Alex, Regarding vdsm changing a device owner, Last time I asked in #virt for using usb device in vdsm hook in /dev/bus/usb/<addr> I was told that vdsm should change the owner to qemu:kvm. So for the sr-iov device /sys/bus/pci/devices/<addr>/resource*, rom, and reset libvirt should change the owner and not vdsm? Shahar Havivi.