Merge pull request #187252 from K900/kernel-sanity
linux: assorted build cleanups
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K900
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commit
175f140b8b
@ -56,23 +56,6 @@ let
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};
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};
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# this requires kernel package
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dtbsWithSymbols = pkgs.stdenv.mkDerivation {
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name = "dtbs-with-symbols";
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inherit (cfg.kernelPackage) src nativeBuildInputs depsBuildBuild;
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patches = map (patch: patch.patch) cfg.kernelPackage.kernelPatches;
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buildPhase = ''
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patchShebangs scripts/*
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substituteInPlace scripts/Makefile.lib \
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--replace 'DTC_FLAGS += $(DTC_FLAGS_$(basetarget))' 'DTC_FLAGS += $(DTC_FLAGS_$(basetarget)) -@'
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make ${pkgs.stdenv.hostPlatform.linux-kernel.baseConfig} ARCH="${pkgs.stdenv.hostPlatform.linuxArch}"
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make dtbs ARCH="${pkgs.stdenv.hostPlatform.linuxArch}"
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'';
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installPhase = ''
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make dtbs_install INSTALL_DTBS_PATH=$out/dtbs ARCH="${pkgs.stdenv.hostPlatform.linuxArch}"
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'';
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};
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filterDTBs = src: if isNull cfg.filter
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then "${src}/dtbs"
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else
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@ -83,6 +66,8 @@ let
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| xargs -0 cp -v --no-preserve=mode --target-directory $out --parents
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'';
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filteredDTBs = filterDTBs cfg.kernelPackage;
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# Compile single Device Tree overlay source
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# file (.dts) into its compiled variant (.dtbo)
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compileDTS = name: f: pkgs.callPackage({ stdenv, dtc }: stdenv.mkDerivation {
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@ -197,7 +182,7 @@ in
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};
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hardware.deviceTree.package = if (cfg.overlays != [])
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then pkgs.deviceTree.applyOverlays (filterDTBs dtbsWithSymbols) (withDTBOs cfg.overlays)
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else (filterDTBs cfg.kernelPackage);
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then pkgs.deviceTree.applyOverlays filteredDTBs (withDTBOs cfg.overlays)
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else filteredDTBs;
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};
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}
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@ -59,14 +59,6 @@ let
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++ optional (lib.versionAtLeast version "4.14") libelf
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++ optional (lib.versionAtLeast version "5.13") zstd;
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installkernel = buildPackages.writeShellScript "installkernel" ''
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set -e
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mkdir -p $4
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cp -av $2 $4
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cp -av $3 $4
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'';
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drvAttrs = config_: kernelConf: kernelPatches: configfile:
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let
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config = let attrName = attr: "CONFIG_" + attr; in {
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@ -114,10 +106,6 @@ let
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++ optional (lib.versionAtLeast version "5.2" && lib.versionOlder version "5.4") ./gen-kheaders-metadata.patch;
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prePatch = ''
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for mf in $(find -name Makefile -o -name Makefile.include -o -name install.sh); do
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echo "stripping FHS paths in \`$mf'..."
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sed -i "$mf" -e 's|/usr/bin/||g ; s|/bin/||g ; s|/sbin/||g'
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done
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sed -i Makefile -e 's|= depmod|= ${buildPackages.kmod}/bin/depmod|'
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# Don't include a (random) NT_GNU_BUILD_ID, to make the build more deterministic.
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@ -146,6 +134,11 @@ let
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fi
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patchShebangs scripts
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# also patch arch-specific install scripts
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for i in $(find arch -name install.sh); do
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patchShebangs "$i"
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done
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'';
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configurePhase = ''
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@ -185,18 +178,69 @@ let
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kernelConf.target
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"vmlinux" # for "perf" and things like that
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] ++ optional isModular "modules"
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++ optional buildDTBs "dtbs"
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++ optionals buildDTBs ["dtbs" "DTC_FLAGS=-@"]
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++ extraMakeFlags;
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installFlags = [
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"INSTALLKERNEL=${installkernel}"
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"INSTALL_PATH=$(out)"
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] ++ (optional isModular "INSTALL_MOD_PATH=$(out)")
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++ optional installsFirmware "INSTALL_FW_PATH=$(out)/lib/firmware"
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++ optionals buildDTBs ["dtbs_install" "INSTALL_DTBS_PATH=$(out)/dtbs"];
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preInstall = ''
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preInstall = let
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# All we really need to do here is copy the final image and System.map to $out,
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# and use the kernel's modules_install, firmware_install, dtbs_install, etc. targets
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# for the rest. Easy, right?
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#
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# Unfortunately for us, the obvious way of getting the built image path,
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# make -s image_name, does not work correctly, because some architectures
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# (*cough* aarch64 *cough*) change KBUILD_IMAGE on the fly in their install targets,
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# so we end up attempting to install the thing we didn't actually build.
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#
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# Thankfully, there's a way out that doesn't involve just hardcoding everything.
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#
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# The kernel has an install target, which runs a pretty simple shell script
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# (located at scripts/install.sh or arch/$arch/boot/install.sh, depending on
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# which kernel version you're looking at) that tries to do something sensible.
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#
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# (it would be great to hijack this script immediately, as it has all the
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# information we need passed to it and we don't need it to try and be smart,
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# but unfortunately, the exact location of the scripts differs between kernel
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# versions, and they're seemingly not considered to be public API at all)
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#
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# One of the ways it tries to discover what "something sensible" actually is
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# is by delegating to what's supposed to be a user-provided install script
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# located at ~/bin/installkernel.
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#
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# (the other options are:
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# - a distribution-specific script at /sbin/installkernel,
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# which we can't really create in the sandbox easily
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# - an architecture-specific script at arch/$arch/boot/install.sh,
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# which attempts to guess _something_ and usually guesses very wrong)
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#
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# More specifically, the install script exec's into ~/bin/installkernel, if one
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# exists, with the following arguments:
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#
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# $1: $KERNELRELEASE - full kernel version string
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# $2: $KBUILD_IMAGE - the final image path
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# $3: System.map - path to System.map file, seemingly hardcoded everywhere
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# $4: $INSTALL_PATH - path to the destination directory as specified in installFlags
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#
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# $2 is exactly what we want, so hijack the script and use the knowledge given to it
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# by the makefile overlords for our own nefarious ends.
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#
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# Note that the makefiles specifically look in ~/bin/installkernel, and
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# writeShellScriptBin writes the script to <store path>/bin/installkernel,
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# so HOME needs to be set to just the store path.
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#
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# FIXME: figure out a less roundabout way of doing this.
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installkernel = buildPackages.writeShellScriptBin "installkernel" ''
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cp -av $2 $4
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cp -av $3 $4
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'';
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in ''
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installFlagsArray+=("-j$NIX_BUILD_CORES")
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export HOME=${installkernel}
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'';
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# Some image types need special install targets (e.g. uImage is installed with make uinstall)
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