[vfio-users] Passthrough VGA on first slot

[Nick Sukharev]

I have almost the same issue with Asrock x99 extreme 4 when I was only able
to pass the card in the second PCIE slot and mb documentation says that GPU
in this slot is not supported. The slot itself is PCE version 2. I resolved
the issue by switching to UEFI / OVMF on my VMs and now I can pass all 4
slots including primary. I also had the ROM messages before doing this.

On Fri, Oct 2, 2015 at 6:00 AM, Pedro Henrique Lara Campos <
pedro.laracampos at gmail.com> wrote:

> Hello masters of vfio. I've been playing with vfio for 3 weeks now, and
> here is a resume of what i got: When I put my loved GTX780 on the second
> pci-e slot of my GA-970A-DS3P everything works on Windows (guest) while my
> Linux (host) stays comfortable with a Radeon HD 6670.
> But, as I wouldn't be writing this email if nothing was wrong, my second
> pci-e slot is "PCIEX4" only, I believe that's because my FPS goes down and
> HDMI audio keeps crackin. I had to change the slots, my bios doesn't have
> an option to choose which GPU to use, so it uses the GTX, GRUB does it too,
> then gpu gets binded by modprobe and I have no video until XOrg starts on
> Radeon, if I start qemu, I've get:
>   "vfio_ecap_init: 0000:01:00.0 hiding ecap 0x19 at 0x900"
>   "BAR 3 mmap unsupported. Performance may be slow"
>   "vfio-pci 0000:01:00.0: Invalid ROM contents"
> No video on GTX, Windows boots normally, I can even hear notifications
> sounds, I can turn it off through "system_powerdown".
> Tried using a romfile, it only makes the third message goes away, no other
> thing changes...
>
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