[vfio-users] Booting from VirtIO disk

[rndbit]

I bumped into this strange issue - i can no longer boot windows guest
from VirtIO disk. Windows logo shows up briefly and then it throws
INACCESSIBLE_BOOT_DEVICE error. Switching disk to IDE works. Interesting
part is that i actually have installed virtio drivers and virtio disks
added after VM is booted can be accessed without any problem. Since i
can see actual windows logo and error message i suppose it goes half-way
at least and firmware can understand virtio disks just fine. Im out of
ideas here. Does anyone have any clue what could be wrong here?