kernel: move source and build output to work-shared
commit 3b3f7e785e279 [kernel: Rearrange for 1.8] began the process of moving the kernel source and build artefacts out of sstate control and into a shared location. This changed triggered some workflow issues, as well as bugs related to the kernel source containing build output, and hence being dirty and breaking kernel rebuilds. To solve these issues, and to make it clear that the kernel is not under sstate control, we move the source and build outputs to: work-shared/MACHINE/kernel-source work-shared/MACHINE/kernel-build-artifacts Where kernel-build-artifacts is the kernel build output and kernel-source is kept "pristine". The build-artifacts contain everything that is required to build external modules against the kernel source, and includes the defconfig, the kernel-abiversion, System.map files and output from "make scripts". External module builds should either pass O= on the command line, or set KBUILD_OUTPUT to point to the build-artifacts. module-base.bbclass takes care of setting KBUILD_OUTPUT, so most existing external module recipes are transparently adapted to the new source/build layout. recipes that depend on the kernel source must have a depedency on the do_shared_workdir task: do_configure[depends] += "virtual/kernel:do_shared_workdir" With this dependency added, the STAGING_KERNEL_DIR will be populated and available to the rest of the build. (From OE-Core rev: 6a1ff0e7eacef595738f2fed086986fd622ec32a) Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Bruce Ashfield
Richard Purdie
parent
92725ad46f
commit
46cdaf1c7b
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@ -70,7 +70,7 @@ python split_kernel_module_packages () {
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m = kerverrexp.match(kernelver)
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if m:
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kernelver_stripped = m.group(1)
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staging_kernel_dir = d.getVar("STAGING_KERNEL_DIR", True)
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staging_kernel_dir = d.getVar("STAGING_KERNEL_BUILDDIR", True)
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system_map_file = "%s/boot/System.map-%s" % (dvar, kernelver)
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if not os.path.exists(system_map_file):
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system_map_file = "%s/System.map-%s" % (staging_kernel_dir, kernelver)
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@ -230,28 +230,33 @@ kernel_do_install() {
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[ -e Module.symvers ] && install -m 0644 Module.symvers ${D}/boot/Module.symvers-${KERNEL_VERSION}
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install -d ${D}${sysconfdir}/modules-load.d
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install -d ${D}${sysconfdir}/modprobe.d
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}
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do_install[prefuncs] += "package_get_auto_pr"
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#
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# Support for external module building - create a minimal copy of the
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# kernel source tree.
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#
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kerneldir=${D}${KERNEL_SRC_PATH}
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addtask shared_workdir after do_compile before do_install
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do_shared_workdir () {
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cd ${B}
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kerneldir=${STAGING_KERNEL_BUILDDIR}
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install -d $kerneldir
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mkdir -p ${D}/lib/modules/${KERNEL_VERSION}
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ln -sf ${KERNEL_SRC_PATH} "${D}/lib/modules/${KERNEL_VERSION}/build"
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#
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# Store the kernel version in sysroots for module-base.bbclass
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#
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echo "${KERNEL_VERSION}" > $kerneldir/kernel-abiversion
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# Copy files required for module builds
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cp System.map $kerneldir/System.map-${KERNEL_VERSION}
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cp Module.symvers $kerneldir/
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cp .config $kerneldir/
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mkdir -p $kerneldir/include/config
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cp include/config/kernel.release $kerneldir/include/config/kernel.release
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# We can also copy over all the generated files and avoid special cases
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# like version.h, but we've opted to keep this small until file creep starts
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# to happen
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if [ -e include/linux/version.h ]; then
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mkdir -p $kerneldir/include/linux
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cp include/linux/version.h $kerneldir/include/linux/version.h
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@ -273,10 +278,11 @@ kernel_do_install() {
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cp -fR arch/${ARCH}/include/generated/* $kerneldir/arch/${ARCH}/include/generated/
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fi
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}
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do_install[prefuncs] += "package_get_auto_pr"
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python sysroot_stage_all () {
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oe.path.copyhardlinktree(d.expand("${D}${KERNEL_SRC_PATH}"), d.expand("${SYSROOT_DESTDIR}${KERNEL_SRC_PATH}"))
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# We have an empty sysroot_stage_all to keep the default routine from
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# package.bbclass from expanding the kernel source into the sysroot and
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# colliding with linux-firmware files
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sysroot_stage_all () {
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}
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KERNEL_CONFIG_COMMAND ?= "oe_runmake_call -C ${S} O=${B} oldnoconfig || yes '' | oe_runmake -C ${S} O=${B} oldconfig"
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@ -467,7 +473,7 @@ kernel_do_deploy() {
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do_deploy[dirs] = "${DEPLOYDIR} ${B}"
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do_deploy[prefuncs] += "package_get_auto_pr"
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addtask deploy before do_build after do_install
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addtask deploy after do_populate_sysroot
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EXPORT_FUNCTIONS do_deploy
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@ -3,16 +3,24 @@ inherit kernel-arch
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export OS = "${TARGET_OS}"
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export CROSS_COMPILE = "${TARGET_PREFIX}"
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export KERNEL_VERSION = "${@base_read_file('${STAGING_KERNEL_DIR}/kernel-abiversion')}"
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# This points to the build artefacts from the main kernel build
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# such as .config and System.map
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# Confusingly it is not the module build output (which is ${B}) but
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# we didn't pick the name.
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export KBUILD_OUTPUT = "${STAGING_KERNEL_BUILDDIR}"
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export KERNEL_VERSION = "${@base_read_file('${STAGING_KERNEL_BUILDDIR}/kernel-abiversion')}"
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KERNEL_OBJECT_SUFFIX = ".ko"
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# kernel modules are generally machine specific
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PACKAGE_ARCH = "${MACHINE_ARCH}"
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do_configure[depends] += "virtual/kernel:do_shared_workdir"
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# Function to ensure the kernel scripts are created. Expected to
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# be called before do_compile. See module.bbclass for an exmaple.
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do_make_scripts() {
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unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS
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make CC="${KERNEL_CC}" LD="${KERNEL_LD}" AR="${KERNEL_AR}" \
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-C ${STAGING_KERNEL_DIR} scripts
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-C ${STAGING_KERNEL_DIR} O=${STAGING_KERNEL_BUILDDIR} scripts
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}
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@ -14,6 +14,7 @@ module_do_compile() {
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KERNEL_VERSION=${KERNEL_VERSION} \
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CC="${KERNEL_CC}" LD="${KERNEL_LD}" \
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AR="${KERNEL_AR}" \
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O=${STAGING_KERNEL_BUILDDIR} \
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${MAKE_TARGETS}
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}
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@ -21,6 +22,7 @@ module_do_install() {
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unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS
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oe_runmake DEPMOD=echo INSTALL_MOD_PATH="${D}" \
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CC="${KERNEL_CC}" LD="${KERNEL_LD}" \
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O=${STAGING_KERNEL_BUILDDIR} \
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modules_install
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}
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@ -395,7 +395,8 @@ SDKPATHNATIVE = "${SDKPATH}/sysroots/${SDK_SYS}"
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##################################################################
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OLDEST_KERNEL = "2.6.32"
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STAGING_KERNEL_DIR = "${STAGING_DIR_HOST}/usr/src/kernel"
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STAGING_KERNEL_DIR = "${TMPDIR}/work-shared/${MACHINE}/kernel-source"
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STAGING_KERNEL_BUILDDIR = "${TMPDIR}/work-shared/${MACHINE}/kernel-build-artifacts"
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##################################################################
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# Specific image creation and rootfs population info.
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@ -15,7 +15,7 @@ inherit module-base
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# We need the kernel to be staged (unpacked, patched and configured) before
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# we can grab the source and make the kernel-devsrc package
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do_install[depends] += "virtual/kernel:do_populate_sysroot"
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do_install[depends] += "virtual/kernel:do_shared_workdir"
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# Need the source, not just the output of populate_sysroot
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do_install[depends] += "virtual/kernel:do_configure"
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@ -30,7 +30,8 @@ do_populate_sysroot[noexec] = "1"
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# Define where the kernel headers are installed on the target as well as where
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# they are staged.
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KERNEL_SRC_PATH = "/usr/src/kernel"
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S = "${STAGING_DIR_TARGET}/${KERNEL_SRC_PATH}"
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S = "${STAGING_KERNEL_DIR}"
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B = "${STAGING_KERNEL_BUILDDIR}"
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KERNEL_VERSION = "${@get_kernelversion_headers('${S}')}"
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@ -45,8 +46,15 @@ do_install() {
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# We can keep this copy simple and take everything, since a we'll clean up any build
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# artifacts afterwards, and the extra i/o is not significant
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#
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cd ${B}
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find . -type d -name '.git*' -prune -o -type f -print0 | cpio --null -pdlu $kerneldir
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cd ${S}
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find . -type d -name '.git*' -prune -o -type f -print0 | cpio --null -pdlu $kerneldir
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# Explicitly set KBUILD_OUTPUT to ensure that the image directory is cleaned and not
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# The main build artifacts. We clean the directory to avoid QA errors on mismatched
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# architecture (since scripts and helpers are native format).
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KBUILD_OUTPUT="$kerneldir"
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oe_runmake -C $kerneldir CC="${KERNEL_CC}" LD="${KERNEL_LD}" clean _mrproper_scripts
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# As of Linux kernel version 3.0.1, the clean target removes
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@ -54,7 +62,7 @@ do_install() {
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# KBUILD_LDFLAGS_MODULE, making it required to build external modules.
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if [ ${ARCH} = "powerpc" ]; then
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mkdir -p $kerneldir/arch/powerpc/lib/
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cp ${S}/arch/powerpc/lib/crtsavres.o $kerneldir/arch/powerpc/lib/crtsavres.o
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cp ${B}/arch/powerpc/lib/crtsavres.o $kerneldir/arch/powerpc/lib/crtsavres.o
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fi
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}
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# Ensure we don't race against "make scripts" during cpio
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@ -7,7 +7,7 @@ LIC_FILES_CHKSUM = "file://LICENSE;md5=1412caf5a1aa90d6a48588a4794c0eac \
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file://lgpl-2.1.txt;md5=243b725d71bb5df4a1e5920b344b86ad"
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DEPENDS = "virtual/kernel"
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do_configure[depends] += "virtual/kernel:do_install"
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do_configure[depends] += "virtual/kernel:do_shared_workdir"
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inherit module
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@ -32,7 +32,7 @@ DEPENDS = " \
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bison flex \
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"
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do_configure[depends] += "virtual/kernel:do_install"
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do_configure[depends] += "virtual/kernel:do_shared_workdir"
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PROVIDES = "virtual/perf"
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