6.12-stable review patch. If anyone has any objections, please let me know.
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From: Rob Herring (Arm) robh@kernel.org
[ Upstream commit 04bd15c4cbc3f7bd2399d1baab958c5e738dbfc9 ]
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.or... Signed-off-by: Will Deacon will@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/perf/arm_pmuv3.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/perf/arm_pmuv3.c b/drivers/perf/arm_pmuv3.c index 0afe02f879b45..d9b56f0f90942 100644 --- a/drivers/perf/arm_pmuv3.c +++ b/drivers/perf/arm_pmuv3.c @@ -816,10 +816,10 @@ 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)