* [PATCH v13 00/30] Add new powerpc specific ELF core notes
@ 2016-07-28 2:57 wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 01/30] elf: Add powerpc specific core note sections wei.guo.simon
` (29 more replies)
0 siblings, 30 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Simon Guo <wei.guo.simon@gmail.com>
This patch series adds thirteen new ELF core note sections which can
be used with existing ptrace request PTRACE_GETREG/SET-SETREGSET for
accessing various transactional memory and other miscellaneous debug
register sets on powerpc platform.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
Test Result (All tests pass on both BE and LE)
----------------------------------------------
ptrace-ebb PASS
ptrace-gpr PASS
ptrace-tm-gpr PASS
ptrace-tm-spd-gpr PASS
ptrace-tar PASS
ptrace-tm-tar PASS
ptrace-tm-spd-tar PASS
ptrace-vsx PASS
ptrace-tm-vsx PASS
ptrace-tm-spd-vsx PASS
ptrace-tm-spr PASS
Previous versions:
==================
RFC: https://lkml.org/lkml/2014/4/1/292
V1: https://lkml.org/lkml/2014/4/2/43
V2: https://lkml.org/lkml/2014/5/5/88
V3: https://lkml.org/lkml/2014/5/23/486
V4: https://lkml.org/lkml/2014/11/11/6
V5: https://lkml.org/lkml/2014/11/25/134
V6: https://lkml.org/lkml/2014/12/2/98
V7: https://lkml.org/lkml/2015/1/14/19
V8: https://lkml.org/lkml/2015/5/19/700
V9: https://lkml.org/lkml/2015/10/8/522
V10: https://lkml.org/lkml/2016/2/16/219
V11: https://lkml.org/lkml/2016/7/16/231
V12: https://lkml.org/lkml/2016/7/27/134
Changes in V13:
---------------
- Remove Cc lines from changelog
- Add more Signed-off-by lines of Simon Guo
Changes in V12:
---------------
- Revert change which is trying to incoporate following patch:
[PATCH 3/5] powerpc: tm: Always use fp_state and vr_state to store live registers
- Release share memory resource in all self test cases
- Optimize tfhar usage in ptrace-tm-spr.c
Changes in V11:
---------------
- Rework based on following patch:
[PATCH 3/5] powerpc: tm: Always use fp_state and vr_state to store live registers
- Split EBB/PMU register ptrace implementation.
- Clean some coding style warning
- Added more shared memory based sync between parent and child during TM tests
- Re worded some of the commit messages and cleaned them up
- selftests/powerpc/ebb/reg.h has already moved as selftests/powerpc/reg.h
Dropped the previous patch doing the same thing
- Combined the definitions of SPRN_DSCR from dscr/ test cases
- Fixed dscr/ test cases for new SPRN_DSCR_PRIV definition available
Changes in V10:
---------------
- Rebased against the latest mainline
- Fixed couple of build failures in the test cases related to aux vector
Changes in V9:
--------------
- Fixed static build check failure after tm_orig_msr got dropped
- Fixed asm volatile construct for used registers set
- Fixed EBB, VSX, VMX tests for LE
- Fixed TAR test which was failing because of system calls
- Added checks for PPC_FEATURE2_HTM aux feature in the tests
- Fixed copyright statements
Changes in V8:
--------------
- Split the misc register set into individual ELF core notes
- Implemented support for VSX register set (on and off TM)
- Implemented support for EBB register set
- Implemented review comments on previous versions
- Some code re-arrangements, re-writes and documentation
- Added comprehensive list of test cases into selftests
Changes in V7:
--------------
- Fixed a config directive in the MISC code
- Merged the two gitignore patches into a single one
Changes in V6:
--------------
- Added two git ignore patches for powerpc selftests
- Re-formatted all in-code function definitions in kernel-doc format
Changes in V5:
--------------
- Changed flush_tmregs_to_thread, so not to take into account self tracing
- Dropped the 3rd patch in the series which had merged two functions
- Fixed one build problem for the misc debug register patch
- Accommodated almost all the review comments from Suka on the 6th patch
- Minor changes to the self test program
- Changed commit messages for some of the patches
Changes in V4:
--------------
- Added one test program into the powerpc selftest bucket in this regard
- Split the 2nd patch in the previous series into four different patches
- Accommodated most of the review comments on the previous patch series
- Added a patch to merge functions __switch_to_tm and tm_reclaim_task
Changes in V3:
--------------
- Added two new error paths in every TM related get/set functions when regset
support is not present on the system (ENODEV) or when the process does not
have any transaction active (ENODATA) in the context
- Installed the active hooks for all the newly added regset core note
types
Changes in V2:
--------------
- Removed all the power specific ptrace requests corresponding to new
NT_PPC_*
elf core note types. Now all the register sets can be accessed from
ptrace
through PTRACE_GETREGSET/PTRACE_SETREGSET using the individual
NT_PPC* core
note type instead
- Fixed couple of attribute values for REGSET_TM_CGPR register set
- Renamed flush_tmreg_to_thread as flush_tmregs_to_thread
- Fixed 32 bit checkpointed GPR support
- Changed commit messages accordingly
-------------
Anshuman Khandual (30):
elf: Add powerpc specific core note sections
powerpc/process: Add the function flush_tmregs_to_thread
powerpc/ptrace: Enable in transaction NT_PRFPREG ptrace requests
powerpc/ptrace: Enable in transaction NT_PPC_VMX ptrace requests
powerpc/ptrace: Enable in transaction NT_PPC_VSX ptrace requests
powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction
powerpc/ptrace: Enable support for NT_PPC_CGPR
powerpc/ptrace: Enable support for NT_PPC_CFPR
powerpc/ptrace: Enable support for NT_PPC_CVMX
powerpc/ptrace: Enable support for NT_PPC_CVSX
powerpc/ptrace: Enable support for TM SPR state
powerpc/ptrace: Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR
powerpc/ptrace: Enable support for NT_PPPC_TAR, NT_PPC_PPR,
NT_PPC_DSCR
powerpc/ptrace: Enable support for EBB registers
powerpc/ptrace: Enable support for Performance Monitor registers
selftests/powerpc: Add more SPR numbers, TM & VMX instructions to
'reg.h'
selftests/powerpc: Use the new SPRN_DSCR_PRIV definiton
selftests/powerpc: Add ptrace tests for EBB
selftests/powerpc: Add ptrace tests for GPR/FPR registers
selftests/powerpc: Add ptrace tests for GPR/FPR registers in TM
selftests/powerpc: Add ptrace tests for GPR/FPR registers in suspended
TM
selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR registers
selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR in TM
selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR in suspended TM
selftests/powerpc: Add ptrace tests for VSX, VMX registers
selftests/powerpc: Add ptrace tests for VSX, VMX registers in TM
selftests/powerpc: Add ptrace tests for VSX, VMX registers in
suspended TM
selftests/powerpc: Add ptrace tests for TM SPR registers
selftests/powerpc: Add .gitignore file for ptrace executables
selftests/powerpc: Fix a build issue
arch/powerpc/include/asm/switch_to.h | 8 +
arch/powerpc/include/uapi/asm/elf.h | 5 +
arch/powerpc/kernel/process.c | 20 +
arch/powerpc/kernel/ptrace.c | 1740 ++++++++++++++++++--
include/uapi/linux/elf.h | 13 +
tools/testing/selftests/powerpc/Makefile | 3 +-
.../selftests/powerpc/context_switch/cp_abort.c | 6 +-
tools/testing/selftests/powerpc/dscr/dscr.h | 10 +-
tools/testing/selftests/powerpc/ptrace/.gitignore | 11 +
tools/testing/selftests/powerpc/ptrace/Makefile | 13 +
.../testing/selftests/powerpc/ptrace/ptrace-ebb.c | 185 +++
.../testing/selftests/powerpc/ptrace/ptrace-ebb.h | 102 ++
.../testing/selftests/powerpc/ptrace/ptrace-gpr.c | 199 +++
.../testing/selftests/powerpc/ptrace/ptrace-gpr.h | 74 +
.../testing/selftests/powerpc/ptrace/ptrace-tar.c | 159 ++
.../testing/selftests/powerpc/ptrace/ptrace-tar.h | 50 +
.../selftests/powerpc/ptrace/ptrace-tm-gpr.c | 299 ++++
.../selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c | 327 ++++
.../selftests/powerpc/ptrace/ptrace-tm-spd-tar.c | 195 +++
.../selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c | 222 +++
.../selftests/powerpc/ptrace/ptrace-tm-spr.c | 186 +++
.../selftests/powerpc/ptrace/ptrace-tm-tar.c | 182 ++
.../selftests/powerpc/ptrace/ptrace-tm-vsx.c | 209 +++
.../testing/selftests/powerpc/ptrace/ptrace-vsx.c | 143 ++
.../testing/selftests/powerpc/ptrace/ptrace-vsx.h | 121 ++
tools/testing/selftests/powerpc/ptrace/ptrace.S | 396 +++++
tools/testing/selftests/powerpc/ptrace/ptrace.h | 783 +++++++++
tools/testing/selftests/powerpc/reg.h | 42 +-
28 files changed, 5566 insertions(+), 137 deletions(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/.gitignore
create mode 100644 tools/testing/selftests/powerpc/ptrace/Makefile
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-ebb.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-ebb.h
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-gpr.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-gpr.h
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tar.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tar.h
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-gpr.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-tar.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-spr.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-tar.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-vsx.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-vsx.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-vsx.h
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace.S
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace.h
--
1.8.3.1
^ permalink raw reply [flat|nested] 34+ messages in thread
* [PATCH v13 01/30] elf: Add powerpc specific core note sections
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 02/30] powerpc/process: Add the function flush_tmregs_to_thread wei.guo.simon
` (28 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch adds twelve ELF core note sections for powerpc
architecture for various registers and register sets which
need to be accessed from ptrace interface and then gdb.
These additions include special purpose registers like TAR,
PPR, DSCR, TM running and checkpointed state for various
register sets, EBB related register set, performance monitor
register set etc. Addition of these new ELF core note
sections extends the existing ELF ABI on powerpc arch without
affecting it in any manner.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
include/uapi/linux/elf.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
index cb4a72f..1be3c5f 100644
--- a/include/uapi/linux/elf.h
+++ b/include/uapi/linux/elf.h
@@ -381,6 +381,19 @@ typedef struct elf64_shdr {
#define NT_PPC_VMX 0x100 /* PowerPC Altivec/VMX registers */
#define NT_PPC_SPE 0x101 /* PowerPC SPE/EVR registers */
#define NT_PPC_VSX 0x102 /* PowerPC VSX registers */
+#define NT_PPC_TAR 0x103 /* Target Address Register */
+#define NT_PPC_PPR 0x104 /* Program Priority Register */
+#define NT_PPC_DSCR 0x105 /* Data Stream Control Register */
+#define NT_PPC_EBB 0x106 /* Event Based Branch Registers */
+#define NT_PPC_PMU 0x107 /* Performance Monitor Registers */
+#define NT_PPC_TM_CGPR 0x108 /* TM checkpointed GPR Registers */
+#define NT_PPC_TM_CFPR 0x109 /* TM checkpointed FPR Registers */
+#define NT_PPC_TM_CVMX 0x10a /* TM checkpointed VMX Registers */
+#define NT_PPC_TM_CVSX 0x10b /* TM checkpointed VSX Registers */
+#define NT_PPC_TM_SPR 0x10c /* TM Special Purpose Registers */
+#define NT_PPC_TM_CTAR 0x10d /* TM checkpointed Target Address Register */
+#define NT_PPC_TM_CPPR 0x10e /* TM checkpointed Program Priority Register */
+#define NT_PPC_TM_CDSCR 0x10f /* TM checkpointed Data Stream Control Register */
#define NT_386_TLS 0x200 /* i386 TLS slots (struct user_desc) */
#define NT_386_IOPERM 0x201 /* x86 io permission bitmap (1=deny) */
#define NT_X86_XSTATE 0x202 /* x86 extended state using xsave */
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 02/30] powerpc/process: Add the function flush_tmregs_to_thread
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 01/30] elf: Add powerpc specific core note sections wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 03/30] powerpc/ptrace: Enable in transaction NT_PRFPREG ptrace requests wei.guo.simon
` (27 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch creates a function flush_tmregs_to_thread which
will then be used by subsequent patches in this series. The
function checks for self tracing ptrace interface attempts
while in the TM context and logs appropriate warning message.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
arch/powerpc/include/asm/switch_to.h | 8 ++++++++
arch/powerpc/kernel/process.c | 20 ++++++++++++++++++++
2 files changed, 28 insertions(+)
diff --git a/arch/powerpc/include/asm/switch_to.h b/arch/powerpc/include/asm/switch_to.h
index 17c8380..0a74ebe 100644
--- a/arch/powerpc/include/asm/switch_to.h
+++ b/arch/powerpc/include/asm/switch_to.h
@@ -75,6 +75,14 @@ static inline void disable_kernel_spe(void)
static inline void __giveup_spe(struct task_struct *t) { }
#endif
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+extern void flush_tmregs_to_thread(struct task_struct *);
+#else
+static inline void flush_tmregs_to_thread(struct task_struct *t)
+{
+}
+#endif
+
static inline void clear_task_ebb(struct task_struct *t)
{
#ifdef CONFIG_PPC_BOOK3S_64
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 0b93893..e9f7f52 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1051,6 +1051,26 @@ static inline void restore_sprs(struct thread_struct *old_thread,
#endif
}
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+void flush_tmregs_to_thread(struct task_struct *tsk)
+{
+ /*
+ * Process self tracing is not yet supported through
+ * ptrace interface. Ptrace generic code should have
+ * prevented this from happening in the first place.
+ * Warn once here with the message, if some how it
+ * is attempted.
+ */
+ WARN_ONCE(tsk == current,
+ "Not expecting ptrace on self: TM regs may be incorrect\n");
+
+ /*
+ * If task is not current, it should have been flushed
+ * already to it's thread_struct during __switch_to().
+ */
+}
+#endif
+
struct task_struct *__switch_to(struct task_struct *prev,
struct task_struct *new)
{
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 03/30] powerpc/ptrace: Enable in transaction NT_PRFPREG ptrace requests
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 01/30] elf: Add powerpc specific core note sections wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 02/30] powerpc/process: Add the function flush_tmregs_to_thread wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 04/30] powerpc/ptrace: Enable in transaction NT_PPC_VMX " wei.guo.simon
` (26 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch enables in transaction NT_PRFPREG ptrace requests.
The function fpr_get which gets the running value of all FPR
registers and the function fpr_set which sets the running
value of of all FPR registers work on the running set of FPR
registers whose location will be different if transaction is
active. This patch makes these functions adapt to situations
when the transaction is active.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
arch/powerpc/kernel/ptrace.c | 93 ++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 89 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 060b140..82db082 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -358,6 +358,29 @@ static int gpr_set(struct task_struct *target, const struct user_regset *regset,
return ret;
}
+/*
+ * When the transaction is active, 'transact_fp' holds the current running
+ * value of all FPR registers and 'fp_state' holds the last checkpointed
+ * value of all FPR registers for the current transaction. When transaction
+ * is not active 'fp_state' holds the current running state of all the FPR
+ * registers. So this function which returns the current running values of
+ * all the FPR registers, needs to know whether any transaction is active
+ * or not.
+ *
+ * Userspace interface buffer layout:
+ *
+ * struct data {
+ * u64 fpr[32];
+ * u64 fpscr;
+ * };
+ *
+ * There are two config options CONFIG_VSX and CONFIG_PPC_TRANSACTIONAL_MEM
+ * which determines the final code in this function. All the combinations of
+ * these two config options are possible except the one below as transactional
+ * memory config pulls in CONFIG_VSX automatically.
+ *
+ * !defined(CONFIG_VSX) && defined(CONFIG_PPC_TRANSACTIONAL_MEM)
+ */
static int fpr_get(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
@@ -368,14 +391,31 @@ static int fpr_get(struct task_struct *target, const struct user_regset *regset,
#endif
flush_fp_to_thread(target);
-#ifdef CONFIG_VSX
+#if defined(CONFIG_VSX) && defined(CONFIG_PPC_TRANSACTIONAL_MEM)
+ /* copy to local buffer then write that out */
+ if (MSR_TM_ACTIVE(target->thread.regs->msr)) {
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+ for (i = 0; i < 32 ; i++)
+ buf[i] = target->thread.TS_TRANS_FPR(i);
+ buf[32] = target->thread.transact_fp.fpscr;
+ } else {
+ for (i = 0; i < 32 ; i++)
+ buf[i] = target->thread.TS_FPR(i);
+ buf[32] = target->thread.fp_state.fpscr;
+ }
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
+#endif
+
+#if defined(CONFIG_VSX) && !defined(CONFIG_PPC_TRANSACTIONAL_MEM)
/* copy to local buffer then write that out */
for (i = 0; i < 32 ; i++)
buf[i] = target->thread.TS_FPR(i);
buf[32] = target->thread.fp_state.fpscr;
return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
+#endif
-#else
+#if !defined(CONFIG_VSX) && !defined(CONFIG_PPC_TRANSACTIONAL_MEM)
BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
offsetof(struct thread_fp_state, fpr[32]));
@@ -384,6 +424,29 @@ static int fpr_get(struct task_struct *target, const struct user_regset *regset,
#endif
}
+/*
+ * When the transaction is active, 'transact_fp' holds the current running
+ * value of all FPR registers and 'fp_state' holds the last checkpointed
+ * value of all FPR registers for the current transaction. When transaction
+ * is not active 'fp_state' holds the current running state of all the FPR
+ * registers. So this function which setss the current running values of
+ * all the FPR registers, needs to know whether any transaction is active
+ * or not.
+ *
+ * Userspace interface buffer layout:
+ *
+ * struct data {
+ * u64 fpr[32];
+ * u64 fpscr;
+ * };
+ *
+ * There are two config options CONFIG_VSX and CONFIG_PPC_TRANSACTIONAL_MEM
+ * which determines the final code in this function. All the combinations of
+ * these two config options are possible except the one below as transactional
+ * memory config pulls in CONFIG_VSX automatically.
+ *
+ * !defined(CONFIG_VSX) && defined(CONFIG_PPC_TRANSACTIONAL_MEM)
+ */
static int fpr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
@@ -394,7 +457,27 @@ static int fpr_set(struct task_struct *target, const struct user_regset *regset,
#endif
flush_fp_to_thread(target);
-#ifdef CONFIG_VSX
+#if defined(CONFIG_VSX) && defined(CONFIG_PPC_TRANSACTIONAL_MEM)
+ /* copy to local buffer then write that out */
+ i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
+ if (i)
+ return i;
+
+ if (MSR_TM_ACTIVE(target->thread.regs->msr)) {
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+ for (i = 0; i < 32 ; i++)
+ target->thread.TS_TRANS_FPR(i) = buf[i];
+ target->thread.transact_fp.fpscr = buf[32];
+ } else {
+ for (i = 0; i < 32 ; i++)
+ target->thread.TS_FPR(i) = buf[i];
+ target->thread.fp_state.fpscr = buf[32];
+ }
+ return 0;
+#endif
+
+#if defined(CONFIG_VSX) && !defined(CONFIG_PPC_TRANSACTIONAL_MEM)
/* copy to local buffer then write that out */
i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
if (i)
@@ -403,7 +486,9 @@ static int fpr_set(struct task_struct *target, const struct user_regset *regset,
target->thread.TS_FPR(i) = buf[i];
target->thread.fp_state.fpscr = buf[32];
return 0;
-#else
+#endif
+
+#if !defined(CONFIG_VSX) && !defined(CONFIG_PPC_TRANSACTIONAL_MEM)
BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
offsetof(struct thread_fp_state, fpr[32]));
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 04/30] powerpc/ptrace: Enable in transaction NT_PPC_VMX ptrace requests
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (2 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 03/30] powerpc/ptrace: Enable in transaction NT_PRFPREG ptrace requests wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 05/30] powerpc/ptrace: Enable in transaction NT_PPC_VSX " wei.guo.simon
` (25 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch enables in transaction NT_PPC_VMX ptrace requests. The
function vr_get which gets the running value of all VMX registers
and the function vr_set which sets the running value of of all VMX
registers work on the running set of VMX registers whose location
will be different if transaction is active. This patch makes these
functions adapt to situations when the transaction is active.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
arch/powerpc/kernel/ptrace.c | 90 ++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 87 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 82db082..3baa57e 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -518,10 +518,28 @@ static int vr_active(struct task_struct *target,
return target->thread.used_vr ? regset->n : 0;
}
+/*
+ * When the transaction is active, 'transact_vr' holds the current running
+ * value of all the VMX registers and 'vr_state' holds the last checkpointed
+ * value of all the VMX registers for the current transaction to fall back
+ * on in case it aborts. When transaction is not active 'vr_state' holds
+ * the current running state of all the VMX registers. So this function which
+ * gets the current running values of all the VMX registers, needs to know
+ * whether any transaction is active or not.
+ *
+ * Userspace interface buffer layout:
+ *
+ * struct data {
+ * vector128 vr[32];
+ * vector128 vscr;
+ * vector128 vrsave;
+ * };
+ */
static int vr_get(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
+ struct thread_vr_state *addr;
int ret;
flush_altivec_to_thread(target);
@@ -529,8 +547,19 @@ static int vr_get(struct task_struct *target, const struct user_regset *regset,
BUILD_BUG_ON(offsetof(struct thread_vr_state, vscr) !=
offsetof(struct thread_vr_state, vr[32]));
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (MSR_TM_ACTIVE(target->thread.regs->msr)) {
+ flush_fp_to_thread(target);
+ flush_tmregs_to_thread(target);
+ addr = &target->thread.transact_vr;
+ } else {
+ addr = &target->thread.vr_state;
+ }
+#else
+ addr = &target->thread.vr_state;
+#endif
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.vr_state, 0,
+ addr, 0,
33 * sizeof(vector128));
if (!ret) {
/*
@@ -541,7 +570,16 @@ static int vr_get(struct task_struct *target, const struct user_regset *regset,
u32 word;
} vrsave;
memset(&vrsave, 0, sizeof(vrsave));
+
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (MSR_TM_ACTIVE(target->thread.regs->msr))
+ vrsave.word = target->thread.transact_vrsave;
+ else
+ vrsave.word = target->thread.vrsave;
+#else
vrsave.word = target->thread.vrsave;
+#endif
+
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave,
33 * sizeof(vector128), -1);
}
@@ -549,10 +587,28 @@ static int vr_get(struct task_struct *target, const struct user_regset *regset,
return ret;
}
+/*
+ * When the transaction is active, 'transact_vr' holds the current running
+ * value of all the VMX registers and 'vr_state' holds the last checkpointed
+ * value of all the VMX registers for the current transaction to fall back
+ * on in case it aborts. When transaction is not active 'vr_state' holds
+ * the current running state of all the VMX registers. So this function which
+ * sets the current running values of all the VMX registers, needs to know
+ * whether any transaction is active or not.
+ *
+ * Userspace interface buffer layout:
+ *
+ * struct data {
+ * vector128 vr[32];
+ * vector128 vscr;
+ * vector128 vrsave;
+ * };
+ */
static int vr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
+ struct thread_vr_state *addr;
int ret;
flush_altivec_to_thread(target);
@@ -560,8 +616,19 @@ static int vr_set(struct task_struct *target, const struct user_regset *regset,
BUILD_BUG_ON(offsetof(struct thread_vr_state, vscr) !=
offsetof(struct thread_vr_state, vr[32]));
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (MSR_TM_ACTIVE(target->thread.regs->msr)) {
+ flush_fp_to_thread(target);
+ flush_tmregs_to_thread(target);
+ addr = &target->thread.transact_vr;
+ } else {
+ addr = &target->thread.vr_state;
+ }
+#else
+ addr = &target->thread.vr_state;
+#endif
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.vr_state, 0,
+ addr, 0,
33 * sizeof(vector128));
if (!ret && count > 0) {
/*
@@ -572,11 +639,28 @@ static int vr_set(struct task_struct *target, const struct user_regset *regset,
u32 word;
} vrsave;
memset(&vrsave, 0, sizeof(vrsave));
+
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (MSR_TM_ACTIVE(target->thread.regs->msr))
+ vrsave.word = target->thread.transact_vrsave;
+ else
+ vrsave.word = target->thread.vrsave;
+#else
vrsave.word = target->thread.vrsave;
+#endif
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &vrsave,
33 * sizeof(vector128), -1);
- if (!ret)
+ if (!ret) {
+
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (MSR_TM_ACTIVE(target->thread.regs->msr))
+ target->thread.transact_vrsave = vrsave.word;
+ else
+ target->thread.vrsave = vrsave.word;
+#else
target->thread.vrsave = vrsave.word;
+#endif
+ }
}
return ret;
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 05/30] powerpc/ptrace: Enable in transaction NT_PPC_VSX ptrace requests
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (3 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 04/30] powerpc/ptrace: Enable in transaction NT_PPC_VMX " wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 06/30] powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction wei.guo.simon
` (24 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch enables in transaction NT_PPC_VSX ptrace requests. The
function vsr_get which gets the running value of all VSX registers
and the function vsr_set which sets the running value of of all VSX
registers work on the running set of VMX registers whose location
will be different if transaction is active. This patch makes these
functions adapt to situations when the transaction is active.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
arch/powerpc/kernel/ptrace.c | 64 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 64 insertions(+)
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 3baa57e..ebf3b0e 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -681,6 +681,21 @@ static int vsr_active(struct task_struct *target,
return target->thread.used_vsr ? regset->n : 0;
}
+/*
+ * When the transaction is active, 'transact_fp' holds the current running
+ * value of all FPR registers and 'fp_state' holds the last checkpointed
+ * value of all FPR registers for the current transaction. When transaction
+ * is not active 'fp_state' holds the current running state of all the FPR
+ * registers. So this function which returns the current running values of
+ * all the FPR registers, needs to know whether any transaction is active
+ * or not.
+ *
+ * Userspace interface buffer layout:
+ *
+ * struct data {
+ * u64 vsx[32];
+ * };
+ */
static int vsr_get(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
@@ -688,16 +703,47 @@ static int vsr_get(struct task_struct *target, const struct user_regset *regset,
u64 buf[32];
int ret, i;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+#endif
flush_vsx_to_thread(target);
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (MSR_TM_ACTIVE(target->thread.regs->msr)) {
+ for (i = 0; i < 32 ; i++)
+ buf[i] = target->thread.
+ transact_fp.fpr[i][TS_VSRLOWOFFSET];
+ } else {
+ for (i = 0; i < 32 ; i++)
+ buf[i] = target->thread.
+ fp_state.fpr[i][TS_VSRLOWOFFSET];
+ }
+#else
for (i = 0; i < 32 ; i++)
buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
+#endif
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
buf, 0, 32 * sizeof(double));
return ret;
}
+/*
+ * When the transaction is active, 'transact_fp' holds the current running
+ * value of all FPR registers and 'fp_state' holds the last checkpointed
+ * value of all FPR registers for the current transaction. When transaction
+ * is not active 'fp_state' holds the current running state of all the FPR
+ * registers. So this function which sets the current running values of all
+ * the FPR registers, needs to know whether any transaction is active or not.
+ *
+ * Userspace interface buffer layout:
+ *
+ * struct data {
+ * u64 vsx[32];
+ * };
+ */
static int vsr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
@@ -705,12 +751,30 @@ static int vsr_set(struct task_struct *target, const struct user_regset *regset,
u64 buf[32];
int ret,i;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+#endif
flush_vsx_to_thread(target);
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
buf, 0, 32 * sizeof(double));
+
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (MSR_TM_ACTIVE(target->thread.regs->msr)) {
+ for (i = 0; i < 32 ; i++)
+ target->thread.transact_fp.
+ fpr[i][TS_VSRLOWOFFSET] = buf[i];
+ } else {
+ for (i = 0; i < 32 ; i++)
+ target->thread.fp_state.
+ fpr[i][TS_VSRLOWOFFSET] = buf[i];
+ }
+#else
for (i = 0; i < 32 ; i++)
target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
+#endif
return ret;
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 06/30] powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (4 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 05/30] powerpc/ptrace: Enable in transaction NT_PPC_VSX " wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-08-04 6:36 ` Daniel Axtens
2016-07-28 2:57 ` [PATCH v13 07/30] powerpc/ptrace: Enable support for NT_PPC_CGPR wei.guo.simon
` (23 subsequent siblings)
29 siblings, 1 reply; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch splits gpr32_get, gpr32_set functions to accommodate
in transaction ptrace requests implemented in patches later in
the series.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
arch/powerpc/kernel/ptrace.c | 64 +++++++++++++++++++++++++++++++++++---------
1 file changed, 51 insertions(+), 13 deletions(-)
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index ebf3b0e..2cdb4e7 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -907,24 +907,35 @@ static const struct user_regset_view user_ppc_native_view = {
#ifdef CONFIG_PPC64
#include <linux/compat.h>
-static int gpr32_get(struct task_struct *target,
+static int gpr32_get_common(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ void *kbuf, void __user *ubuf, bool tm_active)
{
const unsigned long *regs = &target->thread.regs->gpr[0];
+ const unsigned long *ckpt_regs;
compat_ulong_t *k = kbuf;
compat_ulong_t __user *u = ubuf;
compat_ulong_t reg;
int i;
- if (target->thread.regs == NULL)
- return -EIO;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ ckpt_regs = &target->thread.ckpt_regs.gpr[0];
+#endif
+ if (tm_active) {
+ regs = ckpt_regs;
+ } else {
+ if (target->thread.regs == NULL)
+ return -EIO;
- if (!FULL_REGS(target->thread.regs)) {
- /* We have a partial register set. Fill 14-31 with bogus values */
- for (i = 14; i < 32; i++)
- target->thread.regs->gpr[i] = NV_REG_POISON;
+ if (!FULL_REGS(target->thread.regs)) {
+ /*
+ * We have a partial register set.
+ * Fill 14-31 with bogus values.
+ */
+ for (i = 14; i < 32; i++)
+ target->thread.regs->gpr[i] = NV_REG_POISON;
+ }
}
pos /= sizeof(reg);
@@ -964,20 +975,31 @@ static int gpr32_get(struct task_struct *target,
PT_REGS_COUNT * sizeof(reg), -1);
}
-static int gpr32_set(struct task_struct *target,
+static int gpr32_set_common(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
+ const void *kbuf, const void __user *ubuf, bool tm_active)
{
unsigned long *regs = &target->thread.regs->gpr[0];
+ unsigned long *ckpt_regs;
const compat_ulong_t *k = kbuf;
const compat_ulong_t __user *u = ubuf;
compat_ulong_t reg;
- if (target->thread.regs == NULL)
- return -EIO;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ ckpt_regs = &target->thread.ckpt_regs.gpr[0];
+#endif
- CHECK_FULL_REGS(target->thread.regs);
+ if (tm_active) {
+ regs = ckpt_regs;
+ } else {
+ regs = &target->thread.regs->gpr[0];
+
+ if (target->thread.regs == NULL)
+ return -EIO;
+
+ CHECK_FULL_REGS(target->thread.regs);
+ }
pos /= sizeof(reg);
count /= sizeof(reg);
@@ -1037,6 +1059,22 @@ static int gpr32_set(struct task_struct *target,
(PT_TRAP + 1) * sizeof(reg), -1);
}
+static int gpr32_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ return gpr32_get_common(target, regset, pos, count, kbuf, ubuf, 0);
+}
+
+static int gpr32_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ return gpr32_set_common(target, regset, pos, count, kbuf, ubuf, 0);
+}
+
/*
* These are the regset flavors matching the CONFIG_PPC32 native set.
*/
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 07/30] powerpc/ptrace: Enable support for NT_PPC_CGPR
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (5 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 06/30] powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 08/30] powerpc/ptrace: Enable support for NT_PPC_CFPR wei.guo.simon
` (22 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch enables support for TM checkpointed GPR register
set ELF core note NT_PPC_CGPR based ptrace requests through
PTRACE_GETREGSET, PTRACE_SETREGSET calls. This is achieved
through adding a register set REGSET_CGPR in powerpc
corresponding to the ELF core note section added. It
implements the get, set and active functions for this new
register set added.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
arch/powerpc/kernel/ptrace.c | 222 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 222 insertions(+)
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 2cdb4e7..d42c79a 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -181,6 +181,26 @@ static int set_user_msr(struct task_struct *task, unsigned long msr)
return 0;
}
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+static unsigned long get_user_ckpt_msr(struct task_struct *task)
+{
+ return task->thread.ckpt_regs.msr | task->thread.fpexc_mode;
+}
+
+static int set_user_ckpt_msr(struct task_struct *task, unsigned long msr)
+{
+ task->thread.ckpt_regs.msr &= ~MSR_DEBUGCHANGE;
+ task->thread.ckpt_regs.msr |= msr & MSR_DEBUGCHANGE;
+ return 0;
+}
+
+static int set_user_ckpt_trap(struct task_struct *task, unsigned long trap)
+{
+ task->thread.ckpt_regs.trap = trap & 0xfff0;
+ return 0;
+}
+#endif
+
#ifdef CONFIG_PPC64
static int get_user_dscr(struct task_struct *task, unsigned long *data)
{
@@ -847,6 +867,172 @@ static int evr_set(struct task_struct *target, const struct user_regset *regset,
}
#endif /* CONFIG_SPE */
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+/**
+ * tm_cgpr_active - get active number of registers in CGPR
+ * @target: The target task.
+ * @regset: The user regset structure.
+ *
+ * This function checks for the active number of available
+ * regisers in transaction checkpointed GPR category.
+ */
+static int tm_cgpr_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return 0;
+
+ return regset->n;
+}
+
+/**
+ * tm_cgpr_get - get CGPR registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy from.
+ * @ubuf: User buffer to copy into.
+ *
+ * This function gets transaction checkpointed GPR registers.
+ *
+ * When the transaction is active, 'ckpt_regs' holds all the checkpointed
+ * GPR register values for the current transaction to fall back on if it
+ * aborts in between. This function gets those checkpointed GPR registers.
+ * The userspace interface buffer layout is as follows.
+ *
+ * struct data {
+ * struct pt_regs ckpt_regs;
+ * };
+ */
+static int tm_cgpr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ckpt_regs,
+ 0, offsetof(struct pt_regs, msr));
+ if (!ret) {
+ unsigned long msr = get_user_ckpt_msr(target);
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &msr,
+ offsetof(struct pt_regs, msr),
+ offsetof(struct pt_regs, msr) +
+ sizeof(msr));
+ }
+
+ BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
+ offsetof(struct pt_regs, msr) + sizeof(long));
+
+ if (!ret)
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ckpt_regs.orig_gpr3,
+ offsetof(struct pt_regs, orig_gpr3),
+ sizeof(struct pt_regs));
+ if (!ret)
+ ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
+ sizeof(struct pt_regs), -1);
+
+ return ret;
+}
+
+/*
+ * tm_cgpr_set - set the CGPR registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy into.
+ * @ubuf: User buffer to copy from.
+ *
+ * This function sets in transaction checkpointed GPR registers.
+ *
+ * When the transaction is active, 'ckpt_regs' holds the checkpointed
+ * GPR register values for the current transaction to fall back on if it
+ * aborts in between. This function sets those checkpointed GPR registers.
+ * The userspace interface buffer layout is as follows.
+ *
+ * struct data {
+ * struct pt_regs ckpt_regs;
+ * };
+ */
+static int tm_cgpr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ unsigned long reg;
+ int ret;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ckpt_regs,
+ 0, PT_MSR * sizeof(reg));
+
+ if (!ret && count > 0) {
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®,
+ PT_MSR * sizeof(reg),
+ (PT_MSR + 1) * sizeof(reg));
+ if (!ret)
+ ret = set_user_ckpt_msr(target, reg);
+ }
+
+ BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
+ offsetof(struct pt_regs, msr) + sizeof(long));
+
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ckpt_regs.orig_gpr3,
+ PT_ORIG_R3 * sizeof(reg),
+ (PT_MAX_PUT_REG + 1) * sizeof(reg));
+
+ if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
+ ret = user_regset_copyin_ignore(
+ &pos, &count, &kbuf, &ubuf,
+ (PT_MAX_PUT_REG + 1) * sizeof(reg),
+ PT_TRAP * sizeof(reg));
+
+ if (!ret && count > 0) {
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®,
+ PT_TRAP * sizeof(reg),
+ (PT_TRAP + 1) * sizeof(reg));
+ if (!ret)
+ ret = set_user_ckpt_trap(target, reg);
+ }
+
+ if (!ret)
+ ret = user_regset_copyin_ignore(
+ &pos, &count, &kbuf, &ubuf,
+ (PT_TRAP + 1) * sizeof(reg), -1);
+
+ return ret;
+}
+#endif
/*
* These are our native regset flavors.
@@ -863,6 +1049,9 @@ enum powerpc_regset {
#ifdef CONFIG_SPE
REGSET_SPE,
#endif
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ REGSET_TM_CGPR, /* TM checkpointed GPR registers */
+#endif
};
static const struct user_regset native_regsets[] = {
@@ -897,6 +1086,13 @@ static const struct user_regset native_regsets[] = {
.active = evr_active, .get = evr_get, .set = evr_set
},
#endif
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ [REGSET_TM_CGPR] = {
+ .core_note_type = NT_PPC_TM_CGPR, .n = ELF_NGREG,
+ .size = sizeof(long), .align = sizeof(long),
+ .active = tm_cgpr_active, .get = tm_cgpr_get, .set = tm_cgpr_set
+ },
+#endif
};
static const struct user_regset_view user_ppc_native_view = {
@@ -1059,6 +1255,24 @@ static int gpr32_set_common(struct task_struct *target,
(PT_TRAP + 1) * sizeof(reg), -1);
}
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+static int tm_cgpr32_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ return gpr32_get_common(target, regset, pos, count, kbuf, ubuf, 1);
+}
+
+static int tm_cgpr32_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ return gpr32_set_common(target, regset, pos, count, kbuf, ubuf, 1);
+}
+#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
+
static int gpr32_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
@@ -1103,6 +1317,14 @@ static const struct user_regset compat_regsets[] = {
.active = evr_active, .get = evr_get, .set = evr_set
},
#endif
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ [REGSET_TM_CGPR] = {
+ .core_note_type = NT_PPC_TM_CGPR, .n = ELF_NGREG,
+ .size = sizeof(long), .align = sizeof(long),
+ .active = tm_cgpr_active,
+ .get = tm_cgpr32_get, .set = tm_cgpr32_set
+ },
+#endif
};
static const struct user_regset_view user_ppc_compat_view = {
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 08/30] powerpc/ptrace: Enable support for NT_PPC_CFPR
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (6 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 07/30] powerpc/ptrace: Enable support for NT_PPC_CGPR wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 09/30] powerpc/ptrace: Enable support for NT_PPC_CVMX wei.guo.simon
` (21 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch enables support for TM checkpointed FPR register
set ELF core note NT_PPC_CFPR based ptrace requests through
PTRACE_GETREGSET, PTRACE_SETREGSET calls. This is achieved
through adding a register set REGSET_CFPR in powerpc
corresponding to the ELF core note section added. It
implements the get, set and active functions for this new
register set added.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
arch/powerpc/kernel/ptrace.c | 126 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 126 insertions(+)
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index d42c79a..cd10022 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -1032,6 +1032,121 @@ static int tm_cgpr_set(struct task_struct *target,
return ret;
}
+
+/**
+ * tm_cfpr_active - get active number of registers in CFPR
+ * @target: The target task.
+ * @regset: The user regset structure.
+ *
+ * This function checks for the active number of available
+ * regisers in transaction checkpointed FPR category.
+ */
+static int tm_cfpr_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return 0;
+
+ return regset->n;
+}
+
+/**
+ * tm_cfpr_get - get CFPR registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy from.
+ * @ubuf: User buffer to copy into.
+ *
+ * This function gets in transaction checkpointed FPR registers.
+ *
+ * When the transaction is active 'fp_state' holds the checkpointed
+ * values for the current transaction to fall back on if it aborts
+ * in between. This function gets those checkpointed FPR registers.
+ * The userspace interface buffer layout is as follows.
+ *
+ * struct data {
+ * u64 fpr[32];
+ * u64 fpscr;
+ *};
+ */
+static int tm_cfpr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ u64 buf[33];
+ int i;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ /* copy to local buffer then write that out */
+ for (i = 0; i < 32 ; i++)
+ buf[i] = target->thread.TS_FPR(i);
+ buf[32] = target->thread.fp_state.fpscr;
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
+}
+
+/**
+ * tm_cfpr_set - set CFPR registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy into.
+ * @ubuf: User buffer to copy from.
+ *
+ * This function sets in transaction checkpointed FPR registers.
+ *
+ * When the transaction is active 'fp_state' holds the checkpointed
+ * FPR register values for the current transaction to fall back on
+ * if it aborts in between. This function sets these checkpointed
+ * FPR registers. The userspace interface buffer layout is as follows.
+ *
+ * struct data {
+ * u64 fpr[32];
+ * u64 fpscr;
+ *};
+ */
+static int tm_cfpr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ u64 buf[33];
+ int i;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ /* copy to local buffer then write that out */
+ i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
+ if (i)
+ return i;
+ for (i = 0; i < 32 ; i++)
+ target->thread.TS_FPR(i) = buf[i];
+ target->thread.fp_state.fpscr = buf[32];
+ return 0;
+}
#endif
/*
@@ -1051,6 +1166,7 @@ enum powerpc_regset {
#endif
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
REGSET_TM_CGPR, /* TM checkpointed GPR registers */
+ REGSET_TM_CFPR, /* TM checkpointed FPR registers */
#endif
};
@@ -1092,6 +1208,11 @@ static const struct user_regset native_regsets[] = {
.size = sizeof(long), .align = sizeof(long),
.active = tm_cgpr_active, .get = tm_cgpr_get, .set = tm_cgpr_set
},
+ [REGSET_TM_CFPR] = {
+ .core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
+ .size = sizeof(double), .align = sizeof(double),
+ .active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
+ },
#endif
};
@@ -1324,6 +1445,11 @@ static const struct user_regset compat_regsets[] = {
.active = tm_cgpr_active,
.get = tm_cgpr32_get, .set = tm_cgpr32_set
},
+ [REGSET_TM_CFPR] = {
+ .core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
+ .size = sizeof(double), .align = sizeof(double),
+ .active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
+ },
#endif
};
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 09/30] powerpc/ptrace: Enable support for NT_PPC_CVMX
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (7 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 08/30] powerpc/ptrace: Enable support for NT_PPC_CFPR wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 10/30] powerpc/ptrace: Enable support for NT_PPC_CVSX wei.guo.simon
` (20 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch enables support for TM checkpointed VMX register
set ELF core note NT_PPC_CVMX based ptrace requests through
PTRACE_GETREGSET, PTRACE_SETREGSET calls. This is achieved
through adding a register set REGSET_CVMX in powerpc
corresponding to the ELF core note section added. It
implements the get, set and active functions for this new
register set added.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
arch/powerpc/include/uapi/asm/elf.h | 1 +
arch/powerpc/kernel/ptrace.c | 158 ++++++++++++++++++++++++++++++++++++
2 files changed, 159 insertions(+)
diff --git a/arch/powerpc/include/uapi/asm/elf.h b/arch/powerpc/include/uapi/asm/elf.h
index c2d21d1..ecb4e84 100644
--- a/arch/powerpc/include/uapi/asm/elf.h
+++ b/arch/powerpc/include/uapi/asm/elf.h
@@ -91,6 +91,7 @@
#define ELF_NGREG 48 /* includes nip, msr, lr, etc. */
#define ELF_NFPREG 33 /* includes fpscr */
+#define ELF_NVMX 34 /* includes all vector registers */
typedef unsigned long elf_greg_t64;
typedef elf_greg_t64 elf_gregset_t64[ELF_NGREG];
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index cd10022..836a4b4 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -64,6 +64,8 @@ struct pt_regs_offset {
{.name = STR(gpr##num), .offset = offsetof(struct pt_regs, gpr[num])}
#define REG_OFFSET_END {.name = NULL, .offset = 0}
+#define TVSO(f) (offsetof(struct thread_vr_state, f))
+
static const struct pt_regs_offset regoffset_table[] = {
GPR_OFFSET_NAME(0),
GPR_OFFSET_NAME(1),
@@ -1147,6 +1149,151 @@ static int tm_cfpr_set(struct task_struct *target,
target->thread.fp_state.fpscr = buf[32];
return 0;
}
+
+/**
+ * tm_cvmx_active - get active number of registers in CVMX
+ * @target: The target task.
+ * @regset: The user regset structure.
+ *
+ * This function checks for the active number of available
+ * regisers in checkpointed VMX category.
+ */
+static int tm_cvmx_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return 0;
+
+ return regset->n;
+}
+
+/**
+ * tm_cvmx_get - get CMVX registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy from.
+ * @ubuf: User buffer to copy into.
+ *
+ * This function gets in transaction checkpointed VMX registers.
+ *
+ * When the transaction is active 'vr_state' and 'vr_save' hold
+ * the checkpointed values for the current transaction to fall
+ * back on if it aborts in between. The userspace interface buffer
+ * layout is as follows.
+ *
+ * struct data {
+ * vector128 vr[32];
+ * vector128 vscr;
+ * vector128 vrsave;
+ *};
+ */
+static int tm_cvmx_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ BUILD_BUG_ON(TVSO(vscr) != TVSO(vr[32]));
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ /* Flush the state */
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.vr_state, 0,
+ 33 * sizeof(vector128));
+ if (!ret) {
+ /*
+ * Copy out only the low-order word of vrsave.
+ */
+ union {
+ elf_vrreg_t reg;
+ u32 word;
+ } vrsave;
+ memset(&vrsave, 0, sizeof(vrsave));
+ vrsave.word = target->thread.vrsave;
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave,
+ 33 * sizeof(vector128), -1);
+ }
+
+ return ret;
+}
+
+/**
+ * tm_cvmx_set - set CMVX registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy into.
+ * @ubuf: User buffer to copy from.
+ *
+ * This function sets in transaction checkpointed VMX registers.
+ *
+ * When the transaction is active 'vr_state' and 'vr_save' hold
+ * the checkpointed values for the current transaction to fall
+ * back on if it aborts in between. The userspace interface buffer
+ * layout is as follows.
+ *
+ * struct data {
+ * vector128 vr[32];
+ * vector128 vscr;
+ * vector128 vrsave;
+ *};
+ */
+static int tm_cvmx_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ BUILD_BUG_ON(TVSO(vscr) != TVSO(vr[32]));
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.vr_state, 0,
+ 33 * sizeof(vector128));
+ if (!ret && count > 0) {
+ /*
+ * We use only the low-order word of vrsave.
+ */
+ union {
+ elf_vrreg_t reg;
+ u32 word;
+ } vrsave;
+ memset(&vrsave, 0, sizeof(vrsave));
+ vrsave.word = target->thread.vrsave;
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &vrsave,
+ 33 * sizeof(vector128), -1);
+ if (!ret)
+ target->thread.vrsave = vrsave.word;
+ }
+
+ return ret;
+}
#endif
/*
@@ -1167,6 +1314,7 @@ enum powerpc_regset {
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
REGSET_TM_CGPR, /* TM checkpointed GPR registers */
REGSET_TM_CFPR, /* TM checkpointed FPR registers */
+ REGSET_TM_CVMX, /* TM checkpointed VMX registers */
#endif
};
@@ -1213,6 +1361,11 @@ static const struct user_regset native_regsets[] = {
.size = sizeof(double), .align = sizeof(double),
.active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
},
+ [REGSET_TM_CVMX] = {
+ .core_note_type = NT_PPC_TM_CVMX, .n = ELF_NVMX,
+ .size = sizeof(vector128), .align = sizeof(vector128),
+ .active = tm_cvmx_active, .get = tm_cvmx_get, .set = tm_cvmx_set
+ },
#endif
};
@@ -1450,6 +1603,11 @@ static const struct user_regset compat_regsets[] = {
.size = sizeof(double), .align = sizeof(double),
.active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
},
+ [REGSET_TM_CVMX] = {
+ .core_note_type = NT_PPC_TM_CVMX, .n = ELF_NVMX,
+ .size = sizeof(vector128), .align = sizeof(vector128),
+ .active = tm_cvmx_active, .get = tm_cvmx_get, .set = tm_cvmx_set
+ },
#endif
};
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 10/30] powerpc/ptrace: Enable support for NT_PPC_CVSX
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (8 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 09/30] powerpc/ptrace: Enable support for NT_PPC_CVMX wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 11/30] powerpc/ptrace: Enable support for TM SPR state wei.guo.simon
` (19 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch enables support for TM checkpointed VSX register
set ELF core note NT_PPC_CVSX based ptrace requests through
PTRACE_GETREGSET, PTRACE_SETREGSET calls. This is achieved
through adding a register set REGSET_CVSX in powerpc
corresponding to the ELF core note section added. It
implements the get, set and active functions for this new
register set added.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
arch/powerpc/include/uapi/asm/elf.h | 1 +
arch/powerpc/kernel/ptrace.c | 129 ++++++++++++++++++++++++++++++++++++
2 files changed, 130 insertions(+)
diff --git a/arch/powerpc/include/uapi/asm/elf.h b/arch/powerpc/include/uapi/asm/elf.h
index ecb4e84..1549172 100644
--- a/arch/powerpc/include/uapi/asm/elf.h
+++ b/arch/powerpc/include/uapi/asm/elf.h
@@ -92,6 +92,7 @@
#define ELF_NGREG 48 /* includes nip, msr, lr, etc. */
#define ELF_NFPREG 33 /* includes fpscr */
#define ELF_NVMX 34 /* includes all vector registers */
+#define ELF_NVSX 32 /* includes all VSX registers */
typedef unsigned long elf_greg_t64;
typedef elf_greg_t64 elf_gregset_t64[ELF_NGREG];
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 836a4b4..c8bf7e9 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -65,6 +65,7 @@ struct pt_regs_offset {
#define REG_OFFSET_END {.name = NULL, .offset = 0}
#define TVSO(f) (offsetof(struct thread_vr_state, f))
+#define TFSO(f) (offsetof(struct thread_fp_state, f))
static const struct pt_regs_offset regoffset_table[] = {
GPR_OFFSET_NAME(0),
@@ -1294,6 +1295,123 @@ static int tm_cvmx_set(struct task_struct *target,
return ret;
}
+
+/**
+ * tm_cvsx_active - get active number of registers in CVSX
+ * @target: The target task.
+ * @regset: The user regset structure.
+ *
+ * This function checks for the active number of available
+ * regisers in transaction checkpointed VSX category.
+ */
+static int tm_cvsx_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return 0;
+
+ flush_vsx_to_thread(target);
+ return target->thread.used_vsr ? regset->n : 0;
+}
+
+/**
+ * tm_cvsx_get - get CVSX registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy from.
+ * @ubuf: User buffer to copy into.
+ *
+ * This function gets in transaction checkpointed VSX registers.
+ *
+ * When the transaction is active 'fp_state' holds the checkpointed
+ * values for the current transaction to fall back on if it aborts
+ * in between. This function gets those checkpointed VSX registers.
+ * The userspace interface buffer layout is as follows.
+ *
+ * struct data {
+ * u64 vsx[32];
+ *};
+ */
+static int tm_cvsx_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ u64 buf[32];
+ int ret, i;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ /* Flush the state */
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+ flush_vsx_to_thread(target);
+
+ for (i = 0; i < 32 ; i++)
+ buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ buf, 0, 32 * sizeof(double));
+
+ return ret;
+}
+
+/**
+ * tm_cvsx_set - set CFPR registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy into.
+ * @ubuf: User buffer to copy from.
+ *
+ * This function sets in transaction checkpointed VSX registers.
+ *
+ * When the transaction is active 'fp_state' holds the checkpointed
+ * VSX register values for the current transaction to fall back on
+ * if it aborts in between. This function sets these checkpointed
+ * FPR registers. The userspace interface buffer layout is as follows.
+ *
+ * struct data {
+ * u64 vsx[32];
+ *};
+ */
+static int tm_cvsx_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ u64 buf[32];
+ int ret, i;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ /* Flush the state */
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+ flush_vsx_to_thread(target);
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ buf, 0, 32 * sizeof(double));
+ for (i = 0; i < 32 ; i++)
+ target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
+
+ return ret;
+}
#endif
/*
@@ -1315,6 +1433,7 @@ enum powerpc_regset {
REGSET_TM_CGPR, /* TM checkpointed GPR registers */
REGSET_TM_CFPR, /* TM checkpointed FPR registers */
REGSET_TM_CVMX, /* TM checkpointed VMX registers */
+ REGSET_TM_CVSX, /* TM checkpointed VSX registers */
#endif
};
@@ -1366,6 +1485,11 @@ static const struct user_regset native_regsets[] = {
.size = sizeof(vector128), .align = sizeof(vector128),
.active = tm_cvmx_active, .get = tm_cvmx_get, .set = tm_cvmx_set
},
+ [REGSET_TM_CVSX] = {
+ .core_note_type = NT_PPC_TM_CVSX, .n = ELF_NVSX,
+ .size = sizeof(double), .align = sizeof(double),
+ .active = tm_cvsx_active, .get = tm_cvsx_get, .set = tm_cvsx_set
+ },
#endif
};
@@ -1608,6 +1732,11 @@ static const struct user_regset compat_regsets[] = {
.size = sizeof(vector128), .align = sizeof(vector128),
.active = tm_cvmx_active, .get = tm_cvmx_get, .set = tm_cvmx_set
},
+ [REGSET_TM_CVSX] = {
+ .core_note_type = NT_PPC_TM_CVSX, .n = ELF_NVSX,
+ .size = sizeof(double), .align = sizeof(double),
+ .active = tm_cvsx_active, .get = tm_cvsx_get, .set = tm_cvsx_set
+ },
#endif
};
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 11/30] powerpc/ptrace: Enable support for TM SPR state
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (9 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 10/30] powerpc/ptrace: Enable support for NT_PPC_CVSX wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 12/30] powerpc/ptrace: Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR wei.guo.simon
` (18 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch enables support for TM SPR state related ELF core
note NT_PPC_TM_SPR based ptrace requests through PTRACE_GETREGSET,
PTRACE_SETREGSET calls. This is achieved through adding a register
set REGSET_TM_SPR in powerpc corresponding to the ELF core note
section added. It implements the get, set and active functions for
this new register set added.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
arch/powerpc/include/uapi/asm/elf.h | 1 +
arch/powerpc/kernel/ptrace.c | 143 +++++++++++++++++++++++++++++++++++-
2 files changed, 143 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/include/uapi/asm/elf.h b/arch/powerpc/include/uapi/asm/elf.h
index 1549172..e703c64 100644
--- a/arch/powerpc/include/uapi/asm/elf.h
+++ b/arch/powerpc/include/uapi/asm/elf.h
@@ -93,6 +93,7 @@
#define ELF_NFPREG 33 /* includes fpscr */
#define ELF_NVMX 34 /* includes all vector registers */
#define ELF_NVSX 32 /* includes all VSX registers */
+#define ELF_NTMSPRREG 3 /* include tfhar, tfiar, texasr */
typedef unsigned long elf_greg_t64;
typedef elf_greg_t64 elf_gregset_t64[ELF_NGREG];
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index c8bf7e9..24a6296 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -66,6 +66,7 @@ struct pt_regs_offset {
#define TVSO(f) (offsetof(struct thread_vr_state, f))
#define TFSO(f) (offsetof(struct thread_fp_state, f))
+#define TSO(f) (offsetof(struct thread_struct, f))
static const struct pt_regs_offset regoffset_table[] = {
GPR_OFFSET_NAME(0),
@@ -1412,7 +1413,136 @@ static int tm_cvsx_set(struct task_struct *target,
return ret;
}
-#endif
+
+/**
+ * tm_spr_active - get active number of registers in TM SPR
+ * @target: The target task.
+ * @regset: The user regset structure.
+ *
+ * This function checks the active number of available
+ * regisers in the transactional memory SPR category.
+ */
+static int tm_spr_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ return regset->n;
+}
+
+/**
+ * tm_spr_get - get the TM related SPR registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy from.
+ * @ubuf: User buffer to copy into.
+ *
+ * This function gets transactional memory related SPR registers.
+ * The userspace interface buffer layout is as follows.
+ *
+ * struct {
+ * u64 tm_tfhar;
+ * u64 tm_texasr;
+ * u64 tm_tfiar;
+ * };
+ */
+static int tm_spr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ /* Build tests */
+ BUILD_BUG_ON(TSO(tm_tfhar) + sizeof(u64) != TSO(tm_texasr));
+ BUILD_BUG_ON(TSO(tm_texasr) + sizeof(u64) != TSO(tm_tfiar));
+ BUILD_BUG_ON(TSO(tm_tfiar) + sizeof(u64) != TSO(ckpt_regs));
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ /* Flush the states */
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ /* TFHAR register */
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_tfhar, 0, sizeof(u64));
+
+ /* TEXASR register */
+ if (!ret)
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_texasr, sizeof(u64),
+ 2 * sizeof(u64));
+
+ /* TFIAR register */
+ if (!ret)
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_tfiar,
+ 2 * sizeof(u64), 3 * sizeof(u64));
+ return ret;
+}
+
+/**
+ * tm_spr_set - set the TM related SPR registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy into.
+ * @ubuf: User buffer to copy from.
+ *
+ * This function sets transactional memory related SPR registers.
+ * The userspace interface buffer layout is as follows.
+ *
+ * struct {
+ * u64 tm_tfhar;
+ * u64 tm_texasr;
+ * u64 tm_tfiar;
+ * };
+ */
+static int tm_spr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ /* Build tests */
+ BUILD_BUG_ON(TSO(tm_tfhar) + sizeof(u64) != TSO(tm_texasr));
+ BUILD_BUG_ON(TSO(tm_texasr) + sizeof(u64) != TSO(tm_tfiar));
+ BUILD_BUG_ON(TSO(tm_tfiar) + sizeof(u64) != TSO(ckpt_regs));
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ /* Flush the states */
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ /* TFHAR register */
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_tfhar, 0, sizeof(u64));
+
+ /* TEXASR register */
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_texasr, sizeof(u64),
+ 2 * sizeof(u64));
+
+ /* TFIAR register */
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_tfiar,
+ 2 * sizeof(u64), 3 * sizeof(u64));
+ return ret;
+}
+#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
/*
* These are our native regset flavors.
@@ -1434,6 +1564,7 @@ enum powerpc_regset {
REGSET_TM_CFPR, /* TM checkpointed FPR registers */
REGSET_TM_CVMX, /* TM checkpointed VMX registers */
REGSET_TM_CVSX, /* TM checkpointed VSX registers */
+ REGSET_TM_SPR, /* TM specific SPR registers */
#endif
};
@@ -1490,6 +1621,11 @@ static const struct user_regset native_regsets[] = {
.size = sizeof(double), .align = sizeof(double),
.active = tm_cvsx_active, .get = tm_cvsx_get, .set = tm_cvsx_set
},
+ [REGSET_TM_SPR] = {
+ .core_note_type = NT_PPC_TM_SPR, .n = ELF_NTMSPRREG,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = tm_spr_active, .get = tm_spr_get, .set = tm_spr_set
+ },
#endif
};
@@ -1737,6 +1873,11 @@ static const struct user_regset compat_regsets[] = {
.size = sizeof(double), .align = sizeof(double),
.active = tm_cvsx_active, .get = tm_cvsx_get, .set = tm_cvsx_set
},
+ [REGSET_TM_SPR] = {
+ .core_note_type = NT_PPC_TM_SPR, .n = ELF_NTMSPRREG,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = tm_spr_active, .get = tm_spr_get, .set = tm_spr_set
+ },
#endif
};
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 12/30] powerpc/ptrace: Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (10 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 11/30] powerpc/ptrace: Enable support for TM SPR state wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 13/30] powerpc/ptrace: Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR wei.guo.simon
` (17 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch enables support for all three TM checkpointed SPR
states related ELF core note NT_PPC_TM_CTAR, NT_PPC_TM_CPPR,
NT_PPC_TM_CDSCR based ptrace requests through PTRACE_GETREGSET,
PTRACE_SETREGSET calls. This is achieved through adding three
new register sets REGSET_TM_CTAR, REGSET_TM_CPPR and
REGSET_TM_CDSCR in powerpc corresponding to the ELF core note
sections added. It implements the get, set and active functions
for all these new register sets added.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
arch/powerpc/kernel/ptrace.c | 178 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 178 insertions(+)
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 24a6296..2ce5f86 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -1542,6 +1542,151 @@ static int tm_spr_set(struct task_struct *target,
2 * sizeof(u64), 3 * sizeof(u64));
return ret;
}
+
+static int tm_tar_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (MSR_TM_ACTIVE(target->thread.regs->msr))
+ return regset->n;
+
+ return 0;
+}
+
+static int tm_tar_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_tar, 0, sizeof(u64));
+ return ret;
+}
+
+static int tm_tar_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_tar, 0, sizeof(u64));
+ return ret;
+}
+
+static int tm_ppr_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (MSR_TM_ACTIVE(target->thread.regs->msr))
+ return regset->n;
+
+ return 0;
+}
+
+
+static int tm_ppr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_ppr, 0, sizeof(u64));
+ return ret;
+}
+
+static int tm_ppr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_ppr, 0, sizeof(u64));
+ return ret;
+}
+
+static int tm_dscr_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (MSR_TM_ACTIVE(target->thread.regs->msr))
+ return regset->n;
+
+ return 0;
+}
+
+static int tm_dscr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_dscr, 0, sizeof(u64));
+ return ret;
+}
+
+static int tm_dscr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_dscr, 0, sizeof(u64));
+ return ret;
+}
#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
/*
@@ -1565,6 +1710,9 @@ enum powerpc_regset {
REGSET_TM_CVMX, /* TM checkpointed VMX registers */
REGSET_TM_CVSX, /* TM checkpointed VSX registers */
REGSET_TM_SPR, /* TM specific SPR registers */
+ REGSET_TM_CTAR, /* TM checkpointed TAR register */
+ REGSET_TM_CPPR, /* TM checkpointed PPR register */
+ REGSET_TM_CDSCR, /* TM checkpointed DSCR register */
#endif
};
@@ -1626,6 +1774,21 @@ static const struct user_regset native_regsets[] = {
.size = sizeof(u64), .align = sizeof(u64),
.active = tm_spr_active, .get = tm_spr_get, .set = tm_spr_set
},
+ [REGSET_TM_CTAR] = {
+ .core_note_type = NT_PPC_TM_CTAR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = tm_tar_active, .get = tm_tar_get, .set = tm_tar_set
+ },
+ [REGSET_TM_CPPR] = {
+ .core_note_type = NT_PPC_TM_CPPR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = tm_ppr_active, .get = tm_ppr_get, .set = tm_ppr_set
+ },
+ [REGSET_TM_CDSCR] = {
+ .core_note_type = NT_PPC_TM_CDSCR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
+ },
#endif
};
@@ -1878,6 +2041,21 @@ static const struct user_regset compat_regsets[] = {
.size = sizeof(u64), .align = sizeof(u64),
.active = tm_spr_active, .get = tm_spr_get, .set = tm_spr_set
},
+ [REGSET_TM_CTAR] = {
+ .core_note_type = NT_PPC_TM_CTAR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = tm_tar_active, .get = tm_tar_get, .set = tm_tar_set
+ },
+ [REGSET_TM_CPPR] = {
+ .core_note_type = NT_PPC_TM_CPPR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = tm_ppr_active, .get = tm_ppr_get, .set = tm_ppr_set
+ },
+ [REGSET_TM_CDSCR] = {
+ .core_note_type = NT_PPC_TM_CDSCR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
+ },
#endif
};
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 13/30] powerpc/ptrace: Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (11 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 12/30] powerpc/ptrace: Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 14/30] powerpc/ptrace: Enable support for EBB registers wei.guo.simon
` (16 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch enables support for running TAR, PPR, DSCR registers
related ELF core notes NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR based
ptrace requests through PTRACE_GETREGSET, PTRACE_SETREGSET calls.
This is achieved through adding three new register sets REGSET_TAR,
REGSET_PPR, REGSET_DSCR in powerpc corresponding to the ELF core
note sections added in this regad. It implements the get, set and
active functions for all these new register sets added.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
arch/powerpc/kernel/ptrace.c | 117 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 117 insertions(+)
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 2ce5f86..c710060 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -1689,6 +1689,78 @@ static int tm_dscr_set(struct task_struct *target,
}
#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
+#ifdef CONFIG_PPC64
+static int ppr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ppr, 0, sizeof(u64));
+ return ret;
+}
+
+static int ppr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ppr, 0, sizeof(u64));
+ return ret;
+}
+
+static int dscr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.dscr, 0, sizeof(u64));
+ return ret;
+}
+static int dscr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.dscr, 0, sizeof(u64));
+ return ret;
+}
+#endif
+#ifdef CONFIG_PPC_BOOK3S_64
+static int tar_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tar, 0, sizeof(u64));
+ return ret;
+}
+static int tar_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tar, 0, sizeof(u64));
+ return ret;
+}
+#endif
/*
* These are our native regset flavors.
*/
@@ -1714,6 +1786,13 @@ enum powerpc_regset {
REGSET_TM_CPPR, /* TM checkpointed PPR register */
REGSET_TM_CDSCR, /* TM checkpointed DSCR register */
#endif
+#ifdef CONFIG_PPC64
+ REGSET_PPR, /* PPR register */
+ REGSET_DSCR, /* DSCR register */
+#endif
+#ifdef CONFIG_PPC_BOOK3S_64
+ REGSET_TAR, /* TAR register */
+#endif
};
static const struct user_regset native_regsets[] = {
@@ -1790,6 +1869,25 @@ static const struct user_regset native_regsets[] = {
.active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
},
#endif
+#ifdef CONFIG_PPC64
+ [REGSET_PPR] = {
+ .core_note_type = NT_PPC_PPR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .get = ppr_get, .set = ppr_set
+ },
+ [REGSET_DSCR] = {
+ .core_note_type = NT_PPC_DSCR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .get = dscr_get, .set = dscr_set
+ },
+#endif
+#ifdef CONFIG_PPC_BOOK3S_64
+ [REGSET_TAR] = {
+ .core_note_type = NT_PPC_TAR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .get = tar_get, .set = tar_set
+ },
+#endif
};
static const struct user_regset_view user_ppc_native_view = {
@@ -2057,6 +2155,25 @@ static const struct user_regset compat_regsets[] = {
.active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
},
#endif
+#ifdef CONFIG_PPC64
+ [REGSET_PPR] = {
+ .core_note_type = NT_PPC_PPR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .get = ppr_get, .set = ppr_set
+ },
+ [REGSET_DSCR] = {
+ .core_note_type = NT_PPC_DSCR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .get = dscr_get, .set = dscr_set
+ },
+#endif
+#ifdef CONFIG_PPC_BOOK3S_64
+ [REGSET_TAR] = {
+ .core_note_type = NT_PPC_TAR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .get = tar_get, .set = tar_set
+ },
+#endif
};
static const struct user_regset_view user_ppc_compat_view = {
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 14/30] powerpc/ptrace: Enable support for EBB registers
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (12 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 13/30] powerpc/ptrace: Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 15/30] powerpc/ptrace: Enable support for Performance Monitor registers wei.guo.simon
` (15 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch enables support for EBB state registers related
ELF core note NT_PPC_EBB based ptrace requests through
PTRACE_GETREGSET, PTRACE_SETREGSET calls. This is achieved
through adding one new register sets REGSET_EBB in powerpc
corresponding to the ELF core note sections added in this
regard. It also implements the get, set and active functions
for this new register sets added.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
arch/powerpc/include/uapi/asm/elf.h | 1 +
arch/powerpc/kernel/ptrace.c | 75 +++++++++++++++++++++++++++++++++++++
2 files changed, 76 insertions(+)
diff --git a/arch/powerpc/include/uapi/asm/elf.h b/arch/powerpc/include/uapi/asm/elf.h
index e703c64..8c4d71a 100644
--- a/arch/powerpc/include/uapi/asm/elf.h
+++ b/arch/powerpc/include/uapi/asm/elf.h
@@ -94,6 +94,7 @@
#define ELF_NVMX 34 /* includes all vector registers */
#define ELF_NVSX 32 /* includes all VSX registers */
#define ELF_NTMSPRREG 3 /* include tfhar, tfiar, texasr */
+#define ELF_NEBB 3 /* includes ebbrr, ebbhr, bescr */
typedef unsigned long elf_greg_t64;
typedef elf_greg_t64 elf_gregset_t64[ELF_NGREG];
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index c710060..5cbabdb 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -1760,6 +1760,70 @@ static int tar_set(struct task_struct *target,
&target->thread.tar, 0, sizeof(u64));
return ret;
}
+
+static int ebb_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_ARCH_207S))
+ return -ENODEV;
+
+ if (target->thread.used_ebb)
+ return regset->n;
+
+ return 0;
+}
+
+static int ebb_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ /* Build tests */
+ BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr));
+ BUILD_BUG_ON(TSO(ebbhr) + sizeof(unsigned long) != TSO(bescr));
+
+ if (!cpu_has_feature(CPU_FTR_ARCH_207S))
+ return -ENODEV;
+
+ if (!target->thread.used_ebb)
+ return -ENODATA;
+
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ebbrr, 0, 3 * sizeof(unsigned long));
+}
+
+static int ebb_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret = 0;
+
+ /* Build tests */
+ BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr));
+ BUILD_BUG_ON(TSO(ebbhr) + sizeof(unsigned long) != TSO(bescr));
+
+ if (!cpu_has_feature(CPU_FTR_ARCH_207S))
+ return -ENODEV;
+
+ if (target->thread.used_ebb)
+ return -ENODATA;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ebbrr, 0, sizeof(unsigned long));
+
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ebbhr, sizeof(unsigned long),
+ 2 * sizeof(unsigned long));
+
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.bescr,
+ 2 * sizeof(unsigned long), 3 * sizeof(unsigned long));
+
+ return ret;
+}
#endif
/*
* These are our native regset flavors.
@@ -1792,6 +1856,7 @@ enum powerpc_regset {
#endif
#ifdef CONFIG_PPC_BOOK3S_64
REGSET_TAR, /* TAR register */
+ REGSET_EBB, /* EBB registers */
#endif
};
@@ -1887,6 +1952,11 @@ static const struct user_regset native_regsets[] = {
.size = sizeof(u64), .align = sizeof(u64),
.get = tar_get, .set = tar_set
},
+ [REGSET_EBB] = {
+ .core_note_type = NT_PPC_EBB, .n = ELF_NEBB,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = ebb_active, .get = ebb_get, .set = ebb_set
+ },
#endif
};
@@ -2173,6 +2243,11 @@ static const struct user_regset compat_regsets[] = {
.size = sizeof(u64), .align = sizeof(u64),
.get = tar_get, .set = tar_set
},
+ [REGSET_EBB] = {
+ .core_note_type = NT_PPC_EBB, .n = ELF_NEBB,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = ebb_active, .get = ebb_get, .set = ebb_set
+ },
#endif
};
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 15/30] powerpc/ptrace: Enable support for Performance Monitor registers
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (13 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 14/30] powerpc/ptrace: Enable support for EBB registers wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 16/30] selftests/powerpc: Add more SPR numbers, TM & VMX instructions to 'reg.h' wei.guo.simon
` (14 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch enables support for Performance monitor registers related
ELF core note NT_PPC_PMU based ptrace requests through
PTRACE_GETREGSET, PTRACE_SETREGSET calls. This is achieved
through adding one new register sets REGSET_PMU in powerpc
corresponding to the ELF core note sections added in this
regard. It also implements the get, set and active functions
for this new register sets added.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
arch/powerpc/include/uapi/asm/elf.h | 3 +-
arch/powerpc/kernel/ptrace.c | 75 +++++++++++++++++++++++++++++++++++++
2 files changed, 77 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/include/uapi/asm/elf.h b/arch/powerpc/include/uapi/asm/elf.h
index 8c4d71a..3a9e44c 100644
--- a/arch/powerpc/include/uapi/asm/elf.h
+++ b/arch/powerpc/include/uapi/asm/elf.h
@@ -94,7 +94,8 @@
#define ELF_NVMX 34 /* includes all vector registers */
#define ELF_NVSX 32 /* includes all VSX registers */
#define ELF_NTMSPRREG 3 /* include tfhar, tfiar, texasr */
-#define ELF_NEBB 3 /* includes ebbrr, ebbhr, bescr */
+#define ELF_NEBB 3 /* includes ebbrr, ebbhr, bescr */
+#define ELF_NPMU 5 /* includes siar, sdar, sier, mmcr2, mmcr0 */
typedef unsigned long elf_greg_t64;
typedef elf_greg_t64 elf_gregset_t64[ELF_NGREG];
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 5cbabdb..1d8998b 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -1824,6 +1824,75 @@ static int ebb_set(struct task_struct *target,
return ret;
}
+static int pmu_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_ARCH_207S))
+ return -ENODEV;
+
+ return regset->n;
+}
+
+static int pmu_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ /* Build tests */
+ BUILD_BUG_ON(TSO(siar) + sizeof(unsigned long) != TSO(sdar));
+ BUILD_BUG_ON(TSO(sdar) + sizeof(unsigned long) != TSO(sier));
+ BUILD_BUG_ON(TSO(sier) + sizeof(unsigned long) != TSO(mmcr2));
+ BUILD_BUG_ON(TSO(mmcr2) + sizeof(unsigned long) != TSO(mmcr0));
+
+ if (!cpu_has_feature(CPU_FTR_ARCH_207S))
+ return -ENODEV;
+
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.siar, 0,
+ 5 * sizeof(unsigned long));
+}
+
+static int pmu_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret = 0;
+
+ /* Build tests */
+ BUILD_BUG_ON(TSO(siar) + sizeof(unsigned long) != TSO(sdar));
+ BUILD_BUG_ON(TSO(sdar) + sizeof(unsigned long) != TSO(sier));
+ BUILD_BUG_ON(TSO(sier) + sizeof(unsigned long) != TSO(mmcr2));
+ BUILD_BUG_ON(TSO(mmcr2) + sizeof(unsigned long) != TSO(mmcr0));
+
+ if (!cpu_has_feature(CPU_FTR_ARCH_207S))
+ return -ENODEV;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.siar, 0,
+ sizeof(unsigned long));
+
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.sdar, sizeof(unsigned long),
+ 2 * sizeof(unsigned long));
+
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.sier, 2 * sizeof(unsigned long),
+ 3 * sizeof(unsigned long));
+
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.mmcr2, 3 * sizeof(unsigned long),
+ 4 * sizeof(unsigned long));
+
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.mmcr0, 4 * sizeof(unsigned long),
+ 5 * sizeof(unsigned long));
+ return ret;
+}
#endif
/*
* These are our native regset flavors.
@@ -1857,6 +1926,7 @@ enum powerpc_regset {
#ifdef CONFIG_PPC_BOOK3S_64
REGSET_TAR, /* TAR register */
REGSET_EBB, /* EBB registers */
+ REGSET_PMR, /* Performance Monitor Registers */
#endif
};
@@ -1957,6 +2027,11 @@ static const struct user_regset native_regsets[] = {
.size = sizeof(u64), .align = sizeof(u64),
.active = ebb_active, .get = ebb_get, .set = ebb_set
},
+ [REGSET_PMR] = {
+ .core_note_type = NT_PPC_PMU, .n = ELF_NPMU,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = pmu_active, .get = pmu_get, .set = pmu_set
+ },
#endif
};
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 16/30] selftests/powerpc: Add more SPR numbers, TM & VMX instructions to 'reg.h'
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (14 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 15/30] powerpc/ptrace: Enable support for Performance Monitor registers wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 17/30] selftests/powerpc: Use the new SPRN_DSCR_PRIV definiton wei.guo.simon
` (13 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch adds SPR number for TAR, PPR, DSCR special
purpose registers. It also adds TM, VSX, VMX related
instructions which will then be used by patches later
in the series.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
tools/testing/selftests/powerpc/reg.h | 42 ++++++++++++++++++++++++++++++++---
1 file changed, 39 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/powerpc/reg.h b/tools/testing/selftests/powerpc/reg.h
index 65bfdee..5183349 100644
--- a/tools/testing/selftests/powerpc/reg.h
+++ b/tools/testing/selftests/powerpc/reg.h
@@ -18,6 +18,19 @@
#define mb() asm volatile("sync" : : : "memory");
+/* Vector Instructions */
+#define VSX_XX1(xs, ra, rb) (((xs) & 0x1f) << 21 | ((ra) << 16) | \
+ ((rb) << 11) | (((xs) >> 5)))
+#define STXVD2X(xs, ra, rb) .long (0x7c000798 | VSX_XX1((xs), (ra), (rb)))
+#define LXVD2X(xs, ra, rb) .long (0x7c000698 | VSX_XX1((xs), (ra), (rb)))
+
+/* TM instructions */
+#define TBEGIN ".long 0x7C00051D;"
+#define TABORT ".long 0x7C00071D;"
+#define TEND ".long 0x7C00055D;"
+#define TSUSPEND ".long 0x7C0005DD;"
+#define TRESUME ".long 0x7C2005DD;"
+
#define SPRN_MMCR2 769
#define SPRN_MMCRA 770
#define SPRN_MMCR0 779
@@ -46,10 +59,33 @@
#define SPRN_SDAR 781
#define SPRN_SIER 768
-#define SPRN_TEXASR 0x82
+#define SPRN_TEXASR 0x82 /* Transaction Exception and Status Register */
#define SPRN_TFIAR 0x81 /* Transaction Failure Inst Addr */
#define SPRN_TFHAR 0x80 /* Transaction Failure Handler Addr */
-#define TEXASR_FS 0x08000000
-#define SPRN_TAR 0x32f
+#define SPRN_TAR 0x32f /* Target Address Register */
+
+#define SPRN_DSCR_PRIV 0x11 /* Privilege State DSCR */
+#define SPRN_DSCR 0x03 /* Data Stream Control Register */
+#define SPRN_PPR 896 /* Program Priority Register */
+
+/* TEXASR register bits */
+#define TEXASR_FC 0xFE00000000000000
+#define TEXASR_FP 0x0100000000000000
+#define TEXASR_DA 0x0080000000000000
+#define TEXASR_NO 0x0040000000000000
+#define TEXASR_FO 0x0020000000000000
+#define TEXASR_SIC 0x0010000000000000
+#define TEXASR_NTC 0x0008000000000000
+#define TEXASR_TC 0x0004000000000000
+#define TEXASR_TIC 0x0002000000000000
+#define TEXASR_IC 0x0001000000000000
+#define TEXASR_IFC 0x0000800000000000
+#define TEXASR_ABT 0x0000000100000000
+#define TEXASR_SPD 0x0000000080000000
+#define TEXASR_HV 0x0000000020000000
+#define TEXASR_PR 0x0000000010000000
+#define TEXASR_FS 0x0000000008000000
+#define TEXASR_TE 0x0000000004000000
+#define TEXASR_ROT 0x0000000002000000
#endif /* _SELFTESTS_POWERPC_REG_H */
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 17/30] selftests/powerpc: Use the new SPRN_DSCR_PRIV definiton
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (15 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 16/30] selftests/powerpc: Add more SPR numbers, TM & VMX instructions to 'reg.h' wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 18/30] selftests/powerpc: Add ptrace tests for EBB wei.guo.simon
` (12 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Now that the new DSCR register definitions (SPRN_DSCR_PRIV and
SPRN_DSCR) are defined outside this directory, use them instead.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
tools/testing/selftests/powerpc/dscr/dscr.h | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/tools/testing/selftests/powerpc/dscr/dscr.h b/tools/testing/selftests/powerpc/dscr/dscr.h
index a36af1b..18ea223b 100644
--- a/tools/testing/selftests/powerpc/dscr/dscr.h
+++ b/tools/testing/selftests/powerpc/dscr/dscr.h
@@ -28,8 +28,6 @@
#include "utils.h"
-#define SPRN_DSCR 0x11 /* Privilege state SPR */
-#define SPRN_DSCR_USR 0x03 /* Problem state SPR */
#define THREADS 100 /* Max threads */
#define COUNT 100 /* Max iterations */
#define DSCR_MAX 16 /* Max DSCR value */
@@ -48,14 +46,14 @@ inline unsigned long get_dscr(void)
{
unsigned long ret;
- asm volatile("mfspr %0,%1" : "=r" (ret): "i" (SPRN_DSCR));
+ asm volatile("mfspr %0,%1" : "=r" (ret) : "i" (SPRN_DSCR_PRIV));
return ret;
}
inline void set_dscr(unsigned long val)
{
- asm volatile("mtspr %1,%0" : : "r" (val), "i" (SPRN_DSCR));
+ asm volatile("mtspr %1,%0" : : "r" (val), "i" (SPRN_DSCR_PRIV));
}
/* Problem state DSCR access */
@@ -63,14 +61,14 @@ inline unsigned long get_dscr_usr(void)
{
unsigned long ret;
- asm volatile("mfspr %0,%1" : "=r" (ret): "i" (SPRN_DSCR_USR));
+ asm volatile("mfspr %0,%1" : "=r" (ret) : "i" (SPRN_DSCR));
return ret;
}
inline void set_dscr_usr(unsigned long val)
{
- asm volatile("mtspr %1,%0" : : "r" (val), "i" (SPRN_DSCR_USR));
+ asm volatile("mtspr %1,%0" : : "r" (val), "i" (SPRN_DSCR));
}
/* Default DSCR access */
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 18/30] selftests/powerpc: Add ptrace tests for EBB
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (16 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 17/30] selftests/powerpc: Use the new SPRN_DSCR_PRIV definiton wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 19/30] selftests/powerpc: Add ptrace tests for GPR/FPR registers wei.guo.simon
` (11 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch adds ptrace interface test for EBB/PMU specific
registers. This also adds some generic ptrace interface
based helper functions to be used by other patches later
on in the series.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
tools/testing/selftests/powerpc/Makefile | 3 +-
tools/testing/selftests/powerpc/ptrace/Makefile | 7 +
.../testing/selftests/powerpc/ptrace/ptrace-ebb.c | 185 ++++++++++++++++
.../testing/selftests/powerpc/ptrace/ptrace-ebb.h | 102 +++++++++
tools/testing/selftests/powerpc/ptrace/ptrace.h | 240 +++++++++++++++++++++
5 files changed, 536 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/Makefile
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-ebb.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-ebb.h
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace.h
diff --git a/tools/testing/selftests/powerpc/Makefile b/tools/testing/selftests/powerpc/Makefile
index 4ca83fe..b7cb9f7 100644
--- a/tools/testing/selftests/powerpc/Makefile
+++ b/tools/testing/selftests/powerpc/Makefile
@@ -24,7 +24,8 @@ SUB_DIRS = benchmarks \
syscalls \
tm \
vphn \
- math
+ math \
+ ptrace
endif
diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
new file mode 100644
index 0000000..f6948f3
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -0,0 +1,7 @@
+TEST_PROGS := ptrace-ebb
+all: $(TEST_PROGS)
+CFLAGS += -m64
+$(TEST_PROGS): ../harness.c ptrace.S ../utils.c ptrace.h
+ptrace-ebb: ../pmu/event.c ../pmu/lib.c ../pmu/ebb/ebb_handler.S ../pmu/ebb/busy_loop.S
+clean:
+ rm -f $(TEST_PROGS) *.o
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-ebb.c b/tools/testing/selftests/powerpc/ptrace/ptrace-ebb.c
new file mode 100644
index 0000000..fa0b541
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-ebb.c
@@ -0,0 +1,185 @@
+/*
+ * Ptrace interface test for EBB
+ *
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include "../pmu/ebb/ebb.h"
+#include "ptrace.h"
+#include "ptrace-ebb.h"
+
+/* Tracer and Tracee Shared Data */
+int shm_id;
+volatile int *cptr, *pptr;
+
+void ebb(void)
+{
+ struct event event;
+
+ cptr = (int *)shmat(shm_id, NULL, 0);
+
+ event_init_named(&event, 0x1001e, "cycles");
+ event.attr.config |= (1ull << 63);
+ event.attr.exclusive = 1;
+ event.attr.pinned = 1;
+ event.attr.exclude_kernel = 1;
+ event.attr.exclude_hv = 1;
+ event.attr.exclude_idle = 1;
+
+ if (event_open(&event)) {
+ perror("event_open() failed");
+ exit(1);
+ }
+
+ setup_ebb_handler(standard_ebb_callee);
+ mtspr(SPRN_BESCR, 0x8000000100000000ull);
+
+ mb();
+
+ if (ebb_event_enable(&event)) {
+ perror("ebb_event_handler() failed");
+ exit(1);
+ }
+
+ mtspr(SPRN_PMC1, pmc_sample_period(SAMPLE_PERIOD));
+ core_busy_loop();
+ cptr[0] = 1;
+ while (1);
+
+ exit(0);
+}
+
+int validate_ebb(struct ebb_regs *regs)
+{
+ #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+ struct opd *opd = (struct opd *) ebb_handler;
+ #endif
+
+ printf("EBBRR: %lx\n", regs->ebbrr);
+ #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+ printf("EBBHR: %lx; expected: %lx\n",
+ regs->ebbhr, (unsigned long)opd->entry);
+ #else
+ printf("EBBHR: %lx; expected: %lx\n",
+ regs->ebbhr, (unsigned long)ebb_handler);
+ #endif
+ printf("BESCR: %lx\n", regs->bescr);
+
+ #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+ if (regs->ebbhr != opd->entry)
+ return TEST_FAIL;
+ #else
+ if (regs->ebbhr != (unsigned long) ebb_handler)
+ return TEST_FAIL;
+ #endif
+
+ return TEST_PASS;
+}
+
+int validate_pmu(struct pmu_regs *regs)
+{
+ printf("SIAR: %lx\n", regs->siar);
+ printf("SDAR: %lx\n", regs->sdar);
+ printf("SIER: %lx; expected: %lx\n",
+ regs->sier, (unsigned long)SIER_EXP);
+ printf("MMCR2: %lx; expected: %lx\n",
+ regs->mmcr2, (unsigned long)MMCR2_EXP);
+ printf("MMCR0: %lx; expected: %lx\n",
+ regs->mmcr0, (unsigned long)MMCR0_EXP);
+
+ /* Validate SIER */
+ if (regs->sier != SIER_EXP)
+ return TEST_FAIL;
+
+ /* Validate MMCR2 */
+ if (regs->mmcr2 != MMCR2_EXP)
+ return TEST_FAIL;
+
+ /* Validate MMCR0 */
+ if (regs->mmcr0 != MMCR0_EXP)
+ return TEST_FAIL;
+
+ return TEST_PASS;
+}
+
+int trace_ebb_pmu(pid_t child)
+{
+ struct ebb_regs ebb_regs;
+ struct pmu_regs pmu_regs;
+ int ret;
+
+ ret = start_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_ebb_registers(child, &ebb_regs);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_ebb(&ebb_regs);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_pmu_registers(child, &pmu_regs);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_pmu(&pmu_regs);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = stop_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ return TEST_PASS;
+}
+
+int ptrace_ebb_pmu(void)
+{
+ pid_t pid;
+ int ret, status;
+
+ shm_id = shmget(IPC_PRIVATE, sizeof(int) * 1, 0777|IPC_CREAT);
+ pid = fork();
+ if (pid < 0) {
+ perror("fork() failed");
+ return TEST_FAIL;
+ }
+
+ if (pid == 0)
+ ebb();
+
+ if (pid) {
+ pptr = (int *)shmat(shm_id, NULL, 0);
+ while (!pptr[0]);
+
+ ret = trace_ebb_pmu(pid);
+ if (ret)
+ return TEST_FAIL;
+
+ shmctl(shm_id, IPC_RMID, NULL);
+ kill(pid, SIGKILL);
+ ret = wait(&status);
+ if (ret != pid) {
+ printf("Child's exit status not captured\n");
+ return TEST_FAIL;
+ }
+
+ if (WIFEXITED(status)) {
+ if (WEXITSTATUS(status))
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+ }
+ return TEST_PASS;
+}
+
+int main(int argc, char *argv[])
+{
+ return test_harness(ptrace_ebb_pmu, "ptrace_ebb_pmu");
+}
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-ebb.h b/tools/testing/selftests/powerpc/ptrace/ptrace-ebb.h
new file mode 100644
index 0000000..e53d301
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-ebb.h
@@ -0,0 +1,102 @@
+/*
+ * Inspired mostly from the EBB selftest
+ *
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#define SAMPLE_PERIOD 100 /* EBB event sample persiod */
+
+/* Standard expected values */
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+#define MMCR0_EXP 0x8000008000000001
+#else
+#define MMCR0_EXP 0x180000080
+#endif
+
+#define MMCR2_EXP 0
+#define SIER_EXP 0x2000000
+
+struct opd {
+ u64 entry;
+ u64 toc;
+};
+
+void (*ebb_user_func)(void);
+extern void ebb_handler(void); /* Defined in ebb_handle.S */
+
+void ebb_hook(void) /* Called by ebb_handler */
+{
+ if (ebb_user_func)
+ ebb_user_func();
+}
+
+void setup_ebb_handler(void (*callee)(void))
+{
+ u64 entry;
+
+#if defined(_CALL_ELF) && _CALL_ELF == 2
+ entry = (u64)ebb_handler;
+#else
+ struct opd *opd;
+
+ opd = (struct opd *)ebb_handler;
+ entry = opd->entry;
+#endif
+ ebb_user_func = callee;
+
+ /* Ensure ebb_user_func is set before we set the handler */
+ mb();
+ mtspr(SPRN_EBBHR, entry);
+
+ /* Make sure the handler is set before we return */
+ mb();
+}
+
+void reset_ebb_with_clear_mask(unsigned long mmcr0_clear_mask)
+{
+ u64 val;
+
+ /* 2) clear MMCR0[PMAO] - docs say BESCR[PMEO] should do this */
+ /* 3) set MMCR0[PMAE] - docs say BESCR[PME] should do this */
+ val = mfspr(SPRN_MMCR0);
+ mtspr(SPRN_MMCR0, (val & ~mmcr0_clear_mask) | MMCR0_PMAE);
+
+ /* 4) clear BESCR[PMEO] */
+ mtspr(SPRN_BESCRR, BESCR_PMEO);
+
+ /* 5) set BESCR[PME] */
+ mtspr(SPRN_BESCRS, BESCR_PME);
+
+ /* 6) rfebb 1 - done in our caller */
+}
+
+void standard_ebb_callee(void)
+{
+ u64 val;
+
+ val = mfspr(SPRN_BESCR);
+ if (!(val & BESCR_PMEO))
+ printf("Spurious interrupt\n");
+
+ mtspr(SPRN_PMC1, pmc_sample_period(SAMPLE_PERIOD));
+ reset_ebb_with_clear_mask(MMCR0_PMAO | MMCR0_FC);
+}
+
+int ebb_event_enable(struct event *e)
+{
+ int rc;
+
+ mb();
+
+ rc = ioctl(e->fd, PERF_EVENT_IOC_ENABLE);
+ if (rc)
+ return rc;
+ rc = event_read(e);
+
+ mb();
+ return rc;
+}
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace.h b/tools/testing/selftests/powerpc/ptrace/ptrace.h
new file mode 100644
index 0000000..37d7c59
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace.h
@@ -0,0 +1,240 @@
+/*
+ * Ptrace interface test helper functions
+ *
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <inttypes.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <malloc.h>
+#include <errno.h>
+#include <time.h>
+#include <sys/ptrace.h>
+#include <sys/ioctl.h>
+#include <sys/uio.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/signal.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#include <sys/user.h>
+#include <linux/elf.h>
+#include <linux/types.h>
+#include <linux/auxvec.h>
+#include "../reg.h"
+#include "utils.h"
+
+/* ELF core note sections */
+#define NT_PPC_TAR 0x103 /* Target Address Register */
+#define NT_PPC_PPR 0x104 /* Program Priority Register */
+#define NT_PPC_DSCR 0x105 /* Data Stream Control Register */
+#define NT_PPC_EBB 0x106 /* Event Based Branch Registers */
+#define NT_PPC_PMR 0x107 /* Performance Monitor Registers */
+#define NT_PPC_TM_CGPR 0x108 /* TM checkpointed GPR Registers */
+#define NT_PPC_TM_CFPR 0x109 /* TM checkpointed FPR Registers */
+#define NT_PPC_TM_CVMX 0x10a /* TM checkpointed VMX Registers */
+#define NT_PPC_TM_CVSX 0x10b /* TM checkpointed VSX Registers */
+#define NT_PPC_TM_SPR 0x10c /* TM Special Purpose Registers */
+#define NT_PPC_TM_CTAR 0x10d /* TM checkpointed Target Address Register */
+#define NT_PPC_TM_CPPR 0x10e /* TM checkpointed Program Priority Register */
+#define NT_PPC_TM_CDSCR 0x10f /* TM checkpointed Data Stream Control Register */
+
+#define TEST_PASS 0
+#define TEST_FAIL 1
+
+struct ebb_regs {
+ unsigned long ebbrr;
+ unsigned long ebbhr;
+ unsigned long bescr;
+};
+
+struct pmu_regs {
+ unsigned long siar;
+ unsigned long sdar;
+ unsigned long sier;
+ unsigned long mmcr2;
+ unsigned long mmcr0;
+};
+
+struct fpr_regs {
+ unsigned long fpr[32];
+ unsigned long fpscr;
+};
+
+
+/* Basic ptrace operations */
+int start_trace(pid_t child)
+{
+ int ret;
+
+ ret = ptrace(PTRACE_ATTACH, child, NULL, NULL);
+ if (ret) {
+ perror("ptrace(PTRACE_ATTACH) failed");
+ return TEST_FAIL;
+ }
+ ret = waitpid(child, NULL, 0);
+ if (ret != child) {
+ perror("waitpid() failed");
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+}
+
+int stop_trace(pid_t child)
+{
+ int ret;
+
+ ret = ptrace(PTRACE_DETACH, child, NULL, NULL);
+ if (ret) {
+ perror("ptrace(PTRACE_DETACH) failed");
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+}
+
+int cont_trace(pid_t child)
+{
+ int ret;
+
+ ret = ptrace(PTRACE_CONT, child, NULL, NULL);
+ if (ret) {
+ perror("ptrace(PTRACE_CONT) failed");
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+}
+
+/* PMU */
+int show_pmu_registers(pid_t child, struct pmu_regs *regs)
+{
+ struct pmu_regs *pmu;
+ struct iovec iov;
+ int ret;
+
+ pmu = malloc(sizeof(struct pmu_regs));
+ if (!pmu) {
+ perror("malloc() failed");
+ return TEST_FAIL;
+ }
+
+ iov.iov_base = (struct pmu_regs *) pmu;
+ iov.iov_len = sizeof(struct pmu_regs);
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_PMR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ goto fail;
+ }
+
+ if (regs)
+ memcpy(regs, pmu, sizeof(struct pmu_regs));
+
+ free(pmu);
+ return TEST_PASS;
+fail:
+ free(pmu);
+ return TEST_FAIL;
+}
+
+/* EBB */
+int show_ebb_registers(pid_t child, struct ebb_regs *regs)
+{
+ struct ebb_regs *ebb;
+ struct iovec iov;
+ int ret;
+
+ ebb = malloc(sizeof(struct ebb_regs));
+ if (!ebb) {
+ perror("malloc() failed");
+ return TEST_FAIL;
+ }
+
+ iov.iov_base = (struct ebb_regs *) ebb;
+ iov.iov_len = sizeof(struct ebb_regs);
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_EBB, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ goto fail;
+ }
+
+ if (regs)
+ memcpy(regs, ebb, sizeof(struct ebb_regs));
+
+ free(ebb);
+ return TEST_PASS;
+fail:
+ free(ebb);
+ return TEST_FAIL;
+}
+
+/* Analyse TEXASR after TM failure */
+inline unsigned long get_tfiar(void)
+{
+ unsigned long ret;
+
+ asm volatile("mfspr %0,%1" : "=r" (ret) : "i" (SPRN_TFIAR));
+ return ret;
+}
+
+void analyse_texasr(unsigned long texasr)
+{
+ printf("TEXASR: %16lx\t", texasr);
+
+ if (texasr & TEXASR_FP)
+ printf("TEXASR_FP ");
+
+ if (texasr & TEXASR_DA)
+ printf("TEXASR_DA ");
+
+ if (texasr & TEXASR_NO)
+ printf("TEXASR_NO ");
+
+ if (texasr & TEXASR_FO)
+ printf("TEXASR_FO ");
+
+ if (texasr & TEXASR_SIC)
+ printf("TEXASR_SIC ");
+
+ if (texasr & TEXASR_NTC)
+ printf("TEXASR_NTC ");
+
+ if (texasr & TEXASR_TC)
+ printf("TEXASR_TC ");
+
+ if (texasr & TEXASR_TIC)
+ printf("TEXASR_TIC ");
+
+ if (texasr & TEXASR_IC)
+ printf("TEXASR_IC ");
+
+ if (texasr & TEXASR_IFC)
+ printf("TEXASR_IFC ");
+
+ if (texasr & TEXASR_ABT)
+ printf("TEXASR_ABT ");
+
+ if (texasr & TEXASR_SPD)
+ printf("TEXASR_SPD ");
+
+ if (texasr & TEXASR_HV)
+ printf("TEXASR_HV ");
+
+ if (texasr & TEXASR_PR)
+ printf("TEXASR_PR ");
+
+ if (texasr & TEXASR_FS)
+ printf("TEXASR_FS ");
+
+ if (texasr & TEXASR_TE)
+ printf("TEXASR_TE ");
+
+ if (texasr & TEXASR_ROT)
+ printf("TEXASR_ROT ");
+
+ printf("TFIAR :%lx\n", get_tfiar());
+}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 19/30] selftests/powerpc: Add ptrace tests for GPR/FPR registers
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (17 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 18/30] selftests/powerpc: Add ptrace tests for EBB wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 20/30] selftests/powerpc: Add ptrace tests for GPR/FPR registers in TM wei.guo.simon
` (10 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch adds ptrace interface test for GPR/FPR registers.
This adds ptrace interface based helper functions related to
GPR/FPR access and some assembly helper functions related to
GPR/FPR registers.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 3 +-
.../testing/selftests/powerpc/ptrace/ptrace-gpr.c | 199 ++++++++++++++++++++
.../testing/selftests/powerpc/ptrace/ptrace-gpr.h | 74 ++++++++
tools/testing/selftests/powerpc/ptrace/ptrace.S | 131 +++++++++++++
tools/testing/selftests/powerpc/ptrace/ptrace.h | 208 +++++++++++++++++++++
5 files changed, 614 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-gpr.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-gpr.h
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace.S
diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
index f6948f3..31e8e33 100644
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -1,4 +1,5 @@
-TEST_PROGS := ptrace-ebb
+TEST_PROGS := ptrace-ebb ptrace-gpr
+
all: $(TEST_PROGS)
CFLAGS += -m64
$(TEST_PROGS): ../harness.c ptrace.S ../utils.c ptrace.h
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-gpr.c b/tools/testing/selftests/powerpc/ptrace/ptrace-gpr.c
new file mode 100644
index 0000000..86bd6a4d
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-gpr.c
@@ -0,0 +1,199 @@
+/*
+ * Ptrace test for GPR/FPR registers
+ *
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include "ptrace.h"
+#include "ptrace-gpr.h"
+
+/* Tracer and Tracee Shared Data */
+int shm_id;
+volatile int *cptr, *pptr;
+
+void store_gpr(unsigned long *addr);
+void store_fpr(float *addr);
+
+float a = FPR_1;
+float b = FPR_2;
+float c = FPR_3;
+
+void gpr(void)
+{
+ unsigned long gpr_buf[18];
+ float fpr_buf[32];
+
+ cptr = (int *)shmat(shm_id, NULL, 0);
+
+ asm __volatile__(
+ "li 14, %[gpr_1];"
+ "li 15, %[gpr_1];"
+ "li 16, %[gpr_1];"
+ "li 17, %[gpr_1];"
+ "li 18, %[gpr_1];"
+ "li 19, %[gpr_1];"
+ "li 20, %[gpr_1];"
+ "li 21, %[gpr_1];"
+ "li 22, %[gpr_1];"
+ "li 23, %[gpr_1];"
+ "li 24, %[gpr_1];"
+ "li 25, %[gpr_1];"
+ "li 26, %[gpr_1];"
+ "li 27, %[gpr_1];"
+ "li 28, %[gpr_1];"
+ "li 29, %[gpr_1];"
+ "li 30, %[gpr_1];"
+ "li 31, %[gpr_1];"
+
+ "lfs 0, 0(%[flt_1]);"
+ "lfs 1, 0(%[flt_1]);"
+ "lfs 2, 0(%[flt_1]);"
+ "lfs 3, 0(%[flt_1]);"
+ "lfs 4, 0(%[flt_1]);"
+ "lfs 5, 0(%[flt_1]);"
+ "lfs 6, 0(%[flt_1]);"
+ "lfs 7, 0(%[flt_1]);"
+ "lfs 8, 0(%[flt_1]);"
+ "lfs 9, 0(%[flt_1]);"
+ "lfs 10, 0(%[flt_1]);"
+ "lfs 11, 0(%[flt_1]);"
+ "lfs 12, 0(%[flt_1]);"
+ "lfs 13, 0(%[flt_1]);"
+ "lfs 14, 0(%[flt_1]);"
+ "lfs 15, 0(%[flt_1]);"
+ "lfs 16, 0(%[flt_1]);"
+ "lfs 17, 0(%[flt_1]);"
+ "lfs 18, 0(%[flt_1]);"
+ "lfs 19, 0(%[flt_1]);"
+ "lfs 20, 0(%[flt_1]);"
+ "lfs 21, 0(%[flt_1]);"
+ "lfs 22, 0(%[flt_1]);"
+ "lfs 23, 0(%[flt_1]);"
+ "lfs 24, 0(%[flt_1]);"
+ "lfs 25, 0(%[flt_1]);"
+ "lfs 26, 0(%[flt_1]);"
+ "lfs 27, 0(%[flt_1]);"
+ "lfs 28, 0(%[flt_1]);"
+ "lfs 29, 0(%[flt_1]);"
+ "lfs 30, 0(%[flt_1]);"
+ "lfs 31, 0(%[flt_1]);"
+
+ :
+ : [gpr_1]"i"(GPR_1), [flt_1] "r" (&a)
+ : "memory", "r6", "r7", "r8", "r9", "r10",
+ "r11", "r12", "r13", "r14", "r15", "r16", "r17",
+ "r18", "r19", "r20", "r21", "r22", "r23", "r24",
+ "r25", "r26", "r27", "r28", "r29", "r30", "r31"
+ );
+
+ cptr[1] = 1;
+
+ while (!cptr[0]);
+
+ shmdt((void *)cptr);
+ store_gpr(gpr_buf);
+ store_fpr(fpr_buf);
+
+ if (validate_gpr(gpr_buf, GPR_3))
+ exit(1);
+
+ if (validate_fpr_float(fpr_buf, c))
+ exit(1);
+
+ exit(0);
+}
+
+int trace_gpr(pid_t child)
+{
+ unsigned long gpr[18];
+ unsigned long fpr[32];
+ int ret;
+
+ ret = start_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_gpr(child, gpr);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_gpr(gpr, GPR_1);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_fpr(child, fpr);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_fpr(fpr, FPR_1_REP);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = write_gpr(child, GPR_3);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = write_fpr(child, FPR_3_REP);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = stop_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ return TEST_PASS;
+}
+
+int ptrace_gpr(void)
+{
+ pid_t pid;
+ int ret, status;
+
+ shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);
+ pid = fork();
+ if (pid < 0) {
+ perror("fork() failed");
+ return TEST_FAIL;
+ }
+ if (pid == 0)
+ gpr();
+
+ if (pid) {
+ pptr = (int *)shmat(shm_id, NULL, 0);
+ while (!pptr[1]);
+
+ ret = trace_gpr(pid);
+ if (ret) {
+ kill(pid, SIGTERM);
+ shmdt((void *)pptr);
+ shmctl(shm_id, IPC_RMID, NULL);
+ return TEST_FAIL;
+ }
+
+ pptr[0] = 1;
+ shmdt((void *)pptr);
+
+ ret = wait(&status);
+ shmctl(shm_id, IPC_RMID, NULL);
+ if (ret != pid) {
+ printf("Child's exit status not captured\n");
+ return TEST_FAIL;
+ }
+
+ if (WIFEXITED(status)) {
+ if (WEXITSTATUS(status))
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+ }
+ return TEST_PASS;
+}
+
+int main(int argc, char *argv[])
+{
+ return test_harness(ptrace_gpr, "ptrace_gpr");
+}
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-gpr.h b/tools/testing/selftests/powerpc/ptrace/ptrace-gpr.h
new file mode 100644
index 0000000..e30fef6
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-gpr.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#define GPR_1 1
+#define GPR_2 2
+#define GPR_3 3
+#define GPR_4 4
+
+#define FPR_1 0.001
+#define FPR_2 0.002
+#define FPR_3 0.003
+#define FPR_4 0.004
+
+#define FPR_1_REP 0x3f50624de0000000
+#define FPR_2_REP 0x3f60624de0000000
+#define FPR_3_REP 0x3f689374c0000000
+#define FPR_4_REP 0x3f70624de0000000
+
+/* Buffer must have 18 elements */
+int validate_gpr(unsigned long *gpr, unsigned long val)
+{
+ int i, found = 1;
+
+ for (i = 0; i < 18; i++) {
+ if (gpr[i] != val) {
+ printf("GPR[%d]: %lx Expected: %lx\n",
+ i+14, gpr[i], val);
+ found = 0;
+ }
+ }
+
+ if (!found)
+ return TEST_FAIL;
+ return TEST_PASS;
+}
+
+/* Buffer must have 32 elements */
+int validate_fpr(unsigned long *fpr, unsigned long val)
+{
+ int i, found = 1;
+
+ for (i = 0; i < 32; i++) {
+ if (fpr[i] != val) {
+ printf("FPR[%d]: %lx Expected: %lx\n", i, fpr[i], val);
+ found = 0;
+ }
+ }
+
+ if (!found)
+ return TEST_FAIL;
+ return TEST_PASS;
+}
+
+/* Buffer must have 32 elements */
+int validate_fpr_float(float *fpr, float val)
+{
+ int i, found = 1;
+
+ for (i = 0; i < 32; i++) {
+ if (fpr[i] != val) {
+ printf("FPR[%d]: %f Expected: %f\n", i, fpr[i], val);
+ found = 0;
+ }
+ }
+
+ if (!found)
+ return TEST_FAIL;
+ return TEST_PASS;
+}
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace.S b/tools/testing/selftests/powerpc/ptrace/ptrace.S
new file mode 100644
index 0000000..193beea
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace.S
@@ -0,0 +1,131 @@
+/*
+ * Ptrace interface test helper assembly functions
+ *
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <ppc-asm.h>
+#include "../reg.h"
+
+
+/* Non volatile GPR - unsigned long buf[18] */
+FUNC_START(load_gpr)
+ ld 14, 0*8(3)
+ ld 15, 1*8(3)
+ ld 16, 2*8(3)
+ ld 17, 3*8(3)
+ ld 18, 4*8(3)
+ ld 19, 5*8(3)
+ ld 20, 6*8(3)
+ ld 21, 7*8(3)
+ ld 22, 8*8(3)
+ ld 23, 9*8(3)
+ ld 24, 10*8(3)
+ ld 25, 11*8(3)
+ ld 26, 12*8(3)
+ ld 27, 13*8(3)
+ ld 28, 14*8(3)
+ ld 29, 15*8(3)
+ ld 30, 16*8(3)
+ ld 31, 17*8(3)
+ blr
+FUNC_END(load_gpr)
+
+FUNC_START(store_gpr)
+ std 14, 0*8(3)
+ std 15, 1*8(3)
+ std 16, 2*8(3)
+ std 17, 3*8(3)
+ std 18, 4*8(3)
+ std 19, 5*8(3)
+ std 20, 6*8(3)
+ std 21, 7*8(3)
+ std 22, 8*8(3)
+ std 23, 9*8(3)
+ std 24, 10*8(3)
+ std 25, 11*8(3)
+ std 26, 12*8(3)
+ std 27, 13*8(3)
+ std 28, 14*8(3)
+ std 29, 15*8(3)
+ std 30, 16*8(3)
+ std 31, 17*8(3)
+ blr
+FUNC_END(store_gpr)
+
+/* Single Precision Float - float buf[32] */
+FUNC_START(load_fpr)
+ lfs 0, 0*4(3)
+ lfs 1, 1*4(3)
+ lfs 2, 2*4(3)
+ lfs 3, 3*4(3)
+ lfs 4, 4*4(3)
+ lfs 5, 5*4(3)
+ lfs 6, 6*4(3)
+ lfs 7, 7*4(3)
+ lfs 8, 8*4(3)
+ lfs 9, 9*4(3)
+ lfs 10, 10*4(3)
+ lfs 11, 11*4(3)
+ lfs 12, 12*4(3)
+ lfs 13, 13*4(3)
+ lfs 14, 14*4(3)
+ lfs 15, 15*4(3)
+ lfs 16, 16*4(3)
+ lfs 17, 17*4(3)
+ lfs 18, 18*4(3)
+ lfs 19, 19*4(3)
+ lfs 20, 20*4(3)
+ lfs 21, 21*4(3)
+ lfs 22, 22*4(3)
+ lfs 23, 23*4(3)
+ lfs 24, 24*4(3)
+ lfs 25, 25*4(3)
+ lfs 26, 26*4(3)
+ lfs 27, 27*4(3)
+ lfs 28, 28*4(3)
+ lfs 29, 29*4(3)
+ lfs 30, 30*4(3)
+ lfs 31, 31*4(3)
+ blr
+FUNC_END(load_fpr)
+
+FUNC_START(store_fpr)
+ stfs 0, 0*4(3)
+ stfs 1, 1*4(3)
+ stfs 2, 2*4(3)
+ stfs 3, 3*4(3)
+ stfs 4, 4*4(3)
+ stfs 5, 5*4(3)
+ stfs 6, 6*4(3)
+ stfs 7, 7*4(3)
+ stfs 8, 8*4(3)
+ stfs 9, 9*4(3)
+ stfs 10, 10*4(3)
+ stfs 11, 11*4(3)
+ stfs 12, 12*4(3)
+ stfs 13, 13*4(3)
+ stfs 14, 14*4(3)
+ stfs 15, 15*4(3)
+ stfs 16, 16*4(3)
+ stfs 17, 17*4(3)
+ stfs 18, 18*4(3)
+ stfs 19, 19*4(3)
+ stfs 20, 20*4(3)
+ stfs 21, 21*4(3)
+ stfs 22, 22*4(3)
+ stfs 23, 23*4(3)
+ stfs 24, 24*4(3)
+ stfs 25, 25*4(3)
+ stfs 26, 26*4(3)
+ stfs 27, 27*4(3)
+ stfs 28, 28*4(3)
+ stfs 29, 29*4(3)
+ stfs 30, 30*4(3)
+ stfs 31, 31*4(3)
+ blr
+FUNC_END(store_fpr)
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace.h b/tools/testing/selftests/powerpc/ptrace/ptrace.h
index 37d7c59..b6df47f 100644
--- a/tools/testing/selftests/powerpc/ptrace/ptrace.h
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace.h
@@ -172,6 +172,214 @@ fail:
return TEST_FAIL;
}
+/* FPR */
+int show_fpr(pid_t child, unsigned long *fpr)
+{
+ struct fpr_regs *regs;
+ int ret, i;
+
+ regs = (struct fpr_regs *) malloc(sizeof(struct fpr_regs));
+ ret = ptrace(PTRACE_GETFPREGS, child, NULL, regs);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+
+ if (fpr) {
+ for (i = 0; i < 32; i++)
+ fpr[i] = regs->fpr[i];
+ }
+ return TEST_PASS;
+}
+
+int write_fpr(pid_t child, unsigned long val)
+{
+ struct fpr_regs *regs;
+ int ret, i;
+
+ regs = (struct fpr_regs *) malloc(sizeof(struct fpr_regs));
+ ret = ptrace(PTRACE_GETFPREGS, child, NULL, regs);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+
+ for (i = 0; i < 32; i++)
+ regs->fpr[i] = val;
+
+ ret = ptrace(PTRACE_SETFPREGS, child, NULL, regs);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+}
+
+int show_ckpt_fpr(pid_t child, unsigned long *fpr)
+{
+ struct fpr_regs *regs;
+ struct iovec iov;
+ int ret, i;
+
+ regs = (struct fpr_regs *) malloc(sizeof(struct fpr_regs));
+ iov.iov_base = regs;
+ iov.iov_len = sizeof(struct fpr_regs);
+
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CFPR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+
+ if (fpr) {
+ for (i = 0; i < 32; i++)
+ fpr[i] = regs->fpr[i];
+ }
+
+ return TEST_PASS;
+}
+
+int write_ckpt_fpr(pid_t child, unsigned long val)
+{
+ struct fpr_regs *regs;
+ struct iovec iov;
+ int ret, i;
+
+ regs = (struct fpr_regs *) malloc(sizeof(struct fpr_regs));
+ iov.iov_base = regs;
+ iov.iov_len = sizeof(struct fpr_regs);
+
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CFPR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+
+ for (i = 0; i < 32; i++)
+ regs->fpr[i] = val;
+
+ ret = ptrace(PTRACE_SETREGSET, child, NT_PPC_TM_CFPR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+}
+
+/* GPR */
+int show_gpr(pid_t child, unsigned long *gpr)
+{
+ struct pt_regs *regs;
+ int ret, i;
+
+ regs = (struct pt_regs *) malloc(sizeof(struct pt_regs));
+ if (!regs) {
+ perror("malloc() failed");
+ return TEST_FAIL;
+ }
+
+ ret = ptrace(PTRACE_GETREGS, child, NULL, regs);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+
+ if (gpr) {
+ for (i = 14; i < 32; i++)
+ gpr[i-14] = regs->gpr[i];
+ }
+
+ return TEST_PASS;
+}
+
+int write_gpr(pid_t child, unsigned long val)
+{
+ struct pt_regs *regs;
+ int i, ret;
+
+ regs = (struct pt_regs *) malloc(sizeof(struct pt_regs));
+ if (!regs) {
+ perror("malloc() failed");
+ return TEST_FAIL;
+ }
+
+ ret = ptrace(PTRACE_GETREGS, child, NULL, regs);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+
+ for (i = 14; i < 32; i++)
+ regs->gpr[i] = val;
+
+ ret = ptrace(PTRACE_SETREGS, child, NULL, regs);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+}
+
+int show_ckpt_gpr(pid_t child, unsigned long *gpr)
+{
+ struct pt_regs *regs;
+ struct iovec iov;
+ int ret, i;
+
+ regs = (struct pt_regs *) malloc(sizeof(struct pt_regs));
+ if (!regs) {
+ perror("malloc() failed");
+ return TEST_FAIL;
+ }
+
+ iov.iov_base = (u64 *) regs;
+ iov.iov_len = sizeof(struct pt_regs);
+
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CGPR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+
+ if (gpr) {
+ for (i = 14; i < 32; i++)
+ gpr[i-14] = regs->gpr[i];
+ }
+
+ return TEST_PASS;
+}
+
+int write_ckpt_gpr(pid_t child, unsigned long val)
+{
+ struct pt_regs *regs;
+ struct iovec iov;
+ int ret, i;
+
+ regs = (struct pt_regs *) malloc(sizeof(struct pt_regs));
+ if (!regs) {
+ perror("malloc() failed\n");
+ return TEST_FAIL;
+ }
+ iov.iov_base = (u64 *) regs;
+ iov.iov_len = sizeof(struct pt_regs);
+
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CGPR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+
+ for (i = 14; i < 32; i++)
+ regs->gpr[i] = val;
+
+ ret = ptrace(PTRACE_SETREGSET, child, NT_PPC_TM_CGPR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+}
+
/* Analyse TEXASR after TM failure */
inline unsigned long get_tfiar(void)
{
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 20/30] selftests/powerpc: Add ptrace tests for GPR/FPR registers in TM
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (18 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 19/30] selftests/powerpc: Add ptrace tests for GPR/FPR registers wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 21/30] selftests/powerpc: Add ptrace tests for GPR/FPR registers in suspended TM wei.guo.simon
` (9 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch adds ptrace interface test for GPR/FPR registers
inside TM context. This adds ptrace interface based helper
functions related to checkpointed GPR/FPR access.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 3 +-
.../selftests/powerpc/ptrace/ptrace-tm-gpr.c | 299 +++++++++++++++++++++
2 files changed, 301 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-gpr.c
diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
index 31e8e33..170683a 100644
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -1,8 +1,9 @@
-TEST_PROGS := ptrace-ebb ptrace-gpr
+TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr
all: $(TEST_PROGS)
CFLAGS += -m64
$(TEST_PROGS): ../harness.c ptrace.S ../utils.c ptrace.h
ptrace-ebb: ../pmu/event.c ../pmu/lib.c ../pmu/ebb/ebb_handler.S ../pmu/ebb/busy_loop.S
+
clean:
rm -f $(TEST_PROGS) *.o
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-gpr.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-gpr.c
new file mode 100644
index 0000000..51eb71e
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-gpr.c
@@ -0,0 +1,299 @@
+/*
+ * Ptrace test for GPR/FPR registers in TM context
+ *
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include "ptrace.h"
+#include "ptrace-gpr.h"
+
+/* Tracer and Tracee Shared Data */
+int shm_id;
+volatile unsigned long *cptr, *pptr;
+
+void store_gpr(unsigned long *addr);
+void store_fpr(float *addr);
+
+float a = FPR_1;
+float b = FPR_2;
+float c = FPR_3;
+
+void tm_gpr(void)
+{
+ unsigned long gpr_buf[18];
+ unsigned long result, texasr;
+ float fpr_buf[32];
+
+ printf("Starting the child\n");
+ cptr = (unsigned long *)shmat(shm_id, NULL, 0);
+
+trans:
+ cptr[1] = 0;
+ asm __volatile__(
+
+ "li 14, %[gpr_1];"
+ "li 15, %[gpr_1];"
+ "li 16, %[gpr_1];"
+ "li 17, %[gpr_1];"
+ "li 18, %[gpr_1];"
+ "li 19, %[gpr_1];"
+ "li 20, %[gpr_1];"
+ "li 21, %[gpr_1];"
+ "li 22, %[gpr_1];"
+ "li 23, %[gpr_1];"
+ "li 24, %[gpr_1];"
+ "li 25, %[gpr_1];"
+ "li 26, %[gpr_1];"
+ "li 27, %[gpr_1];"
+ "li 28, %[gpr_1];"
+ "li 29, %[gpr_1];"
+ "li 30, %[gpr_1];"
+ "li 31, %[gpr_1];"
+
+ "lfs 0, 0(%[flt_1]);"
+ "lfs 1, 0(%[flt_1]);"
+ "lfs 2, 0(%[flt_1]);"
+ "lfs 3, 0(%[flt_1]);"
+ "lfs 4, 0(%[flt_1]);"
+ "lfs 5, 0(%[flt_1]);"
+ "lfs 6, 0(%[flt_1]);"
+ "lfs 7, 0(%[flt_1]);"
+ "lfs 8, 0(%[flt_1]);"
+ "lfs 9, 0(%[flt_1]);"
+ "lfs 10, 0(%[flt_1]);"
+ "lfs 11, 0(%[flt_1]);"
+ "lfs 12, 0(%[flt_1]);"
+ "lfs 13, 0(%[flt_1]);"
+ "lfs 14, 0(%[flt_1]);"
+ "lfs 15, 0(%[flt_1]);"
+ "lfs 16, 0(%[flt_1]);"
+ "lfs 17, 0(%[flt_1]);"
+ "lfs 18, 0(%[flt_1]);"
+ "lfs 19, 0(%[flt_1]);"
+ "lfs 20, 0(%[flt_1]);"
+ "lfs 21, 0(%[flt_1]);"
+ "lfs 22, 0(%[flt_1]);"
+ "lfs 23, 0(%[flt_1]);"
+ "lfs 24, 0(%[flt_1]);"
+ "lfs 25, 0(%[flt_1]);"
+ "lfs 26, 0(%[flt_1]);"
+ "lfs 27, 0(%[flt_1]);"
+ "lfs 28, 0(%[flt_1]);"
+ "lfs 29, 0(%[flt_1]);"
+ "lfs 30, 0(%[flt_1]);"
+ "lfs 31, 0(%[flt_1]);"
+
+ "1: ;"
+ TBEGIN
+ "beq 2f;"
+
+ "li 14, %[gpr_2];"
+ "li 15, %[gpr_2];"
+ "li 16, %[gpr_2];"
+ "li 17, %[gpr_2];"
+ "li 18, %[gpr_2];"
+ "li 19, %[gpr_2];"
+ "li 20, %[gpr_2];"
+ "li 21, %[gpr_2];"
+ "li 22, %[gpr_2];"
+ "li 23, %[gpr_2];"
+ "li 24, %[gpr_2];"
+ "li 25, %[gpr_2];"
+ "li 26, %[gpr_2];"
+ "li 27, %[gpr_2];"
+ "li 28, %[gpr_2];"
+ "li 29, %[gpr_2];"
+ "li 30, %[gpr_2];"
+ "li 31, %[gpr_2];"
+
+
+ "lfs 0, 0(%[flt_2]);"
+ "lfs 1, 0(%[flt_2]);"
+ "lfs 2, 0(%[flt_2]);"
+ "lfs 3, 0(%[flt_2]);"
+ "lfs 4, 0(%[flt_2]);"
+ "lfs 5, 0(%[flt_2]);"
+ "lfs 6, 0(%[flt_2]);"
+ "lfs 7, 0(%[flt_2]);"
+ "lfs 8, 0(%[flt_2]);"
+ "lfs 9, 0(%[flt_2]);"
+ "lfs 10, 0(%[flt_2]);"
+ "lfs 11, 0(%[flt_2]);"
+ "lfs 12, 0(%[flt_2]);"
+ "lfs 13, 0(%[flt_2]);"
+ "lfs 14, 0(%[flt_2]);"
+ "lfs 15, 0(%[flt_2]);"
+ "lfs 16, 0(%[flt_2]);"
+ "lfs 17, 0(%[flt_2]);"
+ "lfs 18, 0(%[flt_2]);"
+ "lfs 19, 0(%[flt_2]);"
+ "lfs 20, 0(%[flt_2]);"
+ "lfs 21, 0(%[flt_2]);"
+ "lfs 22, 0(%[flt_2]);"
+ "lfs 23, 0(%[flt_2]);"
+ "lfs 24, 0(%[flt_2]);"
+ "lfs 25, 0(%[flt_2]);"
+ "lfs 26, 0(%[flt_2]);"
+ "lfs 27, 0(%[flt_2]);"
+ "lfs 28, 0(%[flt_2]);"
+ "lfs 29, 0(%[flt_2]);"
+ "lfs 30, 0(%[flt_2]);"
+ "lfs 31, 0(%[flt_2]);"
+ TSUSPEND
+ "li 7, 1;"
+ "stw 7, 0(%[cptr1]);"
+ TRESUME
+ "b .;"
+
+ TEND
+ "li 0, 0;"
+ "ori %[res], 0, 0;"
+ "b 3f;"
+
+ /* Transaction abort handler */
+ "2: ;"
+ "li 0, 1;"
+ "ori %[res], 0, 0;"
+ "mfspr %[texasr], %[sprn_texasr];"
+
+ "3: ;"
+ : [res] "=r" (result), [texasr] "=r" (texasr)
+ : [gpr_1]"i"(GPR_1), [gpr_2]"i"(GPR_2),
+ [sprn_texasr] "i" (SPRN_TEXASR), [flt_1] "r" (&a),
+ [flt_2] "r" (&b), [cptr1] "r" (&cptr[1])
+ : "memory", "r7", "r8", "r9", "r10",
+ "r11", "r12", "r13", "r14", "r15", "r16",
+ "r17", "r18", "r19", "r20", "r21", "r22",
+ "r23", "r24", "r25", "r26", "r27", "r28",
+ "r29", "r30", "r31"
+ );
+
+ if (result) {
+ if (!cptr[0])
+ goto trans;
+
+ shmdt((void *)cptr);
+ store_gpr(gpr_buf);
+ store_fpr(fpr_buf);
+
+ if (validate_gpr(gpr_buf, GPR_3))
+ exit(1);
+
+ if (validate_fpr_float(fpr_buf, c))
+ exit(1);
+
+ exit(0);
+ }
+ shmdt((void *)cptr);
+ exit(1);
+}
+
+int trace_tm_gpr(pid_t child)
+{
+ unsigned long gpr[18];
+ unsigned long fpr[32];
+ int ret;
+
+ ret = start_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_gpr(child, gpr);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_gpr(gpr, GPR_2);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_fpr(child, fpr);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_fpr(fpr, FPR_2_REP);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_ckpt_fpr(child, fpr);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_fpr(fpr, FPR_1_REP);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_ckpt_gpr(child, gpr);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_gpr(gpr, GPR_1);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = write_ckpt_gpr(child, GPR_3);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = write_ckpt_fpr(child, FPR_3_REP);
+ if (ret)
+ return TEST_FAIL;
+
+ pptr[0] = 1;
+ ret = stop_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ return TEST_PASS;
+}
+
+int ptrace_tm_gpr(void)
+{
+ pid_t pid;
+ int ret, status;
+
+ SKIP_IF(!((long)get_auxv_entry(AT_HWCAP2) & PPC_FEATURE2_HTM));
+ shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);
+ pid = fork();
+ if (pid < 0) {
+ perror("fork() failed");
+ return TEST_FAIL;
+ }
+ if (pid == 0)
+ tm_gpr();
+
+ if (pid) {
+ pptr = (unsigned long *)shmat(shm_id, NULL, 0);
+
+ while (!pptr[1]);
+ ret = trace_tm_gpr(pid);
+ if (ret) {
+ kill(pid, SIGTERM);
+ return TEST_FAIL;
+ }
+
+ shmdt((void *)pptr);
+
+ ret = wait(&status);
+ shmctl(shm_id, IPC_RMID, NULL);
+ if (ret != pid) {
+ printf("Child's exit status not captured\n");
+ return TEST_FAIL;
+ }
+
+ if (WIFEXITED(status)) {
+ if (WEXITSTATUS(status))
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+ }
+ return TEST_PASS;
+}
+
+int main(int argc, char *argv[])
+{
+ return test_harness(ptrace_tm_gpr, "ptrace_tm_gpr");
+}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 21/30] selftests/powerpc: Add ptrace tests for GPR/FPR registers in suspended TM
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (19 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 20/30] selftests/powerpc: Add ptrace tests for GPR/FPR registers in TM wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 22/30] selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR registers wei.guo.simon
` (8 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch adds ptrace interface test for GPR/FPR registers
inside suspended TM context.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 2 +-
.../selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c | 327 +++++++++++++++++++++
2 files changed, 328 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c
diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
index 170683a..d0f000c 100644
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -1,4 +1,4 @@
-TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr
+TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr ptrace-tm-spd-gpr
all: $(TEST_PROGS)
CFLAGS += -m64
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c
new file mode 100644
index 0000000..b144e87
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c
@@ -0,0 +1,327 @@
+/*
+ * Ptrace test for GPR/FPR registers in TM Suspend context
+ *
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include "ptrace.h"
+#include "ptrace-gpr.h"
+
+/* Tracer and Tracee Shared Data */
+int shm_id;
+volatile int *cptr, *pptr;
+
+void store_gpr(unsigned long *addr);
+void store_fpr(float *addr);
+
+float a = FPR_1;
+float b = FPR_2;
+float c = FPR_3;
+float d = FPR_4;
+
+__attribute__((used)) void wait_parent(void)
+{
+ cptr[2] = 1;
+ while (!cptr[1]);
+}
+
+void tm_spd_gpr(void)
+{
+ unsigned long gpr_buf[18];
+ unsigned long result, texasr;
+ float fpr_buf[32];
+
+ cptr = (int *)shmat(shm_id, NULL, 0);
+
+trans:
+ cptr[2] = 0;
+ asm __volatile__(
+
+ "li 14, %[gpr_1];"
+ "li 15, %[gpr_1];"
+ "li 16, %[gpr_1];"
+ "li 17, %[gpr_1];"
+ "li 18, %[gpr_1];"
+ "li 19, %[gpr_1];"
+ "li 20, %[gpr_1];"
+ "li 21, %[gpr_1];"
+ "li 22, %[gpr_1];"
+ "li 23, %[gpr_1];"
+ "li 24, %[gpr_1];"
+ "li 25, %[gpr_1];"
+ "li 26, %[gpr_1];"
+ "li 27, %[gpr_1];"
+ "li 28, %[gpr_1];"
+ "li 29, %[gpr_1];"
+ "li 30, %[gpr_1];"
+ "li 31, %[gpr_1];"
+
+ "lfs 0, 0(%[flt_1]);"
+ "lfs 1, 0(%[flt_1]);"
+ "lfs 2, 0(%[flt_1]);"
+ "lfs 3, 0(%[flt_1]);"
+ "lfs 4, 0(%[flt_1]);"
+ "lfs 5, 0(%[flt_1]);"
+ "lfs 6, 0(%[flt_1]);"
+ "lfs 7, 0(%[flt_1]);"
+ "lfs 8, 0(%[flt_1]);"
+ "lfs 9, 0(%[flt_1]);"
+ "lfs 10, 0(%[flt_1]);"
+ "lfs 11, 0(%[flt_1]);"
+ "lfs 12, 0(%[flt_1]);"
+ "lfs 13, 0(%[flt_1]);"
+ "lfs 14, 0(%[flt_1]);"
+ "lfs 15, 0(%[flt_1]);"
+ "lfs 16, 0(%[flt_1]);"
+ "lfs 17, 0(%[flt_1]);"
+ "lfs 18, 0(%[flt_1]);"
+ "lfs 19, 0(%[flt_1]);"
+ "lfs 20, 0(%[flt_1]);"
+ "lfs 21, 0(%[flt_1]);"
+ "lfs 22, 0(%[flt_1]);"
+ "lfs 23, 0(%[flt_1]);"
+ "lfs 24, 0(%[flt_1]);"
+ "lfs 25, 0(%[flt_1]);"
+ "lfs 26, 0(%[flt_1]);"
+ "lfs 27, 0(%[flt_1]);"
+ "lfs 28, 0(%[flt_1]);"
+ "lfs 29, 0(%[flt_1]);"
+ "lfs 30, 0(%[flt_1]);"
+ "lfs 31, 0(%[flt_1]);"
+
+ "1: ;"
+ TBEGIN
+ "beq 2f;"
+
+ "li 14, %[gpr_2];"
+ "li 15, %[gpr_2];"
+ "li 16, %[gpr_2];"
+ "li 17, %[gpr_2];"
+ "li 18, %[gpr_2];"
+ "li 19, %[gpr_2];"
+ "li 20, %[gpr_2];"
+ "li 21, %[gpr_2];"
+ "li 22, %[gpr_2];"
+ "li 23, %[gpr_2];"
+ "li 24, %[gpr_2];"
+ "li 25, %[gpr_2];"
+ "li 26, %[gpr_2];"
+ "li 27, %[gpr_2];"
+ "li 28, %[gpr_2];"
+ "li 29, %[gpr_2];"
+ "li 30, %[gpr_2];"
+ "li 31, %[gpr_2];"
+
+ TSUSPEND
+
+ "li 14, %[gpr_4];"
+ "li 15, %[gpr_4];"
+ "li 16, %[gpr_4];"
+ "li 17, %[gpr_4];"
+ "li 18, %[gpr_4];"
+ "li 19, %[gpr_4];"
+ "li 20, %[gpr_4];"
+ "li 21, %[gpr_4];"
+ "li 22, %[gpr_4];"
+ "li 23, %[gpr_4];"
+ "li 24, %[gpr_4];"
+ "li 25, %[gpr_4];"
+ "li 26, %[gpr_4];"
+ "li 27, %[gpr_4];"
+ "li 28, %[gpr_4];"
+ "li 29, %[gpr_4];"
+ "li 30, %[gpr_4];"
+ "li 31, %[gpr_4];"
+
+ "lfs 0, 0(%[flt_4]);"
+ "lfs 1, 0(%[flt_4]);"
+ "lfs 2, 0(%[flt_4]);"
+ "lfs 3, 0(%[flt_4]);"
+ "lfs 4, 0(%[flt_4]);"
+ "lfs 5, 0(%[flt_4]);"
+ "lfs 6, 0(%[flt_4]);"
+ "lfs 7, 0(%[flt_4]);"
+ "lfs 8, 0(%[flt_4]);"
+ "lfs 9, 0(%[flt_4]);"
+ "lfs 10, 0(%[flt_4]);"
+ "lfs 11, 0(%[flt_4]);"
+ "lfs 12, 0(%[flt_4]);"
+ "lfs 13, 0(%[flt_4]);"
+ "lfs 14, 0(%[flt_4]);"
+ "lfs 15, 0(%[flt_4]);"
+ "lfs 16, 0(%[flt_4]);"
+ "lfs 17, 0(%[flt_4]);"
+ "lfs 18, 0(%[flt_4]);"
+ "lfs 19, 0(%[flt_4]);"
+ "lfs 20, 0(%[flt_4]);"
+ "lfs 21, 0(%[flt_4]);"
+ "lfs 22, 0(%[flt_4]);"
+ "lfs 23, 0(%[flt_4]);"
+ "lfs 24, 0(%[flt_4]);"
+ "lfs 25, 0(%[flt_4]);"
+ "lfs 26, 0(%[flt_4]);"
+ "lfs 27, 0(%[flt_4]);"
+ "lfs 28, 0(%[flt_4]);"
+ "lfs 29, 0(%[flt_4]);"
+ "lfs 30, 0(%[flt_4]);"
+ "lfs 31, 0(%[flt_4]);"
+ "bl wait_parent;"
+
+ TRESUME
+
+ TEND
+ "li 0, 0;"
+ "ori %[res], 0, 0;"
+ "b 3f;"
+
+ /* Transaction abort handler */
+ "2: ;"
+ "li 0, 1;"
+ "ori %[res], 0, 0;"
+ "mfspr %[texasr], %[sprn_texasr];"
+
+ "3: ;"
+ : [res] "=r" (result), [texasr] "=r" (texasr)
+ : [gpr_1]"i"(GPR_1), [gpr_2]"i"(GPR_2), [gpr_4]"i"(GPR_4),
+ [sprn_texasr] "i" (SPRN_TEXASR), [flt_1] "r" (&a),
+ [flt_2] "r" (&b), [flt_4] "r" (&d)
+ : "memory", "r5", "r6", "r7",
+ "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
+ "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
+ "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31"
+ );
+
+ if (result) {
+ if (!cptr[0])
+ goto trans;
+
+ shmdt((void *)cptr);
+ store_gpr(gpr_buf);
+ store_fpr(fpr_buf);
+
+ if (validate_gpr(gpr_buf, GPR_3))
+ exit(1);
+
+ if (validate_fpr_float(fpr_buf, c))
+ exit(1);
+ exit(0);
+ }
+ shmdt((void *)cptr);
+ exit(1);
+}
+
+int trace_tm_spd_gpr(pid_t child)
+{
+ unsigned long gpr[18];
+ unsigned long fpr[32];
+ int ret;
+
+ ret = start_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_gpr(child, gpr);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_gpr(gpr, GPR_4);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_fpr(child, fpr);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_fpr(fpr, FPR_4_REP);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_ckpt_fpr(child, fpr);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_fpr(fpr, FPR_1_REP);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_ckpt_gpr(child, gpr);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_gpr(gpr, GPR_1);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = write_ckpt_gpr(child, GPR_3);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = write_ckpt_fpr(child, FPR_3_REP);
+ if (ret)
+ return TEST_FAIL;
+
+ pptr[0] = 1;
+ pptr[1] = 1;
+ ret = stop_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ return TEST_PASS;
+}
+
+int ptrace_tm_spd_gpr(void)
+{
+ pid_t pid;
+ int ret, status;
+
+ SKIP_IF(!((long)get_auxv_entry(AT_HWCAP2) & PPC_FEATURE2_HTM));
+ shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 0777|IPC_CREAT);
+ pid = fork();
+ if (pid < 0) {
+ perror("fork() failed");
+ return TEST_FAIL;
+ }
+
+ if (pid == 0)
+ tm_spd_gpr();
+
+ if (pid) {
+ pptr = (int *)shmat(shm_id, NULL, 0);
+ pptr[0] = 0;
+ pptr[1] = 0;
+
+ while (!pptr[2]);
+ ret = trace_tm_spd_gpr(pid);
+ if (ret) {
+ kill(pid, SIGTERM);
+ shmdt((void *)pptr);
+ shmctl(shm_id, IPC_RMID, NULL);
+ return TEST_FAIL;
+ }
+
+ shmdt((void *)pptr);
+
+ ret = wait(&status);
+ shmctl(shm_id, IPC_RMID, NULL);
+ if (ret != pid) {
+ printf("Child's exit status not captured\n");
+ return TEST_FAIL;
+ }
+
+ if (WIFEXITED(status)) {
+ if (WEXITSTATUS(status))
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+ }
+ return TEST_PASS;
+}
+
+int main(int argc, char *argv[])
+{
+ return test_harness(ptrace_tm_spd_gpr, "ptrace_tm_spd_gpr");
+}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 22/30] selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR registers
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (20 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 21/30] selftests/powerpc: Add ptrace tests for GPR/FPR registers in suspended TM wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 23/30] selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR in TM wei.guo.simon
` (7 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch adds ptrace interface test for TAR, PPR, DSCR
registers. This also adds ptrace interface based helper
functions related to TAR, PPR, DSCR register access.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 3 +-
.../testing/selftests/powerpc/ptrace/ptrace-tar.c | 159 ++++++++++++++++++
.../testing/selftests/powerpc/ptrace/ptrace-tar.h | 50 ++++++
tools/testing/selftests/powerpc/ptrace/ptrace.h | 181 +++++++++++++++++++++
4 files changed, 392 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tar.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tar.h
diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
index d0f000c..c794057 100644
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -1,4 +1,5 @@
-TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr ptrace-tm-spd-gpr
+TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr ptrace-tm-spd-gpr \
+ptrace-tar
all: $(TEST_PROGS)
CFLAGS += -m64
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tar.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tar.c
new file mode 100644
index 0000000..e7d5938
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tar.c
@@ -0,0 +1,159 @@
+/*
+ * Ptrace test for TAR, PPR, DSCR registers
+ *
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include "ptrace.h"
+#include "ptrace-tar.h"
+
+/* Tracer and Tracee Shared Data */
+int shm_id;
+volatile int *cptr;
+volatile int *pptr;
+
+void tar(void)
+{
+ unsigned long reg[3];
+ int ret;
+
+ cptr = (int *)shmat(shm_id, NULL, 0);
+ printf("%-30s TAR: %u PPR: %lx DSCR: %u\n",
+ user_write, TAR_1, PPR_1, DSCR_1);
+
+ mtspr(SPRN_TAR, TAR_1);
+ mtspr(SPRN_PPR, PPR_1);
+ mtspr(SPRN_DSCR, DSCR_1);
+
+ cptr[2] = 1;
+
+ /* Wait on parent */
+ while (!cptr[0]);
+
+ reg[0] = mfspr(SPRN_TAR);
+ reg[1] = mfspr(SPRN_PPR);
+ reg[2] = mfspr(SPRN_DSCR);
+
+ printf("%-30s TAR: %lu PPR: %lx DSCR: %lu\n",
+ user_read, reg[0], reg[1], reg[2]);
+
+ /* Unblock the parent now */
+ cptr[1] = 1;
+ shmdt((int *)cptr);
+
+ ret = validate_tar_registers(reg, TAR_2, PPR_2, DSCR_2);
+ if (ret)
+ exit(1);
+ exit(0);
+}
+
+int trace_tar(pid_t child)
+{
+ unsigned long reg[3];
+ int ret;
+
+ ret = start_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_tar_registers(child, reg);
+ if (ret)
+ return TEST_FAIL;
+
+ printf("%-30s TAR: %lu PPR: %lx DSCR: %lu\n",
+ ptrace_read_running, reg[0], reg[1], reg[2]);
+
+ ret = validate_tar_registers(reg, TAR_1, PPR_1, DSCR_1);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = stop_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ return TEST_PASS;
+}
+
+int trace_tar_write(pid_t child)
+{
+ int ret;
+
+ ret = start_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = write_tar_registers(child, TAR_2, PPR_2, DSCR_2);
+ if (ret)
+ return TEST_FAIL;
+
+ printf("%-30s TAR: %u PPR: %lx DSCR: %u\n",
+ ptrace_write_running, TAR_2, PPR_2, DSCR_2);
+
+ ret = stop_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ return TEST_PASS;
+}
+
+int ptrace_tar(void)
+{
+ pid_t pid;
+ int ret, status;
+
+ shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 0777|IPC_CREAT);
+ pid = fork();
+ if (pid < 0) {
+ perror("fork() failed");
+ return TEST_FAIL;
+ }
+
+ if (pid == 0)
+ tar();
+
+ if (pid) {
+ pptr = (int *)shmat(shm_id, NULL, 0);
+ pptr[0] = 0;
+ pptr[1] = 0;
+
+ while (!pptr[2]);
+ ret = trace_tar(pid);
+ if (ret)
+ return ret;
+
+ ret = trace_tar_write(pid);
+ if (ret)
+ return ret;
+
+ /* Unblock the child now */
+ pptr[0] = 1;
+
+ /* Wait on child */
+ while (!pptr[1]);
+
+ shmdt((int *)pptr);
+
+ ret = wait(&status);
+ shmctl(shm_id, IPC_RMID, NULL);
+ if (ret != pid) {
+ printf("Child's exit status not captured\n");
+ return TEST_PASS;
+ }
+
+ if (WIFEXITED(status)) {
+ if (WEXITSTATUS(status))
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+ }
+ return TEST_PASS;
+}
+
+int main(int argc, char *argv[])
+{
+ return test_harness(ptrace_tar, "ptrace_tar");
+}
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tar.h b/tools/testing/selftests/powerpc/ptrace/ptrace-tar.h
new file mode 100644
index 0000000..aed0aac
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tar.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#define TAR_1 10
+#define TAR_2 20
+#define TAR_3 30
+#define TAR_4 40
+#define TAR_5 50
+
+#define DSCR_1 100
+#define DSCR_2 200
+#define DSCR_3 300
+#define DSCR_4 400
+#define DSCR_5 500
+
+#define PPR_1 0x4000000000000 /* or 31,31,31*/
+#define PPR_2 0x8000000000000 /* or 1,1,1 */
+#define PPR_3 0xc000000000000 /* or 6,6,6 */
+#define PPR_4 0x10000000000000 /* or 2,2,2 */
+
+char *user_read = "[User Read (Running)]";
+char *user_write = "[User Write (Running)]";
+char *ptrace_read_running = "[Ptrace Read (Running)]";
+char *ptrace_write_running = "[Ptrace Write (Running)]";
+char *ptrace_read_ckpt = "[Ptrace Read (Checkpointed)]";
+char *ptrace_write_ckpt = "[Ptrace Write (Checkpointed)]";
+
+int validate_tar_registers(unsigned long *reg, unsigned long tar,
+ unsigned long ppr, unsigned long dscr)
+{
+ int match = 1;
+
+ if (reg[0] != tar)
+ match = 0;
+
+ if (reg[1] != ppr)
+ match = 0;
+
+ if (reg[2] != dscr)
+ match = 0;
+
+ if (!match)
+ return TEST_FAIL;
+ return TEST_PASS;
+}
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace.h b/tools/testing/selftests/powerpc/ptrace/ptrace.h
index b6df47f..b9ab0b1 100644
--- a/tools/testing/selftests/powerpc/ptrace/ptrace.h
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace.h
@@ -172,6 +172,187 @@ fail:
return TEST_FAIL;
}
+/* TAR, PPR, DSCR */
+int show_tar_registers(pid_t child, unsigned long *out)
+{
+ struct iovec iov;
+ unsigned long *reg;
+ int ret;
+
+ reg = malloc(sizeof(unsigned long));
+ if (!reg) {
+ perror("malloc() failed");
+ return TEST_FAIL;
+ }
+ iov.iov_base = (u64 *) reg;
+ iov.iov_len = sizeof(unsigned long);
+
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TAR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ goto fail;
+ }
+ if (out)
+ out[0] = *reg;
+
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_PPR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ goto fail;
+ }
+ if (out)
+ out[1] = *reg;
+
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_DSCR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ goto fail;
+ }
+ if (out)
+ out[2] = *reg;
+
+ free(reg);
+ return TEST_PASS;
+fail:
+ free(reg);
+ return TEST_FAIL;
+}
+
+int write_tar_registers(pid_t child, unsigned long tar,
+ unsigned long ppr, unsigned long dscr)
+{
+ struct iovec iov;
+ unsigned long *reg;
+ int ret;
+
+ reg = malloc(sizeof(unsigned long));
+ if (!reg) {
+ perror("malloc() failed");
+ return TEST_FAIL;
+ }
+
+ iov.iov_base = (u64 *) reg;
+ iov.iov_len = sizeof(unsigned long);
+
+ *reg = tar;
+ ret = ptrace(PTRACE_SETREGSET, child, NT_PPC_TAR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_SETREGSET) failed");
+ goto fail;
+ }
+
+ *reg = ppr;
+ ret = ptrace(PTRACE_SETREGSET, child, NT_PPC_PPR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_SETREGSET) failed");
+ goto fail;
+ }
+
+ *reg = dscr;
+ ret = ptrace(PTRACE_SETREGSET, child, NT_PPC_DSCR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_SETREGSET) failed");
+ goto fail;
+ }
+
+ free(reg);
+ return TEST_PASS;
+fail:
+ free(reg);
+ return TEST_FAIL;
+}
+
+int show_tm_checkpointed_state(pid_t child, unsigned long *out)
+{
+ struct iovec iov;
+ unsigned long *reg;
+ int ret;
+
+ reg = malloc(sizeof(unsigned long));
+ if (!reg) {
+ perror("malloc() failed");
+ return TEST_FAIL;
+ }
+
+ iov.iov_base = (u64 *) reg;
+ iov.iov_len = sizeof(unsigned long);
+
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CTAR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ goto fail;
+ }
+ if (out)
+ out[0] = *reg;
+
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CPPR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ goto fail;
+ }
+ if (out)
+ out[1] = *reg;
+
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CDSCR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ goto fail;
+ }
+ if (out)
+ out[2] = *reg;
+
+ free(reg);
+ return TEST_PASS;
+
+fail:
+ free(reg);
+ return TEST_FAIL;
+}
+
+int write_ckpt_tar_registers(pid_t child, unsigned long tar,
+ unsigned long ppr, unsigned long dscr)
+{
+ struct iovec iov;
+ unsigned long *reg;
+ int ret;
+
+ reg = malloc(sizeof(unsigned long));
+ if (!reg) {
+ perror("malloc() failed");
+ return TEST_FAIL;
+ }
+
+ iov.iov_base = (u64 *) reg;
+ iov.iov_len = sizeof(unsigned long);
+
+ *reg = tar;
+ ret = ptrace(PTRACE_SETREGSET, child, NT_PPC_TM_CTAR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ goto fail;
+ }
+
+ *reg = ppr;
+ ret = ptrace(PTRACE_SETREGSET, child, NT_PPC_TM_CPPR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ goto fail;
+ }
+
+ *reg = dscr;
+ ret = ptrace(PTRACE_SETREGSET, child, NT_PPC_TM_CDSCR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ goto fail;
+ }
+
+ free(reg);
+ return TEST_PASS;
+fail:
+ free(reg);
+ return TEST_FAIL;
+}
+
/* FPR */
int show_fpr(pid_t child, unsigned long *fpr)
{
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 23/30] selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR in TM
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (21 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 22/30] selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR registers wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 24/30] selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR in suspended TM wei.guo.simon
` (6 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch adds ptrace interface test for TAR, PPR, DSCR
registers inside TM context. This also adds ptrace
interface based helper functions related to checkpointed
TAR, PPR, DSCR register access.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 2 +-
.../selftests/powerpc/ptrace/ptrace-tm-tar.c | 182 +++++++++++++++++++++
2 files changed, 183 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-tar.c
diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
index c794057..77d7a13 100644
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -1,5 +1,5 @@
TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr ptrace-tm-spd-gpr \
-ptrace-tar
+ptrace-tar ptrace-tm-tar
all: $(TEST_PROGS)
CFLAGS += -m64
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-tar.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-tar.c
new file mode 100644
index 0000000..1fd006c
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-tar.c
@@ -0,0 +1,182 @@
+/*
+ * Ptrace test for TAR, PPR, DSCR registers in the TM context
+ *
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include "ptrace.h"
+#include "ptrace-tar.h"
+
+int shm_id;
+volatile unsigned long *cptr, *pptr;
+
+
+void tm_tar(void)
+{
+ unsigned long result, texasr;
+ unsigned long regs[3];
+ int ret;
+
+ cptr = (unsigned long *)shmat(shm_id, NULL, 0);
+
+trans:
+ cptr[1] = 0;
+ asm __volatile__(
+ "li 4, %[tar_1];"
+ "mtspr %[sprn_tar], 4;" /* TAR_1 */
+ "li 4, %[dscr_1];"
+ "mtspr %[sprn_dscr], 4;" /* DSCR_1 */
+ "or 31,31,31;" /* PPR_1*/
+
+ "1: ;"
+ TBEGIN
+ "beq 2f;"
+
+ "li 4, %[tar_2];"
+ "mtspr %[sprn_tar], 4;" /* TAR_2 */
+ "li 4, %[dscr_2];"
+ "mtspr %[sprn_dscr], 4;" /* DSCR_2 */
+ "or 1,1,1;" /* PPR_2 */
+ TSUSPEND
+ "li 0, 1;"
+ "stw 0, 0(%[cptr1]);"
+ TRESUME
+ "b .;"
+
+ TEND
+ "li 0, 0;"
+ "ori %[res], 0, 0;"
+ "b 3f;"
+
+ /* Transaction abort handler */
+ "2: ;"
+ "li 0, 1;"
+ "ori %[res], 0, 0;"
+ "mfspr %[texasr], %[sprn_texasr];"
+
+ "3: ;"
+
+ : [res] "=r" (result), [texasr] "=r" (texasr)
+ : [sprn_dscr]"i"(SPRN_DSCR), [sprn_tar]"i"(SPRN_TAR),
+ [sprn_ppr]"i"(SPRN_PPR), [sprn_texasr]"i"(SPRN_TEXASR),
+ [tar_1]"i"(TAR_1), [dscr_1]"i"(DSCR_1), [tar_2]"i"(TAR_2),
+ [dscr_2]"i"(DSCR_2), [cptr1] "r" (&cptr[1])
+ : "memory", "r0", "r1", "r3", "r4", "r5", "r6"
+ );
+
+ /* TM failed, analyse */
+ if (result) {
+ if (!cptr[0])
+ goto trans;
+
+ regs[0] = mfspr(SPRN_TAR);
+ regs[1] = mfspr(SPRN_PPR);
+ regs[2] = mfspr(SPRN_DSCR);
+
+ shmdt(&cptr);
+ printf("%-30s TAR: %lu PPR: %lx DSCR: %lu\n",
+ user_read, regs[0], regs[1], regs[2]);
+
+ ret = validate_tar_registers(regs, TAR_4, PPR_4, DSCR_4);
+ if (ret)
+ exit(1);
+ exit(0);
+ }
+ shmdt(&cptr);
+ exit(1);
+}
+
+int trace_tm_tar(pid_t child)
+{
+ unsigned long regs[3];
+ int ret;
+
+ ret = start_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_tar_registers(child, regs);
+ if (ret)
+ return TEST_FAIL;
+
+ printf("%-30s TAR: %lu PPR: %lx DSCR: %lu\n",
+ ptrace_read_running, regs[0], regs[1], regs[2]);
+
+ ret = validate_tar_registers(regs, TAR_2, PPR_2, DSCR_2);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_tm_checkpointed_state(child, regs);
+ if (ret)
+ return TEST_FAIL;
+
+ printf("%-30s TAR: %lu PPR: %lx DSCR: %lu\n",
+ ptrace_read_ckpt, regs[0], regs[1], regs[2]);
+
+ ret = validate_tar_registers(regs, TAR_1, PPR_1, DSCR_1);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = write_ckpt_tar_registers(child, TAR_4, PPR_4, DSCR_4);
+ if (ret)
+ return TEST_FAIL;
+
+ printf("%-30s TAR: %u PPR: %lx DSCR: %u\n",
+ ptrace_write_ckpt, TAR_4, PPR_4, DSCR_4);
+
+ pptr[0] = 1;
+ ret = stop_trace(child);
+ if (ret)
+ return TEST_FAIL;
+ return TEST_PASS;
+}
+
+int ptrace_tm_tar(void)
+{
+ pid_t pid;
+ int ret, status;
+
+ SKIP_IF(!((long)get_auxv_entry(AT_HWCAP2) & PPC_FEATURE2_HTM));
+ shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);
+ pid = fork();
+ if (pid == 0)
+ tm_tar();
+
+ pptr = (unsigned long *)shmat(shm_id, NULL, 0);
+ pptr[0] = 0;
+
+ if (pid) {
+ while (!pptr[1]);
+ ret = trace_tm_tar(pid);
+ if (ret) {
+ kill(pid, SIGTERM);
+ shmdt(&pptr);
+ shmctl(shm_id, IPC_RMID, NULL);
+ return TEST_FAIL;
+ }
+ shmdt(&pptr);
+
+ ret = wait(&status);
+ shmctl(shm_id, IPC_RMID, NULL);
+ if (ret != pid) {
+ printf("Child's exit status not captured\n");
+ return TEST_FAIL;
+ }
+
+ if (WIFEXITED(status)) {
+ if (WEXITSTATUS(status))
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+ }
+ return TEST_PASS;
+}
+
+int main(int argc, char *argv[])
+{
+ return test_harness(ptrace_tm_tar, "ptrace_tm_tar");
+}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 24/30] selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR in suspended TM
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (22 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 23/30] selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR in TM wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 25/30] selftests/powerpc: Add ptrace tests for VSX, VMX registers wei.guo.simon
` (5 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch adds ptrace interface test for TAR, PPR, DSCR
registers inside suspended TM context.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 2 +-
.../selftests/powerpc/ptrace/ptrace-tm-spd-tar.c | 195 +++++++++++++++++++++
2 files changed, 196 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-tar.c
diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
index 77d7a13..2916759 100644
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -1,5 +1,5 @@
TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr ptrace-tm-spd-gpr \
-ptrace-tar ptrace-tm-tar
+ptrace-tar ptrace-tm-tar ptrace-tm-spd-tar
all: $(TEST_PROGS)
CFLAGS += -m64
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-tar.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-tar.c
new file mode 100644
index 0000000..da4c477
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-tar.c
@@ -0,0 +1,195 @@
+/*
+ * Ptrace test for TAR, PPR, DSCR registers in the TM Suspend context
+ *
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include "ptrace.h"
+#include "ptrace-tar.h"
+
+int shm_id;
+volatile int *cptr, *pptr;
+
+__attribute__((used)) void wait_parent(void)
+{
+ cptr[2] = 1;
+ while (!cptr[1]);
+}
+
+void tm_spd_tar(void)
+{
+ unsigned long result, texasr;
+ unsigned long regs[3];
+ int ret;
+
+ cptr = (int *)shmat(shm_id, NULL, 0);
+
+trans:
+ cptr[2] = 0;
+ asm __volatile__(
+ "li 4, %[tar_1];"
+ "mtspr %[sprn_tar], 4;" /* TAR_1 */
+ "li 4, %[dscr_1];"
+ "mtspr %[sprn_dscr], 4;" /* DSCR_1 */
+ "or 31,31,31;" /* PPR_1*/
+
+ "1: ;"
+ TBEGIN
+ "beq 2f;"
+
+ "li 4, %[tar_2];"
+ "mtspr %[sprn_tar], 4;" /* TAR_2 */
+ "li 4, %[dscr_2];"
+ "mtspr %[sprn_dscr], 4;" /* DSCR_2 */
+ "or 1,1,1;" /* PPR_2 */
+
+ TSUSPEND
+ "li 4, %[tar_3];"
+ "mtspr %[sprn_tar], 4;" /* TAR_3 */
+ "li 4, %[dscr_3];"
+ "mtspr %[sprn_dscr], 4;" /* DSCR_3 */
+ "or 6,6,6;" /* PPR_3 */
+ "bl wait_parent;"
+ TRESUME
+
+ TEND
+ "li 0, 0;"
+ "ori %[res], 0, 0;"
+ "b 3f;"
+
+ /* Transaction abort handler */
+ "2: ;"
+ "li 0, 1;"
+ "ori %[res], 0, 0;"
+ "mfspr %[texasr], %[sprn_texasr];"
+
+ "3: ;"
+
+ : [res] "=r" (result), [texasr] "=r" (texasr)
+ : [val] "r" (cptr[1]), [sprn_dscr]"i"(SPRN_DSCR),
+ [sprn_tar]"i"(SPRN_TAR), [sprn_ppr]"i"(SPRN_PPR),
+ [sprn_texasr]"i"(SPRN_TEXASR), [tar_1]"i"(TAR_1),
+ [dscr_1]"i"(DSCR_1), [tar_2]"i"(TAR_2), [dscr_2]"i"(DSCR_2),
+ [tar_3]"i"(TAR_3), [dscr_3]"i"(DSCR_3)
+ : "memory", "r0", "r1", "r3", "r4", "r5", "r6"
+ );
+
+ /* TM failed, analyse */
+ if (result) {
+ if (!cptr[0])
+ goto trans;
+
+ regs[0] = mfspr(SPRN_TAR);
+ regs[1] = mfspr(SPRN_PPR);
+ regs[2] = mfspr(SPRN_DSCR);
+
+ shmdt(&cptr);
+ printf("%-30s TAR: %lu PPR: %lx DSCR: %lu\n",
+ user_read, regs[0], regs[1], regs[2]);
+
+ ret = validate_tar_registers(regs, TAR_4, PPR_4, DSCR_4);
+ if (ret)
+ exit(1);
+ exit(0);
+ }
+ shmdt(&cptr);
+ exit(1);
+}
+
+int trace_tm_spd_tar(pid_t child)
+{
+ unsigned long regs[3];
+ int ret;
+
+ ret = start_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_tar_registers(child, regs);
+ if (ret)
+ return TEST_FAIL;
+
+ printf("%-30s TAR: %lu PPR: %lx DSCR: %lu\n",
+ ptrace_read_running, regs[0], regs[1], regs[2]);
+
+ ret = validate_tar_registers(regs, TAR_3, PPR_3, DSCR_3);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_tm_checkpointed_state(child, regs);
+ if (ret)
+ return TEST_FAIL;
+
+ printf("%-30s TAR: %lu PPR: %lx DSCR: %lu\n",
+ ptrace_read_ckpt, regs[0], regs[1], regs[2]);
+
+ ret = validate_tar_registers(regs, TAR_1, PPR_1, DSCR_1);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = write_ckpt_tar_registers(child, TAR_4, PPR_4, DSCR_4);
+ if (ret)
+ return TEST_FAIL;
+
+ printf("%-30s TAR: %u PPR: %lx DSCR: %u\n",
+ ptrace_write_ckpt, TAR_4, PPR_4, DSCR_4);
+
+ pptr[0] = 1;
+ pptr[1] = 1;
+ ret = stop_trace(child);
+ if (ret)
+ return TEST_FAIL;
+ return TEST_PASS;
+}
+
+int ptrace_tm_spd_tar(void)
+{
+ pid_t pid;
+ int ret, status;
+
+ SKIP_IF(!((long)get_auxv_entry(AT_HWCAP2) & PPC_FEATURE2_HTM));
+ shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 0777|IPC_CREAT);
+ pid = fork();
+ if (pid == 0)
+ tm_spd_tar();
+
+ pptr = (int *)shmat(shm_id, NULL, 0);
+ pptr[0] = 0;
+ pptr[1] = 0;
+
+ if (pid) {
+ while (!pptr[2]);
+ ret = trace_tm_spd_tar(pid);
+ if (ret) {
+ kill(pid, SIGTERM);
+ shmdt(&pptr);
+ shmctl(shm_id, IPC_RMID, NULL);
+ return TEST_FAIL;
+ }
+
+ shmdt(&pptr);
+
+ ret = wait(&status);
+ shmctl(shm_id, IPC_RMID, NULL);
+ if (ret != pid) {
+ printf("Child's exit status not captured\n");
+ return TEST_FAIL;
+ }
+
+ if (WIFEXITED(status)) {
+ if (WEXITSTATUS(status))
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+ }
+ return TEST_PASS;
+}
+
+int main(int argc, char *argv[])
+{
+ return test_harness(ptrace_tm_spd_tar, "ptrace_tm_spd_tar");
+}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 25/30] selftests/powerpc: Add ptrace tests for VSX, VMX registers
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (23 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 24/30] selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR in suspended TM wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 26/30] selftests/powerpc: Add ptrace tests for VSX, VMX registers in TM wei.guo.simon
` (4 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch adds ptrace interface test for VSX, VMX registers.
This also adds ptrace interface based helper functions related
to VSX, VMX registers access. This also adds some assembly
helper functions related to VSX and VMX registers.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 2 +-
.../testing/selftests/powerpc/ptrace/ptrace-vsx.c | 143 +++++++++++
.../testing/selftests/powerpc/ptrace/ptrace-vsx.h | 121 ++++++++++
tools/testing/selftests/powerpc/ptrace/ptrace.S | 265 +++++++++++++++++++++
tools/testing/selftests/powerpc/ptrace/ptrace.h | 119 +++++++++
5 files changed, 649 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-vsx.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-vsx.h
diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
index 2916759..e3d9ceb 100644
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -1,5 +1,5 @@
TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr ptrace-tm-spd-gpr \
-ptrace-tar ptrace-tm-tar ptrace-tm-spd-tar
+ptrace-tar ptrace-tm-tar ptrace-tm-spd-tar ptrace-vsx
all: $(TEST_PROGS)
CFLAGS += -m64
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-vsx.c b/tools/testing/selftests/powerpc/ptrace/ptrace-vsx.c
new file mode 100644
index 0000000..be771e9
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-vsx.c
@@ -0,0 +1,143 @@
+/*
+ * Ptrace test for VMX/VSX registers
+ *
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include "ptrace.h"
+#include "ptrace-vsx.h"
+
+/* Tracer and Tracee Shared Data */
+int shm_id;
+volatile int *cptr, *pptr;
+
+void loadvsx(void *p, int tmp);
+void storevsx(void *p, int tmp);
+
+unsigned long fp_load[VEC_MAX];
+unsigned long fp_load_new[VEC_MAX];
+unsigned long fp_store[VEC_MAX];
+
+void vsx(void)
+{
+ int ret;
+
+ cptr = (int *)shmat(shm_id, NULL, 0);
+ loadvsx(fp_load, 0);
+ cptr[1] = 1;
+
+ while (!cptr[0]);
+ shmdt((void *) cptr);
+
+ storevsx(fp_store, 0);
+ ret = compare_vsx_vmx(fp_store, fp_load_new);
+ if (ret)
+ exit(1);
+ exit(0);
+}
+
+int trace_vsx(pid_t child)
+{
+ unsigned long vsx[VSX_MAX];
+ unsigned long vmx[VMX_MAX + 2][2];
+ int ret;
+
+ ret = start_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_vsx(child, vsx);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_vsx(vsx, fp_load);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_vmx(child, vmx);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_vmx(vmx, fp_load);
+ if (ret)
+ return TEST_FAIL;
+
+ memset(vsx, 0, sizeof(vsx));
+ memset(vmx, 0, sizeof(vmx));
+ load_vsx_vmx(fp_load_new, vsx, vmx);
+
+ ret = write_vsx(child, vsx);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = write_vmx(child, vmx);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = stop_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ return TEST_PASS;
+}
+
+int ptrace_vsx(void)
+{
+ pid_t pid;
+ int ret, status, i;
+
+ shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);
+
+ for (i = 0; i < VEC_MAX; i++)
+ fp_load[i] = i + rand();
+
+ for (i = 0; i < VEC_MAX; i++)
+ fp_load_new[i] = i + 2 * rand();
+
+ pid = fork();
+ if (pid < 0) {
+ perror("fork() failed");
+ return TEST_FAIL;
+ }
+
+ if (pid == 0)
+ vsx();
+
+ if (pid) {
+ pptr = (int *)shmat(shm_id, NULL, 0);
+ while (!pptr[1]);
+
+ ret = trace_vsx(pid);
+ if (ret) {
+ kill(pid, SIGTERM);
+ shmdt((void *)pptr);
+ shmctl(shm_id, IPC_RMID, NULL);
+ return TEST_FAIL;
+ }
+
+ pptr[0] = 1;
+ shmdt((void *)pptr);
+
+ ret = wait(&status);
+ shmctl(shm_id, IPC_RMID, NULL);
+ if (ret != pid) {
+ printf("Child's exit status not captured\n");
+ return TEST_FAIL;
+ }
+
+ if (WIFEXITED(status)) {
+ if (WEXITSTATUS(status))
+ return TEST_FAIL;
+ }
+ }
+ return TEST_PASS;
+}
+
+int main(int argc, char *argv[])
+{
+ return test_harness(ptrace_vsx, "ptrace_vsx");
+}
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-vsx.h b/tools/testing/selftests/powerpc/ptrace/ptrace-vsx.h
new file mode 100644
index 0000000..3eab1a4
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-vsx.h
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#define VEC_MAX 128
+#define VSX_MAX 32
+#define VMX_MAX 32
+
+/*
+ * unsigned long vsx[32]
+ * unsigned long load[128]
+ */
+int validate_vsx(unsigned long *vsx, unsigned long *load)
+{
+ int i;
+
+ for (i = 0; i < VSX_MAX; i++) {
+ if (vsx[i] != load[2 * i + 1]) {
+ printf("vsx[%d]: %lx load[%d] %lx\n",
+ i, vsx[i], 2 * i + 1, load[2 * i + 1]);
+ return TEST_FAIL;
+ }
+ }
+ return TEST_PASS;
+}
+
+/*
+ * unsigned long vmx[32][2]
+ * unsigned long load[128]
+ */
+int validate_vmx(unsigned long vmx[][2], unsigned long *load)
+{
+ int i;
+
+ for (i = 0; i < VMX_MAX; i++) {
+ #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+ if ((vmx[i][0] != load[64 + 2 * i]) ||
+ (vmx[i][1] != load[65 + 2 * i])) {
+ printf("vmx[%d][0]: %lx load[%d] %lx\n",
+ i, vmx[i][0], 64 + 2 * i,
+ load[64 + 2 * i]);
+ printf("vmx[%d][1]: %lx load[%d] %lx\n",
+ i, vmx[i][1], 65 + 2 * i,
+ load[65 + 2 * i]);
+ return TEST_FAIL;
+ }
+ #else /* In LE each value pair is stored in an alternate manner */
+ if ((vmx[i][0] != load[65 + 2 * i]) ||
+ (vmx[i][1] != load[64 + 2 * i])) {
+ printf("vmx[%d][0]: %lx load[%d] %lx\n",
+ i, vmx[i][0], 65 + 2 * i,
+ load[65 + 2 * i]);
+ printf("vmx[%d][1]: %lx load[%d] %lx\n",
+ i, vmx[i][1], 64 + 2 * i,
+ load[64 + 2 * i]);
+ return TEST_FAIL;
+ }
+ #endif
+ }
+ return TEST_PASS;
+}
+
+/*
+ * unsigned long store[128]
+ * unsigned long load[128]
+ */
+int compare_vsx_vmx(unsigned long *store, unsigned long *load)
+{
+ int i;
+
+ for (i = 0; i < VSX_MAX; i++) {
+ if (store[1 + 2 * i] != load[1 + 2 * i]) {
+ printf("store[%d]: %lx load[%d] %lx\n",
+ 1 + 2 * i, store[i],
+ 1 + 2 * i, load[i]);
+ return TEST_FAIL;
+ }
+ }
+
+ #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+ for (i = 64; i < VEC_MAX; i++) {
+ if (store[i] != load[i]) {
+ printf("store[%d]: %lx load[%d] %lx\n",
+ i, store[i], i, load[i]);
+ return TEST_FAIL;
+ }
+ }
+ #else /* In LE each value pair is stored in an alternate manner */
+ for (i = 64; i < VEC_MAX; i++) {
+ if (!(i % 2) && (store[i] != load[i+1])) {
+ printf("store[%d]: %lx load[%d] %lx\n",
+ i, store[i], i+1, load[i+1]);
+ return TEST_FAIL;
+ }
+ if ((i % 2) && (store[i] != load[i-1])) {
+ printf("here store[%d]: %lx load[%d] %lx\n",
+ i, store[i], i-1, load[i-1]);
+ return TEST_FAIL;
+ }
+ }
+ #endif
+ return TEST_PASS;
+}
+
+void load_vsx_vmx(unsigned long *load, unsigned long *vsx,
+ unsigned long vmx[][2])
+{
+ int i;
+
+ for (i = 0; i < VSX_MAX; i++)
+ vsx[i] = load[1 + 2 * i];
+
+ for (i = 0; i < VMX_MAX; i++) {
+ vmx[i][0] = load[64 + 2 * i];
+ vmx[i][1] = load[65 + 2 * i];
+ }
+}
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace.S b/tools/testing/selftests/powerpc/ptrace/ptrace.S
index 193beea..2407792 100644
--- a/tools/testing/selftests/powerpc/ptrace/ptrace.S
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace.S
@@ -129,3 +129,268 @@ FUNC_START(store_fpr)
stfs 31, 31*4(3)
blr
FUNC_END(store_fpr)
+
+/* VMX/VSX registers - unsigned long buf[128] */
+FUNC_START(loadvsx)
+ lis 4, 0
+ LXVD2X (0,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (1,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (2,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (3,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (4,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (5,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (6,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (7,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (8,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (9,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (10,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (11,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (12,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (13,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (14,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (15,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (16,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (17,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (18,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (19,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (20,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (21,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (22,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (23,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (24,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (25,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (26,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (27,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (28,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (29,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (30,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (31,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (32,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (33,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (34,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (35,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (36,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (37,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (38,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (39,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (40,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (41,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (42,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (43,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (44,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (45,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (46,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (47,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (48,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (49,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (50,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (51,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (52,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (53,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (54,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (55,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (56,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (57,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (58,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (59,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (60,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (61,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (62,(4),(3))
+ addi 4, 4, 16
+ LXVD2X (63,(4),(3))
+ blr
+FUNC_END(loadvsx)
+
+FUNC_START(storevsx)
+ lis 4, 0
+ STXVD2X (0,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (1,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (2,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (3,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (4,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (5,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (6,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (7,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (8,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (9,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (10,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (11,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (12,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (13,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (14,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (15,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (16,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (17,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (18,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (19,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (20,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (21,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (22,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (23,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (24,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (25,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (26,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (27,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (28,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (29,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (30,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (31,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (32,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (33,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (34,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (35,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (36,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (37,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (38,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (39,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (40,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (41,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (42,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (43,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (44,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (45,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (46,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (47,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (48,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (49,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (50,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (51,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (52,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (53,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (54,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (55,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (56,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (57,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (58,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (59,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (60,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (61,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (62,(4),(3))
+ addi 4, 4, 16
+ STXVD2X (63,(4),(3))
+ blr
+FUNC_END(storevsx)
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace.h b/tools/testing/selftests/powerpc/ptrace/ptrace.h
index b9ab0b1..442a9a0 100644
--- a/tools/testing/selftests/powerpc/ptrace/ptrace.h
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace.h
@@ -561,6 +561,125 @@ int write_ckpt_gpr(pid_t child, unsigned long val)
return TEST_PASS;
}
+/* VMX */
+int show_vmx(pid_t child, unsigned long vmx[][2])
+{
+ int ret;
+
+ ret = ptrace(PTRACE_GETVRREGS, child, 0, vmx);
+ if (ret) {
+ perror("ptrace(PTRACE_GETVRREGS) failed");
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+}
+
+int show_vmx_ckpt(pid_t child, unsigned long vmx[][2])
+{
+ unsigned long regs[34][2];
+ struct iovec iov;
+ int ret;
+
+ iov.iov_base = (u64 *) regs;
+ iov.iov_len = sizeof(regs);
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CVMX, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET, NT_PPC_TM_CVMX) failed");
+ return TEST_FAIL;
+ }
+ memcpy(vmx, regs, sizeof(regs));
+ return TEST_PASS;
+}
+
+
+int write_vmx(pid_t child, unsigned long vmx[][2])
+{
+ int ret;
+
+ ret = ptrace(PTRACE_SETVRREGS, child, 0, vmx);
+ if (ret) {
+ perror("ptrace(PTRACE_SETVRREGS) failed");
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+}
+
+int write_vmx_ckpt(pid_t child, unsigned long vmx[][2])
+{
+ unsigned long regs[34][2];
+ struct iovec iov;
+ int ret;
+
+ memcpy(regs, vmx, sizeof(regs));
+ iov.iov_base = (u64 *) regs;
+ iov.iov_len = sizeof(regs);
+ ret = ptrace(PTRACE_SETREGSET, child, NT_PPC_TM_CVMX, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_SETREGSET, NT_PPC_TM_CVMX) failed");
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+}
+
+/* VSX */
+int show_vsx(pid_t child, unsigned long *vsx)
+{
+ int ret;
+
+ ret = ptrace(PTRACE_GETVSRREGS, child, 0, vsx);
+ if (ret) {
+ perror("ptrace(PTRACE_GETVSRREGS) failed");
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+}
+
+int show_vsx_ckpt(pid_t child, unsigned long *vsx)
+{
+ unsigned long regs[32];
+ struct iovec iov;
+ int ret;
+
+ iov.iov_base = (u64 *) regs;
+ iov.iov_len = sizeof(regs);
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CVSX, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET, NT_PPC_TM_CVSX) failed");
+ return TEST_FAIL;
+ }
+ memcpy(vsx, regs, sizeof(regs));
+ return TEST_PASS;
+}
+
+int write_vsx(pid_t child, unsigned long *vsx)
+{
+ int ret;
+
+ ret = ptrace(PTRACE_SETVSRREGS, child, 0, vsx);
+ if (ret) {
+ perror("ptrace(PTRACE_SETVSRREGS) failed");
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+}
+
+int write_vsx_ckpt(pid_t child, unsigned long *vsx)
+{
+ unsigned long regs[32];
+ struct iovec iov;
+ int ret;
+
+ memcpy(regs, vsx, sizeof(regs));
+ iov.iov_base = (u64 *) regs;
+ iov.iov_len = sizeof(regs);
+ ret = ptrace(PTRACE_SETREGSET, child, NT_PPC_TM_CVSX, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_SETREGSET, NT_PPC_TM_CVSX) failed");
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+}
+
/* Analyse TEXASR after TM failure */
inline unsigned long get_tfiar(void)
{
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 26/30] selftests/powerpc: Add ptrace tests for VSX, VMX registers in TM
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (24 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 25/30] selftests/powerpc: Add ptrace tests for VSX, VMX registers wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 27/30] selftests/powerpc: Add ptrace tests for VSX, VMX registers in suspended TM wei.guo.simon
` (3 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch adds ptrace interface test for VSX, VMX registers
inside TM context. This also adds ptrace interface based helper
functions related to chckpointed VSX, VMX registers access.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 3 +-
.../selftests/powerpc/ptrace/ptrace-tm-vsx.c | 209 +++++++++++++++++++++
2 files changed, 211 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-vsx.c
diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
index e3d9ceb..1b07649 100644
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -1,5 +1,6 @@
TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr ptrace-tm-spd-gpr \
-ptrace-tar ptrace-tm-tar ptrace-tm-spd-tar ptrace-vsx
+ptrace-tar ptrace-tm-tar ptrace-tm-spd-tar ptrace-vsx ptrace-tm-vsx
+
all: $(TEST_PROGS)
CFLAGS += -m64
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-vsx.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-vsx.c
new file mode 100644
index 0000000..d63f45d
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-vsx.c
@@ -0,0 +1,209 @@
+/*
+ * Ptrace test for VMX/VSX registers in the TM context
+ *
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include "ptrace.h"
+#include "ptrace-vsx.h"
+
+int shm_id;
+volatile unsigned long *cptr, *pptr;
+
+void loadvsx(void *p, int tmp);
+void storevsx(void *p, int tmp);
+
+unsigned long fp_load[VEC_MAX];
+unsigned long fp_store[VEC_MAX];
+unsigned long fp_load_ckpt[VEC_MAX];
+unsigned long fp_load_ckpt_new[VEC_MAX];
+
+__attribute__((used)) void load_vsx(void)
+{
+ loadvsx(fp_load, 0);
+}
+
+__attribute__((used)) void load_vsx_ckpt(void)
+{
+ loadvsx(fp_load_ckpt, 0);
+}
+
+void tm_vsx(void)
+{
+ unsigned long result, texasr;
+ int ret;
+
+ cptr = (unsigned long *)shmat(shm_id, NULL, 0);
+
+trans:
+ cptr[1] = 0;
+ asm __volatile__(
+ "bl load_vsx_ckpt;"
+
+ "1: ;"
+ TBEGIN
+ "beq 2f;"
+
+ "bl load_vsx;"
+ TSUSPEND
+ "li 7, 1;"
+ "stw 7, 0(%[cptr1]);"
+ TRESUME
+ "b .;"
+
+ TEND
+ "li 0, 0;"
+ "ori %[res], 0, 0;"
+ "b 3f;"
+
+ "2: ;"
+ "li 0, 1;"
+ "ori %[res], 0, 0;"
+ "mfspr %[texasr], %[sprn_texasr];"
+
+ "3: ;"
+ : [res] "=r" (result), [texasr] "=r" (texasr)
+ : [fp_load] "r" (fp_load), [fp_load_ckpt] "r" (fp_load_ckpt),
+ [sprn_texasr] "i" (SPRN_TEXASR), [cptr1] "r" (&cptr[1])
+ : "memory", "r0", "r1", "r2", "r3", "r4",
+ "r7", "r8", "r9", "r10", "r11"
+ );
+
+ if (result) {
+ if (!cptr[0])
+ goto trans;
+
+ shmdt((void *)cptr);
+ storevsx(fp_store, 0);
+ ret = compare_vsx_vmx(fp_store, fp_load_ckpt_new);
+ if (ret)
+ exit(1);
+ exit(0);
+ }
+ shmdt((void *)cptr);
+ exit(1);
+}
+
+int trace_tm_vsx(pid_t child)
+{
+ unsigned long vsx[VSX_MAX];
+ unsigned long vmx[VMX_MAX + 2][2];
+ int ret;
+
+ ret = start_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_vsx(child, vsx);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_vsx(vsx, fp_load);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_vmx(child, vmx);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_vmx(vmx, fp_load);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_vsx_ckpt(child, vsx);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_vsx(vsx, fp_load_ckpt);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_vmx_ckpt(child, vmx);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_vmx(vmx, fp_load_ckpt);
+ if (ret)
+ return TEST_FAIL;
+
+ memset(vsx, 0, sizeof(vsx));
+ memset(vmx, 0, sizeof(vmx));
+
+ load_vsx_vmx(fp_load_ckpt_new, vsx, vmx);
+
+ ret = write_vsx_ckpt(child, vsx);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = write_vmx_ckpt(child, vmx);
+ if (ret)
+ return TEST_FAIL;
+
+ pptr[0] = 1;
+ ret = stop_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ return TEST_PASS;
+}
+
+int ptrace_tm_vsx(void)
+{
+ pid_t pid;
+ int ret, status, i;
+
+ SKIP_IF(!((long)get_auxv_entry(AT_HWCAP2) & PPC_FEATURE2_HTM));
+ shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);
+
+ for (i = 0; i < 128; i++) {
+ fp_load[i] = 1 + rand();
+ fp_load_ckpt[i] = 1 + 2 * rand();
+ fp_load_ckpt_new[i] = 1 + 3 * rand();
+ }
+
+ pid = fork();
+ if (pid < 0) {
+ perror("fork() failed");
+ return TEST_FAIL;
+ }
+
+ if (pid == 0)
+ tm_vsx();
+
+ if (pid) {
+ pptr = (unsigned long *)shmat(shm_id, NULL, 0);
+ while (!pptr[1]);
+
+ ret = trace_tm_vsx(pid);
+ if (ret) {
+ kill(pid, SIGKILL);
+ shmdt((void *)pptr);
+ shmctl(shm_id, IPC_RMID, NULL);
+ return TEST_FAIL;
+ }
+
+ shmdt((void *)pptr);
+ ret = wait(&status);
+ shmctl(shm_id, IPC_RMID, NULL);
+ if (ret != pid) {
+ printf("Child's exit status not captured\n");
+ return TEST_FAIL;
+ }
+
+ if (WIFEXITED(status)) {
+ if (WEXITSTATUS(status))
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+ }
+ return TEST_PASS;
+}
+
+int main(int argc, char *argv[])
+{
+ return test_harness(ptrace_tm_vsx, "ptrace_tm_vsx");
+}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 27/30] selftests/powerpc: Add ptrace tests for VSX, VMX registers in suspended TM
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (25 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 26/30] selftests/powerpc: Add ptrace tests for VSX, VMX registers in TM wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 28/30] selftests/powerpc: Add ptrace tests for TM SPR registers wei.guo.simon
` (2 subsequent siblings)
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch adds ptrace interface test for VSX, VMX registers
inside suspended TM context.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 3 +-
.../selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c | 222 +++++++++++++++++++++
2 files changed, 224 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c
diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
index 1b07649..797840a 100644
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -1,5 +1,6 @@
TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr ptrace-tm-spd-gpr \
-ptrace-tar ptrace-tm-tar ptrace-tm-spd-tar ptrace-vsx ptrace-tm-vsx
+ptrace-tar ptrace-tm-tar ptrace-tm-spd-tar ptrace-vsx ptrace-tm-vsx \
+ptrace-tm-spd-vsx
all: $(TEST_PROGS)
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c
new file mode 100644
index 0000000..dbb0cc1
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c
@@ -0,0 +1,222 @@
+/*
+ * Ptrace test for VMX/VSX registers in the TM Suspend context
+ *
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include "ptrace.h"
+#include "ptrace-vsx.h"
+
+int shm_id;
+volatile int *cptr, *pptr;
+
+void loadvsx(void *p, int tmp);
+void storevsx(void *p, int tmp);
+
+unsigned long fp_load[VEC_MAX];
+unsigned long fp_load_new[VEC_MAX];
+unsigned long fp_store[VEC_MAX];
+unsigned long fp_load_ckpt[VEC_MAX];
+unsigned long fp_load_ckpt_new[VEC_MAX];
+
+__attribute__((used)) void load_vsx(void)
+{
+ loadvsx(fp_load, 0);
+}
+
+__attribute__((used)) void load_vsx_new(void)
+{
+ loadvsx(fp_load_new, 0);
+}
+
+__attribute__((used)) void load_vsx_ckpt(void)
+{
+ loadvsx(fp_load_ckpt, 0);
+}
+
+__attribute__((used)) void wait_parent(void)
+{
+ cptr[2] = 1;
+ while (!cptr[1]);
+}
+
+void tm_spd_vsx(void)
+{
+ unsigned long result, texasr;
+ int ret;
+
+ cptr = (int *)shmat(shm_id, NULL, 0);
+
+trans:
+ cptr[2] = 0;
+ asm __volatile__(
+ "bl load_vsx_ckpt;"
+
+ "1: ;"
+ TBEGIN
+ "beq 2f;"
+
+ "bl load_vsx_new;"
+ TSUSPEND
+ "bl load_vsx;"
+ "bl wait_parent;"
+ TRESUME
+
+ TEND
+ "li 0, 0;"
+ "ori %[res], 0, 0;"
+ "b 3f;"
+
+ "2: ;"
+ "li 0, 1;"
+ "ori %[res], 0, 0;"
+ "mfspr %[texasr], %[sprn_texasr];"
+
+ "3: ;"
+ : [res] "=r" (result), [texasr] "=r" (texasr)
+ : [fp_load] "r" (fp_load), [fp_load_ckpt] "r" (fp_load_ckpt),
+ [sprn_texasr] "i" (SPRN_TEXASR)
+ : "memory", "r0", "r1", "r2", "r3", "r4",
+ "r8", "r9", "r10", "r11"
+ );
+
+ if (result) {
+ if (!cptr[0])
+ goto trans;
+ shmdt((void *)cptr);
+
+ storevsx(fp_store, 0);
+ ret = compare_vsx_vmx(fp_store, fp_load_ckpt_new);
+ if (ret)
+ exit(1);
+ exit(0);
+ }
+ shmdt((void *)cptr);
+ exit(1);
+}
+
+int trace_tm_spd_vsx(pid_t child)
+{
+ unsigned long vsx[VSX_MAX];
+ unsigned long vmx[VMX_MAX + 2][2];
+ int ret;
+
+ ret = start_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_vsx(child, vsx);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_vsx(vsx, fp_load);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_vmx(child, vmx);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_vmx(vmx, fp_load);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_vsx_ckpt(child, vsx);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_vsx(vsx, fp_load_ckpt);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_vmx_ckpt(child, vmx);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_vmx(vmx, fp_load_ckpt);
+ if (ret)
+ return TEST_FAIL;
+
+ memset(vsx, 0, sizeof(vsx));
+ memset(vmx, 0, sizeof(vmx));
+
+ load_vsx_vmx(fp_load_ckpt_new, vsx, vmx);
+
+ ret = write_vsx_ckpt(child, vsx);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = write_vmx_ckpt(child, vmx);
+ if (ret)
+ return TEST_FAIL;
+
+ pptr[0] = 1;
+ pptr[1] = 1;
+ ret = stop_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ return TEST_PASS;
+}
+
+int ptrace_tm_spd_vsx(void)
+{
+ pid_t pid;
+ int ret, status, i;
+
+ SKIP_IF(!((long)get_auxv_entry(AT_HWCAP2) & PPC_FEATURE2_HTM));
+ shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 0777|IPC_CREAT);
+
+ for (i = 0; i < 128; i++) {
+ fp_load[i] = 1 + rand();
+ fp_load_new[i] = 1 + 2 * rand();
+ fp_load_ckpt[i] = 1 + 3 * rand();
+ fp_load_ckpt_new[i] = 1 + 4 * rand();
+ }
+
+ pid = fork();
+ if (pid < 0) {
+ perror("fork() failed");
+ return TEST_FAIL;
+ }
+
+ if (pid == 0)
+ tm_spd_vsx();
+
+ if (pid) {
+ pptr = (int *)shmat(shm_id, NULL, 0);
+ while (!pptr[2]);
+
+ ret = trace_tm_spd_vsx(pid);
+ if (ret) {
+ kill(pid, SIGKILL);
+ shmdt((void *)pptr);
+ shmctl(shm_id, IPC_RMID, NULL);
+ return TEST_FAIL;
+ }
+
+ shmdt((void *)pptr);
+ ret = wait(&status);
+ shmctl(shm_id, IPC_RMID, NULL);
+ if (ret != pid) {
+ printf("Child's exit status not captured\n");
+ return TEST_FAIL;
+ }
+
+ if (WIFEXITED(status)) {
+ if (WEXITSTATUS(status))
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+ }
+ return TEST_PASS;
+}
+
+int main(int argc, char *argv[])
+{
+ return test_harness(ptrace_tm_spd_vsx, "ptrace_tm_spd_vsx");
+}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 28/30] selftests/powerpc: Add ptrace tests for TM SPR registers
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (26 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 27/30] selftests/powerpc: Add ptrace tests for VSX, VMX registers in suspended TM wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 29/30] selftests/powerpc: Add .gitignore file for ptrace executables wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 30/30] selftests/powerpc: Fix a build issue wei.guo.simon
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch adds ptrace interface test for TM SPR registers. This
also adds ptrace interface based helper functions related to TM
SPR registers access.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 3 +-
.../selftests/powerpc/ptrace/ptrace-tm-spr.c | 186 +++++++++++++++++++++
tools/testing/selftests/powerpc/ptrace/ptrace.h | 35 ++++
3 files changed, 223 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-spr.c
diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
index 797840a..f34670e 100644
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -1,7 +1,8 @@
TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr ptrace-tm-spd-gpr \
ptrace-tar ptrace-tm-tar ptrace-tm-spd-tar ptrace-vsx ptrace-tm-vsx \
-ptrace-tm-spd-vsx
+ptrace-tm-spd-vsx ptrace-tm-spr
+include ../../lib.mk
all: $(TEST_PROGS)
CFLAGS += -m64
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spr.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spr.c
new file mode 100644
index 0000000..a4f361e
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spr.c
@@ -0,0 +1,186 @@
+/*
+ * Ptrace test TM SPR registers
+ *
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include "ptrace.h"
+
+/* Tracee and tracer shared data */
+struct shared {
+ int flag;
+ struct tm_spr_regs regs;
+};
+unsigned long tfhar;
+
+int shm_id;
+volatile struct shared *cptr, *pptr;
+
+int shm_id1;
+volatile int *cptr1, *pptr1;
+
+#define TM_SCHED 0xde0000018c000001
+#define TM_KVM_SCHED 0xe0000001ac000001
+
+int validate_tm_spr(struct tm_spr_regs *regs)
+{
+ if (regs->tm_tfhar != tfhar )
+ return TEST_FAIL;
+
+ if ((regs->tm_texasr != TM_SCHED) && (regs->tm_texasr != TM_KVM_SCHED))
+ return TEST_FAIL;
+
+ if ((regs->tm_texasr == TM_KVM_SCHED) && (regs->tm_tfiar != 0))
+ return TEST_FAIL;
+
+ return TEST_PASS;
+}
+
+void tm_spr(void)
+{
+ unsigned long result, texasr;
+ int ret;
+
+ cptr = (struct shared *)shmat(shm_id, NULL, 0);
+ cptr1 = (int *)shmat(shm_id1, NULL, 0);
+
+trans:
+ cptr1[0] = 0;
+ asm __volatile__(
+ "1: ;"
+ /* TM failover handler should follow TBEGIN */
+ "mflr 31;"
+ "bl 4f;" /* $ = TFHAR - 12 */
+ "4: ;"
+ "mflr %[tfhar];"
+ "mtlr 31;"
+
+ TBEGIN
+ "beq 2f;"
+
+ TSUSPEND
+ "li 8, 1;"
+ "sth 8, 0(%[cptr1]);"
+ TRESUME
+ "b .;"
+
+ TEND
+ "li 0, 0;"
+ "ori %[res], 0, 0;"
+ "b 3f;"
+
+ "2: ;"
+
+ "li 0, 1;"
+ "ori %[res], 0, 0;"
+ "mfspr %[texasr], %[sprn_texasr];"
+
+ "3: ;"
+ : [tfhar] "=r" (tfhar), [res] "=r" (result),
+ [texasr] "=r" (texasr), [cptr1] "=r" (cptr1)
+ : [sprn_texasr] "i" (SPRN_TEXASR)
+ : "memory", "r0", "r1", "r2", "r3", "r4",
+ "r8", "r9", "r10", "r11", "r31"
+ );
+
+ /* There are 2 32bit instructions before tbegin. */
+ tfhar += 12;
+
+ if (result) {
+ if (!cptr->flag)
+ goto trans;
+
+ ret = validate_tm_spr((struct tm_spr_regs *)&cptr->regs);
+ shmdt((void *)cptr);
+ shmdt((void *)cptr1);
+ if (ret)
+ exit(1);
+ exit(0);
+ }
+ shmdt((void *)cptr);
+ shmdt((void *)cptr1);
+ exit(1);
+}
+
+int trace_tm_spr(pid_t child)
+{
+ int ret;
+
+ ret = start_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_tm_spr(child, (struct tm_spr_regs *)&pptr->regs);
+ if (ret)
+ return TEST_FAIL;
+
+ printf("TFHAR: %lx TEXASR: %lx TFIAR: %lx\n", pptr->regs.tm_tfhar,
+ pptr->regs.tm_texasr, pptr->regs.tm_tfiar);
+
+ pptr->flag = 1;
+ ret = stop_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ return TEST_PASS;
+}
+
+int ptrace_tm_spr(void)
+{
+ pid_t pid;
+ int ret, status;
+
+ SKIP_IF(!((long)get_auxv_entry(AT_HWCAP2) & PPC_FEATURE2_HTM));
+ shm_id = shmget(IPC_PRIVATE, sizeof(struct shared), 0777|IPC_CREAT);
+ shm_id1 = shmget(IPC_PRIVATE, sizeof(int), 0777|IPC_CREAT);
+ pid = fork();
+ if (pid < 0) {
+ perror("fork() failed");
+ return TEST_FAIL;
+ }
+
+ if (pid == 0)
+ tm_spr();
+
+ if (pid) {
+ pptr = (struct shared *)shmat(shm_id, NULL, 0);
+ pptr1 = (int *)shmat(shm_id1, NULL, 0);
+
+ while (!pptr1[0]);
+ ret = trace_tm_spr(pid);
+ if (ret) {
+ kill(pid, SIGKILL);
+ shmdt((void *)pptr);
+ shmdt((void *)pptr1);
+ shmctl(shm_id, IPC_RMID, NULL);
+ shmctl(shm_id1, IPC_RMID, NULL);
+ return TEST_FAIL;
+ }
+
+ shmdt((void *)pptr);
+ shmdt((void *)pptr1);
+ ret = wait(&status);
+ shmctl(shm_id, IPC_RMID, NULL);
+ shmctl(shm_id1, IPC_RMID, NULL);
+ if (ret != pid) {
+ printf("Child's exit status not captured\n");
+ return TEST_FAIL;
+ }
+
+ if (WIFEXITED(status)) {
+ if (WEXITSTATUS(status))
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+ }
+ return TEST_PASS;
+}
+
+int main(int argc, char *argv[])
+{
+ return test_harness(ptrace_tm_spr, "ptrace_tm_spr");
+}
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace.h b/tools/testing/selftests/powerpc/ptrace/ptrace.h
index 442a9a0..ad9fb2e 100644
--- a/tools/testing/selftests/powerpc/ptrace/ptrace.h
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace.h
@@ -67,6 +67,11 @@ struct fpr_regs {
unsigned long fpscr;
};
+struct tm_spr_regs {
+ unsigned long tm_tfhar;
+ unsigned long tm_texasr;
+ unsigned long tm_tfiar;
+};
/* Basic ptrace operations */
int start_trace(pid_t child)
@@ -680,6 +685,36 @@ int write_vsx_ckpt(pid_t child, unsigned long *vsx)
return TEST_PASS;
}
+/* TM SPR */
+int show_tm_spr(pid_t child, struct tm_spr_regs *out)
+{
+ struct tm_spr_regs *regs;
+ struct iovec iov;
+ int ret;
+
+ regs = (struct tm_spr_regs *) malloc(sizeof(struct tm_spr_regs));
+ if (!regs) {
+ perror("malloc() failed");
+ return TEST_FAIL;
+ }
+
+ iov.iov_base = (u64 *) regs;
+ iov.iov_len = sizeof(struct tm_spr_regs);
+
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_SPR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+
+ if (out)
+ memcpy(out, regs, sizeof(struct tm_spr_regs));
+
+ return TEST_PASS;
+}
+
+
+
/* Analyse TEXASR after TM failure */
inline unsigned long get_tfiar(void)
{
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 29/30] selftests/powerpc: Add .gitignore file for ptrace executables
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (27 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 28/30] selftests/powerpc: Add ptrace tests for TM SPR registers wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 30/30] selftests/powerpc: Fix a build issue wei.guo.simon
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch adds a .gitignore file for all the executables in
the ptrace test directory thus making invisible with git status
query.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
tools/testing/selftests/powerpc/ptrace/.gitignore | 11 +++++++++++
1 file changed, 11 insertions(+)
create mode 100644 tools/testing/selftests/powerpc/ptrace/.gitignore
diff --git a/tools/testing/selftests/powerpc/ptrace/.gitignore b/tools/testing/selftests/powerpc/ptrace/.gitignore
new file mode 100644
index 0000000..bdf3566
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/.gitignore
@@ -0,0 +1,11 @@
+ptrace-ebb
+ptrace-gpr
+ptrace-tm-gpr
+ptrace-tm-spd-gpr
+ptrace-tar
+ptrace-tm-tar
+ptrace-tm-spd-tar
+ptrace-vsx
+ptrace-tm-vsx
+ptrace-tm-spd-vsx
+ptrace-tm-spr
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v13 30/30] selftests/powerpc: Fix a build issue
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
` (28 preceding siblings ...)
2016-07-28 2:57 ` [PATCH v13 29/30] selftests/powerpc: Add .gitignore file for ptrace executables wei.guo.simon
@ 2016-07-28 2:57 ` wei.guo.simon
29 siblings, 0 replies; 34+ messages in thread
From: wei.guo.simon @ 2016-07-28 2:57 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Fixes the following build failure -
cp_abort.c:90:3: error: ‘for’ loop initial declarations are only
allowed in C99 or C11 mode
for (int i = 0; i < NUM_LOOPS; i++) {
^
cp_abort.c:90:3: note: use option -std=c99, -std=gnu99, -std=c11 or
-std=gnu11 to compile your code
cp_abort.c:97:3: error: ‘for’ loop initial declarations are only
allowed in C99 or C11 mode
for (int i = 0; i < NUM_LOOPS; i++) {
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
tools/testing/selftests/powerpc/context_switch/cp_abort.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/powerpc/context_switch/cp_abort.c b/tools/testing/selftests/powerpc/context_switch/cp_abort.c
index 5a5b55a..1ce7dce 100644
--- a/tools/testing/selftests/powerpc/context_switch/cp_abort.c
+++ b/tools/testing/selftests/powerpc/context_switch/cp_abort.c
@@ -67,7 +67,7 @@ int test_cp_abort(void)
/* 128 bytes for a full cache line */
char buf[128] __cacheline_aligned;
cpu_set_t cpuset;
- int fd1[2], fd2[2], pid;
+ int fd1[2], fd2[2], pid, i;
char c;
/* only run this test on a P9 or later */
@@ -87,14 +87,14 @@ int test_cp_abort(void)
FAIL_IF(pid < 0);
if (!pid) {
- for (int i = 0; i < NUM_LOOPS; i++) {
+ for (i = 0; i < NUM_LOOPS; i++) {
FAIL_IF((write(fd1[WRITE_FD], &c, 1)) != 1);
FAIL_IF((read(fd2[READ_FD], &c, 1)) != 1);
/* A paste succeeds if CR0 EQ bit is set */
FAIL_IF(paste(buf) & 0x20000000);
}
} else {
- for (int i = 0; i < NUM_LOOPS; i++) {
+ for (i = 0; i < NUM_LOOPS; i++) {
FAIL_IF((read(fd1[READ_FD], &c, 1)) != 1);
copy(buf);
FAIL_IF((write(fd2[WRITE_FD], &c, 1) != 1));
--
1.8.3.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* Re: [PATCH v13 06/30] powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction
2016-07-28 2:57 ` [PATCH v13 06/30] powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction wei.guo.simon
@ 2016-08-04 6:36 ` Daniel Axtens
2016-08-04 8:28 ` Michael Ellerman
0 siblings, 1 reply; 34+ messages in thread
From: Daniel Axtens @ 2016-08-04 6:36 UTC (permalink / raw)
To: wei.guo.simon, linuxppc-dev, linux-kernel
Cc: Michael Ellerman, Shuah Khan, Anton Blanchard, Cyril Bur,
Anshuman Khandual, Simon Guo, Ulrich Weigand, Michael Neuling,
Andrew Morton, Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu,
Jiri Kosina, Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
[-- Attachment #1: Type: text/plain, Size: 2187 bytes --]
Hi all,
This is causing cppcheck warnings (having just landed in next):
[arch/powerpc/kernel/ptrace.c:2062]: (error) Uninitialized variable: ckpt_regs
[arch/powerpc/kernel/ptrace.c:2130]: (error) Uninitialized variable: ckpt_regs
This is from...
> -static int gpr32_get(struct task_struct *target,
> +static int gpr32_get_common(struct task_struct *target,
> const struct user_regset *regset,
> unsigned int pos, unsigned int count,
> - void *kbuf, void __user *ubuf)
> + void *kbuf, void __user *ubuf, bool tm_active)
> {
> const unsigned long *regs = &target->thread.regs->gpr[0];
> + const unsigned long *ckpt_regs;
> compat_ulong_t *k = kbuf;
> compat_ulong_t __user *u = ubuf;
> compat_ulong_t reg;
> int i;
>
> - if (target->thread.regs == NULL)
> - return -EIO;
> +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
> + ckpt_regs = &target->thread.ckpt_regs.gpr[0];
> +#endif
> + if (tm_active) {
> + regs = ckpt_regs;
... this bit here. If the ifdef doesn't trigger, cppcheck can't find an
initialisation for ckpt_regs, so it complains.
Techinically it's a false positive as (I assume!) tm_active cannot ever
be true in the absense of CONFIG_PPC_TRANSACTIONAL_MEM.
Is there a nice simple fix we could deploy to squash this warning, or
will we just live with it?
> -static int gpr32_set(struct task_struct *target,
> +static int gpr32_set_common(struct task_struct *target,
> const struct user_regset *regset,
> unsigned int pos, unsigned int count,
> - const void *kbuf, const void __user *ubuf)
> + const void *kbuf, const void __user *ubuf, bool tm_active)
> {
> unsigned long *regs = &target->thread.regs->gpr[0];
> + unsigned long *ckpt_regs;
> const compat_ulong_t *k = kbuf;
> const compat_ulong_t __user *u = ubuf;
> compat_ulong_t reg;
>
> - if (target->thread.regs == NULL)
> - return -EIO;
> +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
> + ckpt_regs = &target->thread.ckpt_regs.gpr[0];
> +#endif
>
> - CHECK_FULL_REGS(target->thread.regs);
> + if (tm_active) {
> + regs = ckpt_regs;
FWIW it happens again here.
Regards,
Daniel Axtens
[-- Attachment #2: signature.asc --]
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^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH v13 06/30] powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction
2016-08-04 6:36 ` Daniel Axtens
@ 2016-08-04 8:28 ` Michael Ellerman
2016-08-05 0:30 ` Daniel Axtens
0 siblings, 1 reply; 34+ messages in thread
From: Michael Ellerman @ 2016-08-04 8:28 UTC (permalink / raw)
To: Daniel Axtens, wei.guo.simon, linuxppc-dev, linux-kernel
Cc: Shuah Khan, Anton Blanchard, Cyril Bur, Anshuman Khandual,
Simon Guo, Ulrich Weigand, Michael Neuling, Andrew Morton,
Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu, Jiri Kosina,
Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
Daniel Axtens <dja@axtens.net> writes:
> [ Unknown signature status ]
> Hi all,
>
> This is causing cppcheck warnings (having just landed in next):
>
> [arch/powerpc/kernel/ptrace.c:2062]: (error) Uninitialized variable: ckpt_regs
> [arch/powerpc/kernel/ptrace.c:2130]: (error) Uninitialized variable: ckpt_regs
Sigh.
> This is from...
>> -static int gpr32_get(struct task_struct *target,
>> +static int gpr32_get_common(struct task_struct *target,
>> const struct user_regset *regset,
>> unsigned int pos, unsigned int count,
>> - void *kbuf, void __user *ubuf)
>> + void *kbuf, void __user *ubuf, bool tm_active)
>> {
>> const unsigned long *regs = &target->thread.regs->gpr[0];
>> + const unsigned long *ckpt_regs;
>> compat_ulong_t *k = kbuf;
>> compat_ulong_t __user *u = ubuf;
>> compat_ulong_t reg;
>> int i;
>>
>> - if (target->thread.regs == NULL)
>> - return -EIO;
>> +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
>> + ckpt_regs = &target->thread.ckpt_regs.gpr[0];
>> +#endif
>> + if (tm_active) {
>> + regs = ckpt_regs;
> ... this bit here. If the ifdef doesn't trigger, cppcheck can't find an
> initialisation for ckpt_regs, so it complains.
>
> Techinically it's a false positive as (I assume!) tm_active cannot ever
> be true in the absense of CONFIG_PPC_TRANSACTIONAL_MEM.
That's correct, so the code is safe. See the one call site (which passes an int!):
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
static int tm_cgpr32_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
return gpr32_get_common(target, regset, pos, count, kbuf, ubuf, 1);
}
> Is there a nice simple fix we could deploy to squash this warning, or
> will we just live with it?
This series has been nothing but pain. Given we're already at v13, and people
really want this support to go in, I'm going to leave it in the tree.
Once it's in we can refactor the implementation, which is a bit of a mess, and
hopefully in the process fix the warnings.
cheers
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH v13 06/30] powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction
2016-08-04 8:28 ` Michael Ellerman
@ 2016-08-05 0:30 ` Daniel Axtens
0 siblings, 0 replies; 34+ messages in thread
From: Daniel Axtens @ 2016-08-05 0:30 UTC (permalink / raw)
To: Michael Ellerman, wei.guo.simon, linuxppc-dev, linux-kernel
Cc: Shuah Khan, Anton Blanchard, Cyril Bur, Anshuman Khandual,
Simon Guo, Ulrich Weigand, Michael Neuling, Andrew Morton,
Kees Cook, Rashmica Gupta, Khem Raj, Jessica Yu, Jiri Kosina,
Miroslav Benes, Suraj Jitindar Singh, Chris Smart,
linux-kselftest
[-- Attachment #1: Type: text/plain, Size: 525 bytes --]
Michael Ellerman <mpe@ellerman.id.au> writes:
>> Is there a nice simple fix we could deploy to squash this warning, or
>> will we just live with it?
>
> This series has been nothing but pain. Given we're already at v13, and people
> really want this support to go in, I'm going to leave it in the tree.
>
> Once it's in we can refactor the implementation, which is a bit of a mess, and
> hopefully in the process fix the warnings.
OK, I'll push this onto my stack to look at again in a couple of months.
Regards,
Daniel
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 859 bytes --]
^ permalink raw reply [flat|nested] 34+ messages in thread
end of thread, other threads:[~2016-08-05 0:30 UTC | newest]
Thread overview: 34+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-07-28 2:57 [PATCH v13 00/30] Add new powerpc specific ELF core notes wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 01/30] elf: Add powerpc specific core note sections wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 02/30] powerpc/process: Add the function flush_tmregs_to_thread wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 03/30] powerpc/ptrace: Enable in transaction NT_PRFPREG ptrace requests wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 04/30] powerpc/ptrace: Enable in transaction NT_PPC_VMX " wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 05/30] powerpc/ptrace: Enable in transaction NT_PPC_VSX " wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 06/30] powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction wei.guo.simon
2016-08-04 6:36 ` Daniel Axtens
2016-08-04 8:28 ` Michael Ellerman
2016-08-05 0:30 ` Daniel Axtens
2016-07-28 2:57 ` [PATCH v13 07/30] powerpc/ptrace: Enable support for NT_PPC_CGPR wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 08/30] powerpc/ptrace: Enable support for NT_PPC_CFPR wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 09/30] powerpc/ptrace: Enable support for NT_PPC_CVMX wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 10/30] powerpc/ptrace: Enable support for NT_PPC_CVSX wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 11/30] powerpc/ptrace: Enable support for TM SPR state wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 12/30] powerpc/ptrace: Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 13/30] powerpc/ptrace: Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 14/30] powerpc/ptrace: Enable support for EBB registers wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 15/30] powerpc/ptrace: Enable support for Performance Monitor registers wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 16/30] selftests/powerpc: Add more SPR numbers, TM & VMX instructions to 'reg.h' wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 17/30] selftests/powerpc: Use the new SPRN_DSCR_PRIV definiton wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 18/30] selftests/powerpc: Add ptrace tests for EBB wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 19/30] selftests/powerpc: Add ptrace tests for GPR/FPR registers wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 20/30] selftests/powerpc: Add ptrace tests for GPR/FPR registers in TM wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 21/30] selftests/powerpc: Add ptrace tests for GPR/FPR registers in suspended TM wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 22/30] selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR registers wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 23/30] selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR in TM wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 24/30] selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR in suspended TM wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 25/30] selftests/powerpc: Add ptrace tests for VSX, VMX registers wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 26/30] selftests/powerpc: Add ptrace tests for VSX, VMX registers in TM wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 27/30] selftests/powerpc: Add ptrace tests for VSX, VMX registers in suspended TM wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 28/30] selftests/powerpc: Add ptrace tests for TM SPR registers wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 29/30] selftests/powerpc: Add .gitignore file for ptrace executables wei.guo.simon
2016-07-28 2:57 ` [PATCH v13 30/30] selftests/powerpc: Fix a build issue wei.guo.simon
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