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Fri, 28 Feb 2025 20:40:24 -0800 Date: Fri, 28 Feb 2025 20:40:22 -0800 From: Nicolin Chen To: Zhangfei Gao CC: , , , , , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH v8 00/14] iommufd: Add vIOMMU infrastructure (Part-3: vEVENTQ) Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MWH0EPF000971E3:EE_|SA1PR12MB8857:EE_ X-MS-Office365-Filtering-Correlation-Id: 24f2bfa6-deb0-4bbb-4e28-08dd587b34c8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|1800799024|36860700013|376014|7416014|7053199007|13003099007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?kfvezs0K7T8c8uFa9XcxlT0cC5ZRB7YJK8ZrRpXu0a9YynnTGLlB5GPA2JKU?= =?us-ascii?Q?fsbRMr8+hdbjx9JgYrHaPsdo3jh3ZDSktHdRCjvNvIT4bTcHbOci0fLGtUU1?= =?us-ascii?Q?yprzUktoBMU8Sd+tyoMvu7BNPlHctSMS3NdT18x5S7YAcafQCQ1qK5g2E1qC?= =?us-ascii?Q?ZVIBfQxl9XF4369cDhCFhm4vfZnRLY1O6ETgSTWQXsk+bUWl4pKd7Xpl2Bfx?= =?us-ascii?Q?77UDIoYImdGclygpd8sWOsiEmNWaat7eq0vzWtR6WezML9Y6fXR5EXiSf4aY?= =?us-ascii?Q?2XXbJdyCgcJ6DOdYVe8N9zFOtqujahg75a6CnpeTPcxcRfO5fWXtBZrW8EFU?= =?us-ascii?Q?eUJvwc4Q2WhJ86FKX3DuTRYYHovUhmXgr525ZzCusjbnc3lyp87ySiHOpnxY?= =?us-ascii?Q?5jEwqMmC7smtrKHgyX3kZNkkN4pfcpeCbS1q767rEdd5IqgUqewg5oPHlH98?= =?us-ascii?Q?L1NvHn/qa+JwQNRSfMVh1pP4cHxgLEya6cfxId94TERY5n7hCczag/l1smUo?= =?us-ascii?Q?rXQ/a3g0zRPgMzD/zSmTieCbxVbuNC19TdnMn5q1QVHV/f7YoAO8rwM3Lw7H?= =?us-ascii?Q?23PdaYGxf9NJjaJwZfWqK5nzSrtwYxOVvgul7M8lV7wMiHkhXOBBtVcDrzi4?= =?us-ascii?Q?wqP7Rmk2UOEr6BZsF6yDYZwVL3ZaKDkHuDWLsY++9NHKGNMUDTcNs6GL63O6?= =?us-ascii?Q?a0dTd3zYgAifgutOKFoOCNGE4u8cS5O8yPZupybITowL2Gs9AvTDJqwRO2OG?= =?us-ascii?Q?z9CO/ZAo/e+nXqgeF0jPEPuo+DBsmsslIdnBElaLYCuVpeRBMqz5Hc5kBq1n?= =?us-ascii?Q?rEBWDJCVIrK6j2emJsxn/HnFZVcS3vdJIPKww41ZWU1ISphEPE4LtlMfzKNQ?= =?us-ascii?Q?3u1pGawWbUn5SCzZIvDoEm+obBxrVfKCRaoQlArrNVoyxFfQAJGZN2bhHrh7?= =?us-ascii?Q?5yhjKWq6C0U6QZhXq12aPQjnK16F4eBKq2J3/HGpVf8CFuA94DmcJSwTm6/w?= =?us-ascii?Q?Eq29UCvdrX7TTFOM1uys4jMZi84W11JYUcXjCLoZ9I98yVTHr9iLNTnT1wHJ?= =?us-ascii?Q?jeVeTEsznWWs0bx5W1OBrSvC/fQfCiMJuj7Q4wdTogdA1f3avOINzhV+wpWs?= =?us-ascii?Q?3+bdlNWXduX84TexJO/qBcz5eYPyYo0t6po1sygxes74n1XxMdXNYqeQ4ZkX?= =?us-ascii?Q?SUAiBV96ZgTyk8gQHbILa7twh7Ndw+tiJNWPADnELyX2FkU/6so5vFfjZIxO?= =?us-ascii?Q?/neyo1x44FG0TnhlWsjrGbSoAwurWAxcQSP36PYTDLlksZ4mDOn+9JK0TVVi?= =?us-ascii?Q?V1nAWEpAu6SnoAsFjFQZ9FRf68hJRAzH8zdj9GYhCg+bl62Zj3bN7VxpKkKb?= =?us-ascii?Q?f0Ej1RCJlahmKlsXT9G8nFxjmrEvpTxWo8gqCPu8gIYOTmastNxzzpqjizhf?= =?us-ascii?Q?5JpMBy7x21tKh6rDlD24jFlRveQ6bbe8cTvJ0QyrfNwv92uIV0kU2KZU6WMP?= =?us-ascii?Q?F94qb66dAq5zPXE=3D?= X-Forefront-Antispam-Report: CIP:216.228.118.232;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge1.nvidia.com;CAT:NONE;SFS:(13230040)(82310400026)(1800799024)(36860700013)(376014)(7416014)(7053199007)(13003099007);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Mar 2025 04:40:34.5305 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 24f2bfa6-deb0-4bbb-4e28-08dd587b34c8 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: MWH0EPF000971E3.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR12MB8857 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250228_204042_843096_3E041B02 X-CRM114-Status: GOOD ( 19.22 ) 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 Sat, Mar 01, 2025 at 12:16:00PM +0800, Zhangfei Gao wrote: > On Wed, 26 Feb 2025 at 01:33, Nicolin Chen wrote: > > > > As the vIOMMU infrastructure series part-3, this introduces a new vEVENTQ > > object. The existing FAULT object provides a nice notification pathway to > > the user space with a queue already, so let vEVENTQ reuse that. > > > > Mimicing the HWPT structure, add a common EVENTQ structure to support its > > derivatives: IOMMUFD_OBJ_FAULT (existing) and IOMMUFD_OBJ_VEVENTQ (new). > > > > An IOMMUFD_CMD_VEVENTQ_ALLOC is introduced to allocate vEVENTQ object for > > vIOMMUs. One vIOMMU can have multiple vEVENTQs in different types but can > > not support multiple vEVENTQs in the same type. > > > > The forwarding part is fairly simple but might need to replace a physical > > device ID with a virtual device ID in a driver-level event data structure. > > So, this also adds some helpers for drivers to use. > > > > As usual, this series comes with the selftest coverage for this new ioctl > > and with a real world use case in the ARM SMMUv3 driver. > > > > This is on Github: > > https://github.com/nicolinc/iommufd/commits/iommufd_veventq-v8 > > Paring QEMU branch for testing: > > https://github.com/nicolinc/qemu/commits/wip/for_iommufd_veventq-v8 > > Thanks Nico > > Tested-by: Zhangfei Gao > > After rebase on your branch > https://github.com/Linaro/linux-kernel-warpdrive/tree/iommufd_veventq-v8 > https://github.com/Linaro/qemu/tree/for_iommufd_veventq-v8 > > Tested with multi-device in guests, with io page faults happen. Thanks for testing! Nicolin