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Message-Id: <20230315051444.1683170-2-anshuman.khandual@arm.com>
Date: Wed, 15 Mar 2023 10:44:35 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
will@...nel.org, catalin.marinas@....com, mark.rutland@....com
Cc: Anshuman Khandual <anshuman.khandual@....com>,
Mark Brown <broonie@...nel.org>,
James Clark <james.clark@....com>,
Rob Herring <robh@...nel.org>, Marc Zyngier <maz@...nel.org>,
Suzuki Poulose <suzuki.poulose@....com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
linux-perf-users@...r.kernel.org
Subject: [PATCH V9 01/10] drivers: perf: arm_pmu: Add new sched_task() callback
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@....com>
Cc: Will Deacon <will@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@....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
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