[ovirt-users] Use dedicated I/O service domain in KVM

Hi, I want to use a dedicated guest VM to handle I/O request just as I/O service domain used in xen. Specifically, using network I/O as an example, I should directly assign the NIC to one guest VM (using pci-assign option), after that all other guest VMs should perform network I/O through that VM rather than the host OS. Is there currently any viable approach to do this? If not, I want to implement one. Currently I'm thinking of combining nahanni shared memory and vhost architecture to implement it, is there any other suggestions? Thanks for any help.