Server platforms have Device scope of type "PCI Sub-hierarchy" which means the device in the device scope and all its down stream devices should be mapped to the corresponding IOMMU. ACRN maps only the device in the device scope and maps the down stream devices to DRHD with "INCLUDE_PCI_ALL" flag set, if exists, or do not map the down stream devices to any DRHD.
sainath14
commented
4 years ago
Server platforms have Device scope of type "PCI Sub-hierarchy" which means the device in the device scope and all its down stream devices should be mapped to the corresponding IOMMU. ACRN maps only the device in the device scope and maps the down stream devices to DRHD with "INCLUDE_PCI_ALL" flag set, if exists, or do not map the down stream devices to any DRHD.