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

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Message-ID: <20251112183144.00005d06@huawei.com>
Date: Wed, 12 Nov 2025 18:31:44 +0000
From: Jonathan Cameron <jonathan.cameron@...wei.com>
To: Marc Zyngier <maz@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-acpi@...r.kernel.org>, Thomas Gleixner <tglx@...utronix.de>, "Mark
 Rutland" <mark.rutland@....com>, Will Deacon <will@...nel.org>, "Rafael J.
 Wysocki" <rafael@...nel.org>, Rob Herring <robh@...nel.org>, "Saravana
 Kannan" <saravanak@...gle.com>, Greg Kroah-Hartman
	<gregkh@...uxfoundation.org>, Sven Peter <sven@...nel.org>, Janne Grunau
	<j@...nau.net>, Suzuki K Poulose <suzuki.poulose@....com>, James Clark
	<james.clark@...aro.org>, Jinjie Ruan <ruanjinjie@...wei.com>, "Alexandru
 Elisei" <alexandru.elisei@....com>
Subject: Re: [PATCH v4 19/26] perf: arm_spe_pmu: Request specific affinities
 for percpu IRQ

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

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