On 08/11/2017 13:24, Juergen Gross wrote: >> My understanding of Xen is very rusty at this point, but I think a >> "completely" legacy-free HVM domain will still have a PCI bus and the >> Xen platform device on that bus. >> >> A PVH domain just knows how to access the Xen PV features. > > A HVM domain does so, too. Today maybe only partially, but e.g. event > channels work in a HVM domain even without the Xen platform device. > Grant tables can be made working without the platform device, too, > and I'm already preparing a patch to do exactly that. What about assigned PCI devices? I think they are not PV pcifront for HVM. So the main difference in the end is the PCI bus. Paolo
