On Wed, Jun 17, 2015 at 06:16:19PM +0200, Paolo Bonzini wrote: > > > On 17/06/2015 16:50, Michael S. Tsirkin wrote: > > > > I just tried, set prog_if to different values, sure it failed. > > > > > > How so? It's just a byte in config space.
Why does it fail? Because pci core migrates it and validates it on both sides. > > > But even then, fixing > > > migration is just a side effect of keeping config space consistent for a > > > given machine type (i.e. not changing hardware type under the guest's > > > feet). > > > > David's patches are also guest visible, are they not? > > We are losing state guest can indirectly observe, right? > > One case only happens during migration, the other does not. > > Paolo True - apparently the bug was only in the migration stream, not the functionality? -- MST
