[Pkg-libvirt-maintainers] Bug#575628: Bug#575628: pxe not working with libvirt 0.7.7 + qemu-kvm 0.12

[Michael Tokarev]

Brian Kroth wrote:
> Guido Günther <agx at sigxcpu.org> 2010-03-28 14:53:
[]
>> Could you try to add execute this "by hand" and find the offending
>> option?
>>  -- Guido
> 
> Yeah, I did that.  It's as the other bug I linked said.  Basically,
> libvirt changed the way it arranges the command lines from the XML so
> that what was this in <=0.7.5:
> 
> -net nic,macaddr=52:54:00:a1:90:92,vlan=0,model=virtio,name=virtio.0 -net tap,fd=22,vlan=0,name=tap.0
> 
> became this in 0.7.7 (possibly also 0.7.6):
> 
> -device virtio-net-pci,vlan=0,id=net0,mac=52:54:00:a1:90:92,bus=pci.0,addr=0x4 -net tap,fd=23,vlan=0,name=hostnet0
> 
> The problem appears to be that qemu 0.12.3 (possibly for earlier
> versions as well) doesn't parse the "-device virtio-net..." option as
> being a NIC, so it fails to boot from it.  I have tried this with other
> NIC models as well and they all result in the same problem - if the NIC
> definition is given as a "-device" instead of a "-net nic", then qemu
> refuses to boot from it.

Very good findings.  It appears to be a kvm bug after all, -- I don't see
a way to tell it to boot from network with -device..-net pair, only with
-net..-net pair.  Confirmed. I'll check this in more detail.

Thanks!

/mjt