On 01/19/2011 07:11 AM, Markus Armbruster wrote:
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.
I think that's a bad idea from a forward compatibility perspective.
Regards,
Anthony Liguori
