On Tue, Aug 27, 2024 at 12:51:37PM -0300, Jason Gunthorpe wrote: > For SMMUv3 the parent must be a S2 domain, which can be composed > into a IOMMU_DOMAIN_NESTED. > > In future the S2 parent will also need a VMID linked to the VIOMMU and > even to KVM. > > Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Reviewed-by: Nicolin Chen <nicolinc@xxxxxxxxxx>