For AMD the connection between IOMMU and x2APIC is less strong, hence even if unlikely to occur we would better deal correctly with XT being unavailable (for whatever reasons) in particular when x2APIC is already enabled on a system.
1: correct handling when XT's prereq features are unavailable 2: without XT, x2APIC needs to be forced into physical mode Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
