPI_ALTERA is not set
CONFIG_SPI_BITBANG=m
# CONFIG_SPI_GPIO is not set
CONFIG_SPI_OC_TINY=m
# CONFIG_SPI_PXA2XX is not set
# CONFIG_SPI_PXA2XX_PCI is not set
CONFIG_SPI_TOPCLIFF_PCH=m
# CONFIG_SPI_XILINX is not set
# CONFIG_SPI_DESIGNWARE is not set
#
# SPI Protocol Masters
#
# CONFIG_SPI_SPIDEV is not set
CONFIG_SPI_TLE62X0=m
#
# PPS support
#
# CONFIG_PPS is not set
#
# PPS generators support
#
#
# PTP clock support
#
#
# Enable Device Drivers -> PPS to see the PTP clock options.
#
CONFIG_ARCH_WANT_OPTIONAL_GPIOLIB=y
CONFIG_GPIOLIB=y
CONFIG_DEBUG_GPIO=y
# CONFIG_GPIO_SYSFS is not set
CONFIG_GPIO_GENERIC=m
CONFIG_GPIO_MAX730X=m
#
# Memory mapped GPIO drivers:
#
CONFIG_GPIO_GENERIC_PLATFORM=m
CONFIG_GPIO_IT8761E=m
CONFIG_GPIO_SCH=m
CONFIG_GPIO_VX855=m
#
# I2C GPIO expanders:
#
#
# PCI GPIO expanders:
#
CONFIG_GPIO_CS5535=m
# CONFIG_GPIO_BT8XX is not set
# CONFIG_GPIO_LANGWELL is not set
CONFIG_GPIO_PCH=m
CONFIG_GPIO_ML_IOH=m
# CONFIG_GPIO_TIMBERDALE is not set
CONFIG_GPIO_RDC321X=m
#
# SPI GPIO expanders:
#
CONFIG_GPIO_MAX7301=m
# CONFIG_GPIO_MCP23S08 is not set
CONFIG_GPIO_MC33880=m
CONFIG_GPIO_74X164=m
#
# AC97 GPIO expanders:
#
#
# MODULbus GPIO expanders:
#
CONFIG_GPIO_JANZ_TTL=m
CONFIG_W1=m
#
# 1-wire Bus Masters
#
# CONFIG_W1_MASTER_MATROX is not set
CONFIG_W1_MASTER_DS2490=m
CONFIG_W1_MASTER_DS1WM=m
# CONFIG_W1_MASTER_GPIO is not set
#
# 1-wire Slaves
#
# CONFIG_W1_SLAVE_THERM is not set
CONFIG_W1_SLAVE_SMEM=m
# CONFIG_W1_SLAVE_DS2408 is not set
CONFIG_W1_SLAVE_DS2423=m
# CONFIG_W1_SLAVE_DS2431 is not set
# CONFIG_W1_SLAVE_DS2433 is not set
# CONFIG_W1_SLAVE_DS2760 is not set
CONFIG_W1_SLAVE_DS2780=m
CONFIG_W1_SLAVE_BQ27000=m
CONFIG_POWER_SUPPLY=m
# CONFIG_POWER_SUPPLY_DEBUG is not set
# CONFIG_PDA_POWER is not set
# CONFIG_TEST_POWER is not set
CONFIG_BATTERY_DS2780=m
# CONFIG_BATTERY_BQ27x00 is not set
CONFIG_CHARGER_ISP1704=m
# CONFIG_CHARGER_MAX8903 is not set
# CONFIG_CHARGER_GPIO is not set
# CONFIG_HWMON is not set
# CONFIG_THERMAL is not set
# CONFIG_WATCHDOG is not set
CONFIG_SSB_POSSIBLE=y
#
# Sonics Silicon Backplane
#
CONFIG_SSB=m
CONFIG_SSB_PCIHOST_POSSIBLE=y
# CONFIG_SSB_PCIHOST is not set
CONFIG_SSB_SDIOHOST_POSSIBLE=y
# CONFIG_SSB_SDIOHOST is not set
CONFIG_SSB_DEBUG=y
CONFIG_BCMA_POSSIBLE=y
#
# Broadcom specific AMBA
#
CONFIG_BCMA=m
CONFIG_BCMA_HOST_PCI_POSSIBLE=y
# CONFIG_BCMA_HOST_PCI is not set
# CONFIG_BCMA_DEBUG is not set
#
# Multifunction device drivers
#
CONFIG_MFD_CORE=m
CONFIG_MFD_SM501=m
CONFIG_MFD_SM501_GPIO=y
# CONFIG_HTC_PASIC3 is not set
# CONFIG_MFD_TPS65912_SPI is not set
# CONFIG_MFD_TMIO is not set
# CONFIG_MFD_WM831X_SPI is not set
# CONFIG_MFD_MC13XXX is not set
CONFIG_ABX500_CORE=y
# CONFIG_EZX_PCAP is not set
# CONFIG_AB8500_CORE is not set
CONFIG_MFD_CS5535=m
CONFIG_MFD_TIMBERDALE=m
CONFIG_LPC_SCH=m
CONFIG_MFD_RDC321X=m
CONFIG_MFD_JANZ_CMODIO=m
CONFIG_MFD_VX855=m
# CONFIG_REGULATOR is not set
# CONFIG_MEDIA_SUPPORT is not set
#
# Graphics support
#
CONFIG_AGP=m
CONFIG_AGP_ALI=m
CONFIG_AGP_ATI=m
# CONFIG_AGP_AMD is not set
CONFIG_AGP_AMD64=m
CONFIG_AGP_INTEL=m
CONFIG_AGP_NVIDIA=m
# CONFIG_AGP_SIS is not set
CONFIG_AGP_SWORKS=m
# CONFIG_AGP_VIA is not set
CONFIG_AGP_EFFICEON=m
CONFIG_VGA_ARB=y
CONFIG_VGA_ARB_MAX_GPUS=16
# CONFIG_DRM is not set
# CONFIG_STUB_POULSBO is not set
# CONFIG_VGASTATE is not set
CONFIG_VIDEO_OUTPUT_CONTROL=m
# CONFIG_FB is not set
CONFIG_BACKLIGHT_LCD_SUPPORT=y
CONFIG_LCD_CLASS_DEVICE=m
CONFIG_LCD_L4F00242T03=m
# CONFIG_LCD_LMS283GF05 is not set
# CONFIG_LCD_LTV350QV is not set
CONFIG_LCD_ILI9320=m
CONFIG_LCD_TDO24M=m
CONFIG_LCD_VGG2432A4=m
# CONFIG_LCD_PLATFORM is not set
CONFIG_LCD_S6E63M0=m
# CONFIG_LCD_LD9040 is not set
CONFIG_LCD_AMS369FG06=m
CONFIG_BACKLIGHT_CLASS_DEVICE=m
CONFIG_BACKLIGHT_GENERIC=m
CONFIG_BACKLIGHT_PROGEAR=m
# CONFIG_BACKLIGHT_SAHARA is not set
#
# Display device support
#
CONFIG_DISPLAY_SUPPORT=m
#
# Display hardware drivers
#
#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
CONFIG_VGACON_SOFT_SCROLLBACK=y
CONFIG_VGACON_SOFT_SCROLLBACK_SIZE=64
CONFIG_DUMMY_CONSOLE=y
CONFIG_FONT_8x16=y
CONFIG_SOUND=m
CONFIG_SOUND_OSS_CORE=y
CONFIG_SOUND_OSS_CORE_PRECLAIM=y
# CONFIG_SND is not set
CONFIG_SOUND_PRIME=m
CONFIG_SOUND_OSS=m
# CONFIG_SOUND_TRACEINIT is not set
CONFIG_SOUND_DMAP=y
CONFIG_SOUND_VMIDI=m
# CONFIG_SOUND_TRIX is not set
CONFIG_SOUND_MSS=m
# CONFIG_SOUND_MPU401 is not set
# CONFIG_SOUND_PAS is not set
CONFIG_SOUND_PSS=m
# CONFIG_PSS_MIXER is not set
# CONFIG_SOUND_SB is not set
# CONFIG_SOUND_YM3812 is not set
CONFIG_SOUND_UART6850=m
# CONFIG_SOUND_AEDSP16 is not set
# CONFIG_HID_SUPPORT is not set
CONFIG_USB_MOUSE=y
CONFIG_USB_SUPPORT=y
CONFIG_USB_COMMON=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB_ARCH_HAS_XHCI=y
CONFIG_USB=y
CONFIG_USB_DEBUG=y
CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
CONFIG_USB_DEVICE_CLASS=y
CONFIG_USB_DYNAMIC_MINORS=y
# CONFIG_USB_DWC3 is not set
CONFIG_USB_MON=m
CONFIG_USB_WUSB=m
CONFIG_USB_WUSB_CBAF=m
# CONFIG_USB_WUSB_CBAF_DEBUG is not set
#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
# CONFIG_USB_XHCI_HCD is not set
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_EHCI_TT_NEWSCHED=y
CONFIG_USB_OXU210HP_HCD=m
CONFIG_USB_ISP116X_HCD=m
CONFIG_USB_ISP1760_HCD=m
# CONFIG_USB_ISP1362_HCD is not set
CONFIG_USB_OHCI_HCD=y
# CONFIG_USB_OHCI_BIG_ENDIAN_DESC is not set
# CONFIG_USB_OHCI_BIG_ENDIAN_MMIO is not set
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
CONFIG_USB_UHCI_HCD=y
# CONFIG_USB_U132_HCD is not set
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
# CONFIG_USB_HWA_HCD is not set
#
# USB Device Class drivers
#
CONFIG_USB_ACM=m
# CONFIG_USB_PRINTER is not set
# CONFIG_USB_WDM is not set
CONFIG_USB_TMC=m
#
# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
#
#
# also be needed; see USB_STORAGE Help for more info
#
# CONFIG_USB_STORAGE is not set
# CONFIG_USB_UAS is not set
CONFIG_USB_LIBUSUAL=y
#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
CONFIG_USB_MICROTEK=m
#
# USB port drivers
#
CONFIG_USB_SERIAL=m
CONFIG_USB_EZUSB=y
# CONFIG_USB_SERIAL_GENERIC is not set
# CONFIG_USB_SERIAL_AIRCABLE is not set
# CONFIG_USB_SERIAL_ARK3116 is not set
CONFIG_USB_SERIAL_BELKIN=m
# CONFIG_USB_SERIAL_CH341 is not set
CONFIG_USB_SERIAL_WHITEHEAT=m
# CONFIG_USB_SERIAL_DIGI_ACCELEPORT is not set
# CONFIG_USB_SERIAL_CP210X is not set
# CONFIG_USB_SERIAL_CYPRESS_M8 is not set
# CONFIG_USB_SERIAL_EMPEG is not set
CONFIG_USB_SERIAL_FTDI_SIO=m
CONFIG_USB_SERIAL_FUNSOFT=m
CONFIG_USB_SERIAL_VISOR=m
CONFIG_USB_SERIAL_IPAQ=m
# CONFIG_USB_SERIAL_IR is not set
# CONFIG_USB_SERIAL_EDGEPORT is not set
CONFIG_USB_SERIAL_EDGEPORT_TI=m
# CONFIG_USB_SERIAL_GARMIN is not set
# CONFIG_USB_SERIAL_IPW is not set
CONFIG_USB_SERIAL_IUU=m
CONFIG_USB_SERIAL_KEYSPAN_PDA=m
# CONFIG_USB_SERIAL_KEYSPAN is not set
# CONFIG_USB_SERIAL_KLSI is not set
CONFIG_USB_SERIAL_KOBIL_SCT=m
# CONFIG_USB_SERIAL_MCT_U232 is not set
CONFIG_USB_SERIAL_MOS7720=m
CONFIG_USB_SERIAL_MOS7840=m
# CONFIG_USB_SERIAL_MOTOROLA is not set
CONFIG_USB_SERIAL_NAVMAN=m
# CONFIG_USB_SERIAL_PL2303 is not set
CONFIG_USB_SERIAL_OTI6858=m
# CONFIG_USB_SERIAL_QCAUX is not set
CONFIG_USB_SERIAL_QUALCOMM=m
# CONFIG_USB_SERIAL_SPCP8X5 is not set
# CONFIG_USB_SERIAL_HP4X is not set
# CONFIG_USB_SERIAL_SAFE is not set
CONFIG_USB_SERIAL_SIEMENS_MPI=m
CONFIG_USB_SERIAL_SIERRAWIRELESS=m
CONFIG_USB_SERIAL_SYMBOL=m
# CONFIG_USB_SERIAL_TI is not set
CONFIG_USB_SERIAL_CYBERJACK=m
CONFIG_USB_SERIAL_XIRCOM=m
CONFIG_USB_SERIAL_WWAN=m
CONFIG_USB_SERIAL_OPTION=m
CONFIG_USB_SERIAL_OMNINET=m
# CONFIG_USB_SERIAL_OPTICON is not set
CONFIG_USB_SERIAL_VIVOPAY_SERIAL=m
# CONFIG_USB_SERIAL_ZIO is not set
CONFIG_USB_SERIAL_SSU100=m
CONFIG_USB_SERIAL_DEBUG=m
#
# USB Miscellaneous drivers
#
CONFIG_USB_EMI62=m
CONFIG_USB_EMI26=m
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_SEVSEG is not set
# CONFIG_USB_RIO500 is not set
CONFIG_USB_LEGOTOWER=m
# CONFIG_USB_LCD is not set
CONFIG_USB_LED=m
# CONFIG_USB_CYPRESS_CY7C63 is not set
CONFIG_USB_CYTHERM=m
# CONFIG_USB_IDMOUSE is not set
CONFIG_USB_FTDI_ELAN=m
CONFIG_USB_APPLEDISPLAY=m
CONFIG_USB_SISUSBVGA=m
CONFIG_USB_SISUSBVGA_CON=y
# CONFIG_USB_LD is not set
CONFIG_USB_TRANCEVIBRATOR=m
CONFIG_USB_IOWARRIOR=m
CONFIG_USB_TEST=m
CONFIG_USB_ISIGHTFW=m
CONFIG_USB_YUREX=m
CONFIG_USB_ATM=m
# CONFIG_USB_SPEEDTOUCH is not set
CONFIG_USB_CXACRU=m
CONFIG_USB_UEAGLEATM=m
# CONFIG_USB_XUSBATM is not set
# CONFIG_USB_GADGET is not set
#
# OTG and related infrastructure
#
CONFIG_USB_OTG_UTILS=y
CONFIG_USB_GPIO_VBUS=m
# CONFIG_NOP_USB_XCEIV is not set
CONFIG_UWB=m
# CONFIG_UWB_HWA is not set
# CONFIG_UWB_WHCI is not set
CONFIG_MMC=m
CONFIG_MMC_DEBUG=y
CONFIG_MMC_UNSAFE_RESUME=y
CONFIG_MMC_CLKGATE=y
#
# MMC/SD/SDIO Card Drivers
#
# CONFIG_MMC_BLOCK is not set
# CONFIG_SDIO_UART is not set
CONFIG_MMC_TEST=m
#
# MMC/SD/SDIO Host Controller Drivers
#
CONFIG_MMC_SDHCI=m
# CONFIG_MMC_SDHCI_PCI is not set
CONFIG_MMC_SDHCI_PLTFM=m
CONFIG_MMC_WBSD=m
# CONFIG_MMC_TIFM_SD is not set
CONFIG_MMC_CB710=m
CONFIG_MMC_VIA_SDMMC=m
CONFIG_MMC_VUB300=m
# CONFIG_MMC_USHC is not set
CONFIG_MEMSTICK=m
CONFIG_MEMSTICK_DEBUG=y
#
# MemoryStick drivers
#
CONFIG_MEMSTICK_UNSAFE_RESUME=y
# CONFIG_MSPRO_BLOCK is not set
#
# MemoryStick Host Controller Drivers
#
# CONFIG_MEMSTICK_TIFM_MS is not set
# CONFIG_MEMSTICK_JMICRON_38X is not set
# CONFIG_MEMSTICK_R592 is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y
#
# LED drivers
#
CONFIG_LEDS_GPIO=m
# CONFIG_LEDS_CLEVO_MAIL is not set
# CONFIG_LEDS_DAC124S085 is not set
CONFIG_LEDS_LT3593=m
# CONFIG_LEDS_TRIGGERS is not set
#
# LED Triggers
#
# CONFIG_ACCESSIBILITY is not set
CONFIG_INFINIBAND=m
# CONFIG_INFINIBAND_USER_MAD is not set
# CONFIG_INFINIBAND_USER_ACCESS is not set
CONFIG_INFINIBAND_ADDR_TRANS=y
# CONFIG_INFINIBAND_MTHCA is not set
# CONFIG_INFINIBAND_AMSO1100 is not set
# CONFIG_INFINIBAND_CXGB4 is not set
CONFIG_MLX4_INFINIBAND=m
# CONFIG_INFINIBAND_NES is not set
# CONFIG_INFINIBAND_IPOIB is not set
CONFIG_INFINIBAND_SRP=m
# CONFIG_INFINIBAND_ISER is not set
CONFIG_EDAC=y
#
# Reporting subsystems
#
CONFIG_EDAC_DEBUG=y
# CONFIG_EDAC_DECODE_MCE is not set
CONFIG_EDAC_MM_EDAC=m
# CONFIG_EDAC_AMD76X is not set
CONFIG_EDAC_E7XXX=m
CONFIG_EDAC_E752X=m
CONFIG_EDAC_I82875P=m
# CONFIG_EDAC_I82975X is not set
CONFIG_EDAC_I3000=m
# CONFIG_EDAC_I3200 is not set
CONFIG_EDAC_X38=m
CONFIG_EDAC_I5400=m
CONFIG_EDAC_I82860=m
# CONFIG_EDAC_R82600 is not set
# CONFIG_EDAC_I5000 is not set
CONFIG_EDAC_I5100=m
CONFIG_EDAC_I7300=m
# CONFIG_RTC_CLASS is not set
CONFIG_DMADEVICES=y
CONFIG_DMADEVICES_DEBUG=y
CONFIG_DMADEVICES_VDEBUG=y
#
# DMA Devices
#
CONFIG_INTEL_MID_DMAC=m
CONFIG_INTEL_IOATDMA=m
CONFIG_TIMB_DMA=m
# CONFIG_PCH_DMA is not set
CONFIG_DMA_ENGINE=y
#
# DMA Clients
#
CONFIG_NET_DMA=y
# CONFIG_ASYNC_TX_DMA is not set
CONFIG_DMATEST=m
CONFIG_DCA=m
CONFIG_AUXDISPLAY=y
CONFIG_UIO=m
# CONFIG_UIO_CIF is not set
CONFIG_UIO_PDRV=m
# CONFIG_UIO_PDRV_GENIRQ is not set
# CONFIG_UIO_AEC is not set
# CONFIG_UIO_SERCOS3 is not set
# CONFIG_UIO_PCI_GENERIC is not set
# CONFIG_UIO_NETX is not set
CONFIG_VIRTIO=m
CONFIG_VIRTIO_RING=m
#
# Virtio drivers
#
# CONFIG_VIRTIO_PCI is not set
# CONFIG_VIRTIO_BALLOON is not set
CONFIG_VIRTIO_MMIO=m
CONFIG_X86_PLATFORM_DEVICES=y
CONFIG_DELL_LAPTOP=m
CONFIG_SENSORS_HDAPS=m
# CONFIG_IBM_RTL is not set
# CONFIG_SAMSUNG_Q10 is not set
#
# Hardware Spinlock drivers
#
CONFIG_CLKSRC_I8253=y
CONFIG_CLKEVT_I8253=y
CONFIG_I8253_LOCK=y
CONFIG_CLKBLD_I8253=y
CONFIG_IOMMU_SUPPORT=y
# CONFIG_VIRT_DRIVERS is not set
# CONFIG_PM_DEVFREQ is not set
#
# Firmware Drivers
#
# CONFIG_EDD is not set
CONFIG_FIRMWARE_MEMMAP=y
CONFIG_DELL_RBU=m
CONFIG_DCDBAS=m
# CONFIG_DMIID is not set
# CONFIG_DMI_SYSFS is not set
# CONFIG_ISCSI_IBFT_FIND is not set
# CONFIG_GOOGLE_FIRMWARE is not set
#
# File systems
#
# CONFIG_EXT2_FS is not set
CONFIG_EXT3_FS=y
CONFIG_EXT3_DEFAULTS_TO_ORDERED=y
CONFIG_EXT3_FS_XATTR=y
CONFIG_EXT3_FS_POSIX_ACL=y
CONFIG_EXT3_FS_SECURITY=y
# CONFIG_EXT4_FS is not set
CONFIG_JBD=y
CONFIG_JBD_DEBUG=y
CONFIG_JBD2=m
# CONFIG_JBD2_DEBUG is not set
CONFIG_FS_MBCACHE=y
CONFIG_REISERFS_FS=m
# CONFIG_REISERFS_CHECK is not set
# CONFIG_REISERFS_PROC_INFO is not set
# CONFIG_REISERFS_FS_XATTR is not set
# CONFIG_JFS_FS is not set
CONFIG_XFS_FS=m
CONFIG_XFS_QUOTA=y
# CONFIG_XFS_POSIX_ACL is not set
# CONFIG_XFS_RT is not set
CONFIG_XFS_DEBUG=y
CONFIG_OCFS2_FS=m
CONFIG_OCFS2_FS_O2CB=m
# CONFIG_OCFS2_FS_USERSPACE_CLUSTER is not set
# CONFIG_OCFS2_FS_STATS is not set
# CONFIG_OCFS2_DEBUG_MASKLOG is not set
CONFIG_OCFS2_DEBUG_FS=y
# CONFIG_BTRFS_FS is not set
CONFIG_NILFS2_FS=m
CONFIG_FS_POSIX_ACL=y
CONFIG_EXPORTFS=y
CONFIG_FILE_LOCKING=y
CONFIG_FSNOTIFY=y
CONFIG_DNOTIFY=y
CONFIG_INOTIFY_USER=y
CONFIG_FANOTIFY=y
# CONFIG_FANOTIFY_ACCESS_PERMISSIONS is not set
CONFIG_QUOTA=y
CONFIG_QUOTA_NETLINK_INTERFACE=y
# CONFIG_PRINT_QUOTA_WARNING is not set
# CONFIG_QUOTA_DEBUG is not set
CONFIG_QUOTA_TREE=m
CONFIG_QFMT_V1=m
# CONFIG_QFMT_V2 is not set
CONFIG_QUOTACTL=y
# CONFIG_AUTOFS4_FS is not set
CONFIG_FUSE_FS=m
CONFIG_CUSE=m
#
# Caches
#
# CONFIG_FSCACHE is not set
#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=m
# CONFIG_JOLIET is not set
# CONFIG_ZISOFS is not set
# CONFIG_UDF_FS is not set
#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=m
# CONFIG_MSDOS_FS is not set
CONFIG_VFAT_FS=m
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
# CONFIG_NTFS_FS is not set
#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
# CONFIG_PROC_KCORE is not set
# CONFIG_PROC_VMCORE is not set
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SYSFS=y
# CONFIG_TMPFS is not set
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
CONFIG_CONFIGFS_FS=m
CONFIG_MISC_FILESYSTEMS=y
CONFIG_ADFS_FS=m
# CONFIG_ADFS_FS_RW is not set
CONFIG_AFFS_FS=m
# CONFIG_ECRYPT_FS is not set
# CONFIG_HFS_FS is not set
CONFIG_HFSPLUS_FS=m
CONFIG_BEFS_FS=m
# CONFIG_BEFS_DEBUG is not set
# CONFIG_BFS_FS is not set
CONFIG_EFS_FS=m
CONFIG_LOGFS=m
# CONFIG_CRAMFS is not set
CONFIG_SQUASHFS=m
# CONFIG_SQUASHFS_XATTR is not set
# CONFIG_SQUASHFS_ZLIB is not set
# CONFIG_SQUASHFS_LZO is not set
# CONFIG_SQUASHFS_XZ is not set
CONFIG_SQUASHFS_4K_DEVBLK_SIZE=y
# CONFIG_SQUASHFS_EMBEDDED is not set
CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE=3
CONFIG_VXFS_FS=m
CONFIG_MINIX_FS=m
# CONFIG_OMFS_FS is not set
CONFIG_HPFS_FS=m
CONFIG_QNX4FS_FS=m
CONFIG_ROMFS_FS=m
CONFIG_ROMFS_BACKED_BY_BLOCK=y
CONFIG_ROMFS_ON_BLOCK=y
CONFIG_PSTORE=y
CONFIG_SYSV_FS=m
# CONFIG_UFS_FS is not set
# CONFIG_NETWORK_FILESYSTEMS is not set
#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
# CONFIG_ACORN_PARTITION is not set
CONFIG_OSF_PARTITION=y
# CONFIG_AMIGA_PARTITION is not set
# CONFIG_ATARI_PARTITION is not set
CONFIG_MAC_PARTITION=y
CONFIG_MSDOS_PARTITION=y
CONFIG_BSD_DISKLABEL=y
# CONFIG_MINIX_SUBPARTITION is not set
CONFIG_SOLARIS_X86_PARTITION=y
# CONFIG_UNIXWARE_DISKLABEL is not set
# CONFIG_LDM_PARTITION is not set
# CONFIG_SGI_PARTITION is not set
# CONFIG_ULTRIX_PARTITION is not set
# CONFIG_SUN_PARTITION is not set
# CONFIG_KARMA_PARTITION is not set
# CONFIG_EFI_PARTITION is not set
# CONFIG_SYSV68_PARTITION is not set
CONFIG_NLS=y
CONFIG_NLS_BASE=y
CONFIG_NLS_DEFAULT="iso8859-1"
# CONFIG_NLS_CODEPAGE_437 is not set
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
# CONFIG_NLS_CODEPAGE_850 is not set
CONFIG_NLS_CODEPAGE_852=m
CONFIG_NLS_CODEPAGE_855=m
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
CONFIG_NLS_CODEPAGE_862=m
# CONFIG_NLS_CODEPAGE_863 is not set
CONFIG_NLS_CODEPAGE_864=m
CONFIG_NLS_CODEPAGE_865=m
CONFIG_NLS_CODEPAGE_866=m
CONFIG_NLS_CODEPAGE_869=m
CONFIG_NLS_CODEPAGE_936=m
CONFIG_NLS_CODEPAGE_950=m
CONFIG_NLS_CODEPAGE_932=m
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
CONFIG_NLS_ISO8859_8=m
# CONFIG_NLS_CODEPAGE_1250 is not set
CONFIG_NLS_CODEPAGE_1251=m
CONFIG_NLS_ASCII=m
CONFIG_NLS_ISO8859_1=m
# CONFIG_NLS_ISO8859_2 is not set
CONFIG_NLS_ISO8859_3=m
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
CONFIG_NLS_ISO8859_7=m
# CONFIG_NLS_ISO8859_9 is not set
CONFIG_NLS_ISO8859_13=m
# CONFIG_NLS_ISO8859_14 is not set
CONFIG_NLS_ISO8859_15=m
CONFIG_NLS_KOI8_R=m
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=m
CONFIG_DLM=m
# CONFIG_DLM_DEBUG is not set
#
# Kernel hacking
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_PRINTK_TIME=y
CONFIG_DEFAULT_MESSAGE_LOGLEVEL=4
CONFIG_ENABLE_WARN_DEPRECATED=y
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_FRAME_WARN=1024
CONFIG_MAGIC_SYSRQ=y
# CONFIG_STRIP_ASM_SYMS is not set
CONFIG_UNUSED_SYMBOLS=y
CONFIG_DEBUG_FS=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_SECTION_MISMATCH is not set
CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_SHIRQ=y
CONFIG_LOCKUP_DETECTOR=y
CONFIG_HARDLOCKUP_DETECTOR=y
CONFIG_BOOTPARAM_HARDLOCKUP_PANIC=y
CONFIG_BOOTPARAM_HARDLOCKUP_PANIC_VALUE=1
CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC=y
CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC_VALUE=1
# CONFIG_DETECT_HUNG_TASK is not set
# CONFIG_SCHED_DEBUG is not set
CONFIG_SCHEDSTATS=y
# CONFIG_TIMER_STATS is not set
CONFIG_DEBUG_OBJECTS=y
CONFIG_DEBUG_OBJECTS_SELFTEST=y
# CONFIG_DEBUG_OBJECTS_FREE is not set
# CONFIG_DEBUG_OBJECTS_TIMERS is not set
CONFIG_DEBUG_OBJECTS_WORK=y
CONFIG_DEBUG_OBJECTS_RCU_HEAD=y
# CONFIG_DEBUG_OBJECTS_PERCPU_COUNTER is not set
CONFIG_DEBUG_OBJECTS_ENABLE_DEFAULT=1
# CONFIG_SLUB_DEBUG_ON is not set
CONFIG_SLUB_STATS=y
# CONFIG_DEBUG_RT_MUTEXES is not set
CONFIG_RT_MUTEX_TESTER=y
CONFIG_DEBUG_SPINLOCK=y
CONFIG_DEBUG_MUTEXES=y
# CONFIG_DEBUG_LOCK_ALLOC is not set
# CONFIG_PROVE_LOCKING is not set
CONFIG_SPARSE_RCU_POINTER=y
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_ATOMIC_SLEEP is not set
CONFIG_DEBUG_LOCKING_API_SELFTESTS=y
CONFIG_STACKTRACE=y
# CONFIG_DEBUG_STACK_USAGE is not set
CONFIG_DEBUG_HIGHMEM=y
CONFIG_DEBUG_BUGVERBOSE=y
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_VIRTUAL is not set
CONFIG_DEBUG_WRITECOUNT=y
CONFIG_DEBUG_MEMORY_INIT=y
# CONFIG_DEBUG_LIST is not set
# CONFIG_TEST_LIST_SORT is not set
# CONFIG_DEBUG_SG is not set
CONFIG_DEBUG_NOTIFIERS=y
CONFIG_DEBUG_CREDENTIALS=y
CONFIG_ARCH_WANT_FRAME_POINTERS=y
CONFIG_FRAME_POINTER=y
CONFIG_BOOT_PRINTK_DELAY=y
CONFIG_RCU_TORTURE_TEST=m
CONFIG_RCU_CPU_STALL_TIMEOUT=60
CONFIG_BACKTRACE_SELF_TEST=m
CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y
CONFIG_DEBUG_PER_CPU_MAPS=y
# CONFIG_LKDTM is not set
CONFIG_CPU_NOTIFIER_ERROR_INJECT=m
# CONFIG_FAULT_INJECTION is not set
# CONFIG_LATENCYTOP is not set
CONFIG_SYSCTL_SYSCALL_CHECK=y
# CONFIG_DEBUG_PAGEALLOC is not set
CONFIG_USER_STACKTRACE_SUPPORT=y
CONFIG_NOP_TRACER=y
CONFIG_HAVE_FTRACE_NMI_ENTER=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST=y
CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_HAVE_C_RECORDMCOUNT=y
CONFIG_TRACER_MAX_TRACE=y
CONFIG_RING_BUFFER=y
CONFIG_FTRACE_NMI_ENTER=y
CONFIG_EVENT_TRACING=y
# CONFIG_EVENT_POWER_TRACING_DEPRECATED is not set
CONFIG_CONTEXT_SWITCH_TRACER=y
CONFIG_TRACING=y
CONFIG_GENERIC_TRACER=y
CONFIG_TRACING_SUPPORT=y
CONFIG_FTRACE=y
CONFIG_FUNCTION_TRACER=y
CONFIG_FUNCTION_GRAPH_TRACER=y
# CONFIG_IRQSOFF_TRACER is not set
CONFIG_SCHED_TRACER=y
# CONFIG_FTRACE_SYSCALLS is not set
CONFIG_BRANCH_PROFILE_NONE=y
CONFIG_STACK_TRACER=y
# CONFIG_BLK_DEV_IO_TRACE is not set
CONFIG_DYNAMIC_FTRACE=y
# CONFIG_FUNCTION_PROFILER is not set
CONFIG_FTRACE_MCOUNT_RECORD=y
# CONFIG_MMIOTRACE is not set
# CONFIG_PROVIDE_OHCI1394_DMA_INIT is not set
# CONFIG_FIREWIRE_OHCI_REMOTE_DMA is not set
# CONFIG_DYNAMIC_DEBUG is not set
CONFIG_DMA_API_DEBUG=y
# CONFIG_ATOMIC64_SELFTEST is not set
CONFIG_SAMPLES=y
# CONFIG_SAMPLE_TRACEPOINTS is not set
# CONFIG_SAMPLE_TRACE_EVENTS is not set
# CONFIG_SAMPLE_KOBJECT is not set
# CONFIG_SAMPLE_HW_BREAKPOINT is not set
# CONFIG_SAMPLE_KFIFO is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
CONFIG_HAVE_ARCH_KMEMCHECK=y
# CONFIG_TEST_KSTRTOX is not set
CONFIG_STRICT_DEVMEM=y
CONFIG_X86_VERBOSE_BOOTUP=y
CONFIG_EARLY_PRINTK=y
CONFIG_EARLY_PRINTK_DBGP=y
CONFIG_DEBUG_STACKOVERFLOW=y
CONFIG_X86_PTDUMP=y
# CONFIG_DEBUG_RODATA is not set
# CONFIG_DEBUG_SET_MODULE_RONX is not set
# CONFIG_DEBUG_NX_TEST is not set
CONFIG_DOUBLEFAULT=y
CONFIG_IOMMU_STRESS=y
CONFIG_HAVE_MMIOTRACE_SUPPORT=y
CONFIG_IO_DELAY_TYPE_0X80=0
CONFIG_IO_DELAY_TYPE_0XED=1
CONFIG_IO_DELAY_TYPE_UDELAY=2
CONFIG_IO_DELAY_TYPE_NONE=3
CONFIG_IO_DELAY_0X80=y
# CONFIG_IO_DELAY_0XED is not set
# CONFIG_IO_DELAY_UDELAY is not set
# CONFIG_IO_DELAY_NONE is not set
CONFIG_DEFAULT_IO_DELAY_TYPE=0
# CONFIG_DEBUG_BOOT_PARAMS is not set
# CONFIG_CPA_DEBUG is not set
# CONFIG_OPTIMIZE_INLINING is not set
CONFIG_DEBUG_NMI_SELFTEST=y
#
# Security options
#
CONFIG_KEYS=y
CONFIG_TRUSTED_KEYS=m
CONFIG_ENCRYPTED_KEYS=m
CONFIG_KEYS_DEBUG_PROC_KEYS=y
CONFIG_SECURITY_DMESG_RESTRICT=y
CONFIG_SECURITY=y
CONFIG_SECURITYFS=y
CONFIG_SECURITY_NETWORK=y
CONFIG_SECURITY_NETWORK_XFRM=y
CONFIG_SECURITY_PATH=y
CONFIG_SECURITY_TOMOYO=y
CONFIG_SECURITY_TOMOYO_MAX_ACCEPT_ENTRY=2048
CONFIG_SECURITY_TOMOYO_MAX_AUDIT_LOG=1024
CONFIG_SECURITY_TOMOYO_POLICY_LOADER="/sbin/tomoyo-init"
CONFIG_SECURITY_TOMOYO_ACTIVATION_TRIGGER="/sbin/init"
# CONFIG_SECURITY_APPARMOR is not set
CONFIG_INTEGRITY=y
CONFIG_IMA=y
CONFIG_IMA_MEASURE_PCR_IDX=10
CONFIG_IMA_AUDIT=y
CONFIG_DEFAULT_SECURITY_TOMOYO=y
# CONFIG_DEFAULT_SECURITY_DAC is not set
CONFIG_DEFAULT_SECURITY="tomoyo"
CONFIG_ASYNC_TX_DISABLE_PQ_VAL_DMA=y
CONFIG_ASYNC_TX_DISABLE_XOR_VAL_DMA=y
CONFIG_CRYPTO=y
#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD=m
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_BLKCIPHER=m
CONFIG_CRYPTO_BLKCIPHER2=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG=m
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_PCOMP2=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
CONFIG_CRYPTO_USER=m
# CONFIG_CRYPTO_MANAGER_DISABLE_TESTS is not set
CONFIG_CRYPTO_GF128MUL=m
CONFIG_CRYPTO_NULL=m
# CONFIG_CRYPTO_PCRYPT is not set
CONFIG_CRYPTO_WORKQUEUE=y
CONFIG_CRYPTO_CRYPTD=m
CONFIG_CRYPTO_AUTHENC=m
CONFIG_CRYPTO_TEST=m
#
# Authenticated Encryption with Associated Data
#
CONFIG_CRYPTO_CCM=m
CONFIG_CRYPTO_GCM=m
CONFIG_CRYPTO_SEQIV=m
#
# Block modes
#
CONFIG_CRYPTO_CBC=m
CONFIG_CRYPTO_CTR=m
CONFIG_CRYPTO_CTS=m
CONFIG_CRYPTO_ECB=m
CONFIG_CRYPTO_LRW=m
CONFIG_CRYPTO_PCBC=m
CONFIG_CRYPTO_XTS=m
#
# Hash modes
#
CONFIG_CRYPTO_HMAC=y
# CONFIG_CRYPTO_XCBC is not set
CONFIG_CRYPTO_VMAC=m
#
# Digest
#
CONFIG_CRYPTO_CRC32C=m
CONFIG_CRYPTO_CRC32C_INTEL=m
CONFIG_CRYPTO_GHASH=m
CONFIG_CRYPTO_MD4=m
CONFIG_CRYPTO_MD5=y
CONFIG_CRYPTO_MICHAEL_MIC=m
CONFIG_CRYPTO_RMD128=m
CONFIG_CRYPTO_RMD160=m
CONFIG_CRYPTO_RMD256=m
# CONFIG_CRYPTO_RMD320 is not set
CONFIG_CRYPTO_SHA1=y
CONFIG_CRYPTO_SHA256=m
# CONFIG_CRYPTO_SHA512 is not set
# CONFIG_CRYPTO_TGR192 is not set
CONFIG_CRYPTO_WP512=m
#
# Ciphers
#
CONFIG_CRYPTO_AES=m
CONFIG_CRYPTO_AES_586=m
CONFIG_CRYPTO_AES_NI_INTEL=m
# CONFIG_CRYPTO_ANUBIS is not set
CONFIG_CRYPTO_ARC4=m
# CONFIG_CRYPTO_BLOWFISH is not set
CONFIG_CRYPTO_CAMELLIA=m
# CONFIG_CRYPTO_CAST5 is not set
CONFIG_CRYPTO_CAST6=m
CONFIG_CRYPTO_DES=m
CONFIG_CRYPTO_FCRYPT=m
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_SALSA20 is not set
# CONFIG_CRYPTO_SALSA20_586 is not set
# CONFIG_CRYPTO_SEED is not set
# CONFIG_CRYPTO_SERPENT is not set
# CONFIG_CRYPTO_TEA is not set
CONFIG_CRYPTO_TWOFISH=m
CONFIG_CRYPTO_TWOFISH_COMMON=m
# CONFIG_CRYPTO_TWOFISH_586 is not set
#
# Compression
#
CONFIG_CRYPTO_DEFLATE=m
# CONFIG_CRYPTO_ZLIB is not set
# CONFIG_CRYPTO_LZO is not set
#
# Random Number Generation
#
# CONFIG_CRYPTO_ANSI_CPRNG is not set
CONFIG_CRYPTO_USER_API=m
CONFIG_CRYPTO_USER_API_HASH=m
CONFIG_CRYPTO_USER_API_SKCIPHER=m
CONFIG_CRYPTO_HW=y
# CONFIG_CRYPTO_DEV_PADLOCK is not set
# CONFIG_CRYPTO_DEV_GEODE is not set
# CONFIG_CRYPTO_DEV_HIFN_795X is not set
CONFIG_HAVE_KVM=y
CONFIG_HAVE_KVM_IRQCHIP=y
CONFIG_HAVE_KVM_EVENTFD=y
CONFIG_KVM_APIC_ARCHITECTURE=y
CONFIG_KVM_MMIO=y
CONFIG_KVM_ASYNC_PF=y
CONFIG_VIRTUALIZATION=y
CONFIG_KVM=m
# CONFIG_KVM_INTEL is not set
CONFIG_KVM_AMD=m
# CONFIG_KVM_MMU_AUDIT is not set
# CONFIG_VHOST_NET is not set
# CONFIG_LGUEST is not set
CONFIG_BINARY_PRINTF=y
#
# Library routines
#
CONFIG_BITREVERSE=y
CONFIG_GENERIC_FIND_FIRST_BIT=y
CONFIG_CRC_CCITT=m
CONFIG_CRC16=m
CONFIG_CRC_T10DIF=y
CONFIG_CRC_ITU_T=m
CONFIG_CRC32=y
# CONFIG_CRC7 is not set
CONFIG_LIBCRC32C=m
# CONFIG_CRC8 is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=m
CONFIG_LZO_COMPRESS=y
CONFIG_LZO_DECOMPRESS=y
CONFIG_XZ_DEC=y
CONFIG_XZ_DEC_X86=y
CONFIG_XZ_DEC_POWERPC=y
CONFIG_XZ_DEC_IA64=y
CONFIG_XZ_DEC_ARM=y
CONFIG_XZ_DEC_ARMTHUMB=y
CONFIG_XZ_DEC_SPARC=y
CONFIG_XZ_DEC_BCJ=y
CONFIG_XZ_DEC_TEST=m
CONFIG_DECOMPRESS_GZIP=y
CONFIG_DECOMPRESS_BZIP2=y
CONFIG_DECOMPRESS_LZMA=y
CONFIG_DECOMPRESS_XZ=y
CONFIG_DECOMPRESS_LZO=y
CONFIG_BTREE=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y
CONFIG_CHECK_SIGNATURE=y
CONFIG_CPUMASK_OFFSTACK=y
CONFIG_CPU_RMAP=y
CONFIG_NLATTR=y
CONFIG_AVERAGE=y
CONFIG_CORDIC=m
CONFIG_FORCE_SUCCESSFUL_BUILD=y
CONFIG_FORCE_MINIMAL_CONFIG=y
CONFIG_FORCE_MINIMAL_CONFIG_PHYS=y
CONFIG_X86_32_ALWAYS_ON=y
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [tip:x86/debug] x86, NMI: Add NMI IPI selftest
2011-12-06 9:06 ` Ingo Molnar
@ 2011-12-06 18:08 ` Don Zickus
2011-12-06 20:01 ` Ingo Molnar
` (2 more replies)
0 siblings, 3 replies; 21+ messages in thread
From: Don Zickus @ 2011-12-06 18:08 UTC (permalink / raw)
To: Ingo Molnar
Cc: mingo, hpa, linux-kernel, andi, torvalds, peterz, robert.richter,
tglx, linux-tip-commits
On Tue, Dec 06, 2011 at 10:06:12AM +0100, Ingo Molnar wrote:
>
> * tip-bot for Don Zickus <dzickus@redhat.com> wrote:
>
> > Commit-ID: 99e8b9ca90d688c3ac7d3a141b701c9694a93925
> > Gitweb: http://git.kernel.org/tip/99e8b9ca90d688c3ac7d3a141b701c9694a93925
> > Author: Don Zickus <dzickus@redhat.com>
> > AuthorDate: Thu, 13 Oct 2011 15:14:26 -0400
> > Committer: Ingo Molnar <mingo@elte.hu>
> > CommitDate: Mon, 5 Dec 2011 12:00:16 +0100
> >
> > x86, NMI: Add NMI IPI selftest
>
> The NMI test-suite has caught some badness:
>
> [ 0.179992] calling tracer_alloc_buffers+0x0/0x224 @ 1
> [ 0.183417] initcall tracer_alloc_buffers+0x0/0x224 returned 0 after 0 usecs
> [ 0.186658] calling init_trace_printk+0x0/0xf @ 1
> [ 0.189992] initcall init_trace_printk+0x0/0xf returned 0 after 0 usecs
> [ 0.193324] Brought up 1 CPUs
> [ 0.196657] ----------------
> [ 0.199989] | NMI testsuite:
> [ 0.203322] --------------------
> [ 0.206655] remote IPI:
> [ 0.209991] ------------[ cut here ]------------
> [ 0.213325] WARNING: at arch/x86/kernel/apic/ipi.c:109 default_send_IPI_mask_logical+0xdb/0x120()
> [ 0.216655] Hardware name: System Product Name
> [ 0.219987] empty IPI mask
> [ 0.223321] Modules linked in:
> [ 0.227015] Pid: 1, comm: swapper/0 Tainted: G W 3.2.0-rc4-tip+ #163124
> [ 0.229987] Call Trace:
> [ 0.233326] [<c102e2a2>] warn_slowpath_common+0x72/0xa0
> [ 0.236656] [<c101e04b>] ? default_send_IPI_mask_logical+0xdb/0x120
> [ 0.239989] [<c101e04b>] ? default_send_IPI_mask_logical+0xdb/0x120
> [ 0.243321] [<c102e373>] warn_slowpath_fmt+0x33/0x40
> [ 0.246655] [<c101e04b>] default_send_IPI_mask_logical+0xdb/0x120
> [ 0.249988] [<c1024025>] test_nmi_ipi.constprop.2+0x55/0xb0
> [ 0.253320] [<c10240c8>] remote_ipi+0x48/0x80
> [ 0.256654] [<c102417d>] dotest.constprop.3+0xd/0x90
> [ 0.259987] [<c1024265>] nmi_selftest+0x65/0x120
> [ 0.263320] [<c14d4e73>] native_smp_cpus_done+0x15/0xff
> [ 0.266653] [<c14ddf3f>] smp_init+0xdb/0xe2
> [ 0.269988] [<c14cb7bb>] ? start_kernel+0x386/0x386
> [ 0.273320] [<c14cb81d>] kernel_init+0x62/0x118
> [ 0.276653] [<c138bb3e>] kernel_thread_helper+0x6/0x10
>
> That's an empty IPI mask. NOTE the boot parameters i used:
I'm on paternity leave, so I hacked this up for now and compiled tested
this. On Monday I can dive into this further if the patch below doesn't
solve it.
----8<----
From: Don Zickus <dzickus@redhat.com>
Date: Tue, 6 Dec 2011 13:03:18 -0500
Subject: [PATCH] x86, NMI: NMI-selftest should handle UP case properly
If no remote cpus are online, then just quietly skip the remote IPI
test for now.
Signed-off-by: Don Zickus <dzickus@redhat.com>
---
arch/x86/kernel/nmi_selftest.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kernel/nmi_selftest.c b/arch/x86/kernel/nmi_selftest.c
index 572adb6..1e42a23 100644
--- a/arch/x86/kernel/nmi_selftest.c
+++ b/arch/x86/kernel/nmi_selftest.c
@@ -90,7 +90,8 @@ static void remote_ipi(void)
{
cpumask_copy(to_cpumask(nmi_ipi_mask), cpu_online_mask);
cpumask_clear_cpu(smp_processor_id(), to_cpumask(nmi_ipi_mask));
- test_nmi_ipi(to_cpumask(nmi_ipi_mask));
+ if (!cpumask_empty(nmi_ipi_mask))
+ test_nmi_ipi(to_cpumask(nmi_ipi_mask));
}
static void local_ipi(void)
--
1.7.6.4
^ permalink raw reply related [flat|nested] 21+ messages in thread
* Re: [tip:x86/debug] x86, NMI: Add NMI IPI selftest
2011-12-06 18:08 ` Don Zickus
@ 2011-12-06 20:01 ` Ingo Molnar
2011-12-06 20:25 ` [tip:x86/debug] x86, NMI: NMI-selftest should handle the UP case properly tip-bot for Don Zickus
2011-12-07 11:06 ` [patch] x86, NMI: add to_cpumask() to silence compile warning Dan Carpenter
2 siblings, 0 replies; 21+ messages in thread
From: Ingo Molnar @ 2011-12-06 20:01 UTC (permalink / raw)
To: Don Zickus
Cc: mingo, hpa, linux-kernel, andi, torvalds, peterz, robert.richter,
tglx, linux-tip-commits
* Don Zickus <dzickus@redhat.com> wrote:
> On Tue, Dec 06, 2011 at 10:06:12AM +0100, Ingo Molnar wrote:
> >
> > * tip-bot for Don Zickus <dzickus@redhat.com> wrote:
> >
> > > Commit-ID: 99e8b9ca90d688c3ac7d3a141b701c9694a93925
> > > Gitweb: http://git.kernel.org/tip/99e8b9ca90d688c3ac7d3a141b701c9694a93925
> > > Author: Don Zickus <dzickus@redhat.com>
> > > AuthorDate: Thu, 13 Oct 2011 15:14:26 -0400
> > > Committer: Ingo Molnar <mingo@elte.hu>
> > > CommitDate: Mon, 5 Dec 2011 12:00:16 +0100
> > >
> > > x86, NMI: Add NMI IPI selftest
> >
> > The NMI test-suite has caught some badness:
> >
> > [ 0.179992] calling tracer_alloc_buffers+0x0/0x224 @ 1
> > [ 0.183417] initcall tracer_alloc_buffers+0x0/0x224 returned 0 after 0 usecs
> > [ 0.186658] calling init_trace_printk+0x0/0xf @ 1
> > [ 0.189992] initcall init_trace_printk+0x0/0xf returned 0 after 0 usecs
> > [ 0.193324] Brought up 1 CPUs
> > [ 0.196657] ----------------
> > [ 0.199989] | NMI testsuite:
> > [ 0.203322] --------------------
> > [ 0.206655] remote IPI:
> > [ 0.209991] ------------[ cut here ]------------
> > [ 0.213325] WARNING: at arch/x86/kernel/apic/ipi.c:109 default_send_IPI_mask_logical+0xdb/0x120()
> > [ 0.216655] Hardware name: System Product Name
> > [ 0.219987] empty IPI mask
> > [ 0.223321] Modules linked in:
> > [ 0.227015] Pid: 1, comm: swapper/0 Tainted: G W 3.2.0-rc4-tip+ #163124
> > [ 0.229987] Call Trace:
> > [ 0.233326] [<c102e2a2>] warn_slowpath_common+0x72/0xa0
> > [ 0.236656] [<c101e04b>] ? default_send_IPI_mask_logical+0xdb/0x120
> > [ 0.239989] [<c101e04b>] ? default_send_IPI_mask_logical+0xdb/0x120
> > [ 0.243321] [<c102e373>] warn_slowpath_fmt+0x33/0x40
> > [ 0.246655] [<c101e04b>] default_send_IPI_mask_logical+0xdb/0x120
> > [ 0.249988] [<c1024025>] test_nmi_ipi.constprop.2+0x55/0xb0
> > [ 0.253320] [<c10240c8>] remote_ipi+0x48/0x80
> > [ 0.256654] [<c102417d>] dotest.constprop.3+0xd/0x90
> > [ 0.259987] [<c1024265>] nmi_selftest+0x65/0x120
> > [ 0.263320] [<c14d4e73>] native_smp_cpus_done+0x15/0xff
> > [ 0.266653] [<c14ddf3f>] smp_init+0xdb/0xe2
> > [ 0.269988] [<c14cb7bb>] ? start_kernel+0x386/0x386
> > [ 0.273320] [<c14cb81d>] kernel_init+0x62/0x118
> > [ 0.276653] [<c138bb3e>] kernel_thread_helper+0x6/0x10
> >
> > That's an empty IPI mask. NOTE the boot parameters i used:
>
> I'm on paternity leave, [...]
Congrats! :)
> [...] so I hacked this up for now and compiled tested this.
> On Monday I can dive into this further if the patch below
> doesn't solve it.
I'll apply this one and will let you know if there are other
problems (but i think it will solve it).
Thanks,
Ingo
^ permalink raw reply [flat|nested] 21+ messages in thread
* [tip:x86/debug] x86, NMI: NMI-selftest should handle the UP case properly
2011-12-06 18:08 ` Don Zickus
2011-12-06 20:01 ` Ingo Molnar
@ 2011-12-06 20:25 ` tip-bot for Don Zickus
2011-12-07 11:06 ` [patch] x86, NMI: add to_cpumask() to silence compile warning Dan Carpenter
2 siblings, 0 replies; 21+ messages in thread
From: tip-bot for Don Zickus @ 2011-12-06 20:25 UTC (permalink / raw)
To: linux-tip-commits; +Cc: linux-kernel, hpa, mingo, tglx, mingo, dzickus
Commit-ID: 565cbc3e934f221369a656b4469a044aa4c3f2a8
Gitweb: http://git.kernel.org/tip/565cbc3e934f221369a656b4469a044aa4c3f2a8
Author: Don Zickus <dzickus@redhat.com>
AuthorDate: Tue, 6 Dec 2011 13:08:59 -0500
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Tue, 6 Dec 2011 21:02:39 +0100
x86, NMI: NMI-selftest should handle the UP case properly
If no remote cpus are online, then just quietly skip the remote
IPI test for now.
Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: andi@firstfloor.org
Cc: torvalds@linux-foundation.org
Cc: peterz@infradead.org
Cc: robert.richter@amd.com
Link: http://lkml.kernel.org/r/20111206180859.GR1669@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86/kernel/nmi_selftest.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kernel/nmi_selftest.c b/arch/x86/kernel/nmi_selftest.c
index 572adb6..1e42a23 100644
--- a/arch/x86/kernel/nmi_selftest.c
+++ b/arch/x86/kernel/nmi_selftest.c
@@ -90,7 +90,8 @@ static void remote_ipi(void)
{
cpumask_copy(to_cpumask(nmi_ipi_mask), cpu_online_mask);
cpumask_clear_cpu(smp_processor_id(), to_cpumask(nmi_ipi_mask));
- test_nmi_ipi(to_cpumask(nmi_ipi_mask));
+ if (!cpumask_empty(nmi_ipi_mask))
+ test_nmi_ipi(to_cpumask(nmi_ipi_mask));
}
static void local_ipi(void)
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [patch] x86, NMI: add to_cpumask() to silence compile warning
2011-12-06 18:08 ` Don Zickus
2011-12-06 20:01 ` Ingo Molnar
2011-12-06 20:25 ` [tip:x86/debug] x86, NMI: NMI-selftest should handle the UP case properly tip-bot for Don Zickus
@ 2011-12-07 11:06 ` Dan Carpenter
2011-12-07 14:59 ` Don Zickus
2011-12-07 21:12 ` Don Zickus
2 siblings, 2 replies; 21+ messages in thread
From: Dan Carpenter @ 2011-12-07 11:06 UTC (permalink / raw)
To: Don Zickus
Cc: Ingo Molnar, mingo, hpa, linux-kernel, andi, torvalds, peterz,
robert.richter, tglx, linux-tip-commits
[-- Attachment #1: Type: text/plain, Size: 774 bytes --]
Gcc complains if we don't cast this to a struct cpumask pointer.
arch/x86/kernel/nmi_selftest.c:93:2:
warning: passing argument 1 of ‘cpumask_empty’ from
incompatible pointer type [enabled by default]
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/arch/x86/kernel/nmi_selftest.c b/arch/x86/kernel/nmi_selftest.c
index 1e42a23..0d01a8e 100644
--- a/arch/x86/kernel/nmi_selftest.c
+++ b/arch/x86/kernel/nmi_selftest.c
@@ -90,7 +90,7 @@ static void remote_ipi(void)
{
cpumask_copy(to_cpumask(nmi_ipi_mask), cpu_online_mask);
cpumask_clear_cpu(smp_processor_id(), to_cpumask(nmi_ipi_mask));
- if (!cpumask_empty(nmi_ipi_mask))
+ if (!cpumask_empty(to_cpumask(nmi_ipi_mask)))
test_nmi_ipi(to_cpumask(nmi_ipi_mask));
}
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 836 bytes --]
^ permalink raw reply related [flat|nested] 21+ messages in thread
* Re: [patch] x86, NMI: add to_cpumask() to silence compile warning
2011-12-07 11:06 ` [patch] x86, NMI: add to_cpumask() to silence compile warning Dan Carpenter
@ 2011-12-07 14:59 ` Don Zickus
2011-12-07 21:12 ` Don Zickus
1 sibling, 0 replies; 21+ messages in thread
From: Don Zickus @ 2011-12-07 14:59 UTC (permalink / raw)
To: Dan Carpenter
Cc: Ingo Molnar, mingo, hpa, linux-kernel, andi, torvalds, peterz,
robert.richter, tglx, linux-tip-commits
On Wed, Dec 07, 2011 at 02:06:12PM +0300, Dan Carpenter wrote:
> Gcc complains if we don't cast this to a struct cpumask pointer.
> arch/x86/kernel/nmi_selftest.c:93:2:
> warning: passing argument 1 of ‘cpumask_empty’ from
> incompatible pointer type [enabled by default]
>
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Crap, I knew I rushed the patch. Thanks for catching this obvious bug.
Acked-by: Don Zickus <dzickus@redhat.com>
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [patch] x86, NMI: add to_cpumask() to silence compile warning
2011-12-07 11:06 ` [patch] x86, NMI: add to_cpumask() to silence compile warning Dan Carpenter
2011-12-07 14:59 ` Don Zickus
@ 2011-12-07 21:12 ` Don Zickus
1 sibling, 0 replies; 21+ messages in thread
From: Don Zickus @ 2011-12-07 21:12 UTC (permalink / raw)
To: Dan Carpenter
Cc: Ingo Molnar, mingo, hpa, linux-kernel, andi, torvalds, peterz,
robert.richter, tglx, linux-tip-commits
On Wed, Dec 07, 2011 at 02:06:12PM +0300, Dan Carpenter wrote:
> Gcc complains if we don't cast this to a struct cpumask pointer.
> arch/x86/kernel/nmi_selftest.c:93:2:
> warning: passing argument 1 of ‘cpumask_empty’ from
> incompatible pointer type [enabled by default]
>
Crap, another fallout found by Randy.
Cheers,
Don
---8<---
From: Don Zickus <dzickus@redhat.com>
Date: Wed, 7 Dec 2011 16:03:40 -0500
Subject: [PATCH] x86, NMI: NMI selftest depends on the local apic
The selftest doesn't work with out a local apic for now.
Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Don Zickus <dzickus@redhat.com>
---
arch/x86/Kconfig.debug | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 020a4f1..d6eea6d 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -286,7 +286,7 @@ config DEBUG_STRICT_USER_COPY_CHECKS
config DEBUG_NMI_SELFTEST
bool "NMI Selftest"
- depends on DEBUG_KERNEL
+ depends on DEBUG_KERNEL && X86_LOCAL_APIC
---help---
Enabling this option turns on a quick NMI selftest to verify
that the NMI behaves correctly.
--
1.7.6.4
^ permalink raw reply related [flat|nested] 21+ messages in thread
* Re: [tip:x86/debug] x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpus
2011-12-05 13:21 ` [tip:x86/debug] " tip-bot for Don Zickus
@ 2011-12-20 22:38 ` Yinghai Lu
2011-12-21 14:59 ` Don Zickus
0 siblings, 1 reply; 21+ messages in thread
From: Yinghai Lu @ 2011-12-20 22:38 UTC (permalink / raw)
To: mingo, hpa, linux-kernel, andi, torvalds, peterz, robert.richter,
tglx, mingo, dzickus
Cc: linux-tip-commits
On Mon, Dec 5, 2011 at 5:21 AM, tip-bot for Don Zickus
<dzickus@redhat.com> wrote:
> Commit-ID: 3603a2512f9e69dc87914ba922eb4a0812b21cd6
> Gitweb: http://git.kernel.org/tip/3603a2512f9e69dc87914ba922eb4a0812b21cd6
> Author: Don Zickus <dzickus@redhat.com>
> AuthorDate: Thu, 13 Oct 2011 15:14:25 -0400
> Committer: Ingo Molnar <mingo@elte.hu>
> CommitDate: Mon, 5 Dec 2011 12:00:14 +0100
>
> x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpus
>
> A recent discussion started talking about the locking on the
> pstore fs and how it relates to the kmsg infrastructure. We
> noticed it was possible for userspace to r/w to the pstore fs
> (grabbing the locks in the process) and block the panic path
> from r/w to the same fs.
>
> The reason was the cpu with the lock could be doing work while
> the crashing cpu is panic'ing. Busting those spinlocks might
> cause those cpus to step on each other's data. Fine, fair
> enough.
>
> It was suggested it would be nice to serialize the panic path
> (ie stop the other cpus) and have only one cpu running. This
> would allow us to bust the spinlocks and not worry about another
> cpu stepping on the data.
>
> Of course, smp_send_stop() does this in the panic case.
> kmsg_dump() would have to be moved to be called after it. Easy
> enough.
>
> The only problem is on x86 the smp_send_stop() function calls
> the REBOOT_VECTOR. Any cpu with irqs disabled (which pstore and
> its backend ERST would do), block this IPI and thus do not stop.
> This makes it difficult to reliably log data to the pstore fs.
>
> The patch below switches from the REBOOT_VECTOR to NMI (and
> mimics what kdump does). Switching to NMI allows us to deliver
> the IPI when irqs are disabled, increasing the reliability of
> this function.
>
> However, Andi carefully noted that on some machines this
> approach does not work because of broken BIOSes or whatever.
>
> To help accomodate this, the next couple of patches will run a
> selftest and provide a knob to disable.
>
> V2:
> uses atomic ops to serialize the cpu that shuts everyone down
> V3:
> comment cleanup
>
> Signed-off-by: Don Zickus <dzickus@redhat.com>
> Cc: Linus Torvalds <torvalds@linux-foundation.org>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Robert Richter <robert.richter@amd.com>
> Cc: seiji.aguchi@hds.com
> Cc: vgoyal@redhat.com
> Cc: mjg@redhat.com
> Cc: tony.luck@intel.com
> Cc: gong.chen@intel.com
> Cc: satoru.moriya@hds.com
> Cc: avi@redhat.com
> Cc: Andi Kleen <andi@firstfloor.org>
> Link: http://lkml.kernel.org/r/1318533267-18880-2-git-send-email-dzickus@redhat.com
> Signed-off-by: Ingo Molnar <mingo@elte.hu>
> ---
> arch/x86/kernel/smp.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++-
> 1 files changed, 57 insertions(+), 2 deletions(-)
>
> diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
> index 16204dc..e72b175 100644
> --- a/arch/x86/kernel/smp.c
> +++ b/arch/x86/kernel/smp.c
> @@ -29,6 +29,7 @@
> #include <asm/mmu_context.h>
> #include <asm/proto.h>
> #include <asm/apic.h>
> +#include <asm/nmi.h>
> /*
> * Some notes on x86 processor bugs affecting SMP operation:
> *
> @@ -148,6 +149,60 @@ void native_send_call_func_ipi(const struct cpumask *mask)
> free_cpumask_var(allbutself);
> }
>
> +static atomic_t stopping_cpu = ATOMIC_INIT(-1);
> +
> +static int smp_stop_nmi_callback(unsigned int val, struct pt_regs *regs)
> +{
> + /* We are registered on stopping cpu too, avoid spurious NMI */
> + if (raw_smp_processor_id() == atomic_read(&stopping_cpu))
> + return NMI_HANDLED;
> +
> + stop_this_cpu(NULL);
> +
> + return NMI_HANDLED;
> +}
> +
> +static void native_nmi_stop_other_cpus(int wait)
> +{
> + unsigned long flags;
> + unsigned long timeout;
> +
> + if (reboot_force)
> + return;
> +
> + /*
> + * Use an own vector here because smp_call_function
> + * does lots of things not suitable in a panic situation.
> + */
> + if (num_online_cpus() > 1) {
> + /* did someone beat us here? */
> + if (atomic_cmpxchg(&stopping_cpu, -1, safe_smp_processor_id() != -1))
> + return;
> +
> + if (register_nmi_handler(NMI_LOCAL, smp_stop_nmi_callback,
> + NMI_FLAG_FIRST, "smp_stop"))
> + /* Note: we ignore failures here */
> + return;
> +
> + /* sync above data before sending NMI */
> + wmb();
> +
> + apic->send_IPI_allbutself(NMI_VECTOR);
> +
> + /*
> + * Don't wait longer than a second if the caller
> + * didn't ask us to wait.
> + */
> + timeout = USEC_PER_SEC;
> + while (num_online_cpus() > 1 && (wait || timeout--))
> + udelay(1);
> + }
> +
> + local_irq_save(flags);
> + disable_local_APIC();
> + local_irq_restore(flags);
> +}
> +
> /*
> * this function calls the 'stop' function on all other CPUs in the system.
> */
> @@ -160,7 +215,7 @@ asmlinkage void smp_reboot_interrupt(void)
> irq_exit();
> }
>
> -static void native_stop_other_cpus(int wait)
> +static void native_irq_stop_other_cpus(int wait)
> {
> unsigned long flags;
> unsigned long timeout;
> @@ -230,7 +285,7 @@ struct smp_ops smp_ops = {
> .smp_prepare_cpus = native_smp_prepare_cpus,
> .smp_cpus_done = native_smp_cpus_done,
>
> - .stop_other_cpus = native_stop_other_cpus,
> + .stop_other_cpus = native_nmi_stop_other_cpus,
> .smp_send_reschedule = native_smp_send_reschedule,
>
> .cpu_up = native_cpu_up,
this broke kexec on our intel nehalem, westmere and sandbridge platforms.
system get reset while try to kexec second kernel.
3603a2512f9e69dc87914ba922eb4a0812b21cd6 is the first bad commit
commit 3603a2512f9e69dc87914ba922eb4a0812b21cd6
Author: Don Zickus <dzickus@redhat.com>
Date: Thu Oct 13 15:14:25 2011 -0400
x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpus
A recent discussion started talking about the locking on the
pstore fs and how it relates to the kmsg infrastructure. We
noticed it was possible for userspace to r/w to the pstore fs
(grabbing the locks in the process) and block the panic path
from r/w to the same fs.
The reason was the cpu with the lock could be doing work while
the crashing cpu is panic'ing. Busting those spinlocks might
cause those cpus to step on each other's data. Fine, fair
enough.
It was suggested it would be nice to serialize the panic path
(ie stop the other cpus) and have only one cpu running. This
would allow us to bust the spinlocks and not worry about another
cpu stepping on the data.
Of course, smp_send_stop() does this in the panic case.
kmsg_dump() would have to be moved to be called after it. Easy
enough.
The only problem is on x86 the smp_send_stop() function calls
the REBOOT_VECTOR. Any cpu with irqs disabled (which pstore and
its backend ERST would do), block this IPI and thus do not stop.
This makes it difficult to reliably log data to the pstore fs.
The patch below switches from the REBOOT_VECTOR to NMI (and
mimics what kdump does). Switching to NMI allows us to deliver
the IPI when irqs are disabled, increasing the reliability of
this function.
However, Andi carefully noted that on some machines this
approach does not work because of broken BIOSes or whatever.
To help accomodate this, the next couple of patches will run a
selftest and provide a knob to disable.
V2:
uses atomic ops to serialize the cpu that shuts everyone down
V3:
comment cleanup
Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robert Richter <robert.richter@amd.com>
Cc: seiji.aguchi@hds.com
Cc: vgoyal@redhat.com
Cc: mjg@redhat.com
Cc: tony.luck@intel.com
Cc: gong.chen@intel.com
Cc: satoru.moriya@hds.com
Cc: avi@redhat.com
Cc: Andi Kleen <andi@firstfloor.org>
Link:
http://lkml.kernel.org/r/1318533267-18880-2-git-send-email-dzickus@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
:040000 040000 47a646e9ead83f34fb0728d88c786c875fab91dd
6f7a6d5ad8ed686199c0dfbc748ee07a0db97cc5 M arch
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [tip:x86/debug] x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpus
2011-12-20 22:38 ` Yinghai Lu
@ 2011-12-21 14:59 ` Don Zickus
2011-12-21 18:24 ` Yinghai Lu
0 siblings, 1 reply; 21+ messages in thread
From: Don Zickus @ 2011-12-21 14:59 UTC (permalink / raw)
To: Yinghai Lu
Cc: mingo, hpa, linux-kernel, andi, torvalds, peterz, robert.richter,
tglx, mingo, linux-tip-commits
On Tue, Dec 20, 2011 at 02:38:39PM -0800, Yinghai Lu wrote:
> > @@ -230,7 +285,7 @@ struct smp_ops smp_ops = {
> > .smp_prepare_cpus = native_smp_prepare_cpus,
> > .smp_cpus_done = native_smp_cpus_done,
> >
> > - .stop_other_cpus = native_stop_other_cpus,
> > + .stop_other_cpus = native_nmi_stop_other_cpus,
> > .smp_send_reschedule = native_smp_send_reschedule,
> >
> > .cpu_up = native_cpu_up,
>
> this broke kexec on our intel nehalem, westmere and sandbridge platforms.
> system get reset while try to kexec second kernel.
Hmm. Ok. Does the reboot path work correctly? Vivek showed me that the
kexec and reboot paths do the same shutdowns. Perhaps the second kernel
has trouble dealing with cpus spinning in an NMI context and can't
properly reset them.
Let me grab one of those boxes from our lab and try and reproduce the
problem.
Cheers,
Don
>
> 3603a2512f9e69dc87914ba922eb4a0812b21cd6 is the first bad commit
> commit 3603a2512f9e69dc87914ba922eb4a0812b21cd6
> Author: Don Zickus <dzickus@redhat.com>
> Date: Thu Oct 13 15:14:25 2011 -0400
>
> x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpus
>
> A recent discussion started talking about the locking on the
> pstore fs and how it relates to the kmsg infrastructure. We
> noticed it was possible for userspace to r/w to the pstore fs
> (grabbing the locks in the process) and block the panic path
> from r/w to the same fs.
>
> The reason was the cpu with the lock could be doing work while
> the crashing cpu is panic'ing. Busting those spinlocks might
> cause those cpus to step on each other's data. Fine, fair
> enough.
>
> It was suggested it would be nice to serialize the panic path
> (ie stop the other cpus) and have only one cpu running. This
> would allow us to bust the spinlocks and not worry about another
> cpu stepping on the data.
>
> Of course, smp_send_stop() does this in the panic case.
> kmsg_dump() would have to be moved to be called after it. Easy
> enough.
>
> The only problem is on x86 the smp_send_stop() function calls
> the REBOOT_VECTOR. Any cpu with irqs disabled (which pstore and
> its backend ERST would do), block this IPI and thus do not stop.
> This makes it difficult to reliably log data to the pstore fs.
>
> The patch below switches from the REBOOT_VECTOR to NMI (and
> mimics what kdump does). Switching to NMI allows us to deliver
> the IPI when irqs are disabled, increasing the reliability of
> this function.
>
> However, Andi carefully noted that on some machines this
> approach does not work because of broken BIOSes or whatever.
>
> To help accomodate this, the next couple of patches will run a
> selftest and provide a knob to disable.
>
> V2:
> uses atomic ops to serialize the cpu that shuts everyone down
> V3:
> comment cleanup
>
> Signed-off-by: Don Zickus <dzickus@redhat.com>
> Cc: Linus Torvalds <torvalds@linux-foundation.org>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Robert Richter <robert.richter@amd.com>
> Cc: seiji.aguchi@hds.com
> Cc: vgoyal@redhat.com
> Cc: mjg@redhat.com
> Cc: tony.luck@intel.com
> Cc: gong.chen@intel.com
> Cc: satoru.moriya@hds.com
> Cc: avi@redhat.com
> Cc: Andi Kleen <andi@firstfloor.org>
> Link:
> http://lkml.kernel.org/r/1318533267-18880-2-git-send-email-dzickus@redhat.com
> Signed-off-by: Ingo Molnar <mingo@elte.hu>
>
> :040000 040000 47a646e9ead83f34fb0728d88c786c875fab91dd
> 6f7a6d5ad8ed686199c0dfbc748ee07a0db97cc5 M arch
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [tip:x86/debug] x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpus
2011-12-21 14:59 ` Don Zickus
@ 2011-12-21 18:24 ` Yinghai Lu
2011-12-22 20:16 ` Don Zickus
2012-01-05 18:17 ` Don Zickus
0 siblings, 2 replies; 21+ messages in thread
From: Yinghai Lu @ 2011-12-21 18:24 UTC (permalink / raw)
To: Don Zickus
Cc: mingo, hpa, linux-kernel, andi, torvalds, peterz, robert.richter,
tglx, mingo, linux-tip-commits
On Wed, Dec 21, 2011 at 6:59 AM, Don Zickus <dzickus@redhat.com> wrote:
> On Tue, Dec 20, 2011 at 02:38:39PM -0800, Yinghai Lu wrote:
>> > @@ -230,7 +285,7 @@ struct smp_ops smp_ops = {
>> > .smp_prepare_cpus = native_smp_prepare_cpus,
>> > .smp_cpus_done = native_smp_cpus_done,
>> >
>> > - .stop_other_cpus = native_stop_other_cpus,
>> > + .stop_other_cpus = native_nmi_stop_other_cpus,
>> > .smp_send_reschedule = native_smp_send_reschedule,
>> >
>> > .cpu_up = native_cpu_up,
>>
>> this broke kexec on our intel nehalem, westmere and sandbridge platforms.
>> system get reset while try to kexec second kernel.
>
>
> Hmm. Ok. Does the reboot path work correctly?
Yes.
> Vivek showed me that the
> kexec and reboot paths do the same shutdowns. Perhaps the second kernel
> has trouble dealing with cpus spinning in an NMI context and can't
> properly reset them.
not sure.
when use nonmi_ipi in first kernel, it will work well.
Thanks
Yinghai
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [tip:x86/debug] x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpus
2011-12-21 18:24 ` Yinghai Lu
@ 2011-12-22 20:16 ` Don Zickus
2012-01-05 18:17 ` Don Zickus
1 sibling, 0 replies; 21+ messages in thread
From: Don Zickus @ 2011-12-22 20:16 UTC (permalink / raw)
To: Yinghai Lu
Cc: mingo, hpa, linux-kernel, andi, torvalds, peterz, robert.richter,
tglx, mingo, linux-tip-commits
On Wed, Dec 21, 2011 at 10:24:53AM -0800, Yinghai Lu wrote:
> On Wed, Dec 21, 2011 at 6:59 AM, Don Zickus <dzickus@redhat.com> wrote:
> > On Tue, Dec 20, 2011 at 02:38:39PM -0800, Yinghai Lu wrote:
> >> > @@ -230,7 +285,7 @@ struct smp_ops smp_ops = {
> >> > .smp_prepare_cpus = native_smp_prepare_cpus,
> >> > .smp_cpus_done = native_smp_cpus_done,
> >> >
> >> > - .stop_other_cpus = native_stop_other_cpus,
> >> > + .stop_other_cpus = native_nmi_stop_other_cpus,
> >> > .smp_send_reschedule = native_smp_send_reschedule,
> >> >
> >> > .cpu_up = native_cpu_up,
> >>
> >> this broke kexec on our intel nehalem, westmere and sandbridge platforms.
> >> system get reset while try to kexec second kernel.
> >
> >
> > Hmm. Ok. Does the reboot path work correctly?
>
> Yes.
>
> > Vivek showed me that the
> > kexec and reboot paths do the same shutdowns. Perhaps the second kernel
> > has trouble dealing with cpus spinning in an NMI context and can't
> > properly reset them.
>
> not sure.
> when use nonmi_ipi in first kernel, it will work well.
Ok. I tried taking the cpus out of NMI context and putting them into irq
context with irq_work_queue() but that didn't seem to work. It seems to
be hanging in the new kernel somewhere. I'll have to wait until I get
back into the office next year to debug with early_printk and a vga
console.
Cheers,
Don
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [tip:x86/debug] x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpus
2011-12-21 18:24 ` Yinghai Lu
2011-12-22 20:16 ` Don Zickus
@ 2012-01-05 18:17 ` Don Zickus
2012-01-05 21:44 ` Yinghai Lu
1 sibling, 1 reply; 21+ messages in thread
From: Don Zickus @ 2012-01-05 18:17 UTC (permalink / raw)
To: Yinghai Lu
Cc: mingo, hpa, linux-kernel, andi, torvalds, peterz, robert.richter,
tglx, mingo, linux-tip-commits
On Wed, Dec 21, 2011 at 10:24:53AM -0800, Yinghai Lu wrote:
> On Wed, Dec 21, 2011 at 6:59 AM, Don Zickus <dzickus@redhat.com> wrote:
> > On Tue, Dec 20, 2011 at 02:38:39PM -0800, Yinghai Lu wrote:
> >> > @@ -230,7 +285,7 @@ struct smp_ops smp_ops = {
> >> > .smp_prepare_cpus = native_smp_prepare_cpus,
> >> > .smp_cpus_done = native_smp_cpus_done,
> >> >
> >> > - .stop_other_cpus = native_stop_other_cpus,
> >> > + .stop_other_cpus = native_nmi_stop_other_cpus,
> >> > .smp_send_reschedule = native_smp_send_reschedule,
> >> >
> >> > .cpu_up = native_cpu_up,
> >>
> >> this broke kexec on our intel nehalem, westmere and sandbridge platforms.
> >> system get reset while try to kexec second kernel.
> >
> >
> > Hmm. Ok. Does the reboot path work correctly?
>
> Yes.
>
> > Vivek showed me that the
> > kexec and reboot paths do the same shutdowns. Perhaps the second kernel
> > has trouble dealing with cpus spinning in an NMI context and can't
> > properly reset them.
>
> not sure.
> when use nonmi_ipi in first kernel, it will work well.
Hi Yinghai,
Sorry for the delay. I figured out the problem, one of those brown paper
bag moments. :-(
I think this patch should fix your issue (it did on my system).
--->8----
From: Don Zickus <dzickus@redhat.com>
Date: Thu, 5 Jan 2012 13:06:58 -0500
Subject: [PATCH] x86, reboot: typo in nmi reboot path
It was brought to my attention that my x86 change to use NMI in the
reboot path broke Intel Nehalem and Westmere boxes when using kexec.
I realized I had mistyped the if statement in commit
3603a2512f9e69dc87914ba922eb4a0812b21cd6 and stuck the ')' in
the wrong spot. Putting it in the right spot fixes kexec again.
Doh.
Reported-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Don Zickus <dzickus@redhat.com>
---
arch/x86/kernel/smp.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index e72b175..3f3d3f0 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -176,7 +176,7 @@ static void native_nmi_stop_other_cpus(int wait)
*/
if (num_online_cpus() > 1) {
/* did someone beat us here? */
- if (atomic_cmpxchg(&stopping_cpu, -1, safe_smp_processor_id() != -1))
+ if (atomic_cmpxchg(&stopping_cpu, -1, safe_smp_processor_id()) != -1)
return;
if (register_nmi_handler(NMI_LOCAL, smp_stop_nmi_callback,
--
1.7.7.4
^ permalink raw reply related [flat|nested] 21+ messages in thread
* Re: [tip:x86/debug] x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpus
2012-01-05 18:17 ` Don Zickus
@ 2012-01-05 21:44 ` Yinghai Lu
0 siblings, 0 replies; 21+ messages in thread
From: Yinghai Lu @ 2012-01-05 21:44 UTC (permalink / raw)
To: Don Zickus
Cc: mingo, hpa, linux-kernel, andi, torvalds, peterz, robert.richter,
tglx, mingo, linux-tip-commits
> From: Don Zickus <dzickus@redhat.com>
> Date: Thu, 5 Jan 2012 13:06:58 -0500
> Subject: [PATCH] x86, reboot: typo in nmi reboot path
>
> It was brought to my attention that my x86 change to use NMI in the
> reboot path broke Intel Nehalem and Westmere boxes when using kexec.
>
> I realized I had mistyped the if statement in commit
> 3603a2512f9e69dc87914ba922eb4a0812b21cd6 and stuck the ')' in
> the wrong spot. Putting it in the right spot fixes kexec again.
>
> Doh.
>
> Reported-by: Yinghai Lu <yinghai@kernel.org>
> Signed-off-by: Don Zickus <dzickus@redhat.com>
Tested-by: Yinghai Lu <yinghai@kernel.org>
> ---
> arch/x86/kernel/smp.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
> index e72b175..3f3d3f0 100644
> --- a/arch/x86/kernel/smp.c
> +++ b/arch/x86/kernel/smp.c
> @@ -176,7 +176,7 @@ static void native_nmi_stop_other_cpus(int wait)
> */
> if (num_online_cpus() > 1) {
> /* did someone beat us here? */
> - if (atomic_cmpxchg(&stopping_cpu, -1, safe_smp_processor_id() != -1))
> + if (atomic_cmpxchg(&stopping_cpu, -1, safe_smp_processor_id()) != -1)
> return;
>
> if (register_nmi_handler(NMI_LOCAL, smp_stop_nmi_callback,
> --
> 1.7.7.4
>
^ permalink raw reply [flat|nested] 21+ messages in thread
end of thread, other threads:[~2012-01-05 21:44 UTC | newest]
Thread overview: 21+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-10-13 19:14 [v2 PATCH 0/3] Use NMI to stop cpus Don Zickus
2011-10-13 19:14 ` [v2 PATCH 1/3] x86, reboot: Use NMI instead of REBOOT_VECTOR " Don Zickus
2011-12-05 13:21 ` [tip:x86/debug] " tip-bot for Don Zickus
2011-12-20 22:38 ` Yinghai Lu
2011-12-21 14:59 ` Don Zickus
2011-12-21 18:24 ` Yinghai Lu
2011-12-22 20:16 ` Don Zickus
2012-01-05 18:17 ` Don Zickus
2012-01-05 21:44 ` Yinghai Lu
2011-10-13 19:14 ` [v2 PATCH 2/3] x86, NMI: Add NMI IPI selftest Don Zickus
2011-12-05 13:22 ` [tip:x86/debug] " tip-bot for Don Zickus
2011-12-06 9:06 ` Ingo Molnar
2011-12-06 18:08 ` Don Zickus
2011-12-06 20:01 ` Ingo Molnar
2011-12-06 20:25 ` [tip:x86/debug] x86, NMI: NMI-selftest should handle the UP case properly tip-bot for Don Zickus
2011-12-07 11:06 ` [patch] x86, NMI: add to_cpumask() to silence compile warning Dan Carpenter
2011-12-07 14:59 ` Don Zickus
2011-12-07 21:12 ` Don Zickus
2011-10-13 19:14 ` [v2 PATCH 3/3] x86, NMI: knob to disable using NMI IPIs to stop cpus Don Zickus
2011-12-05 13:23 ` [tip:x86/debug] x86, NMI: Add " tip-bot for Don Zickus
2011-11-08 19:25 ` [v2 PATCH 0/3] Use NMI " Don Zickus
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).