99 lines
3.2 KiB
Nix
99 lines
3.2 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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cfg = config.ptw.virtualisation.gaming;
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in {
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options.ptw.virtualisation.gaming = {
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enable = lib.mkEnableOption "Configure virtualisation for gaming purposes";
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};
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config = lib.mkIf cfg.enable {
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environment.etc = {
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"evdev-proxy/config.toml".source = pkgs.writeText "config.toml" ''
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log_level = "INFO"
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[[device]]
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[device.Simple]
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name = "EvdevProxyMouse"
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vendor = 0x1337
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model = 0x1337
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class = "Mouse"
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[[device.Simple.selector]]
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USBIDClass = {vendor=0x046d, model=0xc531, class="Mouse"}
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[[device.Simple.selector]]
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USBIDClass = {vendor=0x046d, model=0xc07c, class="Mouse"}
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[[device]]
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[device.Simple]
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name = "EvdevProxyKeyboard"
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vendor = 0x1337
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model = 0x1338
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class = "Keyboard"
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# This is to give a deterministic /dev/input/by-id/ path to
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# the mapped version of the Tartarus evdev node.
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# (Useful for qemu)
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[[device.Simple.selector]]
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EVDEVClass = {phys="\"input-remapper\""}
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[[device.Simple.selector]]
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USBIDClass = {vendor=0x1532, model=0x011a, class="Keyboard"}
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'';
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"libvirt/hooks/qemu".source = let
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vfio-isolate-state = "/tmp/vfio-isolate-state";
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in pkgs.writeScript "qemu" ''
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#!${pkgs.stdenv.shell}
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guest=$1
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action=$2
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phase=$3
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extra=$4
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echo "called with $1 $2 $3 $4" > /dev/stderr
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if [[ "$guest" = "win10-gaming" ]]; then
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case "$action" in
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prepare)
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# Only do this while in preparation
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[[ ! "$phase" = "prepare" ]] && exit 0
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GUEST_CORES="C1-3,5-7"
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${pkgs.vfio-isolate}/bin/vfio-isolate \
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-u ${vfio-isolate-state} \
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cpu-governor performance "$GUEST_CORES" \
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cpuset-create --cpus "$GUEST_CORES" /guest.slice \
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cpuset-create --cpus C0,4 /host.slice \
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move-tasks / /host.slice \
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irq-affinity mask "$GUEST_CORES"
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;;
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stopped)
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# Only run when the VM is fully stopped
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[[ ! "$phase" = "end" ]] && exit 0
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${pkgs.vfio-isolate}/bin/vfio-isolate \
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restore ${vfio-isolate-state}
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esac
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fi
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'';
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};
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# NOTE: Workaround for libvirt's SYSCONFDIR being set to /var/lib
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# (See https://github.com/NixOS/nixpkgs/issues/51152#issuecomment-899374407)
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system.activationScripts.libvirt-hooks.text = ''
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ln -Tfs /etc/libvirt/hooks /var/lib/libvirt/hooks
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'';
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services.udev.packages = with pkgs; [ evdev-proxy ];
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systemd = {
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services = {
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libvirtd.path = with pkgs; [ vfio-isolate systemd bash ];
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};
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user.services.evdev-proxy = {
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description = "Creates virtual device to proxy evdev devices events";
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wantedBy = [ "default.target" ];
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serviceConfig = {
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Type = "simple";
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ExecStart = "${pkgs.evdev-proxy}/bin/evdev-proxy";
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Restart = "always";
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};
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};
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};
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};
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}
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