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| author | Rob Herring (Arm) <robh@kernel.org> | 2025-02-18 23:39:56 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2025-03-01 08:08:10 +0300 |
| commit | 04bd15c4cbc3f7bd2399d1baab958c5e738dbfc9 (patch) | |
| tree | ed9fd0e08e9da24869a40cf0b09f6acd03ce7c22 | |
| parent | 0424b1a81a42cbb3e5ac71ecaec83c8273cd96ce (diff) | |
| download | linux-04bd15c4cbc3f7bd2399d1baab958c5e738dbfc9.tar.xz | |
perf: arm_pmuv3: Call kvm_vcpu_pmu_resync_el0() before enabling counters
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>
| -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 3785522a08e7..ab070d525751 100644 --- a/drivers/perf/arm_pmuv3.c +++ b/drivers/perf/arm_pmuv3.c @@ -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) |