gpu

modules/default.nix

@@ -3,7 +3,7 @@
     ./fonts
     ./yazi
     ./sound
-    ./vm
+#    ./vm
     ./retro
     ./packages
     ./misc

modules/gpu/default.nix

@@ -0,0 +1,54 @@
+{ pkgs, config, ... }:
+let
+  # Change this to your username.
+  user = "joy";
+  # Change this to match your system's CPU.
+  platform = "amd";
+  # Change this to specify the IOMMU ids you wrote down earlier.
+  vfioIds = [ "10de:249c" "10de:228b" ];
+in {
+  # Configure kernel options to make sure IOMMU & KVM support is on.
+  boot = {
+    kernelModules = [ "kvm-${platform}" "vfio_virqfd" "vfio_pci" "vfio_iommu_type1" "vfio" ];
+    kernelParams = [ "${platform}_iommu=on" "${platform}_iommu=pt" "kvm.ignore_msrs=1" ];
+    extraModprobeConfig = "options vfio-pci ids=${builtins.concatStringsSep "," vfioIds}";
+  };
+
+  # Add a file for looking-glass to use later. This will allow for viewing the guest VM's screen in a
+  # performant way.
+  systemd.tmpfiles.rules = [
+      "f /dev/shm/looking-glass 0660 ${user} qemu-libvirtd -"
+  ];
+
+  # Add virt-manager and looking-glass to use later.
+  environment.systemPackages = with pkgs; [
+      virt-manager
+      looking-glass-client
+  ];
+
+  # Enable virtualisation programs. These will be used by virt-manager to run your VM.
+  virtualisation = {
+     libvirtd = {
+       enable = true;
+       extraConfig = ''
+         user="${user}"
+       '';
+
+       # Don't start any VMs automatically on boot.
+       onBoot = "ignore";
+       # Stop all running VMs on shutdown.
+       onShutdown = "shutdown";
+
+       qemu = {
+         package = pkgs.qemu_kvm;
+         ovmf = enabled;
+         verbatimConfig = ''
+            namespaces = []
+           user = "+${builtins.toString config.users.users.${user}.uid}"
+         '';
+       };
+    };
+  };
+
+  users.users.${user}.extraGroups = [ "qemu-libvirtd" "libvirtd" "disk" ];
+}

modules/packages/default.nix

@@ -57,6 +57,7 @@
   gnome.gnome-calculator
   gnome.gnome-disk-utility
   #random utils
+  pciutils
   cliphist
   wl-clipboard  
   git