** FOLLOW THIS STEP ONLY OF YOUR GPUs HAVE DIFFERENT PCI IDs **
otherwise use workaround from this guide: https://forum.level1techs.com/t/vfio-in-2019-pop-os-how-to-general-guide-though-draft/142287
Assigning VFIO driver to a GPU
We are ready to setup our devices to be used inside a virtual machine.
To do this, we must bind the vfio-pci driver to the device(s) we want to pass through to the virtual machine, and this is most easily done by PCI device ID.
In my case PCI device IDs of my Nvidia 450 and its audio interface are:
[10de:0dc4] and [10de:0be9]
To get around system using its own Nvidia (or AMD) driver. Wendell wrote us yet again nice tiny guide.
But first, you have to check, which driver is used for your GPU:
run:
lspci -nnv |less
and finda GPU you want to pass in the list:
Notice the Kernel driver in use is nvidia. Thats what you have to use while editing following config file
sudo nano /etc/initramfs-tools/modules
and add following lines at the end of file.
Replace nvidia on first and last line, if your kernel driver in use is different. Replace your PCI IDs with the GPU and its audio interface you want to use for virtual machine. Example:
softdep nvidia pre: vfio vfio_pci
vfio
vfio_iommu_type1
vfio_virqfd
options vfio_pci ids=10de:0dc4,10de:0be9
vfio_pci ids=10de:0dc4,10de:0be9
vfio_pci
nvidia
save and exit.
Now edit:
sudo nano /etc/modules
and add following and don’t forget to change IDs again
vfio
vfio_iommu_type1
vfio_pci ids=10de:0dc4,10de:0be9
save and exit
We will also create explicit configurations for the modules in /etc/modprobe.d
A) for AMD GPU:
sudo nano /etc/modprobe.d/amdgpu.conf
and add following:
softdep amdgpu pre: vfio vfio_pci
B) for NVIDIA GPU
sudo nano /etc/modprobe.d/nvidiagpu.conf
and add following:
softdep nvidia pre: vfio vfio_pci
even more configs to edit!
sudo nano /etc/modprobe.d/vfio_pci.conf
and add following: REPLACE IDS, AGAIN
options vfio_pci ids=10de:0dc4,10de:0be9
then run:
sudo grub-mkconfig; sudo update-grub; sudo update-initramfs -k all -c
REBOOT AND PRAY
