create qemu module

hosts/MaxNixosLaptop/configuration.nix

@@ -86,27 +86,6 @@
   security.polkit.enable = true;
   environment.sessionVariables.NIXOS_OZONE_WL = "1";
 
-  virtualisation = {
-    libvirtd = {
-      enable = true;
-      qemu = {
-        package = pkgs.qemu_kvm;
-        runAsRoot = true;
-        swtpm.enable = true;
-        ovmf = {
-          enable = true;
-          packages = [
-            (pkgs.OVMF.override {
-              secureBoot = true;
-              tpmSupport = true;
-            })
-            .fd
-          ];
-        };
-      };
-    };
-  };
-
   # List services that you want to enable:
 
   # fingerprint unlock

modules/nixos/default.nix

@@ -1,11 +1,12 @@
 {
   lib,
   config,
+  system,
   ...
 }: let
   cfg = config.myConfig;
 in {
-  imports = [./bootloader.nix ./locale.nix ./greetd.nix ./rebuild.nix ./sops.nix ./sway.nix ./wifi.nix ./music.nix ./cups.nix ./gpu/amd.nix ./touch.nix ./cache.nix ./nix.nix ./update.nix ./podman.nix];
+  imports = [./bootloader.nix ./locale.nix ./greetd.nix ./rebuild.nix ./sops.nix ./sway.nix ./wifi.nix ./music.nix ./cups.nix ./gpu/amd.nix ./touch.nix ./cache.nix ./nix.nix ./update.nix ./podman.nix ./qemu.nix];
 
   options.myConfig = {
     enable = lib.mkEnableOption "my custom config";
@@ -27,6 +28,8 @@ in {
     cache.enable = true;
     autoUpdate.enable = true;
     podman.enable = true;
+    qemu.enable = true;
+    qemu.kvm = lib.mkIf (system == "x86_64-linux") true;
 
     greetd.enable = lib.mkIf cfg.desktop true;
     sway.enable = lib.mkIf cfg.desktop true;

modules/nixos/qemu.nix

@@ -0,0 +1,35 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}: let
+  cfg = config.myConfig.qemu;
+in {
+  options.myConfig.qemu = {
+    enable = lib.mkEnableOption "qemu";
+    kvm = lib.mkEnableOption "kvm for faster emulation of x86";
+  };
+
+  config = lib.mkIf cfg.enable {
+    virtualisation.
+    libvirtd = {
+      enable = true;
+      qemu = {
+        package = lib.mkIf cfg.kvm pkgs.qemu_kvm;
+        runAsRoot = true;
+        swtpm.enable = true;
+        ovmf = {
+          enable = true;
+          packages = [
+            (pkgs.OVMF.override {
+              secureBoot = true;
+              tpmSupport = true;
+            })
+            .fd
+          ];
+        };
+      };
+    };
+  };
+}