feat: add possibility to add kernel patches

Signed-off-by: Fabian Wienand <fabian.wienand@9elements.com>

Author: RiSKeD

README.md

@@ -77,6 +77,12 @@ You can use this flake as a base for your own NixOS image or configuration.
           version = "6.6.7";
           sha256 = "...";
           extraKernelModules = [ "dummy" "loop" ];
+          kernelPatches = [
+            {
+              name = "my-custom-patch";
+              patch = ./path/to/my-patch.patch;
+            }
+          ];
         };
       };
     in {
@@ -124,6 +130,7 @@ You can override these options in your own configuration or flake:
 | `sha256`                  | `str`               | SRI hash   | SHA256 hash for the kernel tarball (must be in SRI format, e.g. `sha256-...`).              |
 | `extraKernelModules`      | `list of str`       | `[]`       | Extra kernel modules to load at boot (e.g. `["dummy"]`).                                    |
 | `includeIntelModules`     | `bool`              | `true`     | Include Intel-specific kernel modules (rapl, pmc, lpss).                                    |
+| `kernelPatches`           | `list of attrs`     | `[]`       | List of kernel patches to apply. Each patch should have `name` and `patch` attributes.      |
 
 ---
 

modules/kernel.nix

@@ -28,6 +28,18 @@ in
       default = true;
       description = "Intel-specific kernel modules (rapl, pmc, lpss).";
     };
+
+    kernelPatches = lib.mkOption {
+      type = lib.types.listOf lib.types.attrs;
+      default = [ ];
+      description = "List of kernel patches to apply. Each patch should have 'name' and 'patch' attributes.";
+      example = lib.literalExpression ''[
+        {
+          name = "my-patch";
+          patch = ./my-patch.patch;
+        }
+      ]'';
+    };
   };
 
   config = {
@@ -39,6 +51,7 @@ in
           url = "mirror://kernel/linux/kernel/v${lib.versions.major version}.x/linux-${version}.tar.xz";
           sha256 = cfg.sha256;
         };
+        kernelPatches = cfg.kernelPatches;
       };
     });