[v4] genirq: Add support for percpu_devid IRQ affinity

[PATCH v4 09/26] perf: arm_spe_pmu: Convert to new IRQ affinity retrieval API

Posted by Marc Zyngier 1 month, 3 weeks ago

Now that the relevant interrupt controllers are equipped with
a callback returning the affinity of per-CPU interrupts, switch
the ARM SPE driver over to this new method.

Reviewed-by: Jinjie Ruan <ruanjinjie@huawei.com>
Tested-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 drivers/perf/arm_spe_pmu.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
index fa50645feddad..1460b02d20e8b 100644
--- a/drivers/perf/arm_spe_pmu.c
+++ b/drivers/perf/arm_spe_pmu.c
@@ -1287,8 +1287,10 @@ static void arm_spe_pmu_dev_teardown(struct arm_spe_pmu *spe_pmu)
 static int arm_spe_pmu_irq_probe(struct arm_spe_pmu *spe_pmu)
 {
 	struct platform_device *pdev = spe_pmu->pdev;
-	int irq = platform_get_irq(pdev, 0);
+	const struct cpumask *affinity;
+	int irq;
 
+	irq = platform_get_irq_affinity(pdev, 0, &affinity);
 	if (irq < 0)
 		return -ENXIO;
 
@@ -1297,10 +1299,7 @@ static int arm_spe_pmu_irq_probe(struct arm_spe_pmu *spe_pmu)
 		return -EINVAL;
 	}
 
-	if (irq_get_percpu_devid_partition(irq, &spe_pmu->supported_cpus)) {
-		dev_err(&pdev->dev, "failed to get PPI partition (%d)\n", irq);
-		return -EINVAL;
-	}
+	cpumask_copy(&spe_pmu->supported_cpus, affinity);
 
 	spe_pmu->irq = irq;
 	return 0;
-- 
2.47.3

Re: [PATCH v4 09/26] perf: arm_spe_pmu: Convert to new IRQ affinity retrieval API

Posted by Jonathan Cameron 1 month ago

On Mon, 20 Oct 2025 13:29:26 +0100
Marc Zyngier <maz@kernel.org> wrote:

> Now that the relevant interrupt controllers are equipped with
> a callback returning the affinity of per-CPU interrupts, switch
> the ARM SPE driver over to this new method.
> 
> Reviewed-by: Jinjie Ruan <ruanjinjie@huawei.com>
> Tested-by: Will Deacon <will@kernel.org>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>

[tip: irq/core] perf: arm_spe_pmu: Convert to new interrupt affinity retrieval API

Posted by tip-bot2 for Marc Zyngier 1 month, 2 weeks ago

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     f6c8aced7c24e0c765d4283144d280c3f36e3906
Gitweb:        https://git.kernel.org/tip/f6c8aced7c24e0c765d4283144d280c3f36e3906
Author:        Marc Zyngier <maz@kernel.org>
AuthorDate:    Mon, 20 Oct 2025 13:29:26 +01:00
Committer:     Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Mon, 27 Oct 2025 17:16:33 +01:00

perf: arm_spe_pmu: Convert to new interrupt affinity retrieval API

Now that the relevant interrupt controllers are equipped with a callback
returning the affinity of per-CPU interrupts, switch the ARM SPE driver
over to this new method.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Will Deacon <will@kernel.org>
Reviewed-by: Jinjie Ruan <ruanjinjie@huawei.com>
Link: https://patch.msgid.link/20251020122944.3074811-10-maz@kernel.org
---
 drivers/perf/arm_spe_pmu.c |  9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
index fa50645..1460b02 100644
--- a/drivers/perf/arm_spe_pmu.c
+++ b/drivers/perf/arm_spe_pmu.c
@@ -1287,8 +1287,10 @@ static void arm_spe_pmu_dev_teardown(struct arm_spe_pmu *spe_pmu)
 static int arm_spe_pmu_irq_probe(struct arm_spe_pmu *spe_pmu)
 {
 	struct platform_device *pdev = spe_pmu->pdev;
-	int irq = platform_get_irq(pdev, 0);
+	const struct cpumask *affinity;
+	int irq;
 
+	irq = platform_get_irq_affinity(pdev, 0, &affinity);
 	if (irq < 0)
 		return -ENXIO;
 
@@ -1297,10 +1299,7 @@ static int arm_spe_pmu_irq_probe(struct arm_spe_pmu *spe_pmu)
 		return -EINVAL;
 	}
 
-	if (irq_get_percpu_devid_partition(irq, &spe_pmu->supported_cpus)) {
-		dev_err(&pdev->dev, "failed to get PPI partition (%d)\n", irq);
-		return -EINVAL;
-	}
+	cpumask_copy(&spe_pmu->supported_cpus, affinity);
 
 	spe_pmu->irq = irq;
 	return 0;