Added vga passthrough notes...

This commit is contained in:
maximstewart 2021-02-25 15:51:00 -06:00
parent c0a5e1f876
commit 144c110b73
15 changed files with 202 additions and 0 deletions

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# Passthrough Helper for Manjaro
Run this script using su instead of sudo. The ">" redirects of echo will not work otherwise.
# Edit /etc/default/grub
intel_iommu=on (or) amd_iommu=on\
rd.driver.pre=vfio-pci\
kvm.ignore_msrs=1
# Edit /etc/mkinitcpio.conf
MODULES="vfio_pci vfio vfio_iommu_type1 vfio_virqfd"\
FILES="/usr/bin/vfio-pci-override.sh"\
Hooks="... vfio ...."
# Tutorial
* https://www.youtube.com/watch?v=QlGx0XvWuag
# "Error 43: Driver failed to load" on Nvidia GPUs passed to Windows VMs
* https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF#%22Error_43:_Driver_failed_to_load%22_on_Nvidia_GPUs_passed_to_Windows_VMs
# Sources
* https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF#Using_identical_guest_and_host_GPUs
* https://forum.manjaro.org/t/virt-manager-fails-to-detect-ovmf-uefi-firmware/110072

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#!/bin/bash
# . CONFIG.sh
# set -o xtrace ## To debug scripts
# set -o errexit ## To exit on error
# set -o errunset ## To exit if a variable is referenced but not set
function main() {
SCRIPTPATH="$( cd "$(dirname "")" >/dev/null 2>&1 ; pwd -P )"
cd "${SCRIPTPATH}"
echo "Working Dir: " $(pwd)
shopt -s nullglob
for d in /sys/kernel/iommu_groups/*/devices/*; do
n=${d#*/iommu_groups/*}; n=${n%%/*}
printf 'IOMMU Group %s ' "$n"
lspci -nns "${d##*/}"
done;
}
main $@;

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# Sources:
# https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF#Using_identical_guest_and_host_GPUs
# https://forum.manjaro.org/t/virt-manager-fails-to-detect-ovmf-uefi-firmware/110072
VERSION=`lsb_release -r | cut -d ' ' -f 2 | cut -d '.' -f 1`
# Backup files
mkdir Backup
chmod +x uninstall.sh
cp /etc/default/grub Backup
cp /etc/mkinitcpio.conf Backup
# Edit grub amd_iommu=on or intel_iommu=on rd.driver.pre=vfio-pci kvm.ignore_msrs=1
nano /etc/default/grub
update-grub
# Install required packages
pacman -S vim qemu virt-manager ovmf dnsmasq ebtables iptables
# Allow libvirt to autostart
systemctl enable libvirtd.service
# Copy necessary files
cp vfio-pci-override.sh /usr/bin/vfio-pci-override.sh
chmod +x /usr/bin/vfio-pci-override.sh
cp vfio-install /etc/initcpio/install/vfio
cp vfio-hooks /etc/initcpio/hooks/vfio
cp vfio.conf /etc/modprobe.d/
# Edit mkinitcpio.conf
# MODULES="vfio_pci vfio vfio_iommu_type1 vfio_virqfd"
# FILES="/usr/bin/vfio-pci-override.sh"
# HOOKS="... vfio ...."
nano /etc/mkinitcpio.conf
mkinitcpio -P
# Workaround libvirt bug in previous versions of Manjaro:
# https://forum.manjaro.org/t/virt-manager-fails-to-detect-ovmf-uefi-firmware/110072
if [ $VERSION -lt 20 ]
then
echo 'nvram = [ "/usr/share/ovmf/x64/OVMF_CODE.fd:/usr/share/ovmf/x64/OVMF_VARS.fd" ]' >> /etc/libvirt/qemu.conf
mkdir -p /etc/qemu/firmware
sed 's#qemu/edk2-x86_64-code.fd#ovmf/x64/OVMF_CODE.fd#;s#qemu/edk2-i386-vars.fd#ovmf/x64/OVMF_VARS.fd#' < /usr/share/qemu/firmware/60-edk2-x86_64.json > /etc/qemu/firmware/10-ovmf-workaround.json
systemctl restart libvirtd
fi

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#!/bin/bash
# . CONFIG.sh
# set -o xtrace ## To debug scripts
# set -o errexit ## To exit on error
# set -o errunset ## To exit if a variable is referenced but not set
function main() {
SCRIPTPATH="$( cd "$(dirname "")" >/dev/null 2>&1 ; pwd -P )"
cd "${SCRIPTPATH}"
echo "Working Dir: " $(pwd)
rm /usr/bin/vfio-pci-override.sh
rm /etc/initcpio/install/vfio
rm /etc/initcpio/hooks/vfio
rm /etc/modprobe.d/vfio.conf
if [ -a Backup/grub ]
then
rm /etc/default/grub
cp Backup/grub /etc/default/
fi
if [ -a Backup/mkinitcpio.conf ]
then
rm /etc/mkinitcpio.conf
cp Backup/mkinitcpio.conf /etc/
fi
mkinitcpio -P
}
main $@;

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#!/usr/bin/bash
run_hook() {
msg ":: Triggering vfio-pci override"
/bin/sh /usr/bin/vfio-pci-override.sh
}

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#!/bin/bash
# . CONFIG.sh
# set -o xtrace ## To debug scripts
# set -o errexit ## To exit on error
# set -o errunset ## To exit if a variable is referenced but not set
build() {
add_file /usr/bin/vfio-pci-override.sh
add_runscript
}
function main() {
SCRIPTPATH="$( cd "$(dirname "")" >/dev/null 2>&1 ; pwd -P )"
cd "${SCRIPTPATH}"
echo "Working Dir: " $(pwd)
build
}
main $@;

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#!/bin/bash
# . CONFIG.sh
# set -o xtrace ## To debug scripts
# set -o errexit ## To exit on error
# set -o errunset ## To exit if a variable is referenced but not set
function main() {
SCRIPTPATH="$( cd "$(dirname "")" >/dev/null 2>&1 ; pwd -P )"
cd "${SCRIPTPATH}"
echo "Working Dir: " $(pwd)
for i in /sys/bus/pci/devices/*/boot_vga; do
if [ $(cat "$i") -eq 0 ]; then
GPU="${i%/boot_vga}"
AUDIO="$(echo "$GPU" | sed -e "s/0$/1/")"
echo "vfio-pci" > "$GPU/driver_override"
if [ -d "$AUDIO" ]; then
echo "vfio-pci" > "$AUDIO/driver_override"
fi
fi
done
modprobe -i vfio-pci
}
main $@;

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install vfio-pci /usr/bin/vfio-pci-override.sh
options vfio-pci disable_vga=1 allow_unsafe_interrupts=1