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: Olof Johansson <olof@lixom.net> Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
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@ -771,6 +771,21 @@ static void pmu_write_counter(struct perf_event *event, u32 value)
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pmu_write_register(cci_pmu, value, idx, CCI_PMU_CNTR);
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}
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static void __maybe_unused
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pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
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{
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int i;
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struct cci_pmu_hw_events *cci_hw = &cci_pmu->hw_events;
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for_each_set_bit(i, mask, cci_pmu->num_cntrs) {
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struct perf_event *event = cci_hw->events[i];
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if (WARN_ON(!event))
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continue;
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pmu_write_counter(event, local64_read(&event->hw.prev_count));
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}
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}
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static u64 pmu_event_update(struct perf_event *event)
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{
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struct hw_perf_event *hwc = &event->hw;
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