nixos/hosts/zeke/virt.nix

{
  lib,
  pkgs,
  ...
}:

let
  passthru = [
    "1002:164e" # Raphael - embedded GPU
    "1002:1640" # Rembrandt - Audio
    #"10de:2507" # RTX 3050 video
    #"10de:228e" # RTX 3050 audio
  ];
in
{
  greg.runner.enable = true;
  # These options enable sharing of the GPU with the VM
  boot = {
    # Order matters here, to prevent the AMD driver from getting to the driver before
    # vfio-pci does
    initrd.kernelModules = [
      "vfio_pci"
      "vfio"
      "vfio_iommu_type1"

      #"amdgpu"
      #"nvidia"
      #"nvidia_modeset"
      #"nvidia_uvm"
      #"nvidia_drm"
    ];
    kernelParams = [
      "amd_iommu=on"
      "iommu=pt"
      ("vfio-pci.ids=" + (lib.concatStringsSep "," passthru))
    ];
  };

  hardware.graphics.enable = true;

  systemd.services = {
    "libvirt-nosleep@" = {
      description = "Prevent sleep while %i is running";
      serviceConfig = {
        Type = "simple";
        ExecStart = ''
          ${pkgs.systemd}/bin/systemd-inhibit --what=sleep --why="Libvirt domain %i is running" --who=%U --mode=block sleep infinity
        '';
      };
    };
  };

  virtualisation = {
    libvirtd = {
      extraConfig = ''
        log_filters="1:qemu"
        log_outputs="1:file:/var/log/libvirt/libvirtd.log"
      '';
      hooks.qemu = {
        win10 = lib.getExe pkgs.qemu-hook;
      };
    };

    spiceUSBRedirection.enable = true;
  };
}