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Age	Commit message (Collapse)	Author
2026-01-18	iommu/amd: Add support for nested domain attach/detach	Suravee Suthikulpanit
	Introduce set_dte_nested() to program guest translation settings in the host DTE when attaches the nested domain to a device. Reviewed-by: Nicolin Chen <nicolinc@nvidia.com> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2026-01-18	iommu/amd: Introduce gDomID-to-hDomID Mapping and handle parent domain ↵	Suravee Suthikulpanit
	invalidation Each nested domain is assigned guest domain ID (gDomID), which guest OS programs into guest Device Table Entry (gDTE). For each gDomID, the driver assigns a corresponding host domain ID (hDomID), which will be programmed into the host Device Table Entry (hDTE). The hDomID is allocated during amd_iommu_alloc_domain_nested(), and free during nested_domain_free(). The gDomID-to-hDomID mapping info (struct guest_domain_mapping_info) is stored in a per-viommu xarray (struct amd_iommu_viommu.gdomid_array), which is indexed by gDomID. Note also that parent domain can be shared among struct iommufd_viommu. Therefore, when hypervisor invalidates the nest parent domain, the AMD IOMMU command INVALIDATE_IOMMU_PAGES must be issued for each hDomID in the gdomid_array. This is handled by the iommu_flush_pages_v1_hdom_ids(), where it iterates through struct protection_domain.viommu_list. Suggested-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2026-01-18	iommu/amd: Add support for nested domain allocation	Suravee Suthikulpanit
	The nested domain is allocated with IOMMU_DOMAIN_NESTED type to store stage-1 translation (i.e. GVA->GPA). This includes the GCR3 root pointer table along with guest page tables. The struct iommu_hwpt_amd_guest contains this information, and is passed from user-space as a parameter of the struct iommu_ops.domain_alloc_nested(). Reviewed-by: Nicolin Chen <nicolinc@nvidia.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>