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 C23B8CCD193 for ; Mon, 20 Oct 2025 12:31:16 +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=BQsWEe5RoNt3yoPdbPOitK4GQHVGGqbTIEFh/4akRaU=; b=y2i4RBhofcK07/2cKR5S8v6cKr OvcIDKfM/B/XSQewd0dI/E2a2yiMBlgnvjEBi2s45B6OUpzAhQkCN7jMVFqZYWEK07EVozfuCml7Y jW5MC3wQYjjv6JXW4aZK5eyv1pgroFPg5AQC/mkuX7SXDWd6gfKvk4HB3NDT5vPQevg829rFTG9zZ h3SzoPorAgXADsvsfKogeAHZlQyY1EK75J5ggX7/fgFaPq0FcwJfy0l3dgoe+1pdYfAhhiyZB4WcO FHmF75jSJpy857O4BwcDt8HJetXYEOUgE6bv4SIMrlzBr2s5mSqUcwWUeRN5YgJW2WCFKMc3Ui2gK ZUEKrqIQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vAp2M-0000000DRx5-3sss; Mon, 20 Oct 2025 12:30:54 +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 1vAp1t-0000000DRDj-0PS5 for linux-arm-kernel@lists.infradead.org; Mon, 20 Oct 2025 12:30:26 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id AF05640177; Mon, 20 Oct 2025 12:30:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8757FC4CEF9; Mon, 20 Oct 2025 12:30:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1760963410; bh=B+YD3r2Pf9GN3kTdiVu6vqT+UCLV1wIqiygl0YRDNGo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GsYxpLjVSsE8rdKqpFQTaPAES/iHOGiKyLxs0ZbE3juopvfzc5qu5wHxPN3/GY5dO L1xUu1+9g3dGqcnX4v6w7XuTI27k+4d37RT/BiaUZn8pSPb7RPQHgWTmZSutnApEK1 CCi9uH2Exh0gdiXQWgQuMegbW2vwAFASj39skhCHy+uy6U2s01gWo8cqkFDJStOYxo YNwxJQgImX0sZukJLdHOQQNqRPm1se8wy81y1hlksF/+VEs0ZfQ5+EeZZa/Tu3lbL0 xilme9eYq5+QEfhUcFH6/9nb+27/x7i+n9vfuryLJjXlgtphtCESfSrJSbaFT4wpmk b5YsdFypNz2GA== 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 1vAp1c-0000000FUu2-2q2N; Mon, 20 Oct 2025 12:30:08 +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 , Jinjie Ruan , Alexandru Elisei Subject: [PATCH v4 05/26] irqchip/gic-v3: Add FW info retrieval support Date: Mon, 20 Oct 2025 13:29:22 +0100 Message-ID: <20251020122944.3074811-6-maz@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251020122944.3074811-1-maz@kernel.org> References: <20251020122944.3074811-1-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, ruanjinjie@huawei.com, alexandru.elisei@arm.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-20251020_053025_248190_AB168CA3 X-CRM114-Status: GOOD ( 18.92 ) 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 new .get_fwspec_info() callback into the GICv3 core driver, using some of the existing PPI affinity handling infrastructure. Tested-by: Will Deacon Signed-off-by: Marc Zyngier --- drivers/irqchip/irq-gic-v3.c | 53 ++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index 3de351e66ee84..cf0ba83c6eda6 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -69,6 +69,8 @@ struct gic_chip_data { bool has_rss; unsigned int ppi_nr; struct partition_desc **ppi_descs; + struct partition_affinity *parts; + unsigned int nr_parts; }; #define T241_CHIPS_MAX 4 @@ -1797,11 +1799,58 @@ static int gic_irq_domain_select(struct irq_domain *d, return d == partition_get_domain(gic_data.ppi_descs[ppi_idx]); } +static int gic_irq_get_fwspec_info(struct irq_fwspec *fwspec, struct irq_fwspec_info *info) +{ + const struct cpumask *mask = NULL; + + info->flags = 0; + info->affinity = NULL; + + /* ACPI is not capable of describing PPI affinity -- yet */ + if (!is_of_node(fwspec->fwnode)) + return 0; + + /* If the specifier provides an affinity, use it */ + if (fwspec->param_count == 4 && fwspec->param[3]) { + struct fwnode_handle *fw; + + switch (fwspec->param[0]) { + case 1: /* PPI */ + case 3: /* EPPI */ + break; + default: + return 0; + } + + fw = of_fwnode_handle(of_find_node_by_phandle(fwspec->param[3])); + if (!fw) + return -ENOENT; + + for (int i = 0; i < gic_data.nr_parts; i++) { + if (gic_data.parts[i].partition_id == fw) { + mask = &gic_data.parts[i].mask; + break; + } + } + + if (!mask) + return -ENOENT; + } else { + mask = cpu_possible_mask; + } + + info->affinity = mask; + info->flags = IRQ_FWSPEC_INFO_AFFINITY_VALID; + + return 0; +} + static const struct irq_domain_ops gic_irq_domain_ops = { .translate = gic_irq_domain_translate, .alloc = gic_irq_domain_alloc, .free = gic_irq_domain_free, .select = gic_irq_domain_select, + .get_fwspec_info = gic_irq_get_fwspec_info, }; static int partition_domain_translate(struct irq_domain *d, @@ -1840,6 +1889,7 @@ static int partition_domain_translate(struct irq_domain *d, static const struct irq_domain_ops partition_domain_ops = { .translate = partition_domain_translate, .select = gic_irq_domain_select, + .get_fwspec_info = gic_irq_get_fwspec_info, }; static bool gic_enable_quirk_msm8996(void *data) @@ -2232,6 +2282,9 @@ static void __init gic_populate_ppi_partitions(struct device_node *gic_node) part_idx++; } + gic_data.parts = parts; + gic_data.nr_parts = nr_parts; + for (i = 0; i < gic_data.ppi_nr; i++) { unsigned int irq; struct partition_desc *desc; -- 2.47.3