diff options
| author | Rob Herring (Arm) <robh@kernel.org> | 2025-02-18 14:40:00 -0600 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2025-03-01 05:08:10 +0000 |
| commit | 7bf1001e0d9124ad65642a5bbff76b46a35798f3 (patch) | |
| tree | e172df32a56b146b334b1bba8b37a3180c90ea26 | |
| parent | 7a5387748215c19cee7bd693ebaf336cf9bbbdcb (diff) | |
perf: arm_v7_pmu: Don't disable counter in (armv7|krait_|scorpion_)pmu_enable_event()
Currently (armv7|krait_|scorpion_)pmu_enable_event() start by disabling
the event counter it has been asked to enable. This should not be
necessary as the counter (and the PMU as a whole) should not be active
when *_enable_event() is called.
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-v20-5-4e9922fc2e8e@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
| -rw-r--r-- | drivers/perf/arm_v7_pmu.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/perf/arm_v7_pmu.c b/drivers/perf/arm_v7_pmu.c index 7fa88e3b64e0..17831e1920bd 100644 --- a/drivers/perf/arm_v7_pmu.c +++ b/drivers/perf/arm_v7_pmu.c @@ -857,8 +857,6 @@ static void armv7pmu_enable_event(struct perf_event *event) return; } - armv7_pmnc_disable_counter(idx); - /* * Set event (if destined for PMNx counters) * We only need to set the event for the cycle counter if we @@ -1450,8 +1448,6 @@ static void krait_pmu_enable_event(struct perf_event *event) struct hw_perf_event *hwc = &event->hw; int idx = hwc->idx; - armv7_pmnc_disable_counter(idx); - /* * Set event (if destined for PMNx counters) * We set the event for the cycle counter because we @@ -1762,8 +1758,6 @@ static void scorpion_pmu_enable_event(struct perf_event *event) struct hw_perf_event *hwc = &event->hw; int idx = hwc->idx; - armv7_pmnc_disable_counter(idx); - /* * Set event (if destined for PMNx counters) * We don't set the event for the cycle counter because we |