<div dir="ltr">I believe it's only needed to check if your video card bios supports UEFI with rom-parser. You can optionally pass it to qemu, but I haven't needed to. </div><div class="gmail_extra"> <div class="gmail_quote">On Fri, Feb 26, 2016 at 3:54 AM, Daniel Pocock <<a href="mailto:daniel@pocock.pro" target="_blank">daniel@pocock.pro</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> In which cases are these ROMs actually needed? For example, is the ROM needed if the passthrough video device is secondary display? Is the ROM needed if using UEFI / OVMF instead of SeaBIOS? I've extracted ROMs from each GPU using the method: find /sys/devices -name rom to discover the devices with a ROM. For the device I want to use, I've used something like the following to extract the ROM (based on the paths found by the find command): ROM=/sys/devices/pci0000\:40/0000\:40\:03.0/0000\:42\:00.0/rom echo 1 | tee "${ROM}" cat "${ROM}" > my-vga-device.rom I've also read that some devices modify a copy of their ROM data during boot. Does the method described above access the original ROM content or the modified content? If it is accessing modified content, is there a way to get the original ROM content, either generically or in a method specific to each vendor? _______________________________________________ vfio-users mailing list <a href="mailto:vfio-users@redhat.com">vfio-users@redhat.com</a> <a href="https://www.redhat.com/mailman/listinfo/vfio-users" rel="noreferrer" target="_blank">https://www.redhat.com/mailman/listinfo/vfio-users</a> </blockquote></div> </div>