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Tue, 18 Feb 2025 10:15:46 -0800 Date: Tue, 18 Feb 2025 10:15:45 -0800 From: Nicolin Chen To: Jason Gunthorpe CC: , , , , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH v6 05/14] iommufd: Add IOMMUFD_OBJ_VEVENTQ and IOMMUFD_CMD_VEVENTQ_ALLOC Message-ID: References: <2fb8d9c7b01ad36b42849283cd33d931f11092cb.1737754129.git.nicolinc@nvidia.com> <20250218152959.GB4099685@nvidia.com> <20250218180805.GI4099685@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20250218180805.GI4099685@nvidia.com> X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS2PEPF00003439:EE_|CY8PR12MB8267:EE_ X-MS-Office365-Filtering-Correlation-Id: 1de284d1-3547-4957-fcd0-08dd50484d08 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|82310400026|376014|1800799024|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?D9kv7cerdKC8lGz2MkuAKUnIl6l5E5zOvMkzN0xvbvMyiqSKI6k2ddOiXlpQ?= =?us-ascii?Q?XvWniNCJFR7q2F6qxfmwhnvpp+mqZQIFja5AoUr6WdwysImk229lSLrr2lWc?= =?us-ascii?Q?blCtu9vCQx7S0JfLrbtwDfHJw9oA0/LiejfA1HJcxp1GUyD5QmmCJYugxsEx?= =?us-ascii?Q?2S1hDXyVOp05kChzO6OGW8w9d5Y3Fxo7SNczXaYKftkn384rZFtS6yKqJzV9?= =?us-ascii?Q?DpX2Ln+ciR/sYVLDp5Iyv27wwA2o7lIIclyrHfm6lus4fzeKWU1rIfBsHsYW?= =?us-ascii?Q?EzJM/vivEyCQDaF2H7LX0g50Ej8tkqQC1sss60N2q9crceF/CbD9Avxwd6yw?= =?us-ascii?Q?O4HTt1oBMbk6TT9E9z96X40ZOv+5ltdDmX+wwzx5WTbTR5OCcai06QtTJGpb?= =?us-ascii?Q?ME4IciM+/CS6PAnuSU5VRZP9zyt+HeDBFbsaRl4qMhpX+YGAxmeWKdXrR9Wk?= =?us-ascii?Q?Mr745HU/MH/6KjLG4O0hc6kzGNyes16po0WlPhLC8BtjRg+d4MamzfMzz7io?= =?us-ascii?Q?lrbZJMY1Imv3p0hLP/5rVuQIa7y43Azote4W1PREk7HtZtNl66Ik/X1vx0bE?= =?us-ascii?Q?nTCRBXGe1PyUYiI5bIognmxnaM6Y4eOt9CzroM7+Pi+nCVwn8AlwjnP2jPyB?= =?us-ascii?Q?3patrI4Xas7/cnwi8KzfxDcDcJmMhjPWWaqhHLA9hAkAEycCYWSVkdziG2pE?= =?us-ascii?Q?MJ/yqR7X8hB0oaqsM68tEs25ivsxJeT64hwUuccxbMgaNSIz8X9i/EXgFy99?= =?us-ascii?Q?tUaQbUf96frgoz0WqOuybdO7JLLvygTaH4OywvREgrmxS5CK3yTKMdtjijMI?= =?us-ascii?Q?M+RwzCnKfPy0jF5j/l/Ucs2G5ZtXy286F9q2SDb6erlwjDjpyK4UOmsihYbQ?= =?us-ascii?Q?ve2KPqJ0p0NsXpNGXaAVA/WQ8YGCDbFJLtjbTXRVm8UAiWer8XMznvxP07z8?= =?us-ascii?Q?5QtlJreWk9gTyJkueTqN+l3cwCu0KyIwBuTdEzn3aTDUvhVMoLTYxxiuzjnV?= =?us-ascii?Q?rDaSCAsk/EGYuN8mv5HT7PD2xMaSmxljgfaNSakX9wgDLfIrtLMyJRolK6Ch?= =?us-ascii?Q?JtnGLPpsmhBTBjBjXmRNd1ghF1PaWLoabZj56pHHE+UMYnL013qp/bMSV22W?= =?us-ascii?Q?bfsgyC9VvBawrwV1JCUTGpRT3V3kFET4rgzTySigo0SGHa5np59sJt6sCY8X?= =?us-ascii?Q?UEXFn5xJS+5XRhzr8fz/RPXyfx1m3+g39AVlotxypHAnu0jAp+VM5JK+cbl0?= =?us-ascii?Q?1MeOsKFaZm5QUUp+ko276lsCz1im4ZASIajvIaRGIVwWSOp0mc/IdKFxdyHr?= =?us-ascii?Q?blJ8WFf0jWT8XAs9/9di5d2WtP4sWSgjD5nEbx7wfU/gD15qgkH7S3zPZuQ+?= =?us-ascii?Q?OuO095CMvVJSIRxLVA0KGcBAmum7MyzRXakwXVnlj+s32DsAs9M06R+gbF93?= =?us-ascii?Q?YU1SvOKF2njLJCgyHGt3MccrPdHzvmsqcIWHKsemsjAnv+n6EMBygZITUmyc?= =?us-ascii?Q?OQNyBU1e6hsx/e0=3D?= 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)(7416014)(82310400026)(376014)(1800799024)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Feb 2025 18:16:01.5217 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1de284d1-3547-4957-fcd0-08dd50484d08 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: DS2PEPF00003439.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR12MB8267 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250218_101606_536038_8A5C0150 X-CRM114-Status: GOOD ( 11.94 ) 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 Tue, Feb 18, 2025 at 02:08:05PM -0400, Jason Gunthorpe wrote: > On Tue, Feb 18, 2025 at 09:47:50AM -0800, Nicolin Chen wrote: > > > > +int iommufd_veventq_alloc(struct iommufd_ucmd *ucmd) > > > > +{ > > > > + struct iommu_veventq_alloc *cmd = ucmd->cmd; > > > > + struct iommufd_veventq *veventq; > > > > + struct iommufd_viommu *viommu; > > > > + int fdno; > > > > + int rc; > > > > + > > > > + if (cmd->flags || cmd->type == IOMMU_VEVENTQ_TYPE_DEFAULT) > > > > + return -EOPNOTSUPP; > > > > + if (!cmd->veventq_depth) > > > > + return -EINVAL; > > > > > > Check __reserved for 0 too > > > > Kevin is suggesting a 32-bit flag field, so I think we can drop > > the __reserved in that case. > > Those are different structs? Oops. Right. I will check the __reserved. Thanks Nicolin