| Message ID | 20230531040428.501523-2-anshuman.khandual@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64/perf: Enable branch stack sampling | expand |
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 >
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