From nobody Wed Sep 10 06:01:03 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 D11C830F943; Mon, 8 Sep 2025 16:31:48 +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=1757349108; cv=none; b=JAVeX2oKtucM1kOzku09tq5021jCONvThUq8hrE4qjp5sjeHrK70VcLOHhCc2pLkwFAjB4HPWoHWt4xqN//omePnLZKLX4dYlmb0lTiOByKwtyvgfi4piTKGitpRDU0wTDnZrbD1OqWQXS1FZdVE0yu/8hsVjqWbFJOlySeLPOA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757349108; c=relaxed/simple; bh=sGD9P1+N4V37A0aIJ2eK7vIsS8B9pkkhrv0UN3imJB0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=aORTbp4OLeIEtD/XOF3mPzTCIuDgjbrbrzIjLX+PAFTwvY1NaOs1eWt+iWrxMsRuSeZVS1gQYBdtA18DcBlecYnOaNvbaiSKZ3W2OPu4fwZpoOOFNH2JLnwDavuGhTWKVGla4lIaLjOolsDn1hB+BA+yb/PLwNAx3ZuXHw/DE9I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fXVqCQ1J; 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="fXVqCQ1J" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 737FFC4CEF9; Mon, 8 Sep 2025 16:31:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1757349108; bh=sGD9P1+N4V37A0aIJ2eK7vIsS8B9pkkhrv0UN3imJB0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fXVqCQ1Jd/RLa8F2YRUK+xt2yn1De/nXFfvsfopMCm81ElEXjPFMo6Sm3fwz1DaAu MaL22A9DwFOYImVF5+aveYxYx7SAgGm9CfgPxo2K/QHWJIqb5mYLaIFUsMREcuUSJX ai5YhvLzY+xklsspr4o/Gr/Ct+L/3WUb/5ku6DgGJ/9NAtdmqBBivYa94I/q6EBp6N uhhACdHoPgZBaOpRNJ7TjyY+BL6NMt5mhL4k5w4qWXWvTtmjDYd7Hh9fMiMIfwipBd xXHrpzA4I1V0TvRX9sucdd3MsogG6DRKjCeZ9bAVSuQmzYX3NbzG5d02VOo6/Mt5D+ U93Tcv2DHuOUA== 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 1uvemQ-00000004NTm-1IZA; Mon, 08 Sep 2025 16:31:46 +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 03/25] of/irq: Add IRQ affinity reporting interface Date: Mon, 8 Sep 2025 17:31:05 +0100 Message-Id: <20250908163127.2462948-4-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" Plug the irq_populate_fwspec_info() helper into the OF layer to offer an IRQ affinity reporting function. Signed-off-by: Marc Zyngier --- drivers/of/irq.c | 20 ++++++++++++++++++++ include/linux/of_irq.h | 7 +++++++ 2 files changed, 27 insertions(+) diff --git a/drivers/of/irq.c b/drivers/of/irq.c index 74aaea61de13c..cb264f44bd6d8 100644 --- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -479,6 +479,26 @@ int of_irq_get(struct device_node *dev, int index) } EXPORT_SYMBOL_GPL(of_irq_get); =20 +const struct cpumask *of_irq_get_affinity(struct device_node *dev, int ind= ex) +{ + int rc; + struct of_phandle_args oirq; + struct irq_fwspec_info info; + + rc =3D of_irq_parse_one(dev, index, &oirq); + if (rc) + return NULL; + + of_phandle_args_to_fwspec(oirq.np, oirq.args, oirq.args_count, + &info.fwspec); + + if (!irq_populate_fwspec_info(&info) && + info.flags & IRQ_FWSPEC_INFO_AFFINITY_VALID) + return info.affinity; + + return NULL; +} + /** * of_irq_get_byname - Decode a node's IRQ and return it as a Linux IRQ nu= mber * @dev: pointer to device tree node diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h index a480063c9cb19..721cbdbc292df 100644 --- a/include/linux/of_irq.h +++ b/include/linux/of_irq.h @@ -43,6 +43,8 @@ extern int of_irq_parse_one(struct device_node *device, i= nt index, struct of_phandle_args *out_irq); extern int of_irq_count(struct device_node *dev); extern int of_irq_get(struct device_node *dev, int index); +extern const struct cpumask *of_irq_get_affinity(struct device_node *dev, + int index); extern int of_irq_get_byname(struct device_node *dev, const char *name); extern int of_irq_to_resource_table(struct device_node *dev, struct resource *res, int nr_irqs); @@ -77,6 +79,11 @@ static inline int of_irq_get_byname(struct device_node *= dev, const char *name) { return 0; } +static inline const struct cpumask *of_irq_get_affinity(struct device_node= *dev, + int index) +{ + return NULL; +} static inline int of_irq_to_resource_table(struct device_node *dev, struct resource *res, int nr_irqs) { --=20 2.39.2