
在 2013-01-02三的 10:22 +0000,Daniel P. Berrange写道:
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.
okay, let me try to do it.
Daniel
-- regards! li guang