From nobody Wed Apr 1 11:00:53 2026 Received: from LO0P265CU003.outbound.protection.outlook.com (mail-uksouthazon11022078.outbound.protection.outlook.com [52.101.96.78]) (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 017D13AA19D; Mon, 30 Mar 2026 22:11:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=52.101.96.78 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774908671; cv=fail; b=pu/MqjydlRQs1Ne4LBdjYnIpI8qBU8XmpIwt1itL4vyL0VBIi6bd4K4pml0R90nkPoBSqR+u1fiXkKxaWzSRR1wjSv8UUBdHEzyidoGvj2UY94YUzAlqZwbbv9S/VFjcl4OVghtDlSMOpQBYOgCRiglNLCAE+HFUX079ynV6mkc= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774908671; c=relaxed/simple; bh=THpSiGAGqaVKK7VUGXeHeN/dZEVm5lV0Gb50xYFucew=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=krg839TLz57bHxH3J8ya1Da6olLfRkbMwOdrsC8mHbSJMg74FYsLQ3WiIyUh4FrBmz2x6H/N/aqbT5nLULGGNv4G7a0GGRXZEA52JiLVQsd3W9RoT9sWgUfWjaQVQhgn7hYvGhtxk9WmusDSlJ7Xv//LOrlXBXHHhqV+oyUyllI= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=atomlin.com; spf=pass smtp.mailfrom=atomlin.com; arc=fail smtp.client-ip=52.101.96.78 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=atomlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=atomlin.com ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=YnGIyaYofg7F066+WhU+MUK4dw0vxhFsLX/9gyN/SE42SeIQh/zS9iDTPLgxTV/JJ73hwMIDkaPr/jMmjJIZhuxhwBuE5eyWO+kfFkuT/eMHaCKXYJm8g4j0nkuSbbV9rxCLRBKz2myZZSXC1W4Dde8a0drpCtHoiYk7UbTWutQYySSBpDa81Dwxr1cJDab9rB6/q/DXbskWrYwcAafhvc5+lHSwG2AHm9Cnom+kVojBNUES9dV2wLNYENZKLMQsU0i3JCQG5QPXIFA/q1CwrO4c6CUdyAcn8BIGf9Nw+Al497pP3YcGK43o7kRftPK26dbyljeL+MaJcYANYzhIuQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=Z3fH192XZWmJdTfEcIr3Tf37LB1pME6rTt3OO7j//a8=; b=jjBho6wcYrxa7z5Kz25Wpmfi6sGTr7PhNoBfZHIZwS8S1MkdxiFeh+T71Z7Xru2LhTH8+qZigr+Ic2Xk03XV3Uo4nZd2yEW8SI+3t3okiXoq2CFq2XSLdHT6nzyU2D6aZEUx0KUaGCKj5VMPf41rbEQ45eoYOvbuxNTUUY6uIG3sAPve53OkDoq7Pd7pv1R1/cl3MAh4X0RtTK1v+B5BrEw1sKk+bPORHIuIwQv6qX0YOyhhBJbH4gD2zA+0RERhezd2qgSR65WIMpaY7m657AQTFC9NfpHVopNWERYV1OUnUbzcwFBnT5gPF21y7/aHEeHg3+yrHJ62esc4Lah20Q== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=atomlin.com; dmarc=pass action=none header.from=atomlin.com; dkim=pass header.d=atomlin.com; arc=none Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=atomlin.com; Received: from CWLP123MB3523.GBRP123.PROD.OUTLOOK.COM (2603:10a6:400:70::10) by CWLP123MB6512.GBRP123.PROD.OUTLOOK.COM (2603:10a6:400:186::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9745.28; Mon, 30 Mar 2026 22:11:05 +0000 Received: from CWLP123MB3523.GBRP123.PROD.OUTLOOK.COM ([fe80::de8e:2e4f:6c6:f3bf]) by CWLP123MB3523.GBRP123.PROD.OUTLOOK.COM ([fe80::de8e:2e4f:6c6:f3bf%2]) with mapi id 15.20.9745.022; Mon, 30 Mar 2026 22:11:05 +0000 From: Aaron Tomlin To: axboe@kernel.dk, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me, mst@redhat.com Cc: atomlin@atomlin.com, aacraid@microsemi.com, James.Bottomley@HansenPartnership.com, martin.petersen@oracle.com, liyihang9@h-partners.com, kashyap.desai@broadcom.com, sumit.saxena@broadcom.com, shivasharan.srikanteshwara@broadcom.com, chandrakanth.patil@broadcom.com, sathya.prakash@broadcom.com, sreekanth.reddy@broadcom.com, suganath-prabu.subramani@broadcom.com, ranjan.kumar@broadcom.com, jinpu.wang@cloud.ionos.com, tglx@kernel.org, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, akpm@linux-foundation.org, maz@kernel.org, ruanjinjie@huawei.com, bigeasy@linutronix.de, yphbchou0911@gmail.com, wagi@kernel.org, frederic@kernel.org, longman@redhat.com, chenridong@huawei.com, hare@suse.de, kch@nvidia.com, ming.lei@redhat.com, steve@abita.co, sean@ashe.io, chjohnst@gmail.com, neelx@suse.com, mproche@gmail.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, megaraidlinux.pdl@broadcom.com, mpi3mr-linuxdrv.pdl@broadcom.com, MPT-FusionLinux.pdl@broadcom.com Subject: [PATCH v9 04/13] genirq/affinity: Add cpumask to struct irq_affinity Date: Mon, 30 Mar 2026 18:10:38 -0400 Message-ID: <20260330221047.630206-5-atomlin@atomlin.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260330221047.630206-1-atomlin@atomlin.com> References: <20260330221047.630206-1-atomlin@atomlin.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: BN9PR03CA0575.namprd03.prod.outlook.com (2603:10b6:408:10d::10) To CWLP123MB3523.GBRP123.PROD.OUTLOOK.COM (2603:10a6:400:70::10) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CWLP123MB3523:EE_|CWLP123MB6512:EE_ X-MS-Office365-Filtering-Correlation-Id: af3711a7-91b2-4a70-d12f-08de8ea93cf5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|7416014|366016|56012099003|22082099003|18002099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CWLP123MB3523.GBRP123.PROD.OUTLOOK.COM;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(376014)(7416014)(366016)(56012099003)(22082099003)(18002099003);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?2pfJfiQpo4OJoQos9FxB7ALA5Hk1CV/tfY03EsF0lKicN8yFJU+DTJtBLL0Q?= =?us-ascii?Q?LheoWZpu4QHg5RZ7YrZ8EzRu55hM/foPYUjgyT5dVJLcRX1bAGBipJA1Z3Q/?= =?us-ascii?Q?Mpb46emNvKpbzx1PeeH/UcDeqXFRc5RytX4lYaRcviwLd+jeO65+sJLylRbS?= =?us-ascii?Q?Z+W9MtzAVKHVoM5YWYdsik3lm4uvZfnphEPeaUXB8ilxGt/D8/gJKU0I6IvS?= =?us-ascii?Q?vmS5dUlhgqAKovToa4YkqaEK7B5qaNFjYZSaUlAytRU4a0S+qv5uleXt8D0m?= =?us-ascii?Q?O32bDgvTxEtC4GuJZyToIePN9Nm9km1KuK90v7goXbaQdBLnSlRn9NWI8b0E?= =?us-ascii?Q?mkrUk1IlWV9p1ggF6hr2uGxRNrH6vZv3YqrDOts0SNaNxTiiL9n3MMKjcG4a?= =?us-ascii?Q?6PCJsjp8QQe4KOYsTYVl0ExSRBf4WuZsuc4K1wxy1AoI0IrlBrOdCHqpHTBo?= =?us-ascii?Q?m503QbRi/OGrsZAUGyKH/QuCnkXweOAzddFR4eGKZ5w3uhm8IgpmP5xHXvNn?= =?us-ascii?Q?ZQ1BdTU35UuQqmd8D/0VsZl82p5AH3VO0H/7AHTe1XHsYv4T8ltdc/0XMJkZ?= =?us-ascii?Q?iZj8BWd2/T3wowVgfC7k9euYuoXGwdVYuE+BsBHRpeJKSquq9efn4VIMIHU4?= =?us-ascii?Q?Qcsw29PKxRwPCA/RwdgZHrvHcPAgvwC6hzl9tr75EcQ2SGddSblT7HRMeslE?= =?us-ascii?Q?iQxN26ZULBm98ojcYKi6zOLeR+P4/9McwTipVoQRV+JW6XIs4X796YvWQOoN?= =?us-ascii?Q?j+WJRXrl0rdBjju9VKZq4Vg/9oMs1d2yfREwu+O/08KHMWU+XcWOuP4l2jei?= =?us-ascii?Q?MvHjxkBEvBlOB19Mj6j7NGjDfLUsyxvOt7+t/jRXnjAeN2XNLwddEpvQmCbl?= =?us-ascii?Q?JArKQdcJvDusQaliIXXR3xKudv5sXxs6GAm0/YKlj0L7iTC0+g0tY80s7ziT?= =?us-ascii?Q?/RIAVFxrcDN5Wh3KTEwEPSiVs0ZvVKSfGihh32uDkarE/MZUG1O4TZuFklAo?= =?us-ascii?Q?axSVc7DHIQEQ6l77pKR5THtO3XGi4CobMGiHJNLqE3A9/V/40tPXi7P/pqXR?= =?us-ascii?Q?Gx2+jgCbDeAeMvP84Lvs0ZrMAELjkLQqp3sXeJJRNMEcHwD1q7qEQdyawDOw?= =?us-ascii?Q?J/fMZ+gZnugFWIplp3Ezp8t0FFAlxmhiEZm5/bf0U7jQUKF0wQQKZ1UODVUp?= =?us-ascii?Q?hQcDD/27RomskYaSWBlGEVbjovewXSfa/K2BroMB7xWdd7D3XMMEZnlEgreB?= =?us-ascii?Q?7VM+V32XO/LbrgKOi4a2aUHEFoCIxgofcjjlrTTglEjqglW6B5IfZMtSyJgM?= =?us-ascii?Q?enXTbsviJ0p7UJUCQoHgf38tOFn3z00fDGLr+FL0X6uiys2qYdIh4gp6uCYG?= =?us-ascii?Q?Or9m16kB+K4paWvwrC1JPYKaJi3q/x4YGjCV8/uLXJIAnxF6K33hhp/NQL40?= =?us-ascii?Q?UgFh1CwWTSR3/LyD/NSsq+oLhETnmBs9pKUH+d6kpar0Y0zqYMdu5GFrThlm?= =?us-ascii?Q?7fZ0vuzDvq81zALgaOTR5UTyMbixHgiHDvo5ZGA/aAHEcBDjYAbW7wo1sBS2?= =?us-ascii?Q?mr3shVN62uFpK22gBmIhXYcD4lDPdAKALiun3L/+jyCu3RY8m1gODFboXrBB?= =?us-ascii?Q?EP6pQNqIGrWsZNmgmnBj84QfywWiBGr64nC+OwOkqm/X/DYzvLEW9SIllDjU?= =?us-ascii?Q?nZbK8hNh412wlU/HSZfoMz5gRFTEuRTXRisfj2ZtkMjkdeiSeEVBVb3kUMHw?= =?us-ascii?Q?DxaOonBJEA=3D=3D?= X-OriginatorOrg: atomlin.com X-MS-Exchange-CrossTenant-Network-Message-Id: af3711a7-91b2-4a70-d12f-08de8ea93cf5 X-MS-Exchange-CrossTenant-AuthSource: CWLP123MB3523.GBRP123.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Mar 2026 22:11:05.8304 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: e6a32402-7d7b-4830-9a2b-76945bbbcb57 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: E2IJBF5IaRIOAmAh7iSla9CsL5j6ONS6QYo3HFaOJHrA0syDa37GhPkTM6+fsSUbHOzLlLeEhp/s1Ve0PjdGCA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CWLP123MB6512 Content-Type: text/plain; charset="utf-8" From: Daniel Wagner Pass a cpumask to irq_create_affinity_masks as an additional constraint to consider when creating the affinity masks. This allows the caller to exclude specific CPUs, e.g., isolated CPUs (see the 'isolcpus' kernel command-line parameter). Reviewed-by: Hannes Reinecke Signed-off-by: Daniel Wagner --- include/linux/interrupt.h | 16 ++++++++++------ kernel/irq/affinity.c | 12 ++++++++++-- 2 files changed, 20 insertions(+), 8 deletions(-) diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 6cd26ffb0505..afd5a2c75b43 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -287,18 +287,22 @@ struct irq_affinity_notify { * @nr_sets: The number of interrupt sets for which affinity * spreading is required * @set_size: Array holding the size of each interrupt set + * @mask: cpumask that constrains which CPUs to consider when + * calculating the number and size of the interrupt sets * @calc_sets: Callback for calculating the number and size * of interrupt sets * @priv: Private data for usage by @calc_sets, usually a * pointer to driver/device specific data. */ struct irq_affinity { - unsigned int pre_vectors; - unsigned int post_vectors; - unsigned int nr_sets; - unsigned int set_size[IRQ_AFFINITY_MAX_SETS]; - void (*calc_sets)(struct irq_affinity *, unsigned int nvecs); - void *priv; + unsigned int pre_vectors; + unsigned int post_vectors; + unsigned int nr_sets; + unsigned int set_size[IRQ_AFFINITY_MAX_SETS]; + const struct cpumask *mask; + void (*calc_sets)(struct irq_affinity *, + unsigned int nvecs); + void *priv; }; =20 /** diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c index 85c45cfe7223..076a5ef1e306 100644 --- a/kernel/irq/affinity.c +++ b/kernel/irq/affinity.c @@ -70,7 +70,13 @@ irq_create_affinity_masks(unsigned int nvecs, struct irq= _affinity *affd) */ for (i =3D 0, usedvecs =3D 0; i < affd->nr_sets; i++) { unsigned int nr_masks, this_vecs =3D affd->set_size[i]; - struct cpumask *result =3D group_cpus_evenly(this_vecs, &nr_masks); + struct cpumask *result; + + if (affd->mask) + result =3D group_mask_cpus_evenly(this_vecs, affd->mask, + &nr_masks); + else + result =3D group_cpus_evenly(this_vecs, &nr_masks); =20 if (!result) { kfree(masks); @@ -115,7 +121,9 @@ unsigned int irq_calc_affinity_vectors(unsigned int min= vec, unsigned int maxvec, if (resv > minvec) return 0; =20 - if (affd->calc_sets) { + if (affd->mask) { + set_vecs =3D cpumask_weight(affd->mask); + } else if (affd->calc_sets) { set_vecs =3D maxvec - resv; } else { cpus_read_lock(); --=20 2.51.0