Ravi Bangoria 2fad201fe3 perf/ibs: Fix interface via core pmu events ... Although, IBS pmus can be invoked via their own interface, indirect IBS invocation via core pmu events is also supported with fixed set of events: cpu-cycles:p, r076:p (same as cpu-cycles:p) and r0C1:p (micro-ops) for user convenience. This indirect IBS invocation is broken since commit 66d258c5b0 ("perf/core: Optimize perf_init_event()"), which added RAW pmu under 'pmu_idr' list and thus if event_init() fails with RAW pmu, it started returning error instead of trying other pmus. Forward precise events from core pmu to IBS by overwriting 'type' and 'config' in the kernel copy of perf_event_attr. Overwriting will cause perf_init_event() to retry with updated 'type' and 'config', which will automatically forward event to IBS pmu. Without patch: $ sudo ./perf record -C 0 -e r076:p -- sleep 1 Error: The r076:p event is not supported. With patch: $ sudo ./perf record -C 0 -e r076:p -- sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.341 MB perf.data (37 samples) ] Fixes: 66d258c5b0 ("perf/core: Optimize perf_init_event()") Reported-by: Stephane Eranian <eranian@google.com> Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20230504110003.2548-3-ravi.bangoria@amd.com		2023-05-08 10:58:30 +02:00
..
brs.c	x86/perf/amd: Remove tracing from perf_lopwr_cb()	2023-01-13 11:03:21 +01:00
core.c	perf/ibs: Fix interface via core pmu events	2023-05-08 10:58:30 +02:00
ibs.c	perf/ibs: Fix interface via core pmu events	2023-05-08 10:58:30 +02:00
iommu.c	x86/events/amd/iommu: Remove redundant assignment to variable shift	2021-12-28 21:30:05 +01:00
iommu.h	IOMMU Updates for Linux v5.13	2021-05-01 09:33:00 -07:00
lbr.c	perf: Rewrite core context handling	2022-10-27 20:12:16 +02:00
Makefile	perf/x86/amd/lbr: Detect LbrExtV2 support	2022-08-27 00:05:43 +02:00
power.c	perf/x86/amd/power: Assign pmu.module	2021-08-26 09:12:57 +02:00
uncore.c	perf/x86/amd/uncore: Fix memory leak for events array	2022-11-09 12:38:01 +01:00