perf/x86/amd: add LBR capture support outside of hardware events
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- v1 Latest4 patches 4 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/4 | perf/x86/amd: Ensure amd_pmu_core_disable_all() is always inlinedarch/ | +1 | 0 replies | |
| 2/4 | perf/x86/amd: Avoid taking branches before disabling LBRarch/ arch/ | +14 | 0 replies | |
| 3/4 | perf/x86/amd: Support capturing LBR from software eventsarch/ | +35 | 0 replies | |
| 4/4 | perf/x86/amd: Don't reject non-sampling events with configured LBRarch/ | +0 | 0 replies |
Reviews trailers per patch
All 4 patches have a Reviewed-by or Acked-by.
| Patch | Sandipan Das |
|---|---|
| 1/4 | R-b |
| 2/4 | R-b |
| 3/4 | R-b |
| 4/4 | R-b |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH 6.6.y 0/4] perf/x86/amd: add LBR capture support outside of hardware events
Hi all,
This backport wires up AMD perfmon v2 so BPF and other software clients can snapshot LBR stacks on demand, similar to the Intel support upstream. The series keeps the LBR-freeze path branchless, adds the perf_snapshot_branch_stack callback for AMD, and drops the sampling-only restriction now that snapshots can be taken from software contexts.
Leon Hwang (4):
perf/x86/amd: Ensure amd_pmu_core_disable_all() is always inlined perf/x86/amd: Avoid taking branches before disabling LBR perf/x86/amd: Support capturing LBR from software events perf/x86/amd: Don't reject non-sampling events with configured LBR
arch/x86/events/amd/core.c | 37 +++++++++++++++++++++++++++++++++++- arch/x86/events/amd/lbr.c | 13 +------------ arch/x86/events/perf_event.h | 13 +++++++++++++ 3 files changed, 50 insertions(+), 13 deletions(-)
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2.52.0