mbox series

[v3,0/3] perf/x86/amd: Miscellaneous fixes

Message ID cover.1706526029.git.sandipan.das@amd.com
Headers
Series perf/x86/amd: Miscellaneous fixes |

Message

Sandipan Das Jan. 29, 2024, 11:06 a.m. UTC 
  Contains fixes w.r.t usage of LBR Freeze, Erratum 1452 and a bug in the
CPU offline path where PMU-related registers are reset.

Previous versions can be found at:
v2: https://lore.kernel.org/all/cover.1704103399.git.sandipan.das@amd.com/
v1: https://lore.kernel.org/all/cover.1702833179.git.sandipan.das@amd.com/

Changes in v3:
 - As suggested by Boris, update the commit message of the first patch
   with the reason behind making the LBR and PMC Freeze feature bit
   visible in /proc/cpuinfo.

Changes in v2:
 - Make the LBR and PMC Freeze feature bit visible in /proc/cpuinfo. As
   suggested by Stephane, this will be useful to determine if it is
   feasible to perform kernel FDO on a system.

Sandipan Das (3):
  perf/x86/amd/lbr: Use freeze based on availability
  perf/x86/amd/lbr: Discard erroneous branch entries
  perf/x86/amd/core: Avoid register reset when CPU is dead

 arch/x86/events/amd/core.c         |  5 ++---
 arch/x86/events/amd/lbr.c          | 22 ++++++++++++++--------
 arch/x86/include/asm/cpufeatures.h |  2 +-
 arch/x86/kernel/cpu/scattered.c    |  1 +
 4 files changed, 18 insertions(+), 12 deletions(-)