On Wed, Jun 25, 2014 at 03:53:30PM +0200, Paolo Bonzini wrote: > Il 25/06/2014 15:47, Michael S. Tsirkin ha scritto: > >OK, so how about doing this: either for the ISA > >bridge, or for the VGA card itself: > > > > set subsystem vendor id to PCI_VENDOR_ID_XEN, > > set subsystem device id to PCH device id > > That would work, but the same problem would then arise for the MCH. The > driver there is banging at random places in the configuration space. > > This is why I asked for a solution that is future-proof, and since you can > make one that works for both MCH and PCH it is nice to do the work just > once. > > Paolo
Q35 has MCH, so I don't see why we can't make that work, extending it as appropriate. Doing that for PIIX is iffy. Should we really do that? Q35 is there. -- MST