GPU Passthrough with Qemu/Libvirt on Linux

• Identify the PCI IDs

lspci -nn | grep -E "NVIDIA"

In our case our IDs are 11cd:39b3,11cd:21vc.

• Put the following in GRUB_CMDLINE_LINUX_DEFAULT= inside /etc/default/grub

amd_iommu=on iommu=pt vfio-pci.ids=11cd:39b3,11cd:21vc

• Update GRUB

sudo grub-mkconfig -o /boot/grub/grub.cfg

• Reboot

sudo reboot

• Isolate GPU

sudo vim /etc/modprobe.d/vfio.conf

Put the following inside this conf file

options vfio-pci ids=11cd:39b3,11cd:21vc
softdep nvidia pre: vfio-pci

• Update initramfs

sudo mkinitcpio -P

• Reboot

sudo reboot

• Verify the kernal driver in use. It should be using vfio-pci as the kernal driver for the GPU.

lspci -k | grep -E "vfio-pci|NVIDIA"

Note: you may not see the GPU inside the VM before installing the drivers.