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Groups > linux.kernel > #1242452 > unrolled thread
| Started by | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| First post | 2015-10-08 16:50 +0200 |
| Last post | 2015-10-08 17:00 +0200 |
| Articles | 20 on this page of 24 — 1 participant |
Back to article view | Back to linux.kernel
[PATCH V9 00/28] Add new powerpc specific ELF core notes Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 16:50 +0200
[PATCH V9 06/28] powerpc, ptrace: Adapt gpr32_get, gpr32_set functions for transaction Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 16:50 +0200
[PATCH V9 09/28] powerpc, ptrace: Enable support for NT_PPC_CVMX Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 16:50 +0200
[PATCH V9 01/28] elf: Add powerpc specific core note sections Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 16:50 +0200
[PATCH V9 26/28] selftests, powerpc: Add ptrace tests for VSX, VMX registers in suspended TM Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 16/28] selftests, powerpc: Add more SPR numbers, TM & VMX instructions to 'reg.h' Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 28/28] selftests, powerpc: Add .gitignore file for ptrace executables Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 17/28] selftests, powerpc: Add ptrace tests for EBB Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 12/28] powerpc, ptrace: Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 27/28] selftests, powerpc: Add ptrace tests for TM SPR registers Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 08/28] powerpc, ptrace: Enable support for NT_PPC_CFPR Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 11/28] powerpc, ptrace: Enable support for TM SPR state Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 21/28] selftests, powerpc: Add ptrace tests for TAR, PPR, DSCR registers Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 19/28] selftests, powerpc: Add ptrace tests for GPR/FPR registers in TM Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 23/28] selftests, powerpc: Add ptrace tests for TAR, PPR, DSCR in suspended TM Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 25/28] selftests, powerpc: Add ptrace tests for VSX, VMX registers in TM Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 18/28] selftests, powerpc: Add ptrace tests for GPR/FPR registers Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 13/28] powerpc, ptrace: Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 20/28] selftests, powerpc: Add ptrace tests for GPR/FPR registers in suspended TM Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 22/28] selftests, powerpc: Add ptrace tests for TAR, PPR, DSCR in TM Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 04/28] powerpc, ptrace: Enable in transaction NT_PPC_VMX ptrace requests Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 24/28] selftests, powerpc: Add ptrace tests for VSX, VMX registers Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 14/28] powerpc, ptrace: Enable support for EBB registers Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
[PATCH V9 15/28] selftests, powerpc: Move 'reg.h' file outside of 'ebb' sub directory Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2015-10-08 17:00 +0200
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| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 16:50 +0200 |
| Subject | [PATCH V9 00/28] Add new powerpc specific ELF core notes |
| Message-ID | <qhkG5-6u9-5@gated-at.bofh.it> |
This patch series adds twelve new ELF core note sections which can be used with existing ptrace request PTRACE_GETREGSET-SETREGSET for accessing various transactional memory and other miscellaneous debug register sets on powerpc platform. 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 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 (28): 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 selftests, powerpc: Move 'reg.h' file outside of 'ebb' sub directory selftests, powerpc: Add more SPR numbers, TM & VMX instructions to 'reg.h' 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 arch/powerpc/include/asm/switch_to.h | 8 + arch/powerpc/include/uapi/asm/elf.h | 6 + arch/powerpc/kernel/process.c | 20 + arch/powerpc/kernel/ptrace.c | 1737 ++++++++++++++++++-- include/uapi/linux/elf.h | 12 + tools/testing/selftests/powerpc/Makefile | 2 +- tools/testing/selftests/powerpc/pmu/ebb/ebb.c | 2 +- tools/testing/selftests/powerpc/pmu/ebb/ebb.h | 2 +- .../selftests/powerpc/pmu/ebb/ebb_handler.S | 2 +- tools/testing/selftests/powerpc/pmu/ebb/reg.h | 49 - .../selftests/powerpc/pmu/ebb/reg_access_test.c | 2 +- tools/testing/selftests/powerpc/ptrace/.gitignore | 11 + tools/testing/selftests/powerpc/ptrace/Makefile | 12 + .../testing/selftests/powerpc/ptrace/ptrace-ebb.c | 150 ++ .../testing/selftests/powerpc/ptrace/ptrace-ebb.h | 103 ++ .../testing/selftests/powerpc/ptrace/ptrace-gpr.c | 191 +++ .../testing/selftests/powerpc/ptrace/ptrace-gpr.h | 73 + .../testing/selftests/powerpc/ptrace/ptrace-tar.c | 151 ++ .../testing/selftests/powerpc/ptrace/ptrace-tar.h | 50 + .../selftests/powerpc/ptrace/ptrace-tm-gpr.c | 288 ++++ .../selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c | 319 ++++ .../selftests/powerpc/ptrace/ptrace-tm-spd-tar.c | 184 +++ .../selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c | 212 +++ .../selftests/powerpc/ptrace/ptrace-tm-spr.c | 157 ++ .../selftests/powerpc/ptrace/ptrace-tm-tar.c | 170 ++ .../selftests/powerpc/ptrace/ptrace-tm-vsx.c | 196 +++ .../testing/selftests/powerpc/ptrace/ptrace-vsx.c | 138 ++ .../testing/selftests/powerpc/ptrace/ptrace-vsx.h | 104 ++ tools/testing/selftests/powerpc/ptrace/ptrace.S | 396 +++++ tools/testing/selftests/powerpc/ptrace/ptrace.h | 766 +++++++++ tools/testing/selftests/powerpc/reg.h | 70 + 31 files changed, 5405 insertions(+), 178 deletions(-) delete mode 100644 tools/testing/selftests/powerpc/pmu/ebb/reg.h 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 create mode 100644 tools/testing/selftests/powerpc/reg.h -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 16:50 +0200 |
| Subject | [PATCH V9 06/28] powerpc, ptrace: Adapt gpr32_get, gpr32_set functions for transaction |
| Message-ID | <qhkG6-6u9-39@gated-at.bofh.it> |
| In reply to | #1242452 |
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>
---
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 20abb35..96445db 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -906,24 +906,35 @@ 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);
@@ -963,20 +974,31 @@ 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);
@@ -1036,6 +1058,22 @@ 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.
*/
--
2.1.0
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| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 16:50 +0200 |
| Subject | [PATCH V9 09/28] powerpc, ptrace: Enable support for NT_PPC_CVMX |
| Message-ID | <qhkG7-6u9-45@gated-at.bofh.it> |
| In reply to | #1242452 |
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>
---
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 59dad11..6c900be 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 3c69767..13d7518 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -63,6 +63,8 @@ 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),
@@ -1146,6 +1148,151 @@ 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
/*
@@ -1166,6 +1313,7 @@ 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
};
@@ -1212,6 +1360,11 @@ 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
};
@@ -1449,6 +1602,11 @@ 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
};
--
2.1.0
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| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 16:50 +0200 |
| Subject | [PATCH V9 01/28] elf: Add powerpc specific core note sections |
| Message-ID | <qhkG7-6u9-47@gated-at.bofh.it> |
| In reply to | #1242452 |
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 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>
---
include/uapi/linux/elf.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
index 71e1d0e..58654c2 100644
--- a/include/uapi/linux/elf.h
+++ b/include/uapi/linux/elf.h
@@ -379,6 +379,18 @@ 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_TM_CGPR 0x107 /* TM checkpointed GPR Registers */
+#define NT_PPC_TM_CFPR 0x108 /* TM checkpointed FPR Registers */
+#define NT_PPC_TM_CVMX 0x109 /* TM checkpointed VMX Registers */
+#define NT_PPC_TM_CVSX 0x10a /* TM checkpointed VSX Registers */
+#define NT_PPC_TM_SPR 0x10b /* TM Special Purpose Registers */
+#define NT_PPC_TM_CTAR 0x10c /* TM checkpointed Target Address Register */
+#define NT_PPC_TM_CPPR 0x10d /* TM checkpointed Program Priority Register */
+#define NT_PPC_TM_CDSCR 0x10e /* 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 */
--
2.1.0
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| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 17:00 +0200 |
| Subject | [PATCH V9 26/28] selftests, powerpc: Add ptrace tests for VSX, VMX registers in suspended TM |
| Message-ID | <qhkPL-6FW-1@gated-at.bofh.it> |
| In reply to | #1242452 |
This patch adds ptrace interface test for VSX, VMX registers
inside suspended TM context.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 3 +-
.../selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c | 212 +++++++++++++++++++++
2 files changed, 214 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 092fbef..ea57351 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..e52a309
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c
@@ -0,0 +1,212 @@
+/*
+ * 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;
+
+extern void loadvsx(void *p, int tmp);
+extern 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)
+{
+ while(!cptr[1]);
+}
+
+void tm_spd_vsx(void)
+{
+ unsigned long result, texasr;
+ int ret;
+
+ cptr = (int *)shmat(shm_id, NULL, 0);
+trans:
+ 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);
+ }
+ exit(1);
+}
+
+int trace_tm_spd_vsx(pid_t child)
+{
+ unsigned long vsx[VSX_MAX];
+ unsigned long vmx[VMX_MAX + 2][2];
+ int ret;
+
+ sleep(1);
+ 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;
+
+ 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) * 2, 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);
+ ret = trace_tm_spd_vsx(pid);
+ if (ret) {
+ kill(pid, SIGKILL);
+ return TEST_FAIL;
+ }
+
+ pptr[0] = 1;
+ pptr[1] = 1;
+ shmdt((void *)pptr);
+ 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_tm_spd_vsx, "ptrace_tm_spd_vsx");
+}
--
2.1.0
--
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| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 17:00 +0200 |
| Subject | [PATCH V9 16/28] selftests, powerpc: Add more SPR numbers, TM & VMX instructions to 'reg.h' |
| Message-ID | <qhkPL-6FW-5@gated-at.bofh.it> |
| In reply to | #1242452 |
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>
---
tools/testing/selftests/powerpc/reg.h | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/tools/testing/selftests/powerpc/reg.h b/tools/testing/selftests/powerpc/reg.h
index 5921b0d..76f170d 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
@@ -46,4 +59,12 @@
#define SPRN_SDAR 781
#define SPRN_SIER 768
+#define SPRN_DSCR 3 /* Data Stream Control Register */
+#define SPRN_TAR 815 /* Target Address Register */
+#define SPRN_PPR 896 /* Program Priority Register */
+
+#define SPRN_TFHAR 0x80 /* TM Failure Handle Register */
+#define SPRN_TFIAR 0x81 /* TM Failure Instruction Address Register */
+#define SPRN_TEXASR 0x82 /* TM Exception and Status Register */
+
#endif /* _SELFTESTS_POWERPC_REG_H */
--
2.1.0
--
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| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 17:00 +0200 |
| Subject | [PATCH V9 28/28] selftests, powerpc: Add .gitignore file for ptrace executables |
| Message-ID | <qhkPL-6FW-11@gated-at.bofh.it> |
| In reply to | #1242452 |
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> --- 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 -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 17:00 +0200 |
| Subject | [PATCH V9 17/28] selftests, powerpc: Add ptrace tests for EBB |
| Message-ID | <qhkPM-6FW-13@gated-at.bofh.it> |
| In reply to | #1242452 |
This patch adds ptrace interface test for EBB 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>
---
tools/testing/selftests/powerpc/Makefile | 2 +-
tools/testing/selftests/powerpc/ptrace/Makefile | 7 +
.../testing/selftests/powerpc/ptrace/ptrace-ebb.c | 150 ++++++++++++++
.../testing/selftests/powerpc/ptrace/ptrace-ebb.h | 103 ++++++++++
tools/testing/selftests/powerpc/ptrace/ptrace.h | 225 +++++++++++++++++++++
5 files changed, 486 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 03ca2e6..b951314 100644
--- a/tools/testing/selftests/powerpc/Makefile
+++ b/tools/testing/selftests/powerpc/Makefile
@@ -12,7 +12,7 @@ CFLAGS := -Wall -O2 -flto -Wall -Werror -DGIT_VERSION='"$(GIT_VERSION)"' -I$(CUR
export CFLAGS
-SUB_DIRS = pmu copyloops mm tm primitives stringloops vphn switch_endian dscr
+SUB_DIRS = pmu copyloops mm tm primitives stringloops vphn switch_endian dscr ptrace
endif
diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
new file mode 100644
index 0000000..59386ba
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -0,0 +1,7 @@
+TEST_PROGS := ptrace-ebb
+all: $(TEST_PROGS)
+
+$(TEST_PROGS): ../harness.c
+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..e1ca608
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-ebb.c
@@ -0,0 +1,150 @@
+/*
+ * 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"
+
+void ebb(void)
+{
+ struct event event;
+
+ 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));
+ while(1)
+ core_busy_loop();
+ 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);
+ printf("EBBHR: %lx\n", regs->ebbhr);
+ printf("BESCR: %lx\n", regs->bescr);
+ printf("SIAR: %lx\n", regs->siar);
+ printf("SDAR: %lx\n", regs->sdar);
+ printf("SIER: %lx\n", regs->sier);
+ printf("MMCR2: %lx\n", regs->mmcr2);
+ printf("MMCR0: %lx\n", regs->mmcr0);
+
+ /* Validate EBBHR */
+ #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
+
+ /* 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(pid_t child)
+{
+ struct ebb_regs regs;
+ int ret;
+
+ sleep(2);
+ ret = start_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_ebb_registers(child, ®s);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_ebb(®s);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = stop_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ return TEST_PASS;
+}
+
+int ptrace_ebb(void)
+{
+ pid_t pid;
+ int ret, status;
+
+ pid = fork();
+ if (pid < 0) {
+ perror("fork() failed");
+ return TEST_FAIL;
+ }
+
+ if (pid == 0)
+ ebb();
+
+ if (pid) {
+ ret = trace_ebb(pid);
+ if (ret)
+ return TEST_FAIL;
+
+ 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, "ptrace_ebb");
+}
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..9b38edc
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-ebb.h
@@ -0,0 +1,103 @@
+/*
+ * 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..44256d2
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace.h
@@ -0,0 +1,225 @@
+/*
+ * 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_TM_CGPR 0x107 /* TM checkpointed GPR Registers */
+#define NT_PPC_TM_CFPR 0x108 /* TM checkpointed FPR Registers */
+#define NT_PPC_TM_CVMX 0x109 /* TM checkpointed VMX Registers */
+#define NT_PPC_TM_CVSX 0x10a /* TM checkpointed VSX Registers */
+#define NT_PPC_TM_SPR 0x10b /* TM Special Purpose Registers */
+#define NT_PPC_TM_CTAR 0x10c /* TM checkpointed Target Address Register */
+#define NT_PPC_TM_CPPR 0x10d /* TM checkpointed Program Priority Register */
+#define NT_PPC_TM_CDSCR 0x10e /* TM checkpointed Data Stream Control 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
+
+#define TEST_PASS 0
+#define TEST_FAIL 1
+
+struct ebb_regs {
+ unsigned long ebbrr;
+ unsigned long ebbhr;
+ unsigned long bescr;
+ 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;
+}
+
+/* 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());
+}
--
2.1.0
--
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| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 17:00 +0200 |
| Subject | [PATCH V9 12/28] powerpc, ptrace: Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR |
| Message-ID | <qhkPM-6FW-17@gated-at.bofh.it> |
| In reply to | #1242452 |
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>
---
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 787b514..45aa204 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -1541,6 +1541,151 @@ 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 */
/*
@@ -1564,6 +1709,9 @@ 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
};
@@ -1625,6 +1773,21 @@ 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
};
@@ -1877,6 +2040,21 @@ 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
};
--
2.1.0
--
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[toc] | [prev] | [next] | [standalone]
| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 17:00 +0200 |
| Subject | [PATCH V9 27/28] selftests, powerpc: Add ptrace tests for TM SPR registers |
| Message-ID | <qhkPM-6FW-19@gated-at.bofh.it> |
| In reply to | #1242452 |
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>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 2 +-
.../selftests/powerpc/ptrace/ptrace-tm-spr.c | 157 +++++++++++++++++++++
tools/testing/selftests/powerpc/ptrace/ptrace.h | 35 +++++
3 files changed, 193 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 ea57351..a46a0e5 100644
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -1,6 +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-tm-spd-vsx
+ptrace-tm-spd-vsx ptrace-tm-spr
all: $(TEST_PROGS)
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..d70ffb2
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spr.c
@@ -0,0 +1,157 @@
+/*
+ * 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;
+
+#define TM_SCHED 0xde0000018c000001
+#define TM_KVM_SCHED 0xe0000001ac000001
+
+int validate_tm_spr(struct tm_spr_regs *regs)
+{
+ if (regs->tm_tfhar != (tfhar - 32))
+ 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);
+trans:
+ asm __volatile__(
+ "1: ;"
+ TBEGIN
+ "beq 2f;"
+
+ "b .;"
+
+ TEND
+ "li 0, 0;"
+ "ori %[res], 0, 0;"
+ "b 3f;"
+
+ "2: ;"
+ "mflr 31;"
+ "bl 4f;" /* $ = TFHAR + 2 */
+ "4: ;"
+ "mflr %[tfhar];"
+ "mtlr 31;"
+
+ "li 0, 1;"
+ "ori %[res], 0, 0;"
+ "mfspr %[texasr], %[sprn_texasr];"
+
+ "3: ;"
+ : [tfhar] "=r" (tfhar), [res] "=r" (result), [texasr] "=r" (texasr)
+ : [sprn_texasr] "i" (SPRN_TEXASR)
+ : "memory", "r0", "r1", "r2", "r3", "r4", "r8", "r9", "r10", "r11"
+ );
+
+ if (result) {
+ if (!cptr->flag)
+ goto trans;
+
+ ret = validate_tm_spr((struct tm_spr_regs *)&cptr->regs);
+ shmdt((void *)cptr);
+ if (ret)
+ exit(1);
+ exit(0);
+ }
+ shmdt((void *)cptr);
+ exit(1);
+}
+
+int trace_tm_spr(pid_t child)
+{
+ int ret;
+
+ sleep(1);
+ 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);
+
+ 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);
+ 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);
+ ret = trace_tm_spr(pid);
+ if (ret) {
+ kill(pid, SIGKILL);
+ return TEST_FAIL;
+ }
+
+ pptr->flag = 1;
+ shmdt((void *)pptr);
+ 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_tm_spr, "ptrace_tm_spr");
+}
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace.h b/tools/testing/selftests/powerpc/ptrace/ptrace.h
index 3793ff6..fe655de0 100644
--- a/tools/testing/selftests/powerpc/ptrace/ptrace.h
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace.h
@@ -83,6 +83,11 @@ 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)
@@ -663,6 +668,36 @@ 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)
{
--
2.1.0
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| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 17:00 +0200 |
| Subject | [PATCH V9 08/28] powerpc, ptrace: Enable support for NT_PPC_CFPR |
| Message-ID | <qhkPM-6FW-25@gated-at.bofh.it> |
| In reply to | #1242452 |
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>
---
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 5b3f3e9..3c69767 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -1031,6 +1031,121 @@ 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
/*
@@ -1050,6 +1165,7 @@ enum powerpc_regset {
#endif
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
REGSET_TM_CGPR, /* TM checkpointed GPR registers */
+ REGSET_TM_CFPR, /* TM checkpointed FPR registers */
#endif
};
@@ -1091,6 +1207,11 @@ 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
};
@@ -1323,6 +1444,11 @@ 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
};
--
2.1.0
--
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| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 17:00 +0200 |
| Subject | [PATCH V9 11/28] powerpc, ptrace: Enable support for TM SPR state |
| Message-ID | <qhkPM-6FW-21@gated-at.bofh.it> |
| In reply to | #1242452 |
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>
---
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 4477318..9e6b6e3 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 d8c08a9..787b514 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -65,6 +65,7 @@ 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),
@@ -1411,7 +1412,136 @@ 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.
@@ -1433,6 +1563,7 @@ 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
};
@@ -1489,6 +1620,11 @@ 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
};
@@ -1736,6 +1872,11 @@ 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
};
--
2.1.0
--
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| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 17:00 +0200 |
| Subject | [PATCH V9 21/28] selftests, powerpc: Add ptrace tests for TAR, PPR, DSCR registers |
| Message-ID | <qhkPM-6FW-29@gated-at.bofh.it> |
| In reply to | #1242452 |
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>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 3 +-
.../testing/selftests/powerpc/ptrace/ptrace-tar.c | 151 +++++++++++++++++
.../testing/selftests/powerpc/ptrace/ptrace-tar.h | 50 ++++++
tools/testing/selftests/powerpc/ptrace/ptrace.h | 179 +++++++++++++++++++++
4 files changed, 382 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 a8fa080..28d4465 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)
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..51978aa
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tar.c
@@ -0,0 +1,151 @@
+/*
+ * 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);
+
+ /* 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;
+
+ sleep(1);
+ 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) * 2, 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;
+ 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);
+ 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..5031e46
--- /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 439fb65..a5efdee 100644
--- a/tools/testing/selftests/powerpc/ptrace/ptrace.h
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace.h
@@ -157,6 +157,185 @@ 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)
{
--
2.1.0
--
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[toc] | [prev] | [next] | [standalone]
| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 17:00 +0200 |
| Subject | [PATCH V9 19/28] selftests, powerpc: Add ptrace tests for GPR/FPR registers in TM |
| Message-ID | <qhkPM-6FW-33@gated-at.bofh.it> |
| In reply to | #1242452 |
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>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 3 +-
.../selftests/powerpc/ptrace/ptrace-tm-gpr.c | 288 +++++++++++++++++++++
2 files changed, 290 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 dfeb36e..4d7cbe8 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)
$(TEST_PROGS): ../harness.c ptrace.S
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..3efa5d6
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-gpr.c
@@ -0,0 +1,288 @@
+/*
+ * 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 int *cptr, *pptr;
+
+extern void store_gpr(unsigned long *addr);
+extern 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 = (int *)shmat(shm_id, NULL, 0);
+
+trans:
+ 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
+ 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)
+ : "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;
+
+ 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);
+ }
+ exit(1);
+}
+
+int trace_tm_gpr(pid_t child)
+{
+ unsigned long gpr[18];
+ unsigned long fpr[32];
+ int ret;
+
+ sleep(1);
+ 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;
+
+ 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) * 1, 0777|IPC_CREAT);
+ pid = fork();
+ if (pid < 0) {
+ perror("fork() failed");
+ return TEST_FAIL;
+ }
+ if (pid == 0)
+ tm_gpr();
+
+ if (pid) {
+ pptr = (int *)shmat(shm_id, NULL, 0);
+ ret = trace_tm_gpr(pid);
+ if (ret) {
+ kill(pid, SIGTERM);
+ return TEST_FAIL;
+ }
+
+ pptr[0] = 1;
+ shmdt((void *)pptr);
+
+ 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_tm_gpr, "ptrace_tm_gpr");
+}
--
2.1.0
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 17:00 +0200 |
| Subject | [PATCH V9 23/28] selftests, powerpc: Add ptrace tests for TAR, PPR, DSCR in suspended TM |
| Message-ID | <qhkPN-6FW-39@gated-at.bofh.it> |
| In reply to | #1242452 |
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>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 2 +-
.../selftests/powerpc/ptrace/ptrace-tm-spd-tar.c | 184 +++++++++++++++++++++
2 files changed, 185 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 a5d177b..f058083 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)
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..56f604b
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-tar.c
@@ -0,0 +1,184 @@
+/*
+ * 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)
+{
+ 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:
+ 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;
+
+ sleep(1);
+ 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);
+
+ 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) * 2, 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) {
+ ret = trace_tm_spd_tar(pid);
+ if (ret) {
+ kill(pid, SIGTERM);
+ return TEST_FAIL;
+ }
+
+ pptr[0] = 1;
+ pptr[1] = 1;
+ shmdt(&pptr);
+
+ 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_tm_spd_tar, "ptrace_tm_spd_tar");
+}
--
2.1.0
--
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| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 17:00 +0200 |
| Subject | [PATCH V9 25/28] selftests, powerpc: Add ptrace tests for VSX, VMX registers in TM |
| Message-ID | <qhkPN-6FW-43@gated-at.bofh.it> |
| In reply to | #1242452 |
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>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 3 +-
.../selftests/powerpc/ptrace/ptrace-tm-vsx.c | 196 +++++++++++++++++++++
2 files changed, 198 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 1c5437e..092fbef 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)
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..7ab46d7
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-vsx.c
@@ -0,0 +1,196 @@
+/*
+ * 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 int *cptr, *pptr;
+
+extern void loadvsx(void *p, int tmp);
+extern 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 = (int *)shmat(shm_id, NULL, 0);
+trans:
+ asm __volatile__(
+ "bl load_vsx_ckpt;"
+
+ "1: ;"
+ TBEGIN
+ "beq 2f;"
+
+ "bl load_vsx;"
+ "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)
+ : "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);
+ }
+ exit(1);
+}
+
+int trace_tm_vsx(pid_t child)
+{
+ unsigned long vsx[VSX_MAX];
+ unsigned long vmx[VMX_MAX + 2][2];
+ int ret;
+
+ sleep(1);
+ 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;
+
+ 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) * 1, 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 = (int *)shmat(shm_id, NULL, 0);
+ ret = trace_tm_vsx(pid);
+ if (ret) {
+ kill(pid, SIGKILL);
+ return TEST_FAIL;
+ }
+
+ pptr[0] = 1;
+ shmdt((void *)pptr);
+ 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_tm_vsx, "ptrace_tm_vsx");
+}
--
2.1.0
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
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Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 17:00 +0200 |
| Subject | [PATCH V9 18/28] selftests, powerpc: Add ptrace tests for GPR/FPR registers |
| Message-ID | <qhkPN-6FW-45@gated-at.bofh.it> |
| In reply to | #1242452 |
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>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 5 +-
.../testing/selftests/powerpc/ptrace/ptrace-gpr.c | 191 +++++++++++++++++++
.../testing/selftests/powerpc/ptrace/ptrace-gpr.h | 73 ++++++++
tools/testing/selftests/powerpc/ptrace/ptrace.S | 131 +++++++++++++
tools/testing/selftests/powerpc/ptrace/ptrace.h | 208 +++++++++++++++++++++
5 files changed, 606 insertions(+), 2 deletions(-)
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 59386ba..dfeb36e 100644
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -1,7 +1,8 @@
-TEST_PROGS := ptrace-ebb
+TEST_PROGS := ptrace-ebb ptrace-gpr
+
all: $(TEST_PROGS)
-$(TEST_PROGS): ../harness.c
+$(TEST_PROGS): ../harness.c ptrace.S
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-gpr.c b/tools/testing/selftests/powerpc/ptrace/ptrace-gpr.c
new file mode 100644
index 0000000..f84f0e4
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-gpr.c
@@ -0,0 +1,191 @@
+/*
+ * 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;
+
+extern void store_gpr(unsigned long *addr);
+extern 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"
+ );
+
+ while(!cptr[0]);
+
+ 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;
+
+ sleep(1);
+ 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) * 1, 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);
+ ret = trace_gpr(pid);
+ if (ret) {
+ kill(pid, SIGTERM);
+ return TEST_FAIL;
+ }
+
+ pptr[0] = 1;
+ shmdt((void *)pptr);
+
+ 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_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..6d49f1f
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-gpr.h
@@ -0,0 +1,73 @@
+/*
+ * 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 44256d2..439fb65 100644
--- a/tools/testing/selftests/powerpc/ptrace/ptrace.h
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace.h
@@ -157,6 +157,214 @@ 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)
{
--
2.1.0
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| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 17:00 +0200 |
| Subject | [PATCH V9 13/28] powerpc, ptrace: Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR |
| Message-ID | <qhkPN-6FW-49@gated-at.bofh.it> |
| In reply to | #1242452 |
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>
---
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 45aa204..44aedfb 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -1688,6 +1688,78 @@ 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.
*/
@@ -1713,6 +1785,13 @@ 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[] = {
@@ -1789,6 +1868,25 @@ 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 = {
@@ -2056,6 +2154,25 @@ 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 = {
--
2.1.0
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| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 17:00 +0200 |
| Subject | [PATCH V9 20/28] selftests, powerpc: Add ptrace tests for GPR/FPR registers in suspended TM |
| Message-ID | <qhkPN-6FW-51@gated-at.bofh.it> |
| In reply to | #1242452 |
This patch adds ptrace interface test for GPR/FPR registers
inside suspended TM context.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 2 +-
.../selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c | 319 +++++++++++++++++++++
2 files changed, 320 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 4d7cbe8..a8fa080 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)
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..2c73b0d
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c
@@ -0,0 +1,319 @@
+/*
+ * 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;
+
+extern void store_gpr(unsigned long *addr);
+extern 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)
+{
+ 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:
+ 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;
+
+ 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);
+ }
+ exit(1);
+}
+
+int trace_tm_spd_gpr(pid_t child)
+{
+ unsigned long gpr[18];
+ unsigned long fpr[32];
+ int ret;
+
+ sleep(1);
+ 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;
+
+ 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) * 2, 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;
+
+ ret = trace_tm_spd_gpr(pid);
+ if (ret) {
+ kill(pid, SIGTERM);
+ return TEST_FAIL;
+ }
+
+ pptr[0] = 1;
+ pptr[1] = 1;
+ shmdt((void *)pptr);
+
+ 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_tm_spd_gpr, "ptrace_tm_spd_gpr");
+}
--
2.1.0
--
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| From | Anshuman Khandual <khandual@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-10-08 17:00 +0200 |
| Subject | [PATCH V9 22/28] selftests, powerpc: Add ptrace tests for TAR, PPR, DSCR in TM |
| Message-ID | <qhkPN-6FW-53@gated-at.bofh.it> |
| In reply to | #1242452 |
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>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 2 +-
.../selftests/powerpc/ptrace/ptrace-tm-tar.c | 170 +++++++++++++++++++++
2 files changed, 171 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 28d4465..a5d177b 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)
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..45b6fa3
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-tar.c
@@ -0,0 +1,170 @@
+/*
+ * 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 int *cptr, *pptr;
+
+
+void tm_tar(void)
+{
+ unsigned long result, texasr;
+ unsigned long regs[3];
+ int ret;
+
+ cptr = (int *)shmat(shm_id, NULL, 0);
+trans:
+ 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
+ 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)
+ : "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;
+
+ sleep(1);
+ 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);
+
+ 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) * 1, 0777|IPC_CREAT);
+ pid = fork();
+ if (pid == 0)
+ tm_tar();
+
+ pptr = (int *)shmat(shm_id, NULL, 0);
+ pptr[0] = 0;
+
+ if (pid) {
+ ret = trace_tm_tar(pid);
+ if (ret) {
+ kill(pid, SIGTERM);
+ return TEST_FAIL;
+ }
+ pptr[0] = 1;
+ shmdt(&pptr);
+
+ 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_tm_tar, "ptrace_tm_tar");
+}
--
2.1.0
--
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