[PATCH v20 05/11] perf: arm_v7_pmu: Don't disable counter in (armv7|krait_|scorpion_)pmu_enable_event()

Rob Herring (Arm)
2025-02-18T20:40:42Z

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>
---
drivers/perf/arm_v7_pmu.c | 6 ------
1 file changed, 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

--
2.47.2