blob: 59f07823cc7fc39df812b5a71a7b67a2cdc03c19 [file] [log] [blame]
# Copyright 2020 The Chromium OS Authors. All rights reserved.
# Distributed under the terms of the GNU General Public License v2
# Any changes submitted in the current ebuild needs to be duplicated in
# `9999` ebuild as well.
EAPI=6
CROS_WORKON_REPO="https://cos.googlesource.com"
CROS_WORKON_PROJECT="third_party/kernel"
CROS_WORKON_EGIT_BRANCH="cos-5.4"
CROS_WORKON_COMMIT="6ed806a8324a1559294019ed496f2c7c0dc01974"
CROS_WORKON_LOCALNAME="kernel/v5.4"
CROS_WORKON_BLACKLIST="1"
CHROMEOS_KERNEL_CONFIG="${FILESDIR}/base.config"
# This must be inherited *after* EGIT/CROS_WORKON variables defined
inherit cros-workon cros-kernel2 osreleased
STRIP_MASK+=" /usr/src/${P}/build/vmlinux"
STRIP_MASK+=" *.ko"
DESCRIPTION="COS Linux Kernel 5.4"
HOMEPAGE="https://cloud.google.com/container-optimized-os"
KEYWORDS="*"
IUSE="module_sign lockdown gpu"
src_configure() {
if use module_sign ; then
# Provide a custom key configuration file, because otherwise the kernel
# would auto-generate one.
mkdir -p "$(cros-workon_get_build_dir)/certs"
cp -f "${FILESDIR}/x509.genkey" \
"$(cros-workon_get_build_dir)/certs/x509.genkey" || die
# Different board use different root key.
if use gpu ; then
# The root key belongs to lakitu-gpu board.
cp -f "${FILESDIR}/lakitu_gpu_root_cert.pem" \
"$(cros-workon_get_build_dir)/certs/trusted_key.pem" || die
else
# The root key belongs to lakitu board.
cp -f "${FILESDIR}/lakitu_root_cert.pem" \
"$(cros-workon_get_build_dir)/certs/trusted_key.pem" || die
fi
fi
cros-kernel2_src_configure
}
# Change for EAPI=6
src_prepare() {
default
cros-kernel2_src_prepare
}
tar_kernel_source() {
# Put kernel source tarball under /opt to avoid it gets
# masked by INSTALL_MASK.
local source_dir=opt/google/src
dodir "${source_dir}"
pushd "${D}/usr/src/${P}" || die
tar --exclude="./build" -czf "${D}/${source_dir}/kernel-src.tar.gz" .
popd || die
}
tar_kernel_headers() {
einfo "Packaging kernel headers"
# We do pretty much exactly what scripts/package/builddeb does.
pushd "${D}/usr/src/${P}" || die
(
find . -name Makefile\* -o -name Kconfig\* -o -name \*.pl
find arch/*/include include scripts -type f -o -type l
find "arch/$(tc-arch-kernel)" -name module.lds -o -name Kbuild.platforms -o -name Platform
find "arch/$(tc-arch-kernel)" -name include -o -name scripts -type d | while IFS='' read -r line; do
find "${line}" -type f
done
) > "${T}/hdrsrcfiles"
popd || die
pushd "$(cros-workon_get_build_dir)" || die
{
if cros_chkconfig_present STACK_VALIDATION; then
find tools/objtool -type f -executable
fi
find "arch/$(tc-arch-kernel)/include" Module.symvers include scripts -type f
if cros_chkconfig_present GCC_PLUGINS; then
find scripts/gcc-plugins -name \*.so -o -name gcc-common.h
fi
} > "${T}/hdrobjfiles"
popd || die
local destdir="${T}/headers_tmp/usr/src/linux-headers-$(kernelrelease)"
mkdir -p "${destdir}"
tar -c -f - -C "${D}/usr/src/${P}" -T "${T}/hdrsrcfiles" | tar -xf - -C "${destdir}"
tar -c -f - -C "$(cros-workon_get_build_dir)" -T "${T}/hdrobjfiles" | tar -xf - -C "${destdir}"
rm "${T}/hdrsrcfiles" "${T}/hdrobjfiles"
cp "$(cros-workon_get_build_dir)/.config" "${destdir}/.config"
# We don't configure INSTALL_MASK to remove files in /opt, so export the
# headers tarball through /opt.
local source_dir=opt/google/src
dodir "${source_dir}"
pushd "${T}/headers_tmp" || die
tar -czf "${D}/${source_dir}/kernel-headers.tgz" .
popd || die
rm -r "${T}/headers_tmp"
}
write_toolchain_env() {
# Write the compiler info used for kernel compilation
# in toolchain_env.
local toolchain_env_dir=etc
# Example for toolchain_env content:
# CC=x86_64-cros-linux-gnu-clang
# CXX=x86_64-cros-linux-gnu-clang++
# The file will be deleted after copying data to BUILD_DIR artifact
echo "CC=${CC}" > "${D}/${toolchain_env_dir}/toolchain_env"
echo "CXX=${CXX}" >> "${D}/${toolchain_env_dir}/toolchain_env"
}
write_kernel_info() {
# Write kernel information used for building kernel.
local kernel_info_dir=etc
# Example for kernel_info content:
# URL=https://chromium.googlesource.com/chromiumos/third_party/kernel
echo "URL=${CROS_WORKON_REPO}/${CROS_WORKON_PROJECT}" > "${D}/${kernel_info_dir}/kernel_info"
}
get_kernel_commit_id() {
# Provide kernel commit id
# VCSID variable is unconditionally set by the cros-workon eclass, and
# is in the form of "<ebuild_revision>-<sha1>".
echo "${VCSID##*-}"
}
write_kernel_commit() {
# Write kernel commit information used for building kernel.
local kernel_commit_dir=etc
# Example for kernel_commit content:
# c7ad6ff415b5a1e87f8333e2a63c7209e6efc1b2
get_kernel_commit_id > "${D}/${kernel_commit_dir}/kernel_commit"
}
src_install() {
cros-kernel2_src_install
do_osrelease_field "KERNEL_COMMIT_ID" "$(get_kernel_commit_id)"
# Install kernel source and headers tarballs so they can be exported as
# artifacts later.
tar_kernel_source
tar_kernel_headers
# Install kernel compiler information
write_toolchain_env
# Install kernel source information
write_kernel_info
# Install kernel commit information
write_kernel_commit
}