Gerd Hoffmann <kra...@redhat.com> writes: > On 01/18/11 18:09, Anthony Liguori wrote: >> On 01/18/2011 10:56 AM, Jan Kiszka wrote: >>> >>>> The device model topology is 100% a hidden architectural detail. >>> This is true for the sysbus, it is obviously not the case for PCI and >>> similarly discoverable buses. There we have a guest-explorable topology >>> that is currently equivalent to the the qdev layout. >> >> But we also don't do PCI passthrough so we really haven't even explored >> how that maps in qdev. I don't know if qemu-kvm has attempted to >> qdev-ify it. > > It is qdev-ified. It is a normal pci device from qdev's point of view. > > BTW: is there any reason why (vfio-based) pci passthrough couldn't > work with tcg? > >> The -device interface is a stable interface. Right now, you don't >> specify any type of identifier of the pci bus when you create a PCI >> device. It's implied in the interface. > > Wrong. You can specify the bus you want attach the device to via > bus=<name>. This is true for *every* device, including all pci > devices. If unspecified qdev uses the first bus it finds. > > As long as there is a single pci bus only there is simply no need to > specify it, thats why nobody does that today. Once q35 finally > arrives this will change of course.
As far as I know, libvirt does it already.
