At 07:47 +0000 on 20 Jun (1371714432), Paul Durrant wrote: > > > I agree. If this is really the only solution, we would need to have > > > both versions presented to the guest so that old drivers continue to > > > work without any intervention. > > > > I suspect that if we expose both, both sets of drivers try to run the > > same PV connections, and hilarity ensues. > > > > Actually I think I can make that work, and it is the conclusion I came > to after Alex's comment.
Ah, nice! In that case, I'm a lot less worried -- we can just expose both versions/devices by default and there's no need for a visible control knob tied to driver version (except maybe for debugging). It means an 'unsupported' device appearing on other/older OSes, which is unfortunate, but ISTR only Windows really complains visibly about that. Tim.