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CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc7edge1.nvidia.com; CAT:NONE; SFS:(13230040)(82310400026)(36860700013)(376014)(7416014)(1800799024); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Oct 2025 21:10:50.4011 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4e2c70ba-3e72-4654-8dac-08de18c1f842 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: MWH0EPF000A672F.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB6671 Received-SPF: permerror client-ip=2a01:111:f403:c000::1; envelope-from=nicolinc@nvidia.com; helo=BYAPR05CU005.outbound.protection.outlook.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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 Fri, Oct 31, 2025 at 10:49:39AM +0000, Shameer Kolothum wrote: > To support accelerated SMMUv3 instances, introduce a shared system-wide > AddressSpace (shared_as_sysmem) that aliases the global system memory. > This shared AddressSpace will be used in a subsequent patch for all > vfio-pci devices behind all accelerated SMMUv3 instances within a VM. > > Signed-off-by: Shameer Kolothum Reviewed-by: Nicolin Chen > +/* > + * The root region aliases the global system memory, and shared_as_sysmem > + * provides a shared Address Space referencing it. This Address Space is used > + * by all vfio-pci devices behind all accelerated SMMUv3 instances within a VM. > + */ > +MemoryRegion root; > +MemoryRegion sysmem; > +static AddressSpace *shared_as_sysmem; static MemoryRegion root, sysmem; ?