perf/amd/ibs: Limit ldlat->l3missonly dependency to Zen5

Browse source

The ldlat dependency on l3missonly is specific to Zen 5; newer generations
are not affected. This quirk is documented as an erratum in the following
Revision Guide.

  Erratum: 1606 IBS (Instruction Based Sampling) OP Load Latency Filtering
           May Capture Unwanted Samples When L3Miss Filtering is Disabled

  Revision Guide for AMD Family 1Ah Models 00h-0Fh Processors,
  Pub. 58251 Rev. 1.30 July 2025
  https://bugzilla.kernel.org/attachment.cgi?id=309193

Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Link: https://patch.msgid.link/20260216042216.1440-3-ravi.bangoria@amd.com

...

This commit is contained in:

Ravi Bangoria 2026-02-16 04:22:13 +00:00 • committed by Peter Zijlstra

parent 01336b5559

commit 898138efc9

1 changed files with 4 additions and 1 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

5

arch/x86/events/amd/ibs.c

View file