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Sun, 12 Oct 2025 17:06:16 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v1 19/20] iommu/virtio-iommu: Implement viommu_domain_test_dev Date: Sun, 12 Oct 2025 17:05:16 -0700 Message-ID: <562f5a6c9f55066dd50f95210e5669e256852d36.1760312725.git.nicolinc@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: 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-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF00021F69:EE_|CY3PR12MB9703:EE_ X-MS-Office365-Filtering-Correlation-Id: b2ff0e49-a48a-4535-974a-08de09ec5b89 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|7416014|376014|1800799024|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?tIsNpha0J/T8syGzcUg54ECBkPWdm8IaqKY6Av+DtEGBJIQWPXP0+PSlnv2p?= =?us-ascii?Q?2t+UN+dtXd0e+dxefSepkTA4r2/goYJrNOBeMldldk4rgmeOWW25CCTNeODM?= =?us-ascii?Q?5i6iiM/Qi2tOkqV3iZQbAWMucaOG8pxJg+5S4CgsRksEfi7syUfY1mwcVJbX?= =?us-ascii?Q?vEESY/dK0SAW0mtsVwNkrXr0S0Zp6tMF3uOCzTGuQZgMKq1ws9pTuxQDzGuL?= =?us-ascii?Q?+WL1hqkNyRvf2gG7hWAte8zTow4lUkK8Vlh4qp7GWtlp0X8P8uElr25dSeZE?= =?us-ascii?Q?FUMGMkll4rHR8dSGRYGcSXPijwLR1RIx/SX2hLXOr//ze+aiSRN7jhFhQ/Cl?= =?us-ascii?Q?S6yc8Lac+VDkseExJWW0eWpuKBPsPj0u836HXoBjGFmjTpZAgV6ylqGfxNWA?= =?us-ascii?Q?sC4WlKahPvvTFbb+xw3y4Nj34d9GcQX0MJUIQtswiYpshP+LxnrkMWmKEInP?= =?us-ascii?Q?J9lat7h54KKPxS0PQ4YX5TMe9N7QMMDEdngZFvPZPyuSr6H2MbTqQcdTupS7?= =?us-ascii?Q?CS1jPD7q5EJrrjMeBiMkVOXH7Cv+5dI+GhXsclGdVS9eZn7yEZxqHlyVr7qo?= =?us-ascii?Q?xvHjr6/Vts3CeaghlPneput/w0y2bED0Cj/XoSd6wsVt90Kfk1OuS/1djnoT?= =?us-ascii?Q?fdxykVcSh0ILWyPbBTuQO3JcrOj5TntZ5mkASTTqsikfK7IBE/JPVuOC00EV?= =?us-ascii?Q?jLWKTpRd2TyZuCQlyklVTj6MwlS8MwBDHGDz8VJtgM5ujZXyQUBn4EvYBneb?= =?us-ascii?Q?w8o7jm4pCvmYP7fCN4W/9Kox9Fr267MXf54tr/3i2KozLZb+iCoNccMdyrjh?= =?us-ascii?Q?GM3UMW6N9p6w7mqpD8kcq2SoJF2xZqZAmTtUuX9dv7vLUuSCUed33f6W06nQ?= =?us-ascii?Q?i9+rIj+abmVsPKnq9/07QfFsyYCTFUrLFG6kg7M2vuUuwUZs22+3Jo/g+6m3?= =?us-ascii?Q?7m62g62/nYDHYfVuG/xw9xdU5ipZZVSuSMKYflKl6ePXImkGoGKHs7pHcGJY?= =?us-ascii?Q?tPI79nQJW9euP86Vr/OdxoTjLI/CK4AklLEVMuZq0EdoCq/gL7MYGVA3xd/J?= =?us-ascii?Q?zveVnOfyR2l7Xf4gxFGEFgJA9iV6FJz7UtxKJLNeFajyceCx7xs+w8sFDsrS?= =?us-ascii?Q?QNZp5RhXNxGDDgEzrzZG1qIxUdeBjERrZ2S8J32Dj9yCQ4iM1Vt6eYdSL66y?= =?us-ascii?Q?av8UDnYNaWODdK/yDUC/uqF/2AXoM2oXUqDMfOzqzgcqw2JjIfKKvlmrBLtk?= =?us-ascii?Q?deGnH3ZlqvnxwWF5fmLgwl4hMfDB5HA+sZ4gCnOe/b2KeLQ4ppamPo3yS9uP?= =?us-ascii?Q?+A4j5gc9zsykbDfeiUug+JP3HO3jzNMmQxEAUxq/8c2qfG8graFc9V8VYo3j?= =?us-ascii?Q?aosS8nzuFqwVczYT/9ljdrRot5U9LuLrEeZ+bWemEbLRom5d0z8cD0hBomO4?= =?us-ascii?Q?jYUOdhmprlrdTkGC0Hu9bYu7ROiapAzlq/c6hSVAMkg5sUNau7yeQDXuBKD6?= =?us-ascii?Q?yLBBBRuDytnYA02xWMS0WWHGW0xlztLv8rqqyNDQ35ZaNyPOLfuLoDkp9zgf?= =?us-ascii?Q?1FQU5+FBXvTq7hipu7U=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)(82310400026)(7416014)(376014)(1800799024)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Oct 2025 00:06:28.4377 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b2ff0e49-a48a-4535-974a-08de09ec5b89 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: BL02EPF00021F69.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY3PR12MB9703 Content-Type: text/plain; charset="utf-8" Move sanity and compatibility tests from the attach_dev callback to the new test_dev callback function. The IOMMU core makes sure an attach_dev call must be invoked after a successful test_dev call. Signed-off-by: Nicolin Chen --- drivers/iommu/virtio-iommu.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c index d314fa5cd8476..766dded8fc8a6 100644 --- a/drivers/iommu/virtio-iommu.c +++ b/drivers/iommu/virtio-iommu.c @@ -730,6 +730,18 @@ static struct iommu_domain *viommu_domain_alloc_identi= ty(struct device *dev) return domain; } =20 +static int viommu_domain_test_dev(struct iommu_domain *domain, + struct device *dev, ioasid_t pasid, + struct iommu_domain *old) +{ + struct viommu_endpoint *vdev =3D dev_iommu_priv_get(dev); + struct viommu_domain *vdomain =3D to_viommu_domain(domain); + + if (vdomain->viommu !=3D vdev->viommu) + return -EINVAL; + return 0; +} + static int viommu_attach_dev(struct iommu_domain *domain, struct device *d= ev, struct iommu_domain *old) { @@ -738,9 +750,6 @@ static int viommu_attach_dev(struct iommu_domain *domai= n, struct device *dev, struct viommu_endpoint *vdev =3D dev_iommu_priv_get(dev); struct viommu_domain *vdomain =3D to_viommu_domain(domain); =20 - if (vdomain->viommu !=3D vdev->viommu) - return -EINVAL; - /* * In the virtio-iommu device, when attaching the endpoint to a new * domain, it is detached from the old one and, if as a result the @@ -1099,6 +1108,7 @@ static const struct iommu_ops viommu_ops =3D { .of_xlate =3D viommu_of_xlate, .owner =3D THIS_MODULE, .default_domain_ops =3D &(const struct iommu_domain_ops) { + .test_dev =3D viommu_domain_test_dev, .attach_dev =3D viommu_attach_dev, .map_pages =3D viommu_map_pages, .unmap_pages =3D viommu_unmap_pages, --=20 2.43.0