Comment 4 for bug 1074207

15:19 < mdeslaur> the ovmf package could ship the qemu-system-x86_64-uefi and qemu-system-i386-uefi scripts, which
                  would just be a shell file that adds the appropriate option for the alternate directory
15:20 < mdeslaur> and a trivial distro patch could be added to libvirt to gain knowledge of those two new archs
15:20 < mdeslaur> it's also hackish, but that's where I'm at now

That seems to make the most sense, given that virt-manager can't sanely poke these qemu settings down into libvirt.