diff options
Diffstat (limited to 'nixpkgs/pkgs/os-specific/linux/kernel/manual-config.nix')
| -rw-r--r-- | nixpkgs/pkgs/os-specific/linux/kernel/manual-config.nix | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/os-specific/linux/kernel/manual-config.nix b/nixpkgs/pkgs/os-specific/linux/kernel/manual-config.nix new file mode 100644 index 000000000000..6adc3a33bb06 --- /dev/null +++ b/nixpkgs/pkgs/os-specific/linux/kernel/manual-config.nix @@ -0,0 +1,282 @@ +{ buildPackages, runCommand, nettools, bc, bison, flex, perl, rsync, gmp, libmpc, mpfr, openssl +, libelf +, utillinux +, writeTextFile +}: + +let + readConfig = configfile: import (runCommand "config.nix" {} '' + echo "{" > "$out" + while IFS='=' read key val; do + [ "x''${key#CONFIG_}" != "x$key" ] || continue + no_firstquote="''${val#\"}"; + echo ' "'"$key"'" = "'"''${no_firstquote%\"}"'";' >> "$out" + done < "${configfile}" + echo "}" >> $out + '').outPath; +in { + # Allow overriding stdenv on each buildLinux call + stdenv, + # The kernel version + version, + # The version of the kernel module directory + modDirVersion ? version, + # The kernel source (tarball, git checkout, etc.) + src, + # a list of { name=..., patch=..., extraConfig=...} patches + kernelPatches ? [], + # The kernel .config file + configfile, + # Manually specified nixexpr representing the config + # If unspecified, this will be autodetected from the .config + config ? stdenv.lib.optionalAttrs allowImportFromDerivation (readConfig configfile), + # Use defaultMeta // extraMeta + extraMeta ? {}, + # Whether to utilize the controversial import-from-derivation feature to parse the config + allowImportFromDerivation ? false, + # ignored + features ? null, +}: + +let + inherit (stdenv.lib) + hasAttr getAttr optional optionals optionalString optionalAttrs maintainers platforms; + + # Dependencies that are required to build kernel modules + moduleBuildDependencies = optional (stdenv.lib.versionAtLeast version "4.14") libelf; + + installkernel = writeTextFile { name = "installkernel"; executable=true; text = '' + #!${stdenv.shell} -e + mkdir -p $4 + cp -av $2 $4 + cp -av $3 $4 + ''; }; + + commonMakeFlags = [ + "O=$(buildRoot)" + ] ++ stdenv.lib.optionals (stdenv.hostPlatform.platform ? kernelMakeFlags) + stdenv.hostPlatform.platform.kernelMakeFlags; + + drvAttrs = config_: platform: kernelPatches: configfile: + let + config = let attrName = attr: "CONFIG_" + attr; in { + isSet = attr: hasAttr (attrName attr) config; + + getValue = attr: if config.isSet attr then getAttr (attrName attr) config else null; + + isYes = attr: (config.getValue attr) == "y"; + + isNo = attr: (config.getValue attr) == "n"; + + isModule = attr: (config.getValue attr) == "m"; + + isEnabled = attr: (config.isModule attr) || (config.isYes attr); + + isDisabled = attr: (!(config.isSet attr)) || (config.isNo attr); + } // config_; + + isModular = config.isYes "MODULES"; + + installsFirmware = (config.isEnabled "FW_LOADER") && + (isModular || (config.isDisabled "FIRMWARE_IN_KERNEL")) && + (stdenv.lib.versionOlder version "4.14"); + in (optionalAttrs isModular { outputs = [ "out" "dev" ]; }) // { + passthru = { + inherit version modDirVersion config kernelPatches configfile + moduleBuildDependencies stdenv; + }; + + inherit src; + + patches = map (p: p.patch) kernelPatches; + + prePatch = '' + for mf in $(find -name Makefile -o -name Makefile.include -o -name install.sh); do + echo "stripping FHS paths in \`$mf'..." + sed -i "$mf" -e 's|/usr/bin/||g ; s|/bin/||g ; s|/sbin/||g' + done + sed -i Makefile -e 's|= depmod|= ${buildPackages.kmod}/bin/depmod|' + sed -i scripts/ld-version.sh -e "s|/usr/bin/awk|${buildPackages.gawk}/bin/awk|" + ''; + + configurePhase = '' + runHook preConfigure + + mkdir build + export buildRoot="$(pwd)/build" + + echo "manual-config configurePhase buildRoot=$buildRoot pwd=$PWD" + + if [ -f "$buildRoot/.config" ]; then + echo "Could not link $buildRoot/.config : file exists" + exit 1 + fi + ln -sv ${configfile} $buildRoot/.config + + # reads the existing .config file and prompts the user for options in + # the current kernel source that are not found in the file. + make $makeFlags "''${makeFlagsArray[@]}" oldconfig + runHook postConfigure + + make $makeFlags "''${makeFlagsArray[@]}" prepare + actualModDirVersion="$(cat $buildRoot/include/config/kernel.release)" + if [ "$actualModDirVersion" != "${modDirVersion}" ]; then + echo "Error: modDirVersion ${modDirVersion} specified in the Nix expression is wrong, it should be: $actualModDirVersion" + exit 1 + fi + + # Note: we can get rid of this once http://permalink.gmane.org/gmane.linux.kbuild.devel/13800 is merged. + buildFlagsArray+=("KBUILD_BUILD_TIMESTAMP=$(date -u -d @$SOURCE_DATE_EPOCH)") + + cd $buildRoot + ''; + + buildFlags = [ + "KBUILD_BUILD_VERSION=1-NixOS" + platform.kernelTarget + "vmlinux" # for "perf" and things like that + ] ++ optional isModular "modules"; + + installFlags = [ + "INSTALLKERNEL=${installkernel}" + "INSTALL_PATH=$(out)" + ] ++ (optional isModular "INSTALL_MOD_PATH=$(out)") + ++ optional installsFirmware "INSTALL_FW_PATH=$(out)/lib/firmware"; + + # Some image types need special install targets (e.g. uImage is installed with make uinstall) + installTargets = [ ( + if platform ? kernelInstallTarget then platform.kernelInstallTarget + else if platform.kernelTarget == "uImage" then "uinstall" + else if platform.kernelTarget == "zImage" || platform.kernelTarget == "Image.gz" then "zinstall" + else "install" + ) ]; + + postInstall = (optionalString installsFirmware '' + mkdir -p $out/lib/firmware + '') + (if (platform ? kernelDTB && platform.kernelDTB) then '' + make $makeFlags "''${makeFlagsArray[@]}" dtbs dtbs_install INSTALL_DTBS_PATH=$out/dtbs + '' else "") + (if isModular then '' + mkdir -p $dev + cp vmlinux $dev/ + if [ -z "$dontStrip" ]; then + installFlagsArray+=("INSTALL_MOD_STRIP=1") + fi + make modules_install $makeFlags "''${makeFlagsArray[@]}" \ + $installFlags "''${installFlagsArray[@]}" + unlink $out/lib/modules/${modDirVersion}/build + unlink $out/lib/modules/${modDirVersion}/source + + mkdir -p $dev/lib/modules/${modDirVersion}/{build,source} + + # To save space, exclude a bunch of unneeded stuff when copying. + (cd .. && rsync --archive --prune-empty-dirs \ + --exclude='/build/' \ + --exclude='/Documentation/' \ + * $dev/lib/modules/${modDirVersion}/source/) + + cd $dev/lib/modules/${modDirVersion}/source + + cp $buildRoot/{.config,Module.symvers} $dev/lib/modules/${modDirVersion}/build + make modules_prepare $makeFlags "''${makeFlagsArray[@]}" O=$dev/lib/modules/${modDirVersion}/build + + # Keep some extra files on some arches (powerpc, aarch64) + for f in arch/powerpc/lib/crtsavres.o arch/arm64/kernel/ftrace-mod.o; do + if [ -f "$buildRoot/$f" ]; then + cp $buildRoot/$f $dev/lib/modules/${modDirVersion}/build/$f + fi + done + + # !!! No documentation on how much of the source tree must be kept + # If/when kernel builds fail due to missing files, you can add + # them here. Note that we may see packages requiring headers + # from drivers/ in the future; it adds 50M to keep all of its + # headers on 3.10 though. + + chmod u+w -R .. + arch=$(cd $dev/lib/modules/${modDirVersion}/build/arch; ls) + + # Remove unused arches + for d in $(cd arch/; ls); do + if [ "$d" = "$arch" ]; then continue; fi + if [ "$arch" = arm64 ] && [ "$d" = arm ]; then continue; fi + rm -rf arch/$d + done + + # Remove all driver-specific code (50M of which is headers) + rm -fR drivers + + # Keep all headers + find . -type f -name '*.h' -print0 | xargs -0 chmod u-w + + # Keep linker scripts (they are required for out-of-tree modules on aarch64) + find . -type f -name '*.lds' -print0 | xargs -0 chmod u-w + + # Keep root and arch-specific Makefiles + chmod u-w Makefile + chmod u-w arch/$arch/Makefile* + + # Keep whole scripts dir + chmod u-w -R scripts + + # Delete everything not kept + find . -type f -perm -u=w -print0 | xargs -0 rm + + # Delete empty directories + find -empty -type d -delete + + # Remove reference to kmod + sed -i Makefile -e 's|= ${buildPackages.kmod}/bin/depmod|= depmod|' + '' else optionalString installsFirmware '' + make firmware_install $makeFlags "''${makeFlagsArray[@]}" \ + $installFlags "''${installFlagsArray[@]}" + ''); + + requiredSystemFeatures = [ "big-parallel" ]; + + meta = { + description = + "The Linux kernel" + + (if kernelPatches == [] then "" else + " (with patches: " + + stdenv.lib.concatStringsSep ", " (map (x: x.name) kernelPatches) + + ")"); + license = stdenv.lib.licenses.gpl2; + homepage = https://www.kernel.org/; + repositories.git = https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git; + maintainers = [ + maintainers.thoughtpolice + ]; + platforms = platforms.linux; + timeout = 14400; # 4 hours + } // extraMeta; + }; +in + +assert stdenv.lib.versionAtLeast version "4.14" -> libelf != null; +assert stdenv.lib.versionAtLeast version "4.15" -> utillinux != null; +stdenv.mkDerivation ((drvAttrs config stdenv.hostPlatform.platform kernelPatches configfile) // { + name = "linux-${version}"; + + enableParallelBuilding = true; + + depsBuildBuild = [ buildPackages.stdenv.cc ]; + nativeBuildInputs = [ perl bc nettools openssl rsync gmp libmpc mpfr ] + ++ optional (stdenv.hostPlatform.platform.kernelTarget == "uImage") buildPackages.ubootTools + ++ optional (stdenv.lib.versionAtLeast version "4.14") libelf + ++ optional (stdenv.lib.versionAtLeast version "4.15") utillinux + ++ optionals (stdenv.lib.versionAtLeast version "4.16") [ bison flex ] + ; + + hardeningDisable = [ "bindnow" "format" "fortify" "stackprotector" "pic" "pie" ]; + + # Absolute paths for compilers avoid any PATH-clobbering issues. + makeFlags = commonMakeFlags ++ [ + "CC=${stdenv.cc}/bin/${stdenv.cc.targetPrefix}cc" + "HOSTCC=${buildPackages.stdenv.cc}/bin/${buildPackages.stdenv.cc.targetPrefix}cc" + "ARCH=${stdenv.hostPlatform.platform.kernelArch}" + ] ++ stdenv.lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) [ + "CROSS_COMPILE=${stdenv.cc.targetPrefix}" + ]; + + karch = stdenv.hostPlatform.platform.kernelArch; +}) |