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 09EF2C02192 for ; Mon, 3 Feb 2025 17:51:55 +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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:CC:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=MkUkIUuSNGZdR/mRtv2PlkXnSm1sbXomDOYETl6hgh8=; b=0dPPf/u5/K3pN98H9yZ19wR4xb /Mz9UwqXti+zokOmQBf+EfVX0yMmQaW0/O/fv0oQSo3fTe6qMOiimQZgzbbbH7ytEt6NuU9TTbzp9 GaSx3gfTNx+jWGKzUnuk9nowSrmJYUeoWCTA1uuXxKgdVSBRpmebftiWwcqfN44J+fcATnJVEglYC 6D0tnuteAtZ+HPKz0modHJyZ5SlieAL+LVdYc7JTuFcD+gwA/kGHUiDD3lngM1hIUEOifa/7wrpGp VcLHlQ6IC7KIAvYxNM04qMK6W4aEEJjsjxoojS+kA0GQapAci1s7JClX0a86pA30v7oa30P2nl9VZ yChDxYxg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tf0bo-0000000GBEI-3mgk; Mon, 03 Feb 2025 17:51:44 +0000 Received: from mail-co1nam11on20624.outbound.protection.outlook.com ([2a01:111:f403:2416::624] helo=NAM11-CO1-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tf0ZM-0000000GApn-01qm for linux-arm-kernel@lists.infradead.org; Mon, 03 Feb 2025 17:49:13 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=pRG/fOgx0d0ChGc4ZbPyUgbWJFKWWG+NixGnAnnXLmgd4+uBAgzrWI/Mymu6/EoX1ei470KUTWkFR4+SJSIwzHrraK2VDciF/IVu3YanWsK3m4rgxPgl+zby83ETwOdHPwhQFEYhT9vANLj/7rS78CqrO3A0A3b3UmpgsmEcfGqsSM20LLIP8PdfCGJOG7dpJa6ebp03DziDGrCRzDQWkcAAO8Ht0z6+4aQJlZXGAVXQJ5NRIAXWuUtOuOD1tP6LGJ9vDkJVxCwXpUmhH81Y09+doJSZBQ2oHvfvskQ78cPeH873YdMdMti90PtQh9czLmrH5rSYT+77ZVb75vMhGQ== 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=MkUkIUuSNGZdR/mRtv2PlkXnSm1sbXomDOYETl6hgh8=; b=YSG/TPNLidXFMcEfPBAsLyBQTdekNwPuwD7LFDaKK/QKZvv1TZhJXfkWcnMVYAk/vtUEBxjUq4SzjjMr21UxnGqaV8OT6wKf6NxLSiY7KkynaAt17m9z8mNxhCPviUYufB2ekRChuCJI+ViDeuFLsDPHKejCfdGBzTgCq3FI8oEE7KognQ4ccoRaus39D/v0J5xmMlbdnXiUrAokqlYj2swOxvg1IgLO7/SMX3cEEl4/qqKx78M/3mOdmkbGhcfT29O3tCcvvlnos5KhbukMCwfkvVegaPnKSPtU076QoOyv3yLgfJl+XqHPkWAq+s96P7eC9Hmh4O/JvDPonBF3Xg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.117.161) smtp.rcpttodomain=redhat.com smtp.mailfrom=nvidia.com; dmarc=pass (p=reject sp=reject pct=100) action=none header.from=nvidia.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=MkUkIUuSNGZdR/mRtv2PlkXnSm1sbXomDOYETl6hgh8=; b=ErolDE1NQP0FgU5wR+Bj3S9bUTnUpUc9qeMaoVjF5biZ8rJFniWFwSTebTq0ETqUbDuioZyVcUoS58ergyAmmSSj8LYl8iaR0bJIbpWbUbxTfUurDrCEcrLiB1l8ACZjS4eqY/udewQHmUWV/H30j66rA85ujUTpPvmp4AmgzC4IXI/tN3JJx3DyvlbEBbj4SRLdVjsDWNuRkkaHZ3uoDmZe5WW12F42hrd0yPeFoTTB9tp1lrr6fJITU6JdYxE4k72eV4dLvXgqFY+KHX8AoSg/xLmzm7Guzx4mmZAdVk0aUZuAMiMeTXFIxMbikT81nw43fU+oDmR8OfWrkbSN5w== Received: from BN1PR12CA0002.namprd12.prod.outlook.com (2603:10b6:408:e1::7) by PH7PR12MB7354.namprd12.prod.outlook.com (2603:10b6:510:20d::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8398.25; Mon, 3 Feb 2025 17:48:58 +0000 Received: from BN1PEPF0000468E.namprd05.prod.outlook.com (2603:10b6:408:e1:cafe::55) by BN1PR12CA0002.outlook.office365.com (2603:10b6:408:e1::7) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8398.25 via Frontend Transport; Mon, 3 Feb 2025 17:48:58 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 216.228.117.161) smtp.mailfrom=nvidia.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.117.161 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.117.161; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.117.161) by BN1PEPF0000468E.mail.protection.outlook.com (10.167.243.139) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8398.14 via Frontend Transport; Mon, 3 Feb 2025 17:48:58 +0000 Received: from rnnvmail202.nvidia.com (10.129.68.7) by mail.nvidia.com (10.129.200.67) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.4; Mon, 3 Feb 2025 09:48:39 -0800 Received: from rnnvmail202.nvidia.com (10.129.68.7) by rnnvmail202.nvidia.com (10.129.68.7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.14; Mon, 3 Feb 2025 09:48:39 -0800 Received: from Asurada-Nvidia (10.127.8.12) by mail.nvidia.com (10.129.68.7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.14 via Frontend Transport; Mon, 3 Feb 2025 09:48:38 -0800 Date: Mon, 3 Feb 2025 09:48:36 -0800 From: Nicolin Chen To: Eric Auger CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH RFCv2 05/13] iommu: Turn fault_data to iommufd private pointer Message-ID: References: <3b26ce04e8ecb5e47f028fe5cae48e5235e68420.1736550979.git.nicolinc@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN1PEPF0000468E:EE_|PH7PR12MB7354:EE_ X-MS-Office365-Filtering-Correlation-Id: e9c00892-17d4-4c30-e578-08dd447b0936 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|82310400026|7416014|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?65X739zJXaDfq8vM1ow0JPkfMe2Qwp4hAqIF5elx9w6jf/+6Hu/O+fW0ZpJN?= =?us-ascii?Q?Czuh0drlSB/5kCMZSCg7rHtj9hW08zdhhuyY96bJx4l5qU/2/ROJgDWcKeR8?= =?us-ascii?Q?q9LCr++G2RmoLDNHlpvOaWLFu7WOn2WrnDlybYWOlmhDm9GQdoeqF0XwChDm?= =?us-ascii?Q?AyQFDIH8r1qMM+7P5eyzj/K65CEbXooIdhb0SH47RaW5Xya7WVYDP+ZMzCkZ?= =?us-ascii?Q?X5WUmDG/JlqZ1uucAGq2zEv0YXa48rOndDzzwzViWGp1XT62MPgHVXUMAPlP?= =?us-ascii?Q?2N34ywDASTcWWk4e6lziYd21ypOc5pjyGiDFjHPm6t0PYe3g7MlPKEzd0juR?= =?us-ascii?Q?Ocs5echYDo5ajSZdfw7ddgB6+FTXuZOJcs1Wdf0uv5VP5Z4cREmZ3QPhdEUa?= =?us-ascii?Q?QlbpHtn7UA5TNk/osQMR59Xp5AHcWjWmFX5ZTlEIbay/+wyRp0Z5LaQ+FlTt?= =?us-ascii?Q?NPwbXCKETrMUdKDPfN3wUUTKiRnCP7FICQeHkGbJWmHYBuLqVFoaDqYX6/oQ?= =?us-ascii?Q?LLZf/0xwwgrthzk0+ACWwGg6S3aKkIQDCiW+8GcUNQvCPtIjKTCUcuj9gjDZ?= =?us-ascii?Q?5MCYCOcOoEEwe0ZqW4yHoN8A9wdPnztgWaH4hVqZMcxDcPECx+esO91dbWpT?= =?us-ascii?Q?uRANvmLWBHprtDdYRn5ZLidkKWSqPnM+V1Acsyd1LyesXRR+fcxM7H4FYLUz?= =?us-ascii?Q?xiKTWCCLmhDqQVK5QgdWWM5+lvC7taHCpxliJ3Hq09XJOW2Xr39UybfPPWrS?= =?us-ascii?Q?7MG6Wp/kioUcb9EQe3OS5IGBPwyjXtFjwrgzuP0+BHV4R7W75znO3b0CMlyI?= =?us-ascii?Q?WtuVG0PSlitKn0o4ZpKamxLlmxkzC7zO/y5Zn8rt583KWB+K8GUv39TBZxE7?= =?us-ascii?Q?NnpE4TLZ6HHPGehYh5FHUlYcV8JD0IhZcPc5Zcp7CUBB9/jBepWUrzvJb/9w?= =?us-ascii?Q?DsLq8ad8/GOa8NatcK1MeXdTAa/4lvpHgE/McGSrMIf+ys0SZwOv5NemOSdB?= =?us-ascii?Q?2JipYnQVAM5TFk15rTJAP56G6d//Xt4IoxLr96JUvFSaMp9/B8XskItpZMNp?= =?us-ascii?Q?zB4+Sl+DuxsCK6fRnJBD+buAwcutZGwUEYpaiOu7fvfAqtodBNLoCEVEqJEl?= =?us-ascii?Q?iLCsp0+oUlqkcT8aueoZsMkBw/q6RQV5DcVYI1jZ4sh/iCkf0xNTUXPCxb7X?= =?us-ascii?Q?ayKFJRuX3BBOYFoLulHSxVccE76YAh2zwzt1h28zc25zrVyuSgOuqtF5LiYb?= =?us-ascii?Q?ACC3HxdRkx+Zv9Nmuny7X/bFm2EdVdSvl+LOR+NWSbDPZtPG0rfjeRioch8J?= =?us-ascii?Q?ThUeyEcODaGXjnanIV4hjSh8zUCypIMxXDkVKKs/igv+jsIdl/IOqMedeES8?= =?us-ascii?Q?YHDKOuK1vJlDwE6eKNE3x7v3Jl+qYtIpE9Qz21NZ03iW8UKeFEEOdCheUP9C?= =?us-ascii?Q?8XM6by/dstwDSU55XCwq++TDEvx38PVWt3DOs6xC7duAgHqHLDQ7x4yjPIHo?= =?us-ascii?Q?sIwgQMGgz0RlGFE=3D?= X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(376014)(82310400026)(7416014)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Feb 2025 17:48:58.0862 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e9c00892-17d4-4c30-e578-08dd447b0936 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN1PEPF0000468E.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB7354 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250203_094912_045684_D48EE1E8 X-CRM114-Status: GOOD ( 11.98 ) 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 Hi Eric, On Wed, Jan 29, 2025 at 01:40:54PM +0100, Eric Auger wrote: > On 1/11/25 4:32 AM, Nicolin Chen wrote: > > A "fault_data" was added exclusively for the iommufd_fault_iopf_handler() > > used by IOPF/PRI use cases, along with the attach_handle. Now, the iommufd > > version of sw_msi function will resue the attach_handle and fault_data for > reuse Ack. > > diff --git a/drivers/iommu/iommufd/hw_pagetable.c b/drivers/iommu/iommufd/hw_pagetable.c > > index ce03c3804651..f7c0d7b214b6 100644 > > --- a/drivers/iommu/iommufd/hw_pagetable.c > > +++ b/drivers/iommu/iommufd/hw_pagetable.c > > @@ -402,10 +402,10 @@ int iommufd_hwpt_alloc(struct iommufd_ucmd *ucmd) > > } > > hwpt->fault = fault; > > hwpt->domain->iopf_handler = iommufd_fault_iopf_handler; > > - hwpt->domain->fault_data = hwpt; > > refcount_inc(&fault->obj.users); > > iommufd_put_object(ucmd->ictx, &fault->obj); > > } > > + hwpt->domain->iommufd_hwpt = hwpt; > don't we want to reset this somewhere on release path? We do iommu_domain_free() entirely on HWPT's release path. This basically sets the domain's "owner data" as Jason remarked: https://lore.kernel.org/linux-iommu/20250113164037.GO5556@nvidia.com/ Thanks Nicolin