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| author | Rob Herring (Arm) <robh@kernel.org> | 2025-02-18 14:39:56 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-04 14:42:04 +0200 |
| commit | 1ae981c91dc26b20d7dd539cad88aaeab0868f32 (patch) | |
| tree | 1b73cc9f014431eda44b9f7f120074d31f6ef97a /drivers/perf | |
| parent | 372ed2171031d35b98329045e57ef561ee63ac8f (diff) | |
| download | linux-1ae981c91dc26b20d7dd539cad88aaeab0868f32.tar.gz linux-1ae981c91dc26b20d7dd539cad88aaeab0868f32.tar.bz2 linux-1ae981c91dc26b20d7dd539cad88aaeab0868f32.zip | |
perf: arm_pmuv3: Call kvm_vcpu_pmu_resync_el0() before enabling counters
[ 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.org
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/perf')
| -rw-r--r-- | drivers/perf/arm_pmuv3.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/perf/arm_pmuv3.c b/drivers/perf/arm_pmuv3.c index 0e8f54168cb6..0858e6096453 100644 --- a/drivers/perf/arm_pmuv3.c +++ b/drivers/perf/arm_pmuv3.c @@ -751,10 +751,10 @@ 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) |