[PATCH v19 06/11] perf: apple_m1: Don't disable counter in m1_pmu_enable_event()
Anshuman Khandual
anshuman.khandual at arm.com
Mon Feb 3 00:10:20 PST 2025
On 2/3/25 06:13, Rob Herring (Arm) wrote:
> Currently m1_pmu_enable_event() starts 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
> m1_pmu_enable_event() is called.
>
> Cc: Marc Zyngier <maz at kernel.org>
> Signed-off-by: Rob Herring (Arm) <robh at kernel.org>
> ---
> drivers/perf/apple_m1_cpu_pmu.c | 4 ----
> 1 file changed, 4 deletions(-)
>
> diff --git a/drivers/perf/apple_m1_cpu_pmu.c b/drivers/perf/apple_m1_cpu_pmu.c
> index 06fd317529fc..39349ecec3c1 100644
> --- a/drivers/perf/apple_m1_cpu_pmu.c
> +++ b/drivers/perf/apple_m1_cpu_pmu.c
> @@ -396,10 +396,6 @@ static void m1_pmu_enable_event(struct perf_event *event)
> user = event->hw.config_base & M1_PMU_CFG_COUNT_USER;
> kernel = event->hw.config_base & M1_PMU_CFG_COUNT_KERNEL;
>
> - m1_pmu_disable_counter_interrupt(event->hw.idx);
> - m1_pmu_disable_counter(event->hw.idx);
> - isb();
> -
> m1_pmu_configure_counter(event->hw.idx, evt, user, kernel);
> m1_pmu_enable_counter(event->hw.idx);
> m1_pmu_enable_counter_interrupt(event->hw.idx);
>
Reviewed-by: Anshuman Khandual <anshuman.khandual at arm.com>
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