From: Andi Kleen ak@linux.intel.com
mainline inclusion from mainline-v5.2-rc1 commit ca138a7aabc68bf727918bb40ce08157cd5ec0a5 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I47H3V CVE: NA
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commit ca138a7aabc68bf727918bb40ce08157cd5ec0a5 upstream.
Icelake and later platforms support collecting XMM registers with PEBS event.
Add support for 'perf script' to dump them, and support for the register parser in 'perf record -I=' ... to configure them.
For now they are just printed in hex, we could potentially later add other formats too.
Committer testing:
Before:
# perf record -IXMM0 Warning: unknown register XMM0, check man page or run 'perf record -I?'
Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>]
# # perf record -I? available registers: AX BX CX DX SI DI BP SP IP FLAGS CS SS R8 R9 R10 R11 R12 R13 R14 R15
Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>] #
After:
# perf record -IXMM0 Error: The sys_perf_event_open() syscall returned with 22 (Invalid argument) for event (cycles). /bin/dmesg | grep -i perf may provide additional information.
# # perf record -I? available registers: AX BX CX DX SI DI BP SP IP FLAGS CS SS R8 R9 R10 R11 R12 R13 R14 R15 XMM0 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 XMM9 XMM10 XMM11 XMM12 XMM13 XMM14 XMM15
Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>]
-I, --intr-regs[=<any register>] sample selected machine registers on interrupt, use -I ? to list register names #
More work is needed to, when faced with such error, warn the user that that register is not available on the running platform.
Signed-off-by: Andi Kleen ak@linux.intel.com Tested-by: Arnaldo Carvalho de Melo acme@redhat.com Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: Jiri Olsa jolsa@kernel.org Cc: Peter Zijlstra peterz@infradead.org Link: http://lkml.kernel.org/r/20190506141926.13659-1-kan.liang@linux.intel.com Signed-off-by: Kan Liang kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Shen, Xiaochen xiaochen.shen@intel.com Signed-off-by: Jackie Liu liuyun01@kylinos.cn Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Reviewed-by: Yang Jihong yangjihong1@huawei.com Reviewed-by: Xie XiuQi xiexiuqi@huawei.com Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- tools/perf/arch/x86/include/perf_regs.h | 25 +++++++++++++++++++++++-- tools/perf/arch/x86/util/perf_regs.c | 16 ++++++++++++++++ tools/perf/util/perf_regs.h | 1 + 3 files changed, 40 insertions(+), 2 deletions(-)
diff --git a/tools/perf/arch/x86/include/perf_regs.h b/tools/perf/arch/x86/include/perf_regs.h index 7f6d538f8a89..b7321337d100 100644 --- a/tools/perf/arch/x86/include/perf_regs.h +++ b/tools/perf/arch/x86/include/perf_regs.h @@ -8,9 +8,9 @@
void perf_regs_load(u64 *regs);
+#define PERF_REGS_MAX PERF_REG_X86_XMM_MAX #ifndef HAVE_ARCH_X86_64_SUPPORT #define PERF_REGS_MASK ((1ULL << PERF_REG_X86_32_MAX) - 1) -#define PERF_REGS_MAX PERF_REG_X86_32_MAX #define PERF_SAMPLE_REGS_ABI PERF_SAMPLE_REGS_ABI_32 #else #define REG_NOSUPPORT ((1ULL << PERF_REG_X86_DS) | \ @@ -18,7 +18,6 @@ void perf_regs_load(u64 *regs); (1ULL << PERF_REG_X86_FS) | \ (1ULL << PERF_REG_X86_GS)) #define PERF_REGS_MASK (((1ULL << PERF_REG_X86_64_MAX) - 1) & ~REG_NOSUPPORT) -#define PERF_REGS_MAX PERF_REG_X86_64_MAX #define PERF_SAMPLE_REGS_ABI PERF_SAMPLE_REGS_ABI_64 #endif #define PERF_REG_IP PERF_REG_X86_IP @@ -77,6 +76,28 @@ static inline const char *perf_reg_name(int id) case PERF_REG_X86_R15: return "R15"; #endif /* HAVE_ARCH_X86_64_SUPPORT */ + +#define XMM(x) \ + case PERF_REG_X86_XMM ## x: \ + case PERF_REG_X86_XMM ## x + 1: \ + return "XMM" #x; + XMM(0) + XMM(1) + XMM(2) + XMM(3) + XMM(4) + XMM(5) + XMM(6) + XMM(7) + XMM(8) + XMM(9) + XMM(10) + XMM(11) + XMM(12) + XMM(13) + XMM(14) + XMM(15) +#undef XMM default: return NULL; } diff --git a/tools/perf/arch/x86/util/perf_regs.c b/tools/perf/arch/x86/util/perf_regs.c index fead6b3b4206..71d7604dbf0b 100644 --- a/tools/perf/arch/x86/util/perf_regs.c +++ b/tools/perf/arch/x86/util/perf_regs.c @@ -31,6 +31,22 @@ const struct sample_reg sample_reg_masks[] = { SMPL_REG(R14, PERF_REG_X86_R14), SMPL_REG(R15, PERF_REG_X86_R15), #endif + SMPL_REG2(XMM0, PERF_REG_X86_XMM0), + SMPL_REG2(XMM1, PERF_REG_X86_XMM1), + SMPL_REG2(XMM2, PERF_REG_X86_XMM2), + SMPL_REG2(XMM3, PERF_REG_X86_XMM3), + SMPL_REG2(XMM4, PERF_REG_X86_XMM4), + SMPL_REG2(XMM5, PERF_REG_X86_XMM5), + SMPL_REG2(XMM6, PERF_REG_X86_XMM6), + SMPL_REG2(XMM7, PERF_REG_X86_XMM7), + SMPL_REG2(XMM8, PERF_REG_X86_XMM8), + SMPL_REG2(XMM9, PERF_REG_X86_XMM9), + SMPL_REG2(XMM10, PERF_REG_X86_XMM10), + SMPL_REG2(XMM11, PERF_REG_X86_XMM11), + SMPL_REG2(XMM12, PERF_REG_X86_XMM12), + SMPL_REG2(XMM13, PERF_REG_X86_XMM13), + SMPL_REG2(XMM14, PERF_REG_X86_XMM14), + SMPL_REG2(XMM15, PERF_REG_X86_XMM15), SMPL_REG_END };
diff --git a/tools/perf/util/perf_regs.h b/tools/perf/util/perf_regs.h index f732e3af2bd4..9f9b25bf7106 100644 --- a/tools/perf/util/perf_regs.h +++ b/tools/perf/util/perf_regs.h @@ -12,6 +12,7 @@ struct sample_reg { uint64_t mask; }; #define SMPL_REG(n, b) { .name = #n, .mask = 1ULL << (b) } +#define SMPL_REG2(n, b) { .name = #n, .mask = 3ULL << (b) } #define SMPL_REG_END { .name = NULL }
extern const struct sample_reg sample_reg_masks[];