6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ilkka Koskinen ilkka@os.amperecomputing.com
commit 15c7ef7341a2e54cfa12ac502c65d6fd2cce2b62 upstream.
Coresight PMU driver didn't reject events meant for other PMUs. This caused some of the Core PMU events disappearing from the output of "perf list". In addition, trying to run e.g.
$ perf stat -e r2 sleep 1
made Coresight PMU driver to handle the event instead of letting Core PMU driver to deal with it.
Cc: stable@vger.kernel.org Fixes: e37dfd65731d ("perf: arm_cspmu: Add support for ARM CoreSight PMU driver") Signed-off-by: Ilkka Koskinen ilkka@os.amperecomputing.com Acked-by: Will Deacon will@kernel.org Reviewed-by: Besar Wicaksono bwicaksono@nvidia.com Acked-by: Mark Rutland mark.rutland@arm.com Reviewed-by: Anshuman Khandual anshuman.khandual@arm.com Link: https://lore.kernel.org/r/20231103001654.35565-1-ilkka@os.amperecomputing.co... Signed-off-by: Catalin Marinas catalin.marinas@arm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/perf/arm_cspmu/arm_cspmu.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/perf/arm_cspmu/arm_cspmu.c +++ b/drivers/perf/arm_cspmu/arm_cspmu.c @@ -635,6 +635,9 @@ static int arm_cspmu_event_init(struct p
cspmu = to_arm_cspmu(event->pmu);
+ if (event->attr.type != event->pmu->type) + return -ENOENT; + /* * Following other "uncore" PMUs, we do not support sampling mode or * attach to a task (per-process mode).