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Fri, 20 Jun 2025 21:51:39 -0700 Date: Fri, 20 Jun 2025 21:51:37 -0700 From: Nicolin Chen To: Jason Gunthorpe CC: Pranjal Shrivastava , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH v6 08/25] iommufd/viommu: Add driver-defined vDEVICE support Message-ID: References: <937d515032be07af36c06a4adb662ee2f7693c75.1749884998.git.nicolinc@nvidia.com> <20250619114425.GB1643312@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20250619114425.GB1643312@nvidia.com> X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF000026C3:EE_|CH1PPF2EB7CF87B:EE_ X-MS-Office365-Filtering-Correlation-Id: 47a24bf0-b0bc-4e0c-fe85-08ddb07f5463 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|36860700013|1800799024|376014|7416014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?gorHbAfQc/BorjlhfqE0doyh+hIS22CU7Z24lvN3xv9Ph7arNi7d9KLuXaQ7?= =?us-ascii?Q?3m+Fi/qp8Wwpd/INRvnKNq7xzWydOAASaP0sBv5w54xLqIk6lSGDB/ShitCn?= =?us-ascii?Q?jaRA3LBhAq5XtVHqSKDwEaK2UWCVbBDfKpKKaM1DVG0OvtLUvS2/lwGKdtaG?= =?us-ascii?Q?SmvYGhw675f37o+6GDcU1bn/WuO0rqGdvUBccpDDMXh7zG9uTHzpNQtSFczd?= =?us-ascii?Q?L5vYXHkI4lv8XZU6TXwhgBXBTxq9qNzDExbBnwIPz6afjHl2NLandR9sWmLi?= =?us-ascii?Q?J9Z+GUAhjJuJNwDImUmLlABpPxJGjqxEEiMX/bnqlUbvuMUww9U1LogH9jq7?= =?us-ascii?Q?iIQL/leFUT4ASbFxjtPsqLChq7SRmLVoIwpFGs6DChPxtyhyhNpGOvk8OEPc?= =?us-ascii?Q?363p8ti9HlIB5E9753zw+lj1kmevqIL4ERgc/7X04P7wjNdrOl6yjjnmlV7t?= =?us-ascii?Q?f0qSg5AEreZ7pYc9PxIlWHQAFwErwFSIwLUSymtHL92/23yIQNFu5WNx9j7s?= =?us-ascii?Q?3qlSXV2zbgNtimFao4Qx4NiSP/UbjJwomA7zLL/yCNI9xfnY0I2L30H3/3yl?= =?us-ascii?Q?IafbQo469Jgw0Sxx3q5COw01pKMAQG1lGqeuc7uk2DEw8kQa6ZYB964snEUu?= =?us-ascii?Q?LNldJaCEjA09gsTz1czmDT6KRMIgWmmj4ilMjHoaze+GiLQOdBepk9SpOWpC?= =?us-ascii?Q?qaxV6TGHH8HE4ZjEgA1/cFVgYRgm0QulqbBwkq8nyf+SWr5t2y27WYzTPN00?= =?us-ascii?Q?qOpp2mQBGBf4QtigrISkCZCKFIoMoqsnY29kJJth1pIo4bY5fOpWpZzxHSS2?= =?us-ascii?Q?I0FVBH+ySRVjHzg4wI1B7wsdiMnA/Fkgsf0MgajvMzUC6svTBre8JsU2rAyZ?= =?us-ascii?Q?iSnbu/crovFaRSsPd3z8pvOcwYKZsDBLl9OuPyaIYuHclbEceZmmiFqf3vDw?= =?us-ascii?Q?Y1ze2IkM/CBGItUwmYQAKCWMMgnZ1512A4biUxORWRAJ23Mnz3BQK6DW8EVg?= =?us-ascii?Q?Zb45tW2M4cG/r1cmIrVokkdpmHx0Y2twtUONyUAHhNjk01rM2T65icCESf1d?= =?us-ascii?Q?GkcAIfuQscEHTT4zcV7D8YhaQ409ojyfQCqi4oJ20wg78Gx/OPBeFvrxU4ZH?= =?us-ascii?Q?7gEyyRFKvJ2try5DLFeKcSyNh3S00Cr4G5vuG+YQBvwidHsf69OWqSFnOOW6?= =?us-ascii?Q?BEd/XhDewwl5EalljXs+zENdpvAHz5ecLc7/+ysn4lWGSHhLvYgpU6gvGRdF?= =?us-ascii?Q?Jo9SSydWEzWQc/4skbFHNMk+DenDtrjULmwbTv9DYdKYcjcNCKAYpx9XLJ/l?= =?us-ascii?Q?BnN6oSVQDSFSG08IzeeTO3iKLCeHUq0RKqs1P1DzresJ/VcfmJ1XMwPf1zu3?= =?us-ascii?Q?HgAlfq/CSNpxppAxtB8WJf9ESf9olBIIOV7/+ENbIIHTDT45Q3IhbDjdONcx?= =?us-ascii?Q?1Y6GTzvEDont4Zi10DdJ+oF2VhEazgTTB9hHkXJas01EC5oj5NiLXPomepKd?= =?us-ascii?Q?BJiV3ASyfUq/0XmaAqElpySJY5zC01bZjc5S?= X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(82310400026)(36860700013)(1800799024)(376014)(7416014);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jun 2025 04:51:47.8931 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 47a24bf0-b0bc-4e0c-fe85-08ddb07f5463 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF000026C3.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH1PPF2EB7CF87B X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250620_215156_835620_011A0715 X-CRM114-Status: GOOD ( 10.51 ) 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 On Thu, Jun 19, 2025 at 08:44:25AM -0300, Jason Gunthorpe wrote: > On Thu, Jun 19, 2025 at 10:26:28AM +0000, Pranjal Shrivastava wrote: > > > +struct iommufd_vdevice { > > > + struct iommufd_object obj; > > > + struct iommufd_viommu *viommu; > > > + struct device *dev; > > > + u64 id; /* per-vIOMMU virtual ID */ > > > > Nit: Why not call this viommu_id? > > And lets have a comment here too, we have so many different ids, what > id is this id and what it is used for, by who. Sure. Will change to "virt_id" and add some description here. Thanks Nicolin