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

Suzuki K. Poulose
2016-01-04T11:54:42Z

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