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| author | Dapeng Mi <dapeng1.mi@linux.intel.com> | 2026-08-24 16:27:26 +0800 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2026-09-02 13:10:45 +0200 |
| commit | 578460d9af8d5816eff59642a8bb11945026b8d1 (patch) | |
| tree | 4ec3a1aa7d2f562945e5a2d4e36a46e0440dda0f /tools/perf/scripts/python | |
| parent | a2c64c74c02957ca11975b5355e70210f7b934ad (diff) | |
perf/x86: Support eGPRs sampling using sample_regs_* fields
Support sampling of APX eGPRs (R16 ~ R31) via the sample_regs_* fields.
To sample eGPRs, the sample_simd_regs_enabled field must be set. This
allows the spare space (reclaimed from the original XMM space) in the
sample_regs_* fields to be used for representing eGPRs.
The perf_reg_value() function needs to check if the
PERF_SAMPLE_REGS_ABI_SIMD flag is set first, and then determine whether
to output eGPRs or legacy XMM registers to userspace.
The perf_reg_validate() function first checks the simd_enabled argument
to determine if the eGPRs bitmap is represented in sample_regs_* fields.
It then validates the eGPRs bitmap accordingly.
Currently, eGPRs sampling is only supported on the x86_64 architecture, as
APX is only available on x86_64 platforms.
APX eGPRs sampling will be enabled in a subsequent patch that sets
PERF_PMU_CAP_SIMD_REGS.
Suggested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Co-developed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260824082731.1013973-19-dapeng1.mi@linux.intel.com
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions