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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: osLOfVODl1ubX94GzuJkmgwVaG/39o/acf1xjfFqQ5+d5SDblt4W3T1MnebsF3uO2nq6f1UuCChs2XzkCFPG/XhlsOYhHvWTPYQ7ZgGkz4EVzkVl9+xXxlc1EgY+tp26xAZ4phy3wjtiiiNXSVLfLn0GYagAfDrIvVQoHtttEpxt1phjTKeq77GqXTId6QN9beLkLPz50wDa+fxf1L6IW983QRXB8h2Fit1bOvgHDtV8wO5zWrxFAmhn8yP1EDwLTw2ARErgeYnzRN7aE3HZsRJr4miL1nlbdDy7RCVmpB7UXBr10as66iDwYGAY830ucEbBD9E8LPQAf9mje9OuJSGGD3O+COVTuHrfpZN0l0anJ1Mn+2/pCqZSkUSi8YtSD0ZeW/EDgt/dll7YYke2WVvRmZzhLRadHwO4bn9MIKihvRmI80wsQH1Ht6d7Lbht X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Nov 2026 19:35:34.8679 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d9c3544a-408d-4a3e-95c8-08df41bd499f 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: CO1PEPF00018867.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA4PR12MB9787 On Thu, Nov 12, 2026 at 01:32:36PM +0000, Mostafa Saleh wrote: > On Tue, Nov 10, 2026 at 10:24:58AM -0800, Nicolin Chen wrote: > > You might want to double check a dual-SMMU case, where one gets > > accepted by pkvm driver and the other fails and so bound to the > > main driver. > > > > It seems the pkvm driver would still pkvm_iommu_register_driver > > and carry on with an untrusted SMMU. Would it also clear the FW > > and mark the system as not trusted? > > > > That shouldn't be possible, if one SMMU fail the whole thing will > and the driver should clean up after as the probe is done through: > ret = platform_driver_probe(&smmuv3_nesting_driver, smmuv3_nesting_probe); If I read __platform_driver_probe correctly: * __driver_attach() doesn't propagate ret from driver_probe_device() via bus_for_each_dev to the caller * bus_for_each_dev(..., is_bound_to_driver) at the end also returns true, as one SMMU is bound to the driver while the other failed. ? Nicolin