On 08/11/17 13:26, Paolo Bonzini wrote: > 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. Sure, but this is easily detectable, isn't it? Juergen
