On Sun, Jun 02, 2024 at 08:25:34PM -0700, Nicolin Chen wrote: > > I understand the appeal of doing this has been to minimize qemu > > changes in its ACPI parts if we tackle that instead maybe we should > > just not implement viommu to multiple piommu. It is somewhat > > complicated. > > Would you please clarify that suggestion "not implement viommu > to multiple piommu"? > > For regular nesting (SMMU), we are still doing one vSMMU in the > VMM, though VCMDQ case would be an exception.... This is what I mean, always do multiple vSMMU if there are multiple physical pSMMUs. Don't replicate any virtual commands across pSMMUs. Jason
