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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Apr 2025 19:00:45.9083 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e584fedd-2e6a-4dc7-0024-08dd8686fb95 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: BN3PEPF0000B06D.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB7280 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250428_200052_048881_4FDE1E93 X-CRM114-Status: GOOD ( 11.51 ) 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 Mon, Apr 28, 2025 at 09:31:31PM +0700, Bagas Sanjaya wrote: > On Fri, Apr 25, 2025 at 10:58:10PM -0700, Nicolin Chen wrote: > > +- IOMMUFD_OBJ_VCMDQ, representing a hardware queue as a subset of a vIOMMU's > > + virtualization feature for a VM to directly execute guest-issued commands to > > + invalidate HW cache entries holding the mappings or translations of a guest- > > + owned stage-1 page table. Along with this queue object, iommufd provides the > > + user space an mmap interface for VMM to mmap a physical MMIO region from the > > + host physical address space to a guest physical address space, to exclusively > > + control the allocated vCMDQ HW. Thus, when allocating a vCMDQ, the VMM must > > + request a pair of VMA info (vm_pgoff/size) for a later mmap call. The length > > + argument of an mmap call could be smaller than the given size for a paritial > > + mmap, but the given vm_pgoff (as the addr argument of the mmap call) should > "... partial mmap, ..." Fixed. Thanks! Nicolin