Hey,
Here's a series of patches to (mostly) support NIC hotplug with
qemu 0.10.x or later.
qemu-0.10.0 introduced the host_net_add monitor command without
which we cannot do NIC hotplug, so we do not try and support hotplug with
older versions of KVM.
With qemu-0.11.0 we will be able to pass a tap file descriptor
over the monitor, but until then we cannot support 'bridge' and 'network'
type interfaces. A forthcoming patch series will rectify that.
Cheers,
Mark.