Hi,
Have you solved this problem?
I have a similar error after rebooting the VM:
(qemu) qemu-system-x86_64: vfio-pci: Cannot read device rom at 0000:02:00.0
Device option ROM contents are probably invalid (check dmesg).
Skip option ROM probe with rombar=0, or load from file with romfile=
My vm works only for once after each host reboot.