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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?fyAFY5aYb2qSCgBl6AQjhhxh9xszE1OqLrE92+zrP6qVnr7v8i7GKQbTiKLN?= =?us-ascii?Q?PgmdsudZiYWuFq0y/SsGnWLcrdE0hh+5gZ+fG2HSiX0JMgb83qOAaBtxM/EL?= =?us-ascii?Q?weORG2nBUcG5dd19CP5oa0j6xtB41g3S9zEVCXHBp1v7xsR0a5lVR4OpRzEA?= =?us-ascii?Q?AXSGoIAiKLCuKlxqwip0o6UKZfjHM9IsZ7/UAtVlT6dRfo/U6MIKg+D1jpNJ?= =?us-ascii?Q?gmK8A8ue6Uay9fJM2NmilfqzIBl3ov1hU0ZKSe/AUMLjc/ssoyRr26UIaa1d?= =?us-ascii?Q?6EXqSBPt2yIH3+n1qc662PGzr91VseydP+umAFI2uQKUMYupMwU9A0bCHrrj?= =?us-ascii?Q?Q8I+PoQbv8+SfyoLqy5yicXOQRghLj5v5RbLaf/b3cvuHGyI8/YTu0S9cUOq?= =?us-ascii?Q?J/FnqSLHrpWXJF1WFlHMwW9libIkBO8/nBiGc/Gv/fkR3laSCjnJY66PP7Pn?= =?us-ascii?Q?1HabldntrBcDAtvPLBePaRBYvyzXHMvJwUuGLTVKul0Q1GASQihi0Vb4LH4u?= =?us-ascii?Q?sowFcjjVWg6GyQV6RpZ13cFj27/F+H/Jpe9dhT7dYi/DX3i46oRvQvzFLkA8?= =?us-ascii?Q?q7qyxN6Y2be04HOYPnh6HWqcPX2Xw+dFQWQGq5v+ksdpYpkcr27WK+6/cVoG?= =?us-ascii?Q?Z9oOE2lY59BTRj+eYJk2CL1Jw/wqBTjBvxnu2ctmlB4bnF8XQqH+UAiMfTAP?= =?us-ascii?Q?FmRRvJyHnHEWGOAcDwhsWbYJtURmOOL3czA+5042Ut/EmOqaXZz1yw4KGZkd?= =?us-ascii?Q?Tr9y7179Vght52XtOmaOcYwzYQKOQQJQUWiUE707NaENlffbMCoZXdcFCBOw?= =?us-ascii?Q?A4c6TdRQ5XVX/9A5YGDFGbcpx1B/KlxR4pTz3iXJjCKKP9ScmWYHVKDr259o?= =?us-ascii?Q?2ao6JMLyvKXMjdmEjjKKJsIbCkV8heevwCRXCld75mf3EqSTgqzzuwWAY1zR?= =?us-ascii?Q?UapXbHgzu3jOAX0K71iXCQmm58ZbnY0i+omN9K0o+XkbySdtNTBnvyb1O5yC?= =?us-ascii?Q?ewsJHHji2uUh0HaL3woqpJW2ZM47BUa78JaRyu3WwCb5KcHVcu95/LP4t4iV?= =?us-ascii?Q?WCd0f7Qer9/TjssdDXYPn7bjzd7lPEoNFtxO6HZLimH+wcz/vUvBNCsmhlAD?= =?us-ascii?Q?Brxh7R/72tO/nTF96pCLeRk3/R56sN+YFhzEA8jNKYFtTSqpOZ7H6mqHV8fA?= =?us-ascii?Q?nOdu42p17JP8mDd03DL4ZkGg20EjoNbHCMTGlLqjAIx6nzfKJrvqSKm/raDs?= =?us-ascii?Q?s3wrdfD4vNrs0eG6aYQ84T3A99QKq0Zo9BEc25ewl2OzanSHqAwiB2+htOup?= =?us-ascii?Q?WugocC1e9WomjlLY/EEjaBsqOE1aQV2xGMOLjT0B0K5ZNOXUbvgeq3KCPPui?= =?us-ascii?Q?bBTI/w9rls/suR1+zAr4tHF6wDFv0A9cy9DCTuvN6Enm5ICQrQPXR4UPl6bk?= =?us-ascii?Q?AtXaf1Fy7DISRjC0y44mruyAeup72WWwJZqFgarZiUutLSfe55lLMgyE5OKj?= =?us-ascii?Q?BMnDVYRWUa1FXXqfDKqdkLDTrz0jX2EHmFQNFA7M2EcwglOLR6BMSrMPfGx4?= =?us-ascii?Q?DrX9kmGfsYn9Uvm/HLh5gS9azSoNhFDeUpW2RkOg?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: e27095d3-3304-4a48-d327-08dd51ca6668 X-MS-Exchange-CrossTenant-AuthSource: CH3PR12MB8659.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Feb 2025 16:19:50.1767 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: ++LZacEZHMXNiHzgFGMX6NAk22APsVciYe+ELlfN1Quh8kRJ+tMW7yPDze5MZnFu X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB8134 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250220_081956_561821_F4DA43E6 X-CRM114-Status: GOOD ( 19.47 ) 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 Wed, Feb 19, 2025 at 09:17:18PM -0800, Nicolin Chen wrote: > On Tue, Feb 18, 2025 at 11:31:54AM -0400, Jason Gunthorpe wrote: > > On Fri, Jan 24, 2025 at 04:30:35PM -0800, Nicolin Chen wrote: > > > This is a reverse search v.s. iommufd_viommu_find_dev, as drivers may want > > > to convert a struct device pointer (physical) to its virtual device ID for > > > an event injection to the user space VM. > > > > > > Again, this avoids exposing more core structures to the drivers, than the > > > iommufd_viommu alone. > > > > > > Reviewed-by: Lu Baolu > > > Reviewed-by: Kevin Tian > > > Signed-off-by: Nicolin Chen > > > --- > > > include/linux/iommufd.h | 9 +++++++++ > > > drivers/iommu/iommufd/driver.c | 24 ++++++++++++++++++++++++ > > > 2 files changed, 33 insertions(+) > > > > Reviewed-by: Jason Gunthorpe > > > > > + xa_lock(&viommu->vdevs); > > > + xa_for_each(&viommu->vdevs, index, vdev) { > > > + if (vdev->dev == dev) { > > > + *vdev_id = (unsigned long)vdev->id; > > > > I don't think we need this cast > > The left side is ulong for xarray index, while the right side is > __aligned_u64 for uAPI. Could there be a gcc warning when somebody > builds the kernel having a BITS_PER_LONG=32? No. The kernel is full of these implicit casts Jason