Re: [libvirt] [PATCH 0/3] add pci-bridge device and address type

On Wed, Dec 26, 2012 at 09:00:06AM +0800, liguang wrote: > Now, it's unnecessary to arrange devices into multi-pci-bus, > for example: > <sound model='ac97'> > <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> > </sound> > <video> > <model type='cirrus' vram='9216' heads='1'/> > <address type='pci' domain='0x0000' bus='0x1' slot='0x02' function='0x0'/> > </video> > libvirt will complain about "bus != 0", > fortunately, qemu supports pci-to-pci bridge, > if we want to use multi-pci-bus, we can define > 2 pci bridge devices then attach 1 to the other > as a subordinate pci-bus, so, 2 pci-buses appear. > for example: > <pci-bridge type='root'/> > <pci-bridge type='subordinate'> > <address type='pci-bridge' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> > </pci-bridge> We shouldn't be introducing a new <pci-bridge> device for this. The existing <controller> element is intended to handle all types of bus devices. Just need to define a new controller type.

Daniel