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Commit a53eb5c6 authored by Suzuki K Poulose's avatar Suzuki K Poulose Committed by Will Deacon
Browse files

arm-cci: Group writes to counter 



Add a helper to group the writes to PMU counter, this will be
used to delay setting the event period to pmu::pmu_enable()

Cc: Punit Agrawal <punit.agrawal@arm.com>
Acked-by: default avatarOlof Johansson <olof@lixom.net>
Acked-by: default avatarMark Rutland <mark.rutland@arm.com>
Signed-off-by: default avatarSuzuki K. Poulose <suzuki.poulose@arm.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 0f17380c

drivers/bus/arm-cci.c

+15 −0
Original line number Diff line number Diff line
@@ -771,6 +771,21 @@ static void pmu_write_counter(struct perf_event *event, u32 value) 
		pmu_write_register(cci_pmu, value, idx, CCI_PMU_CNTR);

}



static void __maybe_unused

pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask)

{

	int i;

	struct cci_pmu_hw_events *cci_hw = &cci_pmu->hw_events;



	for_each_set_bit(i, mask, cci_pmu->num_cntrs) {

		struct perf_event *event = cci_hw->events[i];



		if (WARN_ON(!event))

			continue;

		pmu_write_counter(event, local64_read(&event->hw.prev_count));

	}

}



static u64 pmu_event_update(struct perf_event *event)

{

	struct hw_perf_event *hwc = &event->hw;