[PATCH v5 03/11] arm-cci: Group writes to counter

From	"Suzuki K. Poulose" <suzuki.poulose@arm.com>
Newsgroups	linux.kernel
Subject	[PATCH v5 03/11] arm-cci: Group writes to counter
Date	2016-01-04 13:00 +0100
Message-ID	<qNbXP-2ZX-1@gated-at.bofh.it> (permalink)
References	<qNbXP-2ZX-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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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: Mark Rutland <mark.rutland@arm.com>
Cc: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
---
 drivers/bus/arm-cci.c |   15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index ce0d3ef..f6b8717 100644
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -785,6 +785,21 @@ static void pmu_write_counter(struct perf_event *event, u32 value)
 	__pmu_write_counter(cci_pmu, value, idx);
 }
 
+/* Write a value to a given set of counters */
+static void __pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask, u32 value)
+{
+	int i;
+
+	for_each_set_bit(i, mask, cci_pmu->num_cntrs)
+		__pmu_write_counter(cci_pmu, value, i);
+}
+
+static void __maybe_unused
+pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask, u32 value)
+{
+	__pmu_write_counters(cci_pmu, mask, value);
+}
+
 static u64 pmu_event_update(struct perf_event *event)
 {
 	struct hw_perf_event *hwc = &event->hw;
-- 
1.7.9.5

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[PATCH v5 03/11] arm-cci: Group writes to counter "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2016-01-04 13:00 +0100
  Re: [PATCH v5 03/11] arm-cci: Group writes to counter Mark Rutland <mark.rutland@arm.com> - 2016-01-04 20:10 +0100
    Re: [PATCH v5 03/11] arm-cci: Group writes to counter "Suzuki K. Poulose" <Suzuki.Poulose@arm.com> - 2016-01-05 12:00 +0100
      Re: [PATCH v5 03/11] arm-cci: Group writes to counter Mark Rutland <mark.rutland@arm.com> - 2016-01-11 11:50 +0100
        Re: [PATCH v5 03/11] arm-cci: Group writes to counter "Suzuki K. Poulose" <Suzuki.Poulose@arm.com> - 2016-01-11 11:50 +0100

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