On Thu, Jan 20, 2011 at 09:44:05AM +0100, Gerd Hoffmann wrote: > Hi, > > >For (2), you cannot use bus=X,addr=Y because it makes assumptions about > >the PCI topology which may change in newer -M pc's. > > Why should the PCI topology for 'pc' ever change? > > We'll probably get q35 support some day, but when this lands I > expect we'll see a new machine type 'q35', so '-m q35' will pick the > ich9 chipset (which will have a different pci topology of course) > and '-m pc' will pick the existing piix chipset (which will continue > to look like it looks today).
If the topology does ever change (eg in the kind of way anthony suggests, first bus only has the graphics card), I think libvirt is going to need a little work to adapt to the new topology, regardless of whether we currently specify a bus= arg to -device or not. I'm not sure there's anything we could do to future proof us to that kind of change. Regards, Daniel -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
