From nobody Wed Sep 10 05:59:23 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 669D73112C3; Mon, 8 Sep 2025 16:31:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757349111; cv=none; b=LtuCQEp5mDcBJawMYT24Oc00ZGvI+Qmju1efiazdarkAUbw3Yo9s8H7x2zLV5xKlkfm+OtFnEmJFc1LFhbkyNfTmOVFcFiFU1wwg8XdflFgbIbyxgi+KgNMVnjMmmO3E4Wh/LDZe9ws1oZSvbU5YABTc8Sa5psUGaKXu4HYUYLU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757349111; c=relaxed/simple; bh=sEOwaQI0DOMRXSsbHn/28FN+LFNb2hLejQ1sYBs7F+E=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=OSuJqSYROlGGuHAZv/CWH1Mc5etGN+Sl/PiX0yWDvPvbTSBIUP6GO8GLSwg1SGSql6uMiN8ysfVkI835CsPJQwj5mbX7RX+Si62NOuVxZRhrYomYp6kdxJLQmiOd/2SFFU9v6k7Y6tHfa9/TkytUuI5UUpx+X7FvT6jfaY7m5Ko= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=D3IlUqh5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="D3IlUqh5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D1812C4CEF7; Mon, 8 Sep 2025 16:31:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1757349110; bh=sEOwaQI0DOMRXSsbHn/28FN+LFNb2hLejQ1sYBs7F+E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=D3IlUqh5gqBgjMMhwQO1HFVXgv5q+agMYWsMDTP1qDxoi7uS4qf/u8o8/gSIXoIUT gbyiux5rvF+in9bPiLm10sJV+UoDjn8b2fe/qBInJnyRinzM2bbSpG6H+1D3qyPtc3 ZGYC7AtYqDZaRBCU5UMFs6XviTSps2vw8JWRR/onXdnxcmp3UXT8vKMxTFxSNbPFOJ ZVOzbyXhZZz8L0KO/1xVtoA7K+SNV3CvQGCM+CiR3+VPT4mtTovZC6bP6MdTWp053H r6Tu0ObaNfZc4V6AHuTe2Uks8ndTGKFehAT2ZYM2zsfqeYtLvA2tEpzBdZbpOKG0Q4 LqxFNjXXi9/iA== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1uvemT-00000004NTm-05uU; Mon, 08 Sep 2025 16:31:49 +0000 From: Marc Zyngier To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org Cc: Thomas Gleixner , Mark Rutland , Will Deacon , "Rafael J. Wysocki" , Rob Herring , Saravana Kannan , Greg Kroah-Hartman , Sven Peter , Janne Grunau , Suzuki K Poulose , James Clark Subject: [PATCH 13/25] genirq: Add affinity to percpu_devid interrupt requests Date: Mon, 8 Sep 2025 17:31:15 +0100 Message-Id: <20250908163127.2462948-14-maz@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20250908163127.2462948-1-maz@kernel.org> References: <20250908163127.2462948-1-maz@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, tglx@linutronix.de, mark.rutland@arm.com, will@kernel.org, rafael@kernel.org, robh@kernel.org, saravanak@google.com, gregkh@linuxfoundation.org, sven@kernel.org, j@jannau.net, suzuki.poulose@arm.com, james.clark@linaro.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Content-Type: text/plain; charset="utf-8" Add an affinity field to both the irqaction structure and the interrupt request primitives. Nothing is making use of it yet, and the only value used it NULL, which is used as a shorthand for cpu_possible_mask. This will shortly get used with actual affinities. Signed-off-by: Marc Zyngier --- include/linux/interrupt.h | 5 +++-- kernel/irq/manage.c | 13 ++++++++++--- 2 files changed, 13 insertions(+), 5 deletions(-) diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 0ec1a71ab4e84..52147d5f432b3 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -125,6 +125,7 @@ struct irqaction { void *dev_id; void __percpu *percpu_dev_id; }; + const struct cpumask *affinity; struct irqaction *next; irq_handler_t thread_fn; struct task_struct *thread; @@ -181,7 +182,7 @@ request_any_context_irq(unsigned int irq, irq_handler_t= handler, extern int __must_check __request_percpu_irq(unsigned int irq, irq_handler_t handler, unsigned long flags, const char *devname, - void __percpu *percpu_dev_id); + const cpumask_t *affinity, void __percpu *percpu_dev_id); =20 extern int __must_check request_nmi(unsigned int irq, irq_handler_t handler, unsigned long flags, @@ -192,7 +193,7 @@ request_percpu_irq(unsigned int irq, irq_handler_t hand= ler, const char *devname, void __percpu *percpu_dev_id) { return __request_percpu_irq(irq, handler, 0, - devname, percpu_dev_id); + devname, NULL, percpu_dev_id); } =20 extern int __must_check diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 980725bd93e95..ac394f0b422b8 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -2446,10 +2446,14 @@ static struct irqaction *create_percpu_irqaction(irq_handler_t handler, unsigned long flags, const char *devname, + const cpumask_t *affinity, void __percpu *dev_id) { struct irqaction *action; =20 + if (!affinity) + affinity =3D cpu_possible_mask; + action =3D kzalloc(sizeof(struct irqaction), GFP_KERNEL); if (!action) return NULL; @@ -2458,6 +2462,7 @@ struct irqaction *create_percpu_irqaction(irq_handler= _t handler, action->flags =3D flags | IRQF_PERCPU | IRQF_NO_SUSPEND; action->name =3D devname; action->percpu_dev_id =3D dev_id; + action->affinity =3D affinity; =20 return action; } @@ -2468,6 +2473,7 @@ struct irqaction *create_percpu_irqaction(irq_handler= _t handler, * @handler: Function to be called when the IRQ occurs. * @flags: Interrupt type flags (IRQF_TIMER only) * @devname: An ascii name for the claiming device + * @affinity: A cpumask describing the target CPUs for this interrupt * @dev_id: A percpu cookie passed back to the handler function * * This call allocates interrupt resources, but doesn't enable the interru= pt @@ -2480,7 +2486,7 @@ struct irqaction *create_percpu_irqaction(irq_handler= _t handler, */ int __request_percpu_irq(unsigned int irq, irq_handler_t handler, unsigned long flags, const char *devname, - void __percpu *dev_id) + const cpumask_t *affinity, void __percpu *dev_id) { struct irqaction *action; struct irq_desc *desc; @@ -2497,7 +2503,8 @@ int __request_percpu_irq(unsigned int irq, irq_handle= r_t handler, if (flags && flags !=3D IRQF_TIMER) return -EINVAL; =20 - action =3D create_percpu_irqaction(handler, flags, devname, dev_id); + action =3D create_percpu_irqaction(handler, flags, devname, + affinity, dev_id); if (!action) return -ENOMEM; =20 @@ -2563,7 +2570,7 @@ int request_percpu_nmi(unsigned int irq, irq_handler_= t handler, =20 action =3D create_percpu_irqaction(handler, IRQF_NO_THREAD | IRQF_NOBALANCING, - name, dev_id); + name, NULL, dev_id); if (!action) return -ENOMEM; =20 --=20 2.39.2