242 lines
8.3 KiB
Nix
242 lines
8.3 KiB
Nix
{ buildPackages
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, callPackage
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, perl
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, bison ? null
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, flex ? null
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, gmp ? null
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, libmpc ? null
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, mpfr ? null
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, pahole
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, lib
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, stdenv
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, rustc
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, rustPlatform
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, rust-bindgen
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, # The kernel source tarball.
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src
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, # The kernel version.
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version
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, # Allows overriding the default defconfig
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defconfig ? null
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, # Legacy overrides to the intermediate kernel config, as string
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extraConfig ? ""
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# Additional make flags passed to kbuild
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, extraMakeFlags ? []
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, # enables the options in ./common-config.nix; if `false` then only
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# `structuredExtraConfig` is used
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enableCommonConfig ? true
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, # kernel intermediate config overrides, as a set
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structuredExtraConfig ? {}
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, # The version number used for the module directory
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# If unspecified, this is determined automatically from the version.
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modDirVersion ? null
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, # An attribute set whose attributes express the availability of
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# certain features in this kernel. E.g. `{ia32Emulation = true;}'
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# indicates a kernel that provides Intel wireless support. Used in
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# NixOS to implement kernel-specific behaviour.
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features ? {}
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, # Custom seed used for CONFIG_GCC_PLUGIN_RANDSTRUCT if enabled. This is
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# automatically extended with extra per-version and per-config values.
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randstructSeed ? ""
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, # A list of patches to apply to the kernel. Each element of this list
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# should be an attribute set {name, patch} where `name' is a
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# symbolic name and `patch' is the actual patch. The patch may
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# optionally be compressed with gzip or bzip2.
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kernelPatches ? []
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, ignoreConfigErrors ? stdenv.hostPlatform.linux-kernel.name != "pc"
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, extraMeta ? {}
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, isZen ? false
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, isLibre ? false
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, isHardened ? false
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# easy overrides to stdenv.hostPlatform.linux-kernel members
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, autoModules ? stdenv.hostPlatform.linux-kernel.autoModules
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, preferBuiltin ? stdenv.hostPlatform.linux-kernel.preferBuiltin or false
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, kernelArch ? stdenv.hostPlatform.linuxArch
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, kernelTests ? []
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, nixosTests
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, ...
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}@args:
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# Note: this package is used for bootstrapping fetchurl, and thus
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# cannot use fetchpatch! All mutable patches (generated by GitHub or
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# cgit) that are needed here should be included directly in Nixpkgs as
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# files.
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assert stdenv.isLinux;
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let
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# Dirty hack to make sure that `version` & `src` have
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# `<nixpkgs/pkgs/os-specific/linux/kernel/linux-x.y.nix>` as position
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# when using `builtins.unsafeGetAttrPos`.
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#
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# This is to make sure that ofborg actually detects changes in the kernel derivation
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# and pings all maintainers.
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#
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# For further context, see https://github.com/NixOS/nixpkgs/pull/143113#issuecomment-953319957
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basicArgs = builtins.removeAttrs
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args
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(lib.filter (x: ! (builtins.elem x [ "version" "src" ])) (lib.attrNames args));
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# Combine the `features' attribute sets of all the kernel patches.
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kernelFeatures = lib.foldr (x: y: (x.features or {}) // y) ({
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efiBootStub = true;
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netfilterRPFilter = true;
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ia32Emulation = true;
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} // features) kernelPatches;
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commonStructuredConfig = import ./common-config.nix {
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inherit lib stdenv version;
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features = kernelFeatures; # Ensure we know of all extra patches, etc.
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};
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intermediateNixConfig = configfile.moduleStructuredConfig.intermediateNixConfig
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# extra config in legacy string format
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+ extraConfig
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+ stdenv.hostPlatform.linux-kernel.extraConfig or "";
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structuredConfigFromPatches =
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map ({extraStructuredConfig ? {}, ...}: {settings=extraStructuredConfig;}) kernelPatches;
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# appends kernel patches extraConfig
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kernelConfigFun = baseConfigStr:
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let
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configFromPatches =
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map ({extraConfig ? "", ...}: extraConfig) kernelPatches;
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in lib.concatStringsSep "\n" ([baseConfigStr] ++ configFromPatches);
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withRust = ((configfile.moduleStructuredConfig.settings.RUST or {}).tristate or null) == "y";
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configfile = stdenv.mkDerivation {
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inherit ignoreConfigErrors autoModules preferBuiltin kernelArch extraMakeFlags;
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pname = "linux-config";
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inherit version;
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generateConfig = ./generate-config.pl;
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kernelConfig = kernelConfigFun intermediateNixConfig;
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passAsFile = [ "kernelConfig" ];
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depsBuildBuild = [ buildPackages.stdenv.cc ];
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nativeBuildInputs = [ perl gmp libmpc mpfr ]
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++ lib.optionals (lib.versionAtLeast version "4.16") [ bison flex ]
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++ lib.optional (lib.versionAtLeast version "5.2") pahole
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++ lib.optionals withRust [ rust-bindgen rustc ]
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;
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RUST_LIB_SRC = lib.optionalString withRust rustPlatform.rustLibSrc;
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platformName = stdenv.hostPlatform.linux-kernel.name;
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# e.g. "defconfig"
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kernelBaseConfig = if defconfig != null then defconfig else stdenv.hostPlatform.linux-kernel.baseConfig;
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makeFlags = lib.optionals (stdenv.hostPlatform.linux-kernel ? makeFlags) stdenv.hostPlatform.linux-kernel.makeFlags
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++ extraMakeFlags;
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postPatch = kernel.postPatch + ''
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# Patch kconfig to print "###" after every question so that
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# generate-config.pl from the generic builder can answer them.
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sed -e '/fflush(stdout);/i\printf("###");' -i scripts/kconfig/conf.c
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'';
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preUnpack = kernel.preUnpack or "";
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inherit (kernel) src patches;
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buildPhase = ''
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export buildRoot="''${buildRoot:-build}"
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export HOSTCC=$CC_FOR_BUILD
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export HOSTCXX=$CXX_FOR_BUILD
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export HOSTAR=$AR_FOR_BUILD
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export HOSTLD=$LD_FOR_BUILD
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# Get a basic config file for later refinement with $generateConfig.
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make $makeFlags \
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-C . O="$buildRoot" $kernelBaseConfig \
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ARCH=$kernelArch \
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HOSTCC=$HOSTCC HOSTCXX=$HOSTCXX HOSTAR=$HOSTAR HOSTLD=$HOSTLD \
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CC=$CC OBJCOPY=$OBJCOPY OBJDUMP=$OBJDUMP READELF=$READELF \
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$makeFlags
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# Create the config file.
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echo "generating kernel configuration..."
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ln -s "$kernelConfigPath" "$buildRoot/kernel-config"
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DEBUG=1 ARCH=$kernelArch KERNEL_CONFIG="$buildRoot/kernel-config" AUTO_MODULES=$autoModules \
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PREFER_BUILTIN=$preferBuiltin BUILD_ROOT="$buildRoot" SRC=. MAKE_FLAGS="$makeFlags" \
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perl -w $generateConfig
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'';
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installPhase = "mv $buildRoot/.config $out";
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enableParallelBuilding = true;
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passthru = rec {
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module = import ../../../../nixos/modules/system/boot/kernel_config.nix;
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# used also in apache
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# { modules = [ { options = res.options; config = svc.config or svc; } ];
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# check = false;
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# The result is a set of two attributes
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moduleStructuredConfig = (lib.evalModules {
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modules = [
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module
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] ++ lib.optionals enableCommonConfig [
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{ settings = commonStructuredConfig; _file = "pkgs/os-specific/linux/kernel/common-config.nix"; }
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] ++ [
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{ settings = structuredExtraConfig; _file = "structuredExtraConfig"; }
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]
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++ structuredConfigFromPatches
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;
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}).config;
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structuredConfig = moduleStructuredConfig.settings;
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};
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}; # end of configfile derivation
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kernel = (callPackage ./manual-config.nix { inherit lib stdenv buildPackages; }) (basicArgs // {
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inherit kernelPatches randstructSeed extraMakeFlags extraMeta configfile;
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pos = builtins.unsafeGetAttrPos "version" args;
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config = { CONFIG_MODULES = "y"; CONFIG_FW_LOADER = "m"; } // lib.optionalAttrs withRust { CONFIG_RUST = "y"; };
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} // lib.optionalAttrs (modDirVersion != null) { inherit modDirVersion; });
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in
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kernel.overrideAttrs (finalAttrs: previousAttrs: {
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passthru = previousAttrs.passthru or { } // basicArgs // {
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features = kernelFeatures;
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inherit commonStructuredConfig structuredExtraConfig extraMakeFlags isZen isHardened isLibre;
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isXen = lib.warn "The isXen attribute is deprecated. All Nixpkgs kernels that support it now have Xen enabled." true;
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# Adds dependencies needed to edit the config:
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# nix-shell '<nixpkgs>' -A linux.configEnv --command 'make nconfig'
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configEnv = kernel.overrideAttrs (old: {
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nativeBuildInputs = old.nativeBuildInputs or [] ++ (with buildPackages; [
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pkg-config ncurses
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]);
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});
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tests = let
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overridableKernel = finalAttrs.finalPackage // {
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override = args:
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lib.warn (
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"override is stubbed for NixOS kernel tests, not applying changes these arguments: "
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+ toString (lib.attrNames (lib.toFunction args { }))
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) overridableKernel;
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};
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in [ (nixosTests.kernel-generic.passthru.testsForKernel overridableKernel) ] ++ kernelTests;
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};
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})
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