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Wed, 7 Aug 2024 13:11:22 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , Subject: [PATCH v1 13/16] iommufd/viommu: Add iommufd_viommu_to_parent_domain helper Date: Wed, 7 Aug 2024 13:10:54 -0700 Message-ID: <3d61830fe978e1b5024ce1f36442dcd5ecc03362.1723061378.git.nicolinc@nvidia.com> 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: CH2PEPF0000009F:EE_|DM4PR12MB7742:EE_ X-MS-Office365-Filtering-Correlation-Id: 0597e5f2-0e1f-4cbb-cc48-08dcb71d26be X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700013|7416014|82310400026|376014; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(36860700013)(7416014)(82310400026)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Aug 2024 20:11:41.0178 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 0597e5f2-0e1f-4cbb-cc48-08dcb71d26be X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CH2PEPF0000009F.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB7742 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240807_131148_121146_3DE9B237 X-CRM114-Status: GOOD ( 10.18 ) 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.c | 8 ++++++++ include/linux/iommufd.h | 8 ++++++++ 2 files changed, 16 insertions(+) diff --git a/drivers/iommu/iommufd/viommu.c b/drivers/iommu/iommufd/viommu.c index 2304f199b033..39a7c04c4132 100644 --- a/drivers/iommu/iommufd/viommu.c +++ b/drivers/iommu/iommufd/viommu.c @@ -239,3 +239,11 @@ int iommufd_viommu_invalidate(struct iommufd_ucmd *ucmd) return -EFAULT; return rc; } + +struct iommu_domain * +iommufd_viommu_to_parent_domain(struct iommufd_viommu *viommu) +{ + if (!viommu || !viommu->hwpt) + return NULL; + return viommu->hwpt->common.domain; +} diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index e0d7a53acbd5..c0ce12cb1374 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -91,6 +91,8 @@ int iommufd_vfio_compat_ioas_create(struct iommufd_ctx *ictx); int iommufd_vfio_compat_set_no_iommu(struct iommufd_ctx *ictx); 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) { @@ -137,5 +139,11 @@ 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