diff options
| author | Kan Liang <kan.liang@linux.intel.com> | 2023-01-04 23:13:45 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2023-01-09 14:22:08 +0300 |
| commit | eb467aaac21e133a3d01c48c0a6bf43756b06e78 (patch) | |
| tree | 607cf74d86120fda94328468aa427a7234393460 /arch/x86/include/asm/perf_event.h | |
| parent | a018d2e3d4b1abc4a3cb64415c5d204fc5d2eafd (diff) | |
| download | linux-eb467aaac21e133a3d01c48c0a6bf43756b06e78.tar.xz | |
perf/x86/intel: Support Architectural PerfMon Extension leaf
The new CPUID leaf 0x23 reports the "true view" of PMU resources.
The sub-leaf 1 reports the available general-purpose counters and fixed
counters. Update the number of counters and fixed counters when the
sub-leaf is detected.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230104201349.1451191-5-kan.liang@linux.intel.com
Diffstat (limited to 'arch/x86/include/asm/perf_event.h')
| -rw-r--r-- | arch/x86/include/asm/perf_event.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h index 5d0f6891ae61..6496bdbcac98 100644 --- a/arch/x86/include/asm/perf_event.h +++ b/arch/x86/include/asm/perf_event.h @@ -160,6 +160,14 @@ union cpuid10_edx { }; /* + * Intel "Architectural Performance Monitoring extension" CPUID + * detection/enumeration details: + */ +#define ARCH_PERFMON_EXT_LEAF 0x00000023 +#define ARCH_PERFMON_NUM_COUNTER_LEAF_BIT 0x1 +#define ARCH_PERFMON_NUM_COUNTER_LEAF 0x1 + +/* * Intel Architectural LBR CPUID detection/enumeration details: */ union cpuid28_eax { |