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From: Ilkka Koskinen <ilkka@os.amperecomputing.com>
To: Jonathan Corbet <corbet@lwn.net>, Will Deacon <will@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Besar Wicaksono <bwicaksono@nvidia.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Robin Murphy <robin.murphy@arm.com>
Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Ilkka Koskinen <ilkka@os.amperecomputing.com>
Subject: [PATCH v2 4/5] perf: arm_cspmu: Support implementation specific event validation
Date: Wed, 31 May 2023 20:01:43 -0700	[thread overview]
Message-ID: <20230601030144.3458136-5-ilkka@os.amperecomputing.com> (raw)
In-Reply-To: <20230601030144.3458136-1-ilkka@os.amperecomputing.com>

Some platforms may use e.g. different filtering mechanism and, thus,
may need different way to validate the events.

Signed-off-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
---
 drivers/perf/arm_cspmu/arm_cspmu.c | 4 ++++
 drivers/perf/arm_cspmu/arm_cspmu.h | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/arm_cspmu.c
index b4c4ef81c719..a26f484e06b1 100644
--- a/drivers/perf/arm_cspmu/arm_cspmu.c
+++ b/drivers/perf/arm_cspmu/arm_cspmu.c
@@ -593,6 +593,10 @@ static int arm_cspmu_get_event_idx(struct arm_cspmu_hw_events *hw_events,
 	if (idx >= cspmu->num_logical_ctrs)
 		return -EAGAIN;
 
+	if (cspmu->impl.ops.validate_event &&
+	    !cspmu->impl.ops.validate_event(cspmu, event))
+		return -EAGAIN;
+
 	set_bit(idx, hw_events->used_ctrs);
 
 	return idx;
diff --git a/drivers/perf/arm_cspmu/arm_cspmu.h b/drivers/perf/arm_cspmu/arm_cspmu.h
index 4a29b921f7e8..0e5c316c96f9 100644
--- a/drivers/perf/arm_cspmu/arm_cspmu.h
+++ b/drivers/perf/arm_cspmu/arm_cspmu.h
@@ -106,6 +106,8 @@ struct arm_cspmu_impl_ops {
 	void (*set_ev_filter)(struct arm_cspmu *cspmu,
 			      struct hw_perf_event *hwc,
 			      u32 filter);
+	/* Implementation specific event validation */
+	bool (*validate_event)(struct arm_cspmu *cspmu, struct perf_event *new);
 	/* Hide/show unsupported events */
 	umode_t (*event_attr_is_visible)(struct kobject *kobj,
 					 struct attribute *attr, int unused);
-- 
2.40.1


WARNING: multiple messages have this Message-ID (diff)
From: Ilkka Koskinen <ilkka@os.amperecomputing.com>
To: Jonathan Corbet <corbet@lwn.net>, Will Deacon <will@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Besar Wicaksono <bwicaksono@nvidia.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Robin Murphy <robin.murphy@arm.com>
Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Ilkka Koskinen <ilkka@os.amperecomputing.com>
Subject: [PATCH v2 4/5] perf: arm_cspmu: Support implementation specific event validation
Date: Wed, 31 May 2023 20:01:43 -0700	[thread overview]
Message-ID: <20230601030144.3458136-5-ilkka@os.amperecomputing.com> (raw)
In-Reply-To: <20230601030144.3458136-1-ilkka@os.amperecomputing.com>

Some platforms may use e.g. different filtering mechanism and, thus,
may need different way to validate the events.

Signed-off-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
---
 drivers/perf/arm_cspmu/arm_cspmu.c | 4 ++++
 drivers/perf/arm_cspmu/arm_cspmu.h | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/arm_cspmu.c
index b4c4ef81c719..a26f484e06b1 100644
--- a/drivers/perf/arm_cspmu/arm_cspmu.c
+++ b/drivers/perf/arm_cspmu/arm_cspmu.c
@@ -593,6 +593,10 @@ static int arm_cspmu_get_event_idx(struct arm_cspmu_hw_events *hw_events,
 	if (idx >= cspmu->num_logical_ctrs)
 		return -EAGAIN;
 
+	if (cspmu->impl.ops.validate_event &&
+	    !cspmu->impl.ops.validate_event(cspmu, event))
+		return -EAGAIN;
+
 	set_bit(idx, hw_events->used_ctrs);
 
 	return idx;
diff --git a/drivers/perf/arm_cspmu/arm_cspmu.h b/drivers/perf/arm_cspmu/arm_cspmu.h
index 4a29b921f7e8..0e5c316c96f9 100644
--- a/drivers/perf/arm_cspmu/arm_cspmu.h
+++ b/drivers/perf/arm_cspmu/arm_cspmu.h
@@ -106,6 +106,8 @@ struct arm_cspmu_impl_ops {
 	void (*set_ev_filter)(struct arm_cspmu *cspmu,
 			      struct hw_perf_event *hwc,
 			      u32 filter);
+	/* Implementation specific event validation */
+	bool (*validate_event)(struct arm_cspmu *cspmu, struct perf_event *new);
 	/* Hide/show unsupported events */
 	umode_t (*event_attr_is_visible)(struct kobject *kobj,
 					 struct attribute *attr, int unused);
-- 
2.40.1


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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2023-06-01  3:03 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-06-01  3:01 [PATCH v2 0/5] perf: ampere: Add support for Ampere SoC PMUs Ilkka Koskinen
2023-06-01  3:01 ` Ilkka Koskinen
2023-06-01  3:01 ` [PATCH v2 1/5] perf: arm_cspmu: Support 32-bit accesses to 64-bit registers Ilkka Koskinen
2023-06-01  3:01   ` Ilkka Koskinen
2023-06-01 14:49   ` Robin Murphy
2023-06-01 14:49     ` Robin Murphy
2023-06-02  6:47     ` Ilkka Koskinen
2023-06-02  6:47       ` Ilkka Koskinen
2023-06-01  3:01 ` [PATCH v2 2/5] perf: arm_cspmu: Support shared interrupts Ilkka Koskinen
2023-06-01  3:01   ` Ilkka Koskinen
2023-06-01 14:54   ` Robin Murphy
2023-06-01 14:54     ` Robin Murphy
2023-06-02  7:04     ` Ilkka Koskinen
2023-06-02  7:04       ` Ilkka Koskinen
2023-06-02 11:25       ` Robin Murphy
2023-06-02 11:25         ` Robin Murphy
2023-06-01  3:01 ` [PATCH v2 3/5] perf: arm_cspmu: Support implementation specific filters Ilkka Koskinen
2023-06-01  3:01   ` Ilkka Koskinen
2023-06-01  3:01 ` Ilkka Koskinen [this message]
2023-06-01  3:01   ` [PATCH v2 4/5] perf: arm_cspmu: Support implementation specific event validation Ilkka Koskinen
2023-06-01 15:09   ` Robin Murphy
2023-06-01 15:09     ` Robin Murphy
2023-06-02  7:09     ` Ilkka Koskinen
2023-06-02  7:09       ` Ilkka Koskinen
2023-06-01  3:01 ` [PATCH v2 5/5] perf: arm_cspmu: ampere_cspmu: Add support for Ampere SoC PMU Ilkka Koskinen
2023-06-01  3:01   ` Ilkka Koskinen
2023-06-01 15:23   ` Robin Murphy
2023-06-01 15:23     ` Robin Murphy
2023-06-02  7:13     ` Ilkka Koskinen
2023-06-02  7:13       ` Ilkka Koskinen
2023-06-02 11:51       ` Robin Murphy
2023-06-02 11:51         ` Robin Murphy
2023-06-03  1:16   ` kernel test robot
2023-06-03  1:16     ` kernel test robot

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