github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-01 11:03:43 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

perf: arm_pmuv3: Call kvm_vcpu_pmu_resync_el0() before enabling counters

Browse Source 
Counting events related to setup of the PMU is not desired, but
kvm_vcpu_pmu_resync_el0() is called just after the PMU counters have
been enabled. Move the call to before enabling the counters.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Tested-by: James Clark <james.clark@linaro.org>
Link: https://lore.kernel.org/r/20250218-arm-brbe-v19-v20-1-4e9922fc2e8e@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Rob Herring (Arm) 2025-02-18 14:39:56 -06:00 committed by Will Deacon
parent 0424b1a81a
commit 04bd15c4cb
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/perf/arm_pmuv3.c
View File

@ -825,10 +825,10 @@ static void armv8pmu_start(struct arm_pmu *cpu_pmu)
else
armv8pmu_disable_user_access();
kvm_vcpu_pmu_resync_el0();
/* Enable all counters */
armv8pmu_pmcr_write(armv8pmu_pmcr_read() | ARMV8_PMU_PMCR_E);
kvm_vcpu_pmu_resync_el0();
}
static void armv8pmu_stop(struct arm_pmu *cpu_pmu)