On Mon, Jan 04, 2016 at 11:54:42AM +0000, Suzuki K. Poulose wrote:
> 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 <[email protected]>
> Cc: Punit Agrawal <[email protected]>
> Signed-off-by: Suzuki K. Poulose <[email protected]>
> ---
> 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);
> +}
I don't understand this as-is. Why do all the counters have the same
value?
> +static void __maybe_unused
> +pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask, u32 value)
> +{
> + __pmu_write_counters(cci_pmu, mask, value);
> +}
Why are these not just one function for now?
Mark.
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