perf/x86/amd/uncore: Detect available DF counters

Browse source

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

...

This commit is contained in:

Sandipan Das 2022-05-19 15:33:32 +05:30 • committed by Peter Zijlstra

parent 847f3268bb

commit 16b48c3f5e

2 changed files with 13 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

10

arch/x86/events/amd/uncore.c

View file

3

arch/x86/include/asm/perf_event.h

View file