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Wed, 5 Apr 2023 23:26:19 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , Subject: [PATCH RFC v1 0/3] Add set_rid_user and unset_rid_user support Date: Wed, 5 Apr 2023 23:25:33 -0700 Message-ID: X-Mailer: git-send-email 2.40.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT012:EE_|DM4PR12MB8558:EE_ X-MS-Office365-Filtering-Correlation-Id: f7f6d250-2a02-4687-a7ab-08db3667dbd2 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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:(13230028)(4636009)(346002)(396003)(376002)(39860400002)(136003)(451199021)(36840700001)(46966006)(40470700004)(2906002)(36756003)(82310400005)(86362001)(40480700001)(7696005)(47076005)(966005)(2616005)(83380400001)(186003)(426003)(26005)(336012)(6666004)(36860700001)(70206006)(8676002)(7416002)(40460700003)(41300700001)(82740400003)(356005)(70586007)(5660300002)(54906003)(478600001)(110136005)(7636003)(316002)(8936002)(4326008);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Apr 2023 06:26:29.9823 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f7f6d250-2a02-4687-a7ab-08db3667dbd2 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: CO1NAM11FT012.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB8558 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a pair of new uAPI/ops for user space to set a user space virtual Request ID for a passthrough PCI device, down to the IOMMU driver. This's primarily used by SMMUv3 driver for now, to link the vSID and the pSID of a device behind the SMMU. The link (lookup table) will be used to verify an ATC_INV command from the user space for that device, and then replace the virtual SID with the corresponding physical SID. This is a RFC series, since I am not confident at all about the uAPI/ops namings. Hopefully we can finalize this small series soon and include it in the next version of SMMUv3 nesting series. This series is available on Github: https://github.com/nicolinc/iommufd/commits/set_rid_user-rfc-v1 Thanks! Nicolin Nicolin Chen (3): iommu: Add set/unset_rid_user ops iommufd: Add IOMMUFD_CMD_DEVICE_SET_RID and IOMMUFD_CMD_DEVICE_UNSET_RID iommu/arm-smmu-v3: Implement set_rid_user and unset_rid_user drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 45 +++++++++++++++++++++ drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 2 + drivers/iommu/iommufd/device.c | 39 ++++++++++++++++++ drivers/iommu/iommufd/iommufd_private.h | 2 + drivers/iommu/iommufd/main.c | 4 ++ include/linux/iommu.h | 4 ++ include/uapi/linux/iommufd.h | 31 ++++++++++++++ 7 files changed, 127 insertions(+) -- 2.40.0