cachyos kernel

system/common.nix

@@ -94,10 +94,11 @@
     };
   };
 
+  # cachyos kernel overlay
+  nixpkgs.overlays = [ inputs.nix-cachyos-kernel.overlays.default ];
+
   # kernel options
   boot = {
-    kernelPackages = pkgs.linuxPackages_testing;
-    # kernelPackages = pkgs.linuxPackages_latest;
 
     # aes_generic is built-in as of linux 7.0, no longer a loadable module
     initrd.luks.cryptoModules = lib.mkForce (

system/system-mreow.nix

@@ -14,6 +14,17 @@
     inputs.nixos-hardware.nixosModules.framework-amd-ai-300-series
   ];
 
+  # cachyos kernel: bore scheduler, full lto, zen 4 (amd ai 340)
+  boot.kernelPackages =
+    let
+      helpers = pkgs.callPackage "${inputs.nix-cachyos-kernel}/helpers.nix" { };
+      kernel = pkgs.cachyosKernels.linux-cachyos-bore-lto.override {
+        lto = "full";
+        processorOpt = "zen4";
+      };
+    in
+    helpers.kernelModuleLLVMOverride (pkgs.linuxKernel.packagesFor kernel);
+
   hardware.framework.laptop13.audioEnhancement.rawDeviceName =
     lib.mkDefault "alsa_output.pci-0000_c1_00.6.analog-stereo";
 

system/system-yarn.nix

@@ -18,6 +18,22 @@
     inputs.jovian-nixos.nixosModules.default
   ];
 
+  # cachyos kernel: bore scheduler, full lto, zen 3 (5800x)
+  boot.kernelPackages =
+    let
+      helpers = pkgs.callPackage "${inputs.nix-cachyos-kernel}/helpers.nix" { };
+      kernel = pkgs.cachyosKernels.linux-cachyos-bore-lto.override {
+        lto = "full";
+        processorOpt = "x86_64-v3";
+        structuredExtraConfig = with lib.kernel; {
+          # x86_64-v3 is the ISA level; pin to zen 3 for microarch tuning
+          GENERIC_CPU = lib.mkForce no;
+          MZEN3 = lib.mkForce yes;
+        };
+      };
+    in
+    helpers.kernelModuleLLVMOverride (pkgs.linuxKernel.packagesFor kernel);
+
   fileSystems."/media/games" = {
     device = "/dev/disk/by-uuid/1878136e-765d-4784-b204-3536ab4fdac8";
     fsType = "f2fs";