+ u8 skip_nonbootable =
romfile_find("etc/skip-non-bootable-virtio") != NULL;
There is no need for a new config file. qemu can place a HALT entry
into the boot order file (qemu -boot strict=on). seabios will stop
searching for boot devices when it discovers a HALT entry, so any device
with a lower priority will not be considered for boot. Typically that
are devices with a default priority because they didn't got a bootindex
assigned. You can also use that to skip initialization altogether.