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SubjectRe: [PATCH 1/3] perf, tools: Add support for recording and printing XMM registers
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Hi Arnaldo and Jirka,

Have you got a chance to review this patch series?

This series is user space tool support for Icelake and Tremont.

Thanks,
Kan

On 4/16/2019 11:24 AM, kan.liang@linux.intel.com wrote:
> From: Andi Kleen <ak@linux.intel.com>
>
> 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, could potentially add
> other formats too.
>
> Signed-off-by: Andi Kleen <ak@linux.intel.com>
> Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
> ---
> tools/arch/x86/include/uapi/asm/perf_regs.h | 23 ++++++++++++++++++-
> 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 +
> 4 files changed, 62 insertions(+), 3 deletions(-)
>
> diff --git a/tools/arch/x86/include/uapi/asm/perf_regs.h b/tools/arch/x86/include/uapi/asm/perf_regs.h
> index f3329cabce5c..ac67bbea10ca 100644
> --- a/tools/arch/x86/include/uapi/asm/perf_regs.h
> +++ b/tools/arch/x86/include/uapi/asm/perf_regs.h
> @@ -27,8 +27,29 @@ enum perf_event_x86_regs {
> PERF_REG_X86_R13,
> PERF_REG_X86_R14,
> PERF_REG_X86_R15,
> -
> + /* These are the limits for the GPRs. */
> PERF_REG_X86_32_MAX = PERF_REG_X86_GS + 1,
> PERF_REG_X86_64_MAX = PERF_REG_X86_R15 + 1,
> +
> + /* These all need two bits set because they are 128bit */
> + PERF_REG_X86_XMM0 = 32,
> + PERF_REG_X86_XMM1 = 34,
> + PERF_REG_X86_XMM2 = 36,
> + PERF_REG_X86_XMM3 = 38,
> + PERF_REG_X86_XMM4 = 40,
> + PERF_REG_X86_XMM5 = 42,
> + PERF_REG_X86_XMM6 = 44,
> + PERF_REG_X86_XMM7 = 46,
> + PERF_REG_X86_XMM8 = 48,
> + PERF_REG_X86_XMM9 = 50,
> + PERF_REG_X86_XMM10 = 52,
> + PERF_REG_X86_XMM11 = 54,
> + PERF_REG_X86_XMM12 = 56,
> + PERF_REG_X86_XMM13 = 58,
> + PERF_REG_X86_XMM14 = 60,
> + PERF_REG_X86_XMM15 = 62,
> +
> + /* These include both GPRs and XMMX registers */
> + PERF_REG_X86_XMM_MAX = PERF_REG_X86_XMM15 + 2,
> };
> #endif /* _ASM_X86_PERF_REGS_H */
> 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 c9319f8d17a6..1a15a4bfc28d 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[];
>

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