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(parent: 847f326) | patch
perf/x86/amd/uncore: Detect available DF counters
authorSandipan Das <sandipan.das@amd.com>
Thu, 19 May 2022 10:03:32 +0000 (15:33 +0530)
committerPeter Zijlstra <peterz@infradead.org>
Mon, 13 Jun 2022 08:15:13 +0000 (10:15 +0200)
commit16b48c3f5ed85b8017526b1acacf5115461b489a
treebae03b254bc94f8ce48f65ebe6ffd033c8684cf0tree | snapshot
parent847f3268bb644ee852732f8e3b5748e4319244b7commit | diff
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
arch/x86/events/amd/uncore.c diff | blob | blame | history
arch/x86/include/asm/perf_event.h diff | blob | blame | history
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git