From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7DD7ACAC5AC for ; Mon, 22 Sep 2025 08:29:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ZaY5cbb70+3FiAAjNfTSatmXmX0YiIVOVUVDwXpgnE4=; b=sNIYFiuk8JQ3Dpslw478xda/ft FEsihn/RbycR8Qa676FZMj0eJ9mvzgWkZ27Vhiin0qvcvzI245mTYxe0r7KzMtdg7xS5zcHm7vooB Bt59MWqQtiRN5Ul4d8T6z3K5zxxgbIa/rKjPkOcQgm2gxVUvR1k3WmJSw6vmvQ7z5HSqjjeJ/xVMA TYicbNZf91ep47ZjWauoceRp3MmZd4OLsSEjcNb5fdB9D1tiaakhKoePoAr+MlG2SP/s5UwhaBiN2 Z+fK1yzvPfThUAiNSOYhirskuc3OqOWNT+llIhBihrjN4fleLlsogb1oL83k+NajT2UDNp5gdk6D+ 4MlDaaWQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1v0bun-00000009hny-01Eo; Mon, 22 Sep 2025 08:28:53 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1v0bue-00000009hfA-40D9 for linux-arm-kernel@lists.infradead.org; Mon, 22 Sep 2025 08:28:46 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 79B5D44C44; Mon, 22 Sep 2025 08:28:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4FE0BC116B1; Mon, 22 Sep 2025 08:28:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1758529724; bh=uObPw0S3mvMocs9YeKVqpsEPMH1H13oQXDA2ZL7fzjY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RViPu+oh+Pi7lWBLz2vkZCF9YKlTi7HdzTxcjfDwADvDAYsqf864Amflf/vQRN2hZ I1WuSgTKgtCBMtYiOuk1caJKYvaJ/lxKpqqUmc9JwbKhGMdERAIyXt+E/js07yMwuy dQtAjUw+4FpY9XBkBIvS2eiIJSTqRzQAb24MmAwXfLOiNCIaqM3bCd0nui+5nCDVt+ BJmc8IOZWugNsQEDyuBdmU2oHIQ4tvsyWu3aXkr39Cpt83SsaRHQhK9pjtUHFvGVHv i+WLw26pWozDuTexOcSOpr4CEXsaYkXTidoqIfyKaLnfNTeqdBX43xsOK7bbktA1DG xoarUu6R2FK5w== 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 1v0buc-00000008Kds-0yLT; Mon, 22 Sep 2025 08:28:42 +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 , Jonathan Cameron Subject: [PATCH v3 02/26] ACPI: irq: Add IRQ affinity reporting interface Date: Mon, 22 Sep 2025 09:28:09 +0100 Message-ID: <20250922082833.2038905-3-maz@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20250922082833.2038905-1-maz@kernel.org> References: <20250922082833.2038905-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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, jonathan.cameron@huawei.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250922_012845_037242_279F6BBB X-CRM114-Status: GOOD ( 13.84 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Plug the irq_populate_fwspec_info() helper into the ACPI layer to offer an IRQ affinity reporting function. This is currently only supported for the CONFIG_ACPI_GENERIC_GSI configurations, but could later be extended to legacy architectures if necessary. Signed-off-by: Marc Zyngier --- drivers/acpi/irq.c | 19 +++++++++++++++++++ include/linux/acpi.h | 7 +++++++ 2 files changed, 26 insertions(+) diff --git a/drivers/acpi/irq.c b/drivers/acpi/irq.c index 76a856c32c4d0..d1595156c86a4 100644 --- a/drivers/acpi/irq.c +++ b/drivers/acpi/irq.c @@ -300,6 +300,25 @@ int acpi_irq_get(acpi_handle handle, unsigned int index, struct resource *res) } EXPORT_SYMBOL_GPL(acpi_irq_get); +const struct cpumask *acpi_irq_get_affinity(acpi_handle handle, + unsigned int index) +{ + struct irq_fwspec_info info; + struct irq_fwspec fwspec; + unsigned long flags; + + if (acpi_irq_parse_one(handle, index, &fwspec, &flags)) + return NULL; + + if (irq_populate_fwspec_info(&fwspec, &info)) + return NULL; + + if (!(info.flags & IRQ_FWSPEC_INFO_AFFINITY_VALID)) + return NULL; + + return info.affinity; +} + /** * acpi_set_irq_model - Setup the GSI irqdomain information * @model: the value assigned to acpi_irq_model diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 1c5bb1e887cd1..c506ae4bacc86 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -1509,12 +1509,19 @@ static inline int acpi_parse_spcr(bool enable_earlycon, bool enable_console) #if IS_ENABLED(CONFIG_ACPI_GENERIC_GSI) int acpi_irq_get(acpi_handle handle, unsigned int index, struct resource *res); +const struct cpumask *acpi_irq_get_affinity(acpi_handle handle, + unsigned int index); #else static inline int acpi_irq_get(acpi_handle handle, unsigned int index, struct resource *res) { return -EINVAL; } +static inline const struct cpumask *acpi_irq_get_affinity(acpi_handle handle, + unsigned int index) +{ + return NULL; +} #endif #ifdef CONFIG_ACPI_LPIT -- 2.47.3