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{ buildPackages
, callPackage
, perl
, bison ? null
, flex ? null
, gmp ? null
, libmpc ? null
, mpfr ? null
, stdenv
, # The kernel source tarball.
src
, # The kernel version.
version
, # Allows overriding the default defconfig
defconfig ? null
, # Legacy overrides to the intermediate kernel config, as string
extraConfig ? ""
, # kernel intermediate config overrides, as a set
structuredExtraConfig ? {}
, # The version number used for the module directory
modDirVersion ? version
, # An attribute set whose attributes express the availability of
# certain features in this kernel. E.g. `{iwlwifi = true;}'
# indicates a kernel that provides Intel wireless support. Used in
# NixOS to implement kernel-specific behaviour.
features ? {}
, # Custom seed used for CONFIG_GCC_PLUGIN_RANDSTRUCT if enabled. This is
# automatically extended with extra per-version and per-config values.
randstructSeed ? ""
, # A list of patches to apply to the kernel. Each element of this list
# should be an attribute set {name, patch} where `name' is a
# symbolic name and `patch' is the actual patch. The patch may
# optionally be compressed with gzip or bzip2.
kernelPatches ? []
, ignoreConfigErrors ? stdenv.hostPlatform.platform.name != "pc" ||
stdenv.hostPlatform != stdenv.buildPlatform
, extraMeta ? {}
# easy overrides to stdenv.hostPlatform.platform members
, autoModules ? stdenv.hostPlatform.platform.kernelAutoModules
, preferBuiltin ? stdenv.hostPlatform.platform.kernelPreferBuiltin or false
, kernelArch ? stdenv.hostPlatform.platform.kernelArch
, ...
}:
assert stdenv.isLinux;
let
lib = stdenv.lib;
# Combine the `features' attribute sets of all the kernel patches.
kernelFeatures = lib.fold (x: y: (x.features or {}) // y) ({
iwlwifi = true;
efiBootStub = true;
needsCifsUtils = true;
netfilterRPFilter = true;
grsecurity = false;
xen_dom0 = false;
ia32Emulation = true;
} // features) kernelPatches;
commonStructuredConfig = import ./common-config.nix {
inherit stdenv version ;
features = kernelFeatures; # Ensure we know of all extra patches, etc.
};
intermediateNixConfig = configfile.moduleStructuredConfig.intermediateNixConfig
# extra config in legacy string format
+ extraConfig
+ lib.optionalString (stdenv.hostPlatform.platform ? kernelExtraConfig) stdenv.hostPlatform.platform.kernelExtraConfig;
structuredConfigFromPatches =
map ({extraStructuredConfig ? {}, ...}: {settings=extraStructuredConfig;}) kernelPatches;
# appends kernel patches extraConfig
kernelConfigFun = baseConfigStr:
let
configFromPatches =
map ({extraConfig ? "", ...}: extraConfig) kernelPatches;
in lib.concatStringsSep "\n" ([baseConfigStr] ++ configFromPatches);
configfile = stdenv.mkDerivation {
inherit ignoreConfigErrors autoModules preferBuiltin kernelArch;
pname = "linux-config";
inherit version;
generateConfig = ./generate-config.pl;
kernelConfig = kernelConfigFun intermediateNixConfig;
passAsFile = [ "kernelConfig" ];
depsBuildBuild = [ buildPackages.stdenv.cc ];
nativeBuildInputs = [ perl gmp libmpc mpfr ]
++ lib.optionals (stdenv.lib.versionAtLeast version "4.16") [ bison flex ];
platformName = stdenv.hostPlatform.platform.name;
# e.g. "defconfig"
kernelBaseConfig = if defconfig != null then defconfig else stdenv.hostPlatform.platform.kernelBaseConfig;
# e.g. "bzImage"
kernelTarget = stdenv.hostPlatform.platform.kernelTarget;
prePatch = kernel.prePatch + ''
# Patch kconfig to print "###" after every question so that
# generate-config.pl from the generic builder can answer them.
sed -e '/fflush(stdout);/i\printf("###");' -i scripts/kconfig/conf.c
'';
preUnpack = kernel.preUnpack or "";
inherit (kernel) src patches;
buildPhase = ''
export buildRoot="''${buildRoot:-build}"
# Get a basic config file for later refinement with $generateConfig.
make -C . O="$buildRoot" $kernelBaseConfig \
ARCH=$kernelArch \
HOSTCC=${buildPackages.stdenv.cc.targetPrefix}gcc \
HOSTCXX=${buildPackages.stdenv.cc.targetPrefix}g++
# Create the config file.
echo "generating kernel configuration..."
ln -s "$kernelConfigPath" "$buildRoot/kernel-config"
DEBUG=1 ARCH=$kernelArch KERNEL_CONFIG="$buildRoot/kernel-config" AUTO_MODULES=$autoModules \
PREFER_BUILTIN=$preferBuiltin BUILD_ROOT="$buildRoot" SRC=. perl -w $generateConfig
'';
installPhase = "mv $buildRoot/.config $out";
enableParallelBuilding = true;
passthru = rec {
module = import ../../../../nixos/modules/system/boot/kernel_config.nix;
# used also in apache
# { modules = [ { options = res.options; config = svc.config or svc; } ];
# check = false;
# The result is a set of two attributes
moduleStructuredConfig = (lib.evalModules {
modules = [
module
{ settings = commonStructuredConfig; _file = "pkgs/os-specific/linux/kernel/common-config.nix"; }
{ settings = structuredExtraConfig; _file = "structuredExtraConfig"; }
]
++ structuredConfigFromPatches
;
}).config;
#
structuredConfig = moduleStructuredConfig.settings;
};
}; # end of configfile derivation
kernel = (callPackage ./manual-config.nix {}) {
inherit version modDirVersion src kernelPatches randstructSeed stdenv extraMeta configfile;
config = { CONFIG_MODULES = "y"; CONFIG_FW_LOADER = "m"; };
};
passthru = {
features = kernelFeatures;
inherit commonStructuredConfig;
passthru = kernel.passthru // (removeAttrs passthru [ "passthru" ]);
};
in lib.extendDerivation true passthru kernel
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