init cachy kernel

2025-12-10 09:30:35 -06:00
parent 764ce12aea
commit a5eba8ec68
24 changed files with 58361 additions and 2 deletions
--- a/packages/linux-cachyos/default.nix
+++ b/packages/linux-cachyos/default.nix
@@ -0,0 +1,178 @@
+{
+  stdenv,
+  pkgs,
+  lib,
+  callPackage,
+  zfs_2_3,
+  ...
+}@inputs:
+
+let
+  inherit (stdenv) isx86_64 isLinux;
+  inherit (lib.trivial) importJSON;
+
+  # CachyOS repeating stuff.
+  mainVersions = importJSON ./versions.json;
+  ltsVersions = importJSON ./versions-lts.json;
+  rcVersions = importJSON ./versions-rc.json;
+  hardenedVersions = importJSON ./versions-hardened.json;
+
+  ltoKernelAttrs = {
+    taste = "linux-cachyos";
+    configPath = ./config-nix/cachyos-lto.x86_64-linux.nix;
+
+    inherit (import ./lib/llvm-pkgs.nix inputs) callPackage;
+    useLTO = "thin";
+
+    packagesExtend = import ./lib/llvm-module-overlay.nix inputs;
+
+    zfsOverride = {
+      inherit (pkgs)
+        autoreconfHook269
+        util-linux
+        coreutils
+        perl
+        udevCheckHook
+        zlib
+        libuuid
+        python3
+        attr
+        openssl
+        libtirpc
+        nfs-utils
+        gawk
+        gnugrep
+        gnused
+        systemd
+        smartmontools
+        sysstat
+        pkg-config
+        curl
+        pam
+        nix-update-script
+        ;
+    };
+
+    description = "Linux EEVDF-BORE scheduler Kernel by CachyOS built with LLVM and Thin LTO";
+  };
+
+  # Evaluation hack
+  brokenReplacement = pkgs.hello.overrideAttrs (prevAttrs: {
+    meta = prevAttrs.meta // {
+      platform = [ ];
+      broken = true;
+    };
+  });
+
+  isUnsupported = !isx86_64 || !isLinux;
+
+  mkCachyKernel =
+    if isUnsupported then
+      # Evaluation hack
+      _attrs: {
+        kernel = brokenReplacement;
+        recurseForDerivations = false;
+      }
+    else
+      {
+        callPackage ? inputs.callPackage,
+        ...
+      }@attrs:
+      callPackage ./packages-for.nix (
+        {
+          versions = mainVersions;
+          inherit inputs;
+          cachyOverride = newAttrs: mkCachyKernel (attrs // newAttrs);
+        }
+        // attrs
+      );
+
+  gccKernel = mkCachyKernel {
+    taste = "linux-cachyos";
+    configPath = ./config-nix/cachyos-gcc.x86_64-linux.nix;
+    # since all flavors use the same versions.json, we just need the updateScript in one of them
+    withUpdateScript = "stable";
+  };
+in
+{
+  inherit
+    mainVersions
+    rcVersions
+    hardenedVersions
+    mkCachyKernel
+    ;
+
+  cachyos-gcc = gccKernel;
+
+  cachyos-lts = mkCachyKernel {
+    taste = "linux-cachyos-lts";
+    configPath = ./config-nix/cachyos-lts.x86_64-linux.nix;
+
+    versions = ltsVersions;
+    withUpdateScript = "lts";
+
+    # Prevent building kernel modules for LTS kernel
+    packagesExtend =
+      _kernel: _final: prev:
+      prev // { recurseForDerivations = false; };
+  };
+
+  cachyos-rc = mkCachyKernel {
+    taste = "linux-cachyos-rc";
+    configPath = ./config-nix/cachyos-rc.x86_64-linux.nix;
+
+    versions = rcVersions;
+    withUpdateScript = "rc";
+
+    # Prevent building kernel modules for rc kernel
+    packagesExtend =
+      _kernel: _final: prev:
+      prev // { recurseForDerivations = false; };
+  };
+  cachyos-lto = mkCachyKernel ltoKernelAttrs;
+
+  cachyos-lto-znver4 = mkCachyKernel (
+    ltoKernelAttrs
+    // {
+      configPath = ./config-nix/cachyos-znver4.x86_64-linux.nix;
+    }
+  );
+
+  cachyos-sched-ext = throw "\"sched-ext\" patches were merged with \"cachyos\" flavor.";
+
+  cachyos-server = mkCachyKernel {
+    taste = "linux-cachyos-server";
+    configPath = ./config-nix/cachyos-server.x86_64-linux.nix;
+    basicCachy = false;
+    cpuSched = "eevdf";
+    ticksHz = 300;
+    tickRate = "idle";
+    preempt = "server";
+    hugePages = "madvise";
+    withDAMON = true;
+    withNTSync = false;
+    withHDR = false;
+    description = "Linux EEVDF scheduler Kernel by CachyOS targeted for Servers";
+  };
+
+  cachyos-hardened = mkCachyKernel {
+    taste = "linux-cachyos-hardened";
+    configPath = ./config-nix/cachyos-hardened.x86_64-linux.nix;
+    cpuSched = "hardened";
+
+    versions = hardenedVersions;
+    withUpdateScript = "hardened";
+
+    withNTSync = false;
+    withHDR = false;
+  };
+
+  zfs = zfs_2_3.overrideAttrs (prevAttrs: {
+    src = if isUnsupported then brokenReplacement else gccKernel.zfs_cachyos.src;
+    patches = [ ];
+    passthru = prevAttrs.passthru // {
+      kernelModuleAttribute = "zfs_cachyos";
+    };
+    postPatch = builtins.replaceStrings [ "grep --quiet '^Linux-M" ] [ "# " ] prevAttrs.postPatch;
+  });
+}