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Ip=[216.228.118.232]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF000066EC.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL3PR12MB9051 Received-SPF: permerror client-ip=2a01:111:f403:c111::5; envelope-from=nicolinc@nvidia.com; helo=DM1PR04CU001.outbound.protection.outlook.com X-Spam_score_int: -14 X-Spam_score: -1.5 X-Spam_bar: - X-Spam_report: (-1.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.444, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FORGED_SPF_HELO=1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_PASS=-0.001, SPF_NONE=0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Sender: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org On Wed, Apr 15, 2026 at 11:55:27AM +0100, Shameer Kolothum wrote: > Command Queue Virtualization (CMDQV) is a hardware extension available > on certain platforms that allows the SMMUv3 command queue to be > virtualized and passed through to a VM, improving performance. > > For example, NVIDIA Tegra241 implements CMDQV to support virtualization > of multiple command queues (VCMDQs). > > The term CMDQV is used here generically to refer to any platform that > provides hardware support to virtualize the SMMUv3 command queue. > > CMDQV support is a specialization of the IOMMUFD-backed accelerated > SMMUv3 path. Introduce an ops interface to factor out CMDQV-specific > probe, initialization, and vIOMMU allocation logic from the base > implementation. The ops pointer and associated state are stored in > the accelerated SMMUv3 state. > > This provides an extensible design to support future vendor-specific > CMDQV implementations. > > No functional change. > > Signed-off-by: Shameer Kolothum Reviewed-by: Nicolin Chen