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Fri, 25 Oct 2024 16:50:08 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , , , , , Subject: [PATCH v5 05/13] iommufd: Add alloc_domain_nested op to iommufd_viommu_ops Date: Fri, 25 Oct 2024 16:49:45 -0700 Message-ID: X-Mailer: git-send-email 2.43.0 In-Reply-To: References: MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF000075F0:EE_|CH2PR12MB4215:EE_ X-MS-Office365-Filtering-Correlation-Id: 65acd73d-5f08-4c7b-4e24-08dcf54fc894 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|36860700013|376014|7416014|1800799024; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230040)(82310400026)(36860700013)(376014)(7416014)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Oct 2024 23:50:19.5214 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 65acd73d-5f08-4c7b-4e24-08dcf54fc894 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF000075F0.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR12MB4215 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241025_165025_804005_5F990EAB X-CRM114-Status: GOOD ( 10.27 ) 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 Allow IOMMU driver to use a vIOMMU object that holds a nesting parent hwpt/domain to allocate a nested domain. Suggested-by: Jason Gunthorpe Reviewed-by: Kevin Tian Signed-off-by: Nicolin Chen --- include/linux/iommufd.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index 4435f21bd833..083ceb209704 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -14,6 +14,7 @@ struct device; struct file; struct iommu_group; +struct iommu_user_data; struct iommufd_access; struct iommufd_ctx; struct iommufd_device; @@ -95,9 +96,17 @@ struct iommufd_viommu { * struct iommufd_viommu_ops - vIOMMU specific operations * @free: Free all driver-specific parts of an iommufd_viommu. The memory of the * vIOMMU will be free-ed by iommufd core after calling this free op. + * @alloc_domain_nested: Allocate a IOMMU_DOMAIN_NESTED on a vIOMMU that holds a + * nesting parent domain (IOMMU_DOMAIN_PAGING). @user_data + * must be defined in include/uapi/linux/iommufd.h. + * It must fully initialize the new iommu_domain before + * returning. Upon failure, ERR_PTR must be returned. */ struct iommufd_viommu_ops { void (*free)(struct iommufd_viommu *viommu); + struct iommu_domain *(*alloc_domain_nested)( + struct iommufd_viommu *viommu, + const struct iommu_user_data *user_data); }; #if IS_ENABLED(CONFIG_IOMMUFD)