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Create pcie-passthrough.sh
create a pcie-passthrough helper script which will modify the relevant files according to the Proxmox documentation here: https://pve.proxmox.com/wiki/PCI(e)_Passthrough
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Joseph
GitHub
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336
misc/pcie-passthrough.sh
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336
misc/pcie-passthrough.sh
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#!/bin/bash
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# Author: jpaveg
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# Adapted from: tteck (tteckster)
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# License: MIT
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# https://github.com/tteck/Proxmox/raw/main/LICENSE
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header_info() {
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clear
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cat <<"EOF"
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____
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/ __ \_________ _ ______ ___ ____ _ __
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/ /_/ / ___/ __ \| |/_/ __ `__ \/ __ \| |/_/
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/ ____/ / / /_/ /> </ / / / / / /_/ /> <
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/_/ /_/ \____/_/|_/_/ /_/ /_/\____/_/|_|
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____ __ __ __
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/ __ \____ ___________/ /_/ /_ _________ __ ______ _/ /_
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/ /_/ / __ `/ ___/ ___/ __/ __ \/ ___/ __ \/ / / / __ `/ __ \
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/ ____/ /_/ (__ |__ ) /_/ / / / / / /_/ / /_/ / /_/ / / / /
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/_/ \__,_/____/____/\__/_/ /_/_/ \____/\__,_/\__, /_/ /_/
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/____/
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_____ _ __
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/ ___/__________(_)___ / /_
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\__ \/ ___/ ___/ / __ \/ __/
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___/ / /__/ / / / /_/ / /_
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/____/\___/_/ /_/ .___/\__/
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/_/
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EOF
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}
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RD=$(echo "\033[01;31m")
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YW=$(echo "\033[33m")
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GN=$(echo "\033[1;92m")
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CL=$(echo "\033[m")
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BFR="\\r\\033[K"
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HOLD="-"
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CM="${GN}✓${CL}"
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CROSS="${RD}✗${CL}"
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set -euo pipefail
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shopt -s inherit_errexit nullglob
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GRUB_FILE="/etc/default/grub"
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GRUB_FILE_BACKUP="/etc/default/grub.bak"
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SYSTEMD_FILE="/etc/kernel/cmdline"
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SYSTEMD_FILE_BACKUP="/etc/kernel/cmdline.bak"
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MODULES_FILE="/etc/modules"
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MODULES_FILE_BACKUP="/etc/modules.bak"
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CPU_TYPE="unknown"
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msg_info() {
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local msg="$1"
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echo -ne " ${HOLD} ${YW}${msg}..."
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}
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msg_ok() {
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local msg="$1"
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echo -e "${BFR} ${CM} ${GN}${msg}${CL}"
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}
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msg_error() {
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local msg="$1"
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echo -e "${BFR} ${CROSS} ${RD}${msg}${CL}"
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}
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check_cpu_type() {
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msg_info "Checking CPU Type"
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# Check the Vendor ID using lscpu
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vendor_id=$(lscpu | grep "Vendor ID")
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vendor_id=$(echo $vendor_id | awk '{print $3}')
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if [ "$vendor_id" == "GenuineIntel" ]; then
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msg_info "Intel CPU detected"
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CPU_TYPE="intel"
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elif [ "$vendor_id" == "AuthenticAMD" ]; then
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msg_info "AMD CPU detected"
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CPU_TYPE="amd"
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else
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msg_error "Unknown CPU vendor, exiting"
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exit
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fi
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}
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modify_grub_cmdline() {
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# Make a backup of the GRUB file
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sudo cp $GRUB_FILE $GRUB_FILE_BACKUP
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# Extract the content of GRUB_CMDLINE_LINUX_DEFAULT using sed
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cmdline_flags=$(sed -n 's/^GRUB_CMDLINE_LINUX_DEFAULT="\(.*\)"/\1/p' "$GRUB_FILE")
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# Initialize an associative array to hold key-value pairs
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declare -A kv_pairs
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# Initialize a string to hold flags
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flags=""
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# Iterate over each item in the cmdline_flags
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for item in $cmdline_flags; do
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if [[ "$item" != *"="* ]]; then
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# If it's a flag, add it to the flags string
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flags="$flags $item"
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else
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# If it's a key-value pair, split it and add to associative array
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IFS='=' read -r key value <<<"$item"
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kv_pairs["$key"]="$value"
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fi
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done
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# Use whiptail to ask user if they want to enable IOMMU passthrough mode
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if (whiptail --title "GRUB - IOMMU Passthrough" --yesno "Do you want to enable IOMMU passthrough mode?" 10 60); then
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kv_pairs["iommu"]="pt"
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else
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unset kv_pairs["iommu"] # Remove the key if the user selects "No"
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fi
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# Check if CPU_TYPE is Intel before enabling Intel IOMMU
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if [ "$CPU_TYPE" == "intel" ]; then
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if (whiptail --title "GRUB - Intel IOMMU" --yesno "Do you want to enable Intel IOMMU?" 10 60); then
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kv_pairs["intel_iommu"]="on"
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else
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unset kv_pairs["intel_iommu"] # Remove the key if the user selects "No"
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fi
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fi
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# Reconstruct the new GRUB_CMDLINE_LINUX_DEFAULT line
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new_cmdline_flags="$flags"
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for key in "${!kv_pairs[@]}"; do
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new_cmdline_flags="$new_cmdline_flags $key=${kv_pairs[$key]}"
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done
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# Remove leading space
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new_cmdline_flags=$(echo "$new_cmdline_flags" | sed 's/^ //')
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# Set the updated flags and key-value pairs in GRUB file
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msg_info "Setting GRUB_CMDLINE_LINUX_DEFAULT flags"
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sudo sed -i "/GRUB_CMDLINE_LINUX_DEFAULT=/ s/\(GRUB_CMDLINE_LINUX_DEFAULT=\).*/\1\"$new_cmdline_flags\"/" $GRUB_FILE
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# Output the updated GRUB_CMDLINE_LINUX_DEFAULT line for verification
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msg_ok "Modified /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT=\"$new_cmdline_flags\""
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# Run update-grub to finish changes
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msg_info "Running update-grub to finalize changes to cmdline"
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# sudo update-grub
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}
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modify_systemd_boot_cmdline() {
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# Make a backup of the cmdline file
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sudo cp "$SYSTEMD_FILE" "$SYSTEMD_FILE_BACKUP"
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# Extract the content of the cmdline file
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cmdline_flags=$(cat "$SYSTEMD_FILE")
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# Initialize an associative array to hold key-value pairs
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declare -A kv_pairs
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# Initialize a string to hold flags
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flags=""
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# Iterate over each item in the cmdline_flags
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for item in $cmdline_flags; do
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if [[ "$item" != *"="* ]]; then
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# If it's a flag, add it to the flags string
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flags="$flags $item"
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else
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# If it's a key-value pair, split it and add to associative array
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IFS='=' read -r key value <<<"$item"
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kv_pairs["$key"]="$value"
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fi
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done
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# Use whiptail to ask user if they want to enable IOMMU passthrough mode
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if (whiptail --title "SYSTEMD - IOMMU Passthrough" --yesno "Do you want to enable IOMMU passthrough mode?" 10 60); then
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kv_pairs["iommu"]="pt"
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else
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unset kv_pairs["iommu"] # Remove the key if the user selects "No"
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fi
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# Check if CPU_TYPE is Intel before enabling Intel IOMMU
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if [ "$CPU_TYPE" == "intel" ]; then
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if (whiptail --title "SYSTEMD - Intel IOMMU" --yesno "Do you want to enable Intel IOMMU?" 10 60); then
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kv_pairs["intel_iommu"]="on"
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else
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unset kv_pairs["intel_iommu"] # Remove the key if the user selects "No"
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fi
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fi
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# Reconstruct the new kernel cmdline
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new_cmdline_flags="$flags"
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for key in "${!kv_pairs[@]}"; do
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new_cmdline_flags="$new_cmdline_flags $key=${kv_pairs[$key]}"
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done
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# Remove leading space
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new_cmdline_flags=$(echo "$new_cmdline_flags" | sed 's/^ //')
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# Set the updated flags and key-value pairs in cmdline file
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msg_info "Setting kernel cmdline flags"
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echo -n "$new_cmdline_flags" | sudo tee "$SYSTEMD_FILE" >/dev/null
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# Output the updated cmdline for verification
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msg_ok "Modified /etc/kernel/cmdline: \"$new_cmdline_flags\""
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# Run proxmox-boot-tool refresh to apply changes
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msg_info "Running proxmox-boot-tool refresh to apply changes"
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# sudo proxmox-boot-tool refresh
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}
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modify_kernel_modules() {
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# List of required modules
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required_modules=("vfio" "vfio_iommu_type1" "vfio_pci")
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# Check the kernel version
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KERNEL_VERSION=$(uname -r | cut -d'-' -f1)
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KERNEL_MAJOR=$(echo "$KERNEL_VERSION" | cut -d'.' -f1)
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KERNEL_MINOR=$(echo "$KERNEL_VERSION" | cut -d'.' -f2)
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# Add vfio_virqfd only if the kernel version is older than 6.2
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if [ "$KERNEL_MAJOR" -lt 6 ] || { [ "$KERNEL_MAJOR" -eq 6 ] && [ "$KERNEL_MINOR" -lt 2 ]; }; then
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echo $KERNEL_MAJOR $KERNEL_MINOR $KERNEL_VERSION
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required_modules+=("vfio_virqfd")
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fi
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# Make a backup of the current modules file
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sudo cp "$MODULES_FILE" "$MODULES_FILE_BACKUP"
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# Load current modules into an associative array for quick lookup
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declare -A current_modules
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if [ -f "$MODULES_FILE" ]; then
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while IFS= read -r line; do
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# Skip empty lines and comments
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[[ "$line" =~ ^#.*$ ]] || [[ -z "$line" ]] && continue
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current_modules["$line"]=1
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done <"$MODULES_FILE"
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fi
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# Initialize a flag to track if we need to update the modules file
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update_needed=false
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# Check each required module and add it if not present
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for module in "${required_modules[@]}"; do
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# Use a default value for the lookup to avoid unbound variable errors
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if [[ -z "${current_modules[$module]+x}" ]]; then
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echo "$module" | sudo tee -a "$MODULES_FILE" >/dev/null
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update_needed=true
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msg_info "Added $module to $MODULES_FILE"
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else
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msg_ok "$module is already present in $MODULES_FILE"
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fi
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done
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# Refresh initramfs if we added any new modules
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if [ "$update_needed" = true ]; then
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msg_info "Updating initramfs to apply module changes"
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sudo update-initramfs -u -k all
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msg_ok "Initramfs updated successfully"
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else
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msg_ok "No changes needed for $MODULES_FILE"
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fi
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}
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# Main
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start_routines() {
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header_info
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check_cpu_type
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# Display a whiptail menu for the user to choose an option
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OPTION=$(whiptail --title "Select Command Line Modification" --menu "Choose an option:" 15 60 4 \
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"1" "Modify GRUB cmdline" \
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"2" "Modify systemd-boot cmdline" \
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"3" "Modify both cmdlines" \
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"4" "Exit" 3>&1 1>&2 2>&3)
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# Act based on the user's choice
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case $OPTION in
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"1")
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modify_grub_cmdline
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;;
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"2")
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modify_systemd_boot_cmdline
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;;
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"3")
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modify_grub_cmdline || msg_error "There was an error modifying the GRUB cmdline, continuing to next step."
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modify_systemd_boot_cmdline || msg_error "There was an error modifying the SYSTEMD-BOOT cmdline, continuing to next step."
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;;
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"4")
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echo "Exiting without making any changes."
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;;
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*)
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echo "Invalid option. Exiting."
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;;
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esac
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echo "Debug: Calling modify_kernel_modules"
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modify_kernel_modules
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}
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echo -e "\nThis script will modify your cmdline and kernel flags to enable passthrough & vfio.\n"
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while true; do
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read -p "Start the Proxmox VE Passthrough Script (y/n)?" yn
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case $yn in
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[Yy]*) break ;;
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[Nn]*)
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clear
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exit
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;;
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*) echo "Please answer yes or no." ;;
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esac
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done
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if ! pveversion | grep -Eq "pve-manager/8.[0-2]"; then
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msg_error "This version of Proxmox Virtual Environment is not supported"
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echo -e "Requires Proxmox Virtual Environment Version 8.0 or later."
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echo -e "Exiting..."
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sleep 2
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exit
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fi
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start_routines
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# Notification to the user
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echo -e "\n\nScript execution complete."
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# Notify the user about the need to reboot and verify IOMMU
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echo -e "To apply the changes, please reboot your system."
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# Provide instructions to verify IOMMU is enabled
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echo -e "After rebooting, run the following command to ensure IOMMU is enabled:"
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echo -e " dmesg | grep -e DMAR -e IOMMU -e AMD-Vi"
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# Inform about the backup files
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echo -e "\nBackup files have been created for your safety:"
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echo -e " $GRUB_FILE_BACKUP"
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echo -e " $SYSTEMD_FILE_BACKUP"
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echo -e " $MODULES_FILE_BACKUP"
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# Provide link for further information
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echo -e "\nFor more information or if you encounter issues, please visit:"
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echo -e " https://pve.proxmox.com/wiki/PCI(e)_Passthrough"
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