Added vga passthrough notes...

src/VGA Passthrough/VGA Passthrough (Manjaro)/README.md

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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

src/VGA Passthrough/VGA Passthrough (Manjaro)/Scripts/list_iommu_groups.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
+
+
+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 $@;

src/VGA Passthrough/VGA Passthrough (Manjaro)/Scripts/manjaro_help.sh

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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

src/VGA Passthrough/VGA Passthrough (Manjaro)/Scripts/uninstall.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
+
+
+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 $@;

src/VGA Passthrough/VGA Passthrough (Manjaro)/Scripts/vfio-hooks

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

src/VGA Passthrough/VGA Passthrough (Manjaro)/Scripts/vfio-install

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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 $@;

src/VGA Passthrough/VGA Passthrough (Manjaro)/Scripts/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
+
+
+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 $@;

src/VGA Passthrough/VGA Passthrough (Manjaro)/vfio.conf

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