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Tue, 27 Aug 2024 10:01:48 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , , Subject: [PATCH v2 15/19] iommufd/viommu: Add iommufd_viommu_to_parent_domain helper Date: Tue, 27 Aug 2024 09:59:52 -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: CY4PEPF0000E9D4:EE_|SJ2PR12MB8784:EE_ X-MS-Office365-Filtering-Correlation-Id: 23d6dd6a-279b-4d06-f52e-08dcc6b9f825 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|7416014|36860700013|82310400026; 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)(1800799024)(376014)(7416014)(36860700013)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Aug 2024 17:02:01.2535 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 23d6dd6a-279b-4d06-f52e-08dcc6b9f825 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: CY4PEPF0000E9D4.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB8784 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240827_100211_157994_E9BADB62 X-CRM114-Status: GOOD ( 11.72 ) 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 an IOMMU driver to convert a core-managed viommu to a nested parent domain for the info that the domain holds. Signed-off-by: Nicolin Chen --- drivers/iommu/iommufd/viommu_api.c | 14 ++++++++++++++ include/linux/iommufd.h | 8 ++++++++ 2 files changed, 22 insertions(+) diff --git a/drivers/iommu/iommufd/viommu_api.c b/drivers/iommu/iommufd/viommu_api.c index e0ee592ce834..3772a5892a6c 100644 --- a/drivers/iommu/iommufd/viommu_api.c +++ b/drivers/iommu/iommufd/viommu_api.c @@ -37,3 +37,17 @@ struct device *iommufd_viommu_find_device(struct iommufd_viommu *viommu, u64 id) return vdev_id->idev->dev; } EXPORT_SYMBOL_NS_GPL(iommufd_viommu_find_device, IOMMUFD); + +/* + * Convert a viommu to its encapsulated nest parent domain. Caller must be aware + * of the lifecycle of the viommu pointer. Only call this function in a callback + * function where viommu is passed in by the iommu/iommufd core. + */ +struct iommu_domain * +iommufd_viommu_to_parent_domain(struct iommufd_viommu *viommu) +{ + if (!viommu || !viommu->hwpt) + return NULL; + return viommu->hwpt->common.domain; +} +EXPORT_SYMBOL_NS_GPL(iommufd_viommu_to_parent_domain, IOMMUFD); diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index 364f151d281d..f7c265c6de7c 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -92,6 +92,8 @@ int iommufd_vfio_compat_set_no_iommu(struct iommufd_ctx *ictx); void iommufd_viommu_lock_vdev_id(struct iommufd_viommu *viommu); void iommufd_viommu_unlock_vdev_id(struct iommufd_viommu *viommu); struct device *iommufd_viommu_find_device(struct iommufd_viommu *viommu, u64 id); +struct iommu_domain * +iommufd_viommu_to_parent_domain(struct iommufd_viommu *viommu); #else /* !CONFIG_IOMMUFD */ static inline struct iommufd_ctx *iommufd_ctx_from_file(struct file *file) { @@ -145,5 +147,11 @@ struct device *iommufd_viommu_find_device(struct iommufd_viommu *viommu, u64 id) { return NULL; } + +static inline struct iommu_domain * +iommufd_viommu_to_parent_domain(struct iommufd_viommu *viommu) +{ + return NULL; +} #endif /* CONFIG_IOMMUFD */ #endif