Add the rpcs3 config.yml file.

nix/configuration/roles/rpcs3/default.nix

@@ -5,6 +5,14 @@
   ...
 }:
 
+let
+  rpcs3_config_yaml = (
+    pkgs.writeTextFile {
+      name = "config.yml";
+      text = lib.generators.toYAML { } config.me.rpcs3.config;
+    }
+  );
+in
 {
   imports = [ ];
 
@@ -15,6 +23,29 @@
       example = true;
       description = "Whether we want to install rpcs3.";
     };
+
+    rpcs3.config = lib.mkOption {
+      type = lib.types.nullOr lib.types.attrs;
+      default = {
+        VFS = {
+          "Enable /host_root/" = false;
+        };
+        Video = {
+          "Write Color Buffers" = false;
+          VSync = true;
+          "Performance Overlay" = {
+            Enabled = true;
+          };
+        };
+        Miscellaneous = {
+          "Pause emulation on RPCS3 focus loss" = true;
+          "Start games in fullscreen mode" = true;
+          "Pause Emulation During Home Menu" = true;
+        };
+      };
+      example = null;
+      description = "RPCS3's config.yml in nix form.";
+    };
   };
 
   config = lib.mkIf config.me.rpcs3.enable (
@@ -39,8 +70,21 @@
           }
         ];
 
-        # .config/rpcs3/config.yml
-        # .config/rpcs3/GuiConfigs/CurrentSettings.ini
+        me.rpcs3.config.Core."Use LLVM CPU" =
+          lib.mkIf (config.me.optimizations.enable) config.me.optimizations.arch;
+
+        home-manager.users.talexander =
+          { pkgs, ... }:
+          {
+            home.file.".config/rpcs3/config.yml" = lib.mkIf (config.me.rpcs3.config != null) {
+              source = rpcs3_config_yaml;
+            };
+            home.file.".config/rpcs3/GuiConfigs/CurrentSettings.ini" = {
+              source = ./files/CurrentSettings.ini;
+            };
+          };
+
+        # TODO?: .config/rpcs3/GuiConfigs/CurrentSettings.ini
 
         environment.persistence."/persist" = lib.mkIf (!config.me.buildingIso) {
           hideMounts = true;
@@ -84,6 +128,13 @@
                 group = "talexander";
                 mode = "0755";
               }
+              {
+                # Controller config.
+                directory = ".config/rpcs3/input_configs";
+                user = "talexander";
+                group = "talexander";
+                mode = "0755";
+              }
             ];
           };
         };