mcelog: init Machine Check Exception Logging Daemon service

nixos/modules/hardware/mcelog.nix

@@ -0,0 +1,37 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+{
+  meta.maintainers = [ maintainers.grahamc ];
+  options = {
+
+    hardware.mcelog = {
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Enable the Machine Check Exception logger.
+        '';
+      };
+    };
+
+  };
+
+  config = mkIf config.hardware.mcelog.enable {
+    systemd.services.mcelog = {
+      description = "Machine Check Exception Logging Daemon";
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        ExecStart = "${pkgs.mcelog}/bin/mcelog --daemon --foreground";
+        SuccessExitStatus = [ 0 15 ];
+
+        ProtectHome = true;
+        PrivateNetwork = true;
+        PrivateTmp = true;
+      };
+    };
+  };
+
+}

nixos/modules/module-list.nix

@@ -30,6 +30,7 @@
   ./hardware/cpu/amd-microcode.nix
   ./hardware/cpu/intel-microcode.nix
   ./hardware/ksm.nix
+  ./hardware/mcelog.nix
   ./hardware/network/b43.nix
   ./hardware/network/intel-2100bg.nix
   ./hardware/network/intel-2200bg.nix