OVMF on NVIDIA laptop with Arch host, Windows 10 guest, pcie passthrough, Looking Glass for laptop monitor, synchronized screen idle blanking, bluetooth device passthrough and hotplugging with evdev, GRUB boot entries to switch between Windows having the GPU and Arch retaining control of it
Leave a message on my ArchWiki talk page if you have any questions about my VFIO setup. https://wiki.archlinux.org/title/User_talk:Alydev
Hardware:
Configuration:
/etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3 quiet modprobe.blacklist=vfio-pci"
/etc/grub.d/40_custom
menuentry "Arch Linux - PCI Passthrough" {
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
search --no-floppy --fs-uuid --set=root d8dfdf74-8c7d-4d1e-a012-79abc959a420
echo 'Loading Linux linux ...'
linux /vmlinuz-linux root=UUID=48247929-96dd-45d0-853e-070a96bf73ce rw loglevel=3 quiet rd.driver.pre=vfio-pci intel_iommu=on vfio-pci.ids=10de:25a2,10de:2291 modprobe.blacklist=nvidia
echo 'Loading initial ramdisk ...'
initrd /initramfs-linux.img
}
/opt/persistent-evdev/etc/config
{
"cache": "/opt/persistent-evdev/cache",
"devices": {
"persist-mouse0": "/dev/input/btmouse",
"persist-mouse1": "/dev/input/by-id/usb-Razer_Razer_Naga_Trinity_00000000001A-event-mouse",
"persist-keyboard0": "/dev/input/btkeyboard",
"persist-keyboard1": "/dev/input/by-id/usb-Logitech_G512_Carbon_GX_Blue_065B38693437-event-kbd"
}
}
/etc/udev/rules.d/60-persistent-input-uinput.rules
KERNEL=="event*", ATTRS{phys}=="py-evdev-uinput", ATTRS{name}=="?*", SYMLINK+="input/by-id/uinput-$attr{name}"
/etc/udev/rules.d/80-bluetooth.rules
KERNEL=="event[0-9]|event[0-9][0-9]", SUBSYSTEM=="input", ATTRS{name}=="Keyboard K480 Keyboard", ACTION=="add", SYMLINK+="input/btkeyboard", OWNER="aly", GROUP="libvirt-qemu"
KERNEL=="event[0-9]|event[0-9][0-9]", SUBSYSTEM=="input", ATTRS{name}=="LOGI M240 Mouse", ACTION=="add", SYMLINK+="input/btmouse", OWNER="aly", GROUP="libvirt-qemu"
/etc/tmpfiles.d/10-looking-glass.conf
f /dev/shm/looking-glass 0660 USER kvm -
$HOME/.xinitrc
#!/bin/sh
fluxbox &
sleep 1
looking-glass-client -F -s
https://github.com/ge9/IddSampleDriver, configured to create 1080p display.
Looking Glass needs to select monitor #2:
C:\Program Files\Looking Glass (host)\looking-glass-host.ini
[dxgi]
adapter=0
output=2
Bit of a hack. Press enter while screens are off to pass through pause and turn the second screen back on.
%USERPROFILE%\Documents\screenoff.ps1
ssh 192.168.122.1 .local/bin/screenoff
(Add-Type '[DllImport("user32.dll")]public static extern int SendMessage(int hWnd, int hMsg, int wParam, int lParam);' -Name a -Pas)::SendMessage(-1,0x0112,0xF170,2)
pause
ssh 192.168.122.1 .local/bin/screenon
$HOME/.local/bin/screenoff
#!/bin/sh
PS="$(ps aux | grep Xorg | grep -v grep)"
export DISPLAY=$(awk '{print $(NF-4)}' <<<"$PS")
export XAUTHORITY=$(awk '{print $NF}' <<<"$PS")
xset dpms force off
$HOME/.local/bin/screenon
#!/bin/sh
PS="$(ps aux | grep Xorg | grep -v grep)"
export DISPLAY=$(awk '{print $(NF-4)}' <<<"$PS")
export XAUTHORITY=$(awk '{print $NF}' <<<"$PS")
xset dpms force on
I didn’t want to change Pipewire to running as a system daemon. This is my workaround. After booting with my PCI Passthrough boot option, I press ctrl+alt+f3, this takes me to the autologin shell, in which bashrc detects that vfio is loaded and starts the win10 VM if not already running. Obvious caveat is the security issue of autologin. But anyone with physical access to the VT already has access what’s the difference.
/etc/systemd/system/getty@tty3.service.d/autologin.conf
[Service]
ExecStart=
ExecStart=-/sbin/agetty -o '-p -f -- \\u' --noclear --autologin aly %I $TERM
$HOME/.bashrc
export LIBVIRT_DEFAULT_URI=qemu:///system
[ "$(tty)" == "/dev/tty3" ] && [ -e "/sys/bus/pci/drivers/vfio-pci/0000:01:00.0" ] && [ "$(virsh list | grep win10 | awk '{print $NF}')" != "running" ] && virsh start win10
if [ -n "$SSH_CONNECTION" ] && [ -n "$DISPLAY" ]; then
export SSH_GUEST=$(awk '{print $1}' <<< "$SSH_CONNECTION")
export DISPLAY=$SSH_GUEST:0
fi