Move boot.nix to common

common/boot.nix

@@ -0,0 +1,29 @@
+{ lib, ... }:
+
+{
+  # Use the GRUB 2 boot loader.
+  boot.loader.grub.enable = true;
+  boot.loader.grub.version = 2;
+
+  # Enable GRUB2 serial console
+  boot.loader.grub.extraConfig = ''
+    serial --unit=0 --speed=115200 --word=8 --parity=no --stop=1
+    terminal_input --append serial
+    terminal_output --append serial
+  '';
+
+  # Enable serial console
+  boot.kernelParams = [
+    "console=tty1"
+    "console=ttyS0,115200"
+  ];
+
+  boot.kernelPatches = lib.singleton {
+    name = "osnoise-tracer";
+    patch = null;
+    extraStructuredConfig = with lib.kernel; {
+      OSNOISE_TRACER = yes;
+      HWLAT_TRACER = yes;
+    };
+  };
+}

common/main.nix

@@ -2,5 +2,6 @@
 
 {
   imports = [
+    ./boot.nix
   ];
 }