GPU Passthrough, Fedora 29, 2xMSI 1080ti

Software & Operating Systems Linux
1

Hello, I am posting for some help on setting up GPU passthrough on Fedora 29. I am following this guide,
https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF

and after successfully installing nvidia’s latest driver and enabling IOMMU I’m currently at:

IOMMU Group 31 02:00.0 VGA compatible controller [0300]: NVIDIA Corporation GP102 [GeForce GTX 1080 Ti] [10de:1b06] (rev a1)
IOMMU Group 31 02:00.1 Audio device [0403]: NVIDIA Corporation GP102 HDMI Audio Controller [10de:10ef] (rev a1)
IOMMU Group 32 03:00.0 VGA compatible controller [0300]: NVIDIA Corporation GP102 [GeForce GTX 1080 Ti] [10de:1b06] (rev a1)
IOMMU Group 32 03:00.1 Audio device [0403]: NVIDIA Corporation GP102 HDMI Audio Controller [10de:10ef] (rev a1)

02:00.0 VGA compatible controller [0300]: NVIDIA Corporation GP102 [GeForce GTX 1080 Ti] [10de:1b06] (rev a1)
	Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:3602]
	Kernel driver in use: nvidia
	Kernel modules: nouveau, nvidia_drm, nvidia
02:00.1 Audio device [0403]: NVIDIA Corporation GP102 HDMI Audio Controller [10de:10ef] (rev a1)
	Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:3602]
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel
03:00.0 VGA compatible controller [0300]: NVIDIA Corporation GP102 [GeForce GTX 1080 Ti] [10de:1b06] (rev a1)
	Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:3602]
	Kernel driver in use: nvidia
	Kernel modules: nouveau, nvidia_drm, nvidia
03:00.1 Audio device [0403]: NVIDIA Corporation GP102 HDMI Audio Controller [10de:10ef] (rev a1)
	Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:3602]
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel

I now need to select one of the cards (02:00.0 and 02:00.1 in my case) and bind pci-stub or vfio-pci to it so it can be passed through. The guide notes that I need to select the GPU via PCI bus address since the vender/device IDs are identical, but after a bit of research it appears that Fedora is using a different mechanism to handle the initramfs than the guide, and that dracut is what I need?

Please correct any info, and thanks in advance for the help.

2

Too lazy to do a full research on the thing just to be right but this article might help:

Look for the same ids option piece of text just to get an idea.

3

Please let us know if you ever able to get your GPU’s passthrough working. I see you have found your first got ya, by using 2 Nvidia 1080ti’s you have made a project that is hard, to begin with, more difficult. I wish you luck, I hope you do succeed because if you do then I won’t have to buy a different video card to set up GPU passthrough on my new desktop rig.