Add parameter for swapfile offset

modules/core/boot.nix

@@ -22,6 +22,18 @@ in
       default = false;
       description = "Whether the device can hibernate. This creates a swapfile at /swapfile.";
     };
+
+    resumeDevice = mkOption {
+      type = types.str;
+      default = "/swapfile";
+      description = "The location of the hibernation resume swap file.";
+    };
+
+    resumeOffset = mkOption {
+      type = types.nullOr types.number;
+      default = null;
+      description = "The swap file offset. Can be found by running `filefrag -v $swap_file_location`. See https://wiki.archlinux.org/title/Power_management/Suspend_and_hibernate#Hibernation_into_swap_file";
+    };
   };
 
   config = {
@@ -38,7 +50,14 @@ in
         };
       };
 
-      resumeDevice = mkIf cfg.hibernation.enable "/swapfile";
+
+      resumeDevice = mkIf cfg.hibernation.enable cfg.hibernation.resumeDevice;
+      kernelParams = mkIf cfg.hibernation.enable [
+        "resume=${cfg.hibernation.resumeDevice}"
+      ] ++ (
+        if (cfg.hibernation.resumeOffset == null) then builtins.abort "config.pub-solar.hibernation.resumeOffset has to be set if config.pub-solar.hibernation.enable is true."
+        else [ "resume_offset=${cfg.hibernation.resumeOffset}" ]
+      );
 
       loader.systemd-boot.enable = true;
 

modules/sway/config/config.d/mode_system.conf.nix

@@ -4,7 +4,7 @@ set $mode_system (e)xit, (h)ibernate, (r)eboot, (Shift+s)hutdown
   bindsym $mod+0 mode "$mode_system"
   mode "$mode_system" {
       bindsym e exec swaymsg exit, mode "default"
-'' + (if !psCfg.core.allow-hibernation then ''
+'' + (if !psCfg.core.hibernation.enable then ''
   bindsym h exec systemctl hibernate, mode "default"
 '' else "")
 + (if !psCfg.paranoia.enable then ''