diff options
| author | Dapeng Mi <dapeng1.mi@linux.intel.com> | 2026-08-24 16:27:25 +0800 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2026-09-02 13:10:45 +0200 |
| commit | a2c64c74c02957ca11975b5355e70210f7b934ad (patch) | |
| tree | 50c5dec4d73718e95dae029b0e94dfe72ec7037d /kernel/events | |
| parent | 74d55a827e31bc8a75fbc530951c6266d043ecc0 (diff) | |
perf: Enhance perf_reg_validate() with simd_enabled argument
The upcoming patch will support x86 APX eGPRs sampling by using the
reclaimed XMM register space to represent eGPRs in sample_regs_* fields.
To differentiate between XMM and eGPRs in sample_regs_* fields, an
additional argument, simd_enabled, is introduced to the
perf_reg_validate() helper. If simd_enabled is set to 1, it indicates
that eGPRs are represented in sample_regs_* fields for the x86 platform;
otherwise, XMM registers are represented.
Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260824082731.1013973-18-dapeng1.mi@linux.intel.com
Diffstat (limited to 'kernel/events')
| -rw-r--r-- | kernel/events/core.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 2f84f5018369..e053d8c8a794 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -7823,7 +7823,7 @@ u64 __weak perf_reg_value(struct pt_regs *regs, int idx) return 0; } -int __weak perf_reg_validate(u64 mask) +int __weak perf_reg_validate(u64 mask, bool simd_enabled) { return mask ? -ENOSYS : 0; } @@ -13804,7 +13804,8 @@ static int perf_copy_attr(struct perf_event_attr __user *uattr, } if (attr->sample_type & PERF_SAMPLE_REGS_USER) { - ret = perf_reg_validate(attr->sample_regs_user); + ret = perf_reg_validate(attr->sample_regs_user, + attr->sample_simd_regs_enabled); if (ret) return ret; if (attr->sample_simd_regs_enabled) { @@ -13836,7 +13837,8 @@ static int perf_copy_attr(struct perf_event_attr __user *uattr, attr->sample_max_stack = sysctl_perf_event_max_stack; if (attr->sample_type & PERF_SAMPLE_REGS_INTR) { - ret = perf_reg_validate(attr->sample_regs_intr); + ret = perf_reg_validate(attr->sample_regs_intr, + attr->sample_simd_regs_enabled); if (ret) return ret; if (attr->sample_simd_regs_enabled) { |