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| author | Sandipan Das <sandipan.das@amd.com> | 2022-05-19 12:03:32 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-06-13 10:15:13 +0200 |
| commit | 16b48c3f5ed85b8017526b1acacf5115461b489a (patch) | |
| tree | bae03b254bc94f8ce48f65ebe6ffd033c8684cf0 /arch/x86/include/asm/perf_event.h | |
| parent | perf/x86/amd/uncore: Use attr_update for format attributes (diff) | |
| download | linux-16b48c3f5ed85b8017526b1acacf5115461b489a.tar.xz linux-16b48c3f5ed85b8017526b1acacf5115461b489a.zip | |
perf/x86/amd/uncore: Detect available DF counters
If AMD Performance Monitoring Version 2 (PerfMonV2) is
supported, use CPUID leaf 0x80000022 EBX to detect the
number of Data Fabric (DF) PMCs. This offers more
flexibility if the counts change in later processor
families.
Signed-off-by: Sandipan Das <sandipan.das@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/bac7b2806561e03f2acc7fdc9db94f102df80e1d.1652954372.git.sandipan.das@amd.com
Diffstat (limited to 'arch/x86/include/asm/perf_event.h')
| -rw-r--r-- | arch/x86/include/asm/perf_event.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h index 409725e86f42..af157aa74f4e 100644 --- a/arch/x86/include/asm/perf_event.h +++ b/arch/x86/include/asm/perf_event.h @@ -194,6 +194,9 @@ union cpuid_0x80000022_ebx { struct { /* Number of Core Performance Counters */ unsigned int num_core_pmc:4; + unsigned int reserved:6; + /* Number of Data Fabric Counters */ + unsigned int num_df_pmc:6; } split; unsigned int full; }; |