Some PCI devices especially GPUs require a ROM to work properly. The
ROM is executed by boot firmware to initialize the device. To add
a ROM to a device use the new ROM option for passthru device (e.g.
It's necessary that the ROM is executed by the boot firmware. It won't
be executed by any OS. Additionally, the boot firmware should be
configured to execute the ROM file. For that reason, it's only
possible to use a ROM when using OVMF with enabled bus enumeration.
I've split this patch into multiple commits which are available at
These smaller commits may be easier to review. I can create a pull
request at github and we can talk about the commits at github if
you like to.