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Fri, 12 Apr 2024 20:47:45 -0700 From: Nicolin Chen To: , , , , CC: , , , , , , , , , , , Subject: [PATCH RFCv1 07/14] iommufd: Add viommu set/unset_dev_id ops Date: Fri, 12 Apr 2024 20:47:04 -0700 Message-ID: <6e57d7b5aa1705bdd547b1cd2aca93d3bf70dfa4.1712978212.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: DS3PEPF000099E2:EE_|SJ2PR12MB8925:EE_ X-MS-Office365-Filtering-Correlation-Id: e4e530c6-808b-435d-4364-08dc5b6c7d5d 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:(13230031)(376005)(82310400014)(7416005)(36860700004)(1800799015);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Apr 2024 03:47:49.6377 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e4e530c6-808b-435d-4364-08dc5b6c7d5d 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: DS3PEPF000099E2.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB8925 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240412_204755_819273_230E7CE6 X-CRM114-Status: GOOD ( 11.97 ) 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 Add a pair of ops to set and unet device's virtual ID that belongs to a viommu object. They will be used, in the following patch, by iommufd to support some HW-acceleration feature from the host level. For instance, every device behind an ARM SMMU has a Stream ID. The ID is used by ATC invalidation commands so SMMU HW can direct invalidation requests to the corresponding PCI device where the ID belongs to. In a virtualization use case, a passthroughed device in the VM will have a virtuail Stream ID, used by the ATC invalidation commands in the guest system. NVIDIA's CMDQV extension for SMMUv3 provides a v-interface to execute the guest-level ATC invalidation commands directly, yet needs the HW to be aware of its virtual Stream ID so it can replace with its physical Stream ID. Signed-off-by: Nicolin Chen Reviewed-by: Jason Gunthorpe --- include/linux/iommufd.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index dec10c6bb261..ca6ac8a1ffd0 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -94,9 +94,13 @@ struct iommufd_viommu { * struct iommufd_viommu_ops - viommu specific operations * @free: Free all driver-specific parts of an iommufd_viommu. The memory * of the entire viommu will be free-ed by iommufd core + * @set/unset_dev_id: set/unset a user space virtual id for a device */ struct iommufd_viommu_ops { void (*free)(struct iommufd_viommu *viommu); + int (*set_dev_id)(struct iommufd_viommu *viommu, + struct device *dev, u64 dev_id); + void (*unset_dev_id)(struct iommufd_viommu *viommu, struct device *dev); }; #if IS_ENABLED(CONFIG_IOMMUFD)