nixpkgs/pkgs/os-specific/linux/kernel/generic.nix
Nikolay Amiantov c0e77dba0e linux: add kernelPreferBuiltin platform option
This allows to use kernelAutoModules but still compile in any options that are set so in template config.
It's helpful for ARM and maybe other platforms where defaul configurations are useful because they compile in
modules that we and udev cannot autodetect now.
2017-04-09 22:46:07 +03:00

137 lines
4.1 KiB
Nix

{ stdenv, perl, buildLinux
, # The kernel source tarball.
src
, # The kernel version.
version
, # Overrides to the kernel config.
extraConfig ? ""
, # 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 ? {}
, # 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.platform.name != "pc"
, extraMeta ? {}
, ...
}:
assert stdenv.platform.name == "sheevaplug" -> stdenv.platform.uboot != null;
assert stdenv.isLinux;
let
lib = stdenv.lib;
kernelConfigFun = baseConfig:
let
configFromPatches =
map ({extraConfig ? "", ...}: extraConfig) kernelPatches;
in lib.concatStringsSep "\n" ([baseConfig] ++ configFromPatches);
configfile = stdenv.mkDerivation {
inherit ignoreConfigErrors;
name = "linux-config-${version}";
generateConfig = ./generate-config.pl;
kernelConfig = kernelConfigFun config;
nativeBuildInputs = [ perl ];
platformName = stdenv.platform.name;
kernelBaseConfig = stdenv.platform.kernelBaseConfig;
kernelTarget = stdenv.platform.kernelTarget;
autoModules = stdenv.platform.kernelAutoModules;
preferBuiltin = stdenv.platform.kernelPreferBuiltin or false;
arch = stdenv.platform.kernelArch;
crossAttrs = let
cp = stdenv.cross.platform;
in {
arch = cp.kernelArch;
platformName = cp.name;
kernelBaseConfig = cp.kernelBaseConfig;
kernelTarget = cp.kernelTarget;
autoModules = cp.kernelAutoModules;
# Just ignore all options that don't apply (We are lazy).
ignoreConfigErrors = true;
kernelConfig = kernelConfigFun configCross;
inherit (kernel.crossDrv) src patches preUnpack;
};
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
'';
inherit (kernel) src patches preUnpack;
buildPhase = ''
cd $buildRoot
# Get a basic config file for later refinement with $generateConfig.
make -C ../$sourceRoot O=$PWD $kernelBaseConfig ARCH=$arch
# Create the config file.
echo "generating kernel configuration..."
echo "$kernelConfig" > kernel-config
DEBUG=1 ARCH=$arch KERNEL_CONFIG=kernel-config AUTO_MODULES=$autoModules \
PREFER_BUILTIN=$preferBuiltin SRC=../$sourceRoot perl -w $generateConfig
'';
installPhase = "mv .config $out";
enableParallelBuilding = true;
};
kernel = buildLinux {
inherit version modDirVersion src kernelPatches;
configfile = configfile.nativeDrv or configfile;
crossConfigfile = configfile.crossDrv or configfile;
config = { CONFIG_MODULES = "y"; CONFIG_FW_LOADER = "m"; };
crossConfig = { CONFIG_MODULES = "y"; CONFIG_FW_LOADER = "m"; };
};
passthru = {
# Combine the `features' attribute sets of all the kernel patches.
features = lib.fold (x: y: (x.features or {}) // y) features kernelPatches;
meta = kernel.meta // extraMeta;
passthru = kernel.passthru // (removeAttrs passthru [ "passthru" "meta" ]);
};
configWithPlatform = kernelPlatform: import ./common-config.nix
{ inherit stdenv version kernelPlatform extraConfig;
features = passthru.features; # Ensure we know of all extra patches, etc.
};
config = configWithPlatform stdenv.platform;
configCross = configWithPlatform stdenv.cross.platform;
nativeDrv = lib.addPassthru kernel.nativeDrv passthru;
crossDrv = lib.addPassthru kernel.crossDrv passthru;
in if kernel ? crossDrv then nativeDrv // { inherit nativeDrv crossDrv; } else lib.addPassthru kernel passthru