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/packages-for.nix
+++ b/packages/linux-cachyos/packages-for.nix
@@ -0,0 +1,190 @@
+{
+  stdenv,
+  taste,
+  configPath,
+  versions,
+  callPackage,
+  linuxPackages,
+  linuxPackagesFor,
+  fetchFromGitHub,
+  lib,
+  buildPackages,
+  ogKernelConfigfile ? linuxPackages.kernel.passthru.configfile,
+  withUpdateScript ? null,
+  packagesExtend ? null,
+  cachyOverride,
+  extraMakeFlags ? [ ],
+  zfsOverride ? { },
+  # those are set in their PKGBUILDs
+  basicCachy ? true,
+  mArch ? null,
+  cpuSched ? "cachyos",
+  useLTO ? "none",
+  ticksHz ? 500,
+  tickRate ? "full",
+  preempt ? "full",
+  hugePages ? "always",
+  withDAMON ? false,
+  withNTSync ? true,
+  withHDR ? true,
+  withoutDebug ? false,
+  description ? "Linux EEVDF-BORE scheduler Kernel by CachyOS with other patches and improvements",
+  # For flakes
+  inputs,
+}:
+
+let
+  # For revs
+  shorter = builtins.substring 0 7;
+
+  # Helps when overriding.
+  dropUpdateScript = prevAttrs: { passthru = removeAttrs prevAttrs.passthru [ "updateScript" ]; };
+
+  # Helps when batch-overriding.
+  dropAttrsUpdateScript = builtins.mapAttrs (
+    _k: v: if (v.passthru.updateScript or null) != null then v.overrideAttrs dropUpdateScript else v
+  );
+
+  # Helps when batch-overriding.
+  setAttrsPlatforms =
+    platforms:
+    builtins.mapAttrs (
+      _k: v:
+      if (v ? "overrideAttrs") then
+        v.overrideAttrs (prevAttrs: {
+          meta = (prevAttrs.meta or { }) // {
+            platforms = lib.lists.intersectLists (prevAttrs.meta.platforms or [ ]) platforms;
+            platformsOrig = prevAttrs.meta.platforms or [ ];
+            badPlatforms = [ ];
+          };
+        })
+      else
+        v
+    );
+
+  cachyConfig = {
+    inherit
+      taste
+      versions
+      basicCachy
+      mArch
+      cpuSched
+      useLTO
+      ticksHz
+      tickRate
+      preempt
+      hugePages
+      withDAMON
+      withNTSync
+      withHDR
+      withoutDebug
+      description
+      withUpdateScript
+      ;
+  };
+
+  # The three phases of the config
+  # - First we apply the changes fromt their PKGBUILD using kconfig;
+  # - Then we NIXify it (in the update-script);
+  # - Last state is importing the NIXified version for building.
+  preparedConfigfile = callPackage ./prepare.nix {
+    inherit
+      cachyConfig
+      stdenv
+      kernel
+      ogKernelConfigfile
+      commonMakeFlags
+      ;
+  };
+  kconfigToNix = callPackage ./lib/kconfig-to-nix.nix {
+    configfile = preparedConfigfile;
+  };
+  linuxConfigTransfomed = import configPath;
+
+  kernel = callPackage ./kernel.nix {
+    inherit cachyConfig stdenv kconfigToNix;
+    kernelPatches = [ ];
+    configfile = preparedConfigfile;
+    config = linuxConfigTransfomed;
+    # For tests
+    inherit (inputs) flakes final;
+    kernelPackages = packagesWithRightPlatforms;
+  };
+
+  commonMakeFlags = import "${inputs.nixpkgs}/pkgs/os-specific/linux/kernel/common-flags.nix" {
+    inherit
+      lib
+      stdenv
+      buildPackages
+      extraMakeFlags
+      ;
+  };
+
+  # CachyOS repeating stuff.
+  addOurs = finalAttrs: prevAttrs: {
+    kernel_configfile = prevAttrs.kernel.configfile;
+    zfs_cachyos =
+      (finalAttrs.callPackage "${inputs.nixpkgs}/pkgs/os-specific/linux/zfs/generic.nix"
+        zfsOverride
+        {
+          kernelModuleAttribute = "zfs_cachyos";
+          kernelMinSupportedMajorMinor = "1.0";
+          kernelMaxSupportedMajorMinor = "99.99";
+          enableUnsupportedExperimentalKernel = true;
+          inherit (prevAttrs.zfs_2_3) version;
+          tests = { };
+          maintainers = with lib.maintainers; [
+            pedrohlc
+          ];
+          hash = "";
+          extraPatches = [ ];
+        }
+      ).overrideAttrs
+        (prevAttrs: {
+          src = fetchFromGitHub {
+            owner = "cachyos";
+            repo = "zfs";
+            inherit (versions.zfs) rev hash;
+          };
+          postPatch = builtins.replaceStrings [ "grep --quiet '^Linux-M" ] [ "# " ] prevAttrs.postPatch;
+        });
+    inherit cachyOverride;
+  };
+
+  basePackages = linuxPackagesFor kernel;
+  packagesWithOurs = basePackages.extend addOurs;
+  packagesWithExtend =
+    if packagesExtend == null then
+      packagesWithOurs
+    else
+      packagesWithOurs.extend (packagesExtend kernel);
+  packagesWithRemovals = removeAttrs packagesWithExtend [
+    "zfs"
+    "zfs_2_1"
+    "zfs_2_2"
+    "zfs_2_3"
+    "zfs_unstable"
+    "lkrg"
+    "drbd"
+    # these kernelPackages.* are now pkgs.*
+    "system76-power"
+    "system76-scheduler"
+    "perf"
+  ];
+  packagesWithoutUpdateScript = dropAttrsUpdateScript packagesWithRemovals;
+  packagesWithRightPlatforms = setAttrsPlatforms supportedPlatforms packagesWithoutUpdateScript;
+
+  supportedPlatforms = [
+    (with lib.systems.inspect.patterns; isx86_64 // isLinux)
+    (with lib.systems.inspect.patterns; isx86 // isLinux)
+    "x86_64-linux"
+  ];
+
+  versionSuffix = "+C${shorter versions.config.rev}+P${shorter versions.patches.rev}";
+in
+packagesWithRightPlatforms
+// {
+  _description = "Kernel and modules for ${description}";
+  _version = "${versions.linux.version}${versionSuffix}";
+  inherit (basePackages) kernel; # This one still has the updateScript
+}