nixos-config/modules/virtualisation/gaming.nix

112 lines
3.8 KiB
Nix
Raw Normal View History

{ pkgs, ... }:
{
environment.etc = {
"evdev-proxy/config.toml".source = pkgs.writeText "config.toml" ''
log_level = "INFO"
[[device]]
[device.Simple]
name = "EvdevProxyMouse"
vendor = 0x1337
model = 0x1337
class = "Mouse"
[[device.Simple.selector]]
USBIDClass = {vendor=0x046d, model=0xc531, class="Mouse"}
[[device.Simple.selector]]
USBIDClass = {vendor=0x046d, model=0xc07c, class="Mouse"}
[[device]]
[device.Simple]
name = "EvdevProxyTartarus"
vendor = 0x1337
model = 0x1338
class = "Keyboard"
# This is to give a deterministic /dev/input/by-id/ path to
# the mapped version of the Tartarus evdev node.
# (Useful for qemu)
[[device.Simple.selector]]
EVDEVClass = {phys="\"key-mapper\""}
'';
"libvirt/hooks/qemu".source = let
vfio-isolate-state = "/tmp/vfio-isolate-state";
in pkgs.writeScript "qemu" ''
#!${pkgs.stdenv.shell}
guest=$1
action=$2
phase=$3
extra=$4
if [[ "$guest" = "win10" ]]; then
case "$action" in
prepare)
# Only do this while in preparation
[[ ! "$phase" = "prepare" ]] && exit 0
sudo -u alexander systemctl --user start evdev-proxy.service
sudo -u alexander systemctl --user start scream.service
sleep 2
${pkgs.vfio-isolate}/bin/vfio-isolate \
-u ${vfio-isolate-state} \
cpu-governor performance "$GUEST_CORES" \
cpuset-create --cpus "$GUEST_CORES" /guest.slice \
cpuset-create --cpus C0,4 /host.slice \
move-tasks / /host.slice \
irq-affinity mask "$GUEST_CORES"
;;
stopped)
# Only run when the VM is fully stopped
[[ ! "$phase" = "end" ]] && exit 0
sudo -u alexander systemctl --user stop evdev-proxy.service
sudo -u alexander systemctl --user stop scream.service
${pkgs.vfio-isolate}/bin/vfio-isolate \
restore ${vfio-isolate-state}
esac
fi
'';
};
virtualisation.libvirtd = {
enable = true;
#qemuRunAsRoot = false;
qemuOvmf = true;
qemuPackage = pkgs.unstable.qemu;
qemuVerbatimConfig = ''
seccomp_sandbox = 0
cgroup_device_acl = [
"/dev/null", "/dev/full", "/dev/zero",
"/dev/random", "/dev/urandom",
"/dev/ptmx", "/dev/kvm", "/dev/kqemu",
"/dev/rtc","/dev/hpet",
"/dev/input/by-id/usb-Logitech_USB_Receiver-if02-event-mouse",
"/dev/input/by-id/usb-Razer_Razer_Tartarus_V2-event-kbd",
"/dev/input/by-id/virtual-event-EvdevProxyMouse",
"/dev/input/by-id/virtual-event-EvdevProxyTartarus",
"/dev/input/by-id/usb-Razer_Razer_BlackWidow_Ultimate-event-kbd"
]
'';
};
# NOTE: Workaround for libvirt's SYSCONFDIR being set to /var/lib
# (See https://github.com/NixOS/nixpkgs/issues/51152#issuecomment-899374407)
system.activationScripts.libvirt-hooks.text = ''
ln -Tfs /etc/libvirt/hooks /var/lib/libvirt/hooks
'';
#services.udev.packages = with pkgs; [ evdev-proxy ];
systemd = {
services.libvirtd.path = with pkgs; [ vfio-isolate systemd bash ];
#user.services.evdev-proxy = {
# description = "Creates virtual device to proxy evdev devices events";
# #wantedBy = [ "default.target" ];
# serviceConfig = {
# Type = "simple";
# ExecStart = "${pkgs.evdev-proxy}/bin/evdev-proxy";
# Restart = "always";
# };
#};
};
}