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Mon, 21 Oct 2024 22:12:55 -0700 Date: Mon, 21 Oct 2024 22:12:54 -0700 From: Nicolin Chen To: Yi Liu CC: , , , , , , , , , , , Subject: Re: [PATCH v3 1/9] iommu: Pass old domain to set_dev_pasid op Message-ID: References: <20241018055402.23277-1-yi.l.liu@intel.com> <20241018055402.23277-2-yi.l.liu@intel.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20241018055402.23277-2-yi.l.liu@intel.com> X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF00020E66:EE_|CYXPR12MB9426:EE_ X-MS-Office365-Filtering-Correlation-Id: c263124d-e4dc-489f-3323-08dcf2583899 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|7416014|376014|1800799024|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?MbwIwi+GB3KMSACUa09V/4NpVaHioxDAs0TFFyQr7zT5EDy4QTzhKqwL+FsS?= =?us-ascii?Q?3l8v2MYU+5Yol3Xm/g4ifl/zsv/KBskIJJdz4ffWCdeQvgq7eDs/Xo9VN0Lg?= =?us-ascii?Q?G1GIQ8m9nBiWYQCM/AAa1pJU3zn32LtBXJirOF2VYw3FhuHyJeBHVuMFpixz?= =?us-ascii?Q?/KwwHdcF4y8wQv123pBMaIz25iOV7NKVi9rm+IA8f6MGhlfcnDo4HQ5WywVx?= =?us-ascii?Q?Ao9Aw3Lkm8LoeOEzmswENVR8L2Z2TJbcWxZXfWndAsAqUszZpsggCRfQIu+J?= =?us-ascii?Q?a6+9A+eyEtdLAuT/tsnRR+61cTrY91ZXZh25GUWJdCM0P6aw1DfWsMSWZr39?= =?us-ascii?Q?zD7UF2E2bGCKhoOte3to4o9KrA+h05iAPpRxwW8aQsVUS+DRqskur7mp9XsX?= =?us-ascii?Q?6vEyR9S0z3uzqU6xvv21iAOuKc+8VVMM4UcRRTrska8cmx086xWFZC2jFTg3?= =?us-ascii?Q?bSX687KCcV80mJxm5uHfgEhNXxR/3Eu674eHTr9KgQAZfCzzzsvbHdsUyNTt?= =?us-ascii?Q?hLN4cC/y6NImRucXqXWvS7RnHMvzCrFZB9U7qa/EiTR+7/wG672HL7DPOpDe?= =?us-ascii?Q?T9aBQnAdgMKtEbcQWtMEvEIi14oCi1xc55KhraZfSde3n2cWrXZR/74ry/zt?= =?us-ascii?Q?DtzbTiw3BIaHyhu0/YH6M7B4QFucXsuJ0x64gOQUlb6EdmpZWoQ/HkY+B/fQ?= =?us-ascii?Q?U0MT2EJCJc9DWNbI1nejjo6w9bBo36dh7bR1dukWtNP9x6TJheRnJ70vM5Rk?= =?us-ascii?Q?xntQdezGw0Qach2w4WQrMBMGufsa4WVMw1XL2ldcQ9sJogg7nS3f6C7GRhBJ?= =?us-ascii?Q?fR318WintLLg8Un5FLz8NI4afUAsiZ4aWp14krhaNLjuyaqCrRptj3if4i1M?= =?us-ascii?Q?HymbGqpgkjI3hATHBCMQhi7ZMJYF1Cx5xC5ux+pflHSytkmPOqVMjWp//ChC?= =?us-ascii?Q?8vj081lDvmP8bLG/OOszG06sLbE7RKg7GXtp+yjsTtjNq6P1W13nS8dMPvYV?= =?us-ascii?Q?8B5jZapeOby7rhpzBsgK2QRHmDbDdgdJDFMT7APl27S72Fkl6zaRN7R+KhHA?= =?us-ascii?Q?GGe9MdmGRANfSqe6ZVKo37ggDzhmR8q4bF2+D6WB/Kw1DLQr8geKGR3oMsJO?= =?us-ascii?Q?eD5sGY0E4A89dGFmeVTVwGp4Cut2vsUNILTENBoYc+NNv+ijaIOzeHyxb0w0?= =?us-ascii?Q?cjA5GKBGtPpOFAwQI1L3ptuB0ommzHenGr7mYefX0gCi1xvnv4aBPpuVcfbZ?= =?us-ascii?Q?msCrZJwIbNBj/n+go53okeTmqtlHqqQg1tZ5fOROLVBAr896ijCrYXAmwMcT?= =?us-ascii?Q?ULrUHCI+fuYzXjPI4v02OjxNYz1JusQvzQNk5behrnmqi8D6FXah0DtiKilY?= =?us-ascii?Q?ekxc17qotKgknho3odjmcmkbC0spynAALXfLOOBDhsKOrq93bw=3D=3D?= 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)(36860700013)(7416014)(376014)(1800799024)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Oct 2024 05:13:09.8344 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c263124d-e4dc-489f-3323-08dcf2583899 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: BL6PEPF00020E66.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CYXPR12MB9426 On Thu, Oct 17, 2024 at 10:53:54PM -0700, Yi Liu wrote: > To support domain replacement for pasid, the underlying iommu driver needs > to know the old domain hence be able to clean up the existing attachment. > It would be much convenient for iommu layer to pass down the old domain. > Otherwise, iommu drivers would need to track domain for pasids by themselves, > this would duplicate code among the iommu drivers. Or iommu drivers would > rely group->pasid_array to get domain, which may not always the correct > one. > > Suggested-by: Jason Gunthorpe > Reviewed-by: Jason Gunthorpe > Reviewed-by: Kevin Tian > Signed-off-by: Yi Liu Reviewed-by: Nicolin Chen