iommu group check

#!/bin/bash
shopt -s nullglob
for d in /sys/kernel/iommu_groups/*/devices/*; do
    n=${d#*/iommu_groups/*}; n=${n%%/*}
    printf 'IOMMU Group %s ' "$n"
    lspci -nns "${d##*/}"
done;

make sure only to add pci ids of graphics card and associated audio device, not the root if in the same group.

configure vfio-pci

change IDs to match those found through lspci for your specific card

/etc/modprobe.d/vfio.conf

options vfio-pci ids=10de:13c2,10de:0fbb

to load kernel modules:

make file in /etc/modules-load.d/ (may need to make directory first)

file can be called anything with a .conf after it. modules are listed one per line. I loaded

• vfio
• vfio-pci
• vfio-virqfd

dracut is used to make initramfs

its config is /etc/dracut.conf.d/dracut.conf

need to add kernel modules to initramfs

use add_drivers+="vfio-pci vfio vfio_iommu_type1 vfio_virqfd" as an example

also need to add_dracutmodules+="kernel-modules" in order for dracut to look at modprobe/modules-load

I also needed to blacklist nouvaeu on the host using a config file in /etc/modprobe.d/ containing blacklist nouveau and in dracut.conf using `omit_drivers+=“nouveau”

regen initramfs using dracut --force to overwrite the existing one

getting OVMF

it is not in xbps so need to manually download from https://www.kraxel.org/repos/jenkins/edk2/ as of the writing of this document. download the ovmf appropriate either 32 or 64 bit version then use

rpm2cpio <file>.rpm | xz -d | cpio -idmv

otherwise you could try:

rpm2cpio <file>.rpm | lzma -d | cpio -idmv

to extract the files needed.

install rpmextract package xbps

copy files in ./usr/share/edk2.git/ovmf-x64 to /usr/share/ovmf

and then set the config option in /etc/libvirt/qemu.conf

nvram to the appropriate files. smm varients include secure boot code, csm varients include legacy compat modules. code and vars are separate files taht are both contained in OVMF base.

need to add user to kvm and libvirt groups