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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Apr 2025 08:02:09.2794 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9e8c3e13-45df-4f02-1e89-08dd87bd4ea7 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: BL02EPF0001A106.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS5PPF482CFEB7D X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250430_010214_923571_7EDCFA71 X-CRM114-Status: GOOD ( 13.51 ) 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, Apr 30, 2025 at 09:52:09AM +0530, Vasant Hegde wrote: > >>> Will the hardware replace the physical device ID in the event with > >>> the virtual device ID when injecting the event to a guest event/PPR > >>> queue? > >>> If so, yea, I think you can define them separately using the> vCMDQ > >> infrastructures: > >>> - IOMMU_VCMDQ_TYPE_AMD_VIOMMU_CMDBUF > >>> - IOMMU_VCMDQ_TYPE_AMD_VIOMMU_EVENTLOG > >>> - IOMMU_VCMDQ_TYPE_AMD_VIOMMU_PPRLOG > >>> (@Kevin @Jason Hmm, in this case we might want to revert the naming > >>> "vCMDQ" back to "vQEUEUE", once Vasant confirms.) > > > > I think I should rename IOMMUFD_OBJ_VCMDQ back to IOMMUFD_OBJ_VQUEUE > > since the same object fits three types of queue now in the AMD case. > > Makes sense. > > AMD architecture supports 5 buffers. In practice we have not implemented event > log B / PPR Log B in Linux. > Command buffer > Event Log A / B > PPR Log A / B I think those A/B should be dual buffers of the same type? Anyway, I have renamed all the core "vCMDQ" back to "vQUEUE" in my local branch. Will send v3 in the next days. Thanks Nicolin