[V11,01/10] drivers: perf: arm_pmu: Add new sched_task() callback
Commit Message
This adds armpmu_sched_task(), as generic pmu's sched_task() override which
in turn can utilize a new arm_pmu.sched_task() callback when available from
the arm_pmu instance. This new callback will be used while enabling BRBE in
ARMV8 PMU.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Tested-by: James Clark <james.clark@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
drivers/perf/arm_pmu.c | 9 +++++++++
include/linux/perf/arm_pmu.h | 1 +
2 files changed, 10 insertions(+)
Comments
On Wed, May 31, 2023 at 09:34:19AM +0530, Anshuman Khandual wrote:
> This adds armpmu_sched_task(), as generic pmu's sched_task() override which
> in turn can utilize a new arm_pmu.sched_task() callback when available from
> the arm_pmu instance. This new callback will be used while enabling BRBE in
> ARMV8 PMU.
>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will@kernel.org>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-kernel@vger.kernel.org
> Tested-by: James Clark <james.clark@arm.com>
> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
> ---
> drivers/perf/arm_pmu.c | 9 +++++++++
> include/linux/perf/arm_pmu.h | 1 +
> 2 files changed, 10 insertions(+)
>
> diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c
> index 15bd1e34a88e..aada47e3b126 100644
> --- a/drivers/perf/arm_pmu.c
> +++ b/drivers/perf/arm_pmu.c
> @@ -517,6 +517,14 @@ static int armpmu_event_init(struct perf_event *event)
> return __hw_perf_event_init(event);
> }
>
> +static void armpmu_sched_task(struct perf_event_pmu_context *pmu_ctx, bool sched_in)
> +{
> + struct arm_pmu *armpmu = to_arm_pmu(pmu_ctx->pmu);
> +
> + if (armpmu->sched_task)
> + armpmu->sched_task(pmu_ctx, sched_in);
> +}
> +
> static void armpmu_enable(struct pmu *pmu)
> {
> struct arm_pmu *armpmu = to_arm_pmu(pmu);
> @@ -858,6 +866,7 @@ struct arm_pmu *armpmu_alloc(void)
> }
>
> pmu->pmu = (struct pmu) {
> + .sched_task = armpmu_sched_task,
> .pmu_enable = armpmu_enable,
> .pmu_disable = armpmu_disable,
> .event_init = armpmu_event_init,
> diff --git a/include/linux/perf/arm_pmu.h b/include/linux/perf/arm_pmu.h
> index 525b5d64e394..f7fbd162ca4c 100644
> --- a/include/linux/perf/arm_pmu.h
> +++ b/include/linux/perf/arm_pmu.h
> @@ -100,6 +100,7 @@ struct arm_pmu {
> void (*stop)(struct arm_pmu *);
> void (*reset)(void *);
> int (*map_event)(struct perf_event *event);
> + void (*sched_task)(struct perf_event_pmu_context *pmu_ctx, bool sched_in);
> int num_events;
> bool secure_access; /* 32-bit ARM only */
> #define ARMV8_PMUV3_MAX_COMMON_EVENTS 0x40
> --
> 2.25.1
>
@@ -517,6 +517,14 @@ static int armpmu_event_init(struct perf_event *event)
return __hw_perf_event_init(event);
}
+static void armpmu_sched_task(struct perf_event_pmu_context *pmu_ctx, bool sched_in)
+{
+ struct arm_pmu *armpmu = to_arm_pmu(pmu_ctx->pmu);
+
+ if (armpmu->sched_task)
+ armpmu->sched_task(pmu_ctx, sched_in);
+}
+
static void armpmu_enable(struct pmu *pmu)
{
struct arm_pmu *armpmu = to_arm_pmu(pmu);
@@ -858,6 +866,7 @@ struct arm_pmu *armpmu_alloc(void)
}
pmu->pmu = (struct pmu) {
+ .sched_task = armpmu_sched_task,
.pmu_enable = armpmu_enable,
.pmu_disable = armpmu_disable,
.event_init = armpmu_event_init,
@@ -100,6 +100,7 @@ struct arm_pmu {
void (*stop)(struct arm_pmu *);
void (*reset)(void *);
int (*map_event)(struct perf_event *event);
+ void (*sched_task)(struct perf_event_pmu_context *pmu_ctx, bool sched_in);
int num_events;
bool secure_access; /* 32-bit ARM only */
#define ARMV8_PMUV3_MAX_COMMON_EVENTS 0x40