[v4] genirq: Add support for percpu_devid IRQ affinity

[PATCH v4 19/26] perf: arm_spe_pmu: Request specific affinities for percpu IRQ

Posted by Marc Zyngier 1 month, 3 weeks ago

Let the SPE driver request IRQs with an affinity mask matching
the SPE implementation affinity.

Tested-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 drivers/perf/arm_spe_pmu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
index 1460b02d20e8b..87908f0712c0c 100644
--- a/drivers/perf/arm_spe_pmu.c
+++ b/drivers/perf/arm_spe_pmu.c
@@ -1259,8 +1259,8 @@ static int arm_spe_pmu_dev_init(struct arm_spe_pmu *spe_pmu)
 		return -ENXIO;
 
 	/* Request our PPIs (note that the IRQ is still disabled) */
-	ret = request_percpu_irq(spe_pmu->irq, arm_spe_pmu_irq_handler, DRVNAME,
-				 spe_pmu->handle);
+	ret = request_percpu_irq_affinity(spe_pmu->irq, arm_spe_pmu_irq_handler,
+					  DRVNAME, mask, spe_pmu->handle);
 	if (ret)
 		return ret;
 
-- 
2.47.3

Re: [PATCH v4 19/26] perf: arm_spe_pmu: Request specific affinities for percpu IRQ

Posted by Jonathan Cameron 1 month ago

On Mon, 20 Oct 2025 13:29:36 +0100
Marc Zyngier <maz@kernel.org> wrote:

> Let the SPE driver request IRQs with an affinity mask matching
> the SPE implementation affinity.
> 
> Tested-by: Will Deacon <will@kernel.org>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>

> ---
>  drivers/perf/arm_spe_pmu.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
> index 1460b02d20e8b..87908f0712c0c 100644
> --- a/drivers/perf/arm_spe_pmu.c
> +++ b/drivers/perf/arm_spe_pmu.c
> @@ -1259,8 +1259,8 @@ static int arm_spe_pmu_dev_init(struct arm_spe_pmu *spe_pmu)
>  		return -ENXIO;
>  
>  	/* Request our PPIs (note that the IRQ is still disabled) */
> -	ret = request_percpu_irq(spe_pmu->irq, arm_spe_pmu_irq_handler, DRVNAME,
> -				 spe_pmu->handle);
> +	ret = request_percpu_irq_affinity(spe_pmu->irq, arm_spe_pmu_irq_handler,
> +					  DRVNAME, mask, spe_pmu->handle);
>  	if (ret)
>  		return ret;
>

[tip: irq/core] perf: arm_spe_pmu: Request specific affinities for per CPU interrupts

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:     f8112d29ba992e51e4789844340f7da4bdca5fcb
Gitweb:        https://git.kernel.org/tip/f8112d29ba992e51e4789844340f7da4bdca5fcb
Author:        Marc Zyngier <maz@kernel.org>
AuthorDate:    Mon, 20 Oct 2025 13:29:36 +01:00
Committer:     Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Mon, 27 Oct 2025 17:16:36 +01:00

perf: arm_spe_pmu: Request specific affinities for per CPU interrupts

Let the SPE driver request interrupts with an affinity mask matching the SPE
implementation affinity.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Will Deacon <will@kernel.org>
Link: https://patch.msgid.link/20251020122944.3074811-20-maz@kernel.org
---
 drivers/perf/arm_spe_pmu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
index 1460b02..87908f0 100644
--- a/drivers/perf/arm_spe_pmu.c
+++ b/drivers/perf/arm_spe_pmu.c
@@ -1259,8 +1259,8 @@ static int arm_spe_pmu_dev_init(struct arm_spe_pmu *spe_pmu)
 		return -ENXIO;
 
 	/* Request our PPIs (note that the IRQ is still disabled) */
-	ret = request_percpu_irq(spe_pmu->irq, arm_spe_pmu_irq_handler, DRVNAME,
-				 spe_pmu->handle);
+	ret = request_percpu_irq_affinity(spe_pmu->irq, arm_spe_pmu_irq_handler,
+					  DRVNAME, mask, spe_pmu->handle);
 	if (ret)
 		return ret;