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The "-kbuildtarget" and "-native" multiarch bitbake targets are useable to run additional target or host specific builds for kbuild scripts and tools. Using the "-kbuildtarget" bitbake target enables the build of a target specific kbuild package at cross builds. So using "linux-kbuild" provides the package for the target platform. Using the "-native" bitbake target enables the build of a host specific kbuild package at cross builds. When cross building using "linux-kbuild-native" provides the package for the host platform. Only the "host" specific package is built automatically at cross builds. This solves this from doc/custom_kernel.inc: - The kernel headers package has not supported both native and cross compilation of kernel modules when itself was cross built - Future roadmap: Generate kernel headers package for both host and target when using a cross build Signed-off-by: Stefan Koch --- .../linux/classes/kbuildtarget.bbclass | 8 +++ .../linux/files/debian/control.tmpl | 6 ++- .../linux/files/debian/isar/build.tmpl | 13 ++++- .../linux/files/debian/isar/common.tmpl | 9 ++++ .../linux/files/debian/isar/install.tmpl | 34 +++++++----- meta/recipes-kernel/linux/linux-custom.inc | 52 +++++++++++++++++-- 6 files changed, 101 insertions(+), 21 deletions(-) create mode 100644 meta/recipes-kernel/linux/classes/kbuildtarget.bbclass diff --git a/meta/recipes-kernel/linux/classes/kbuildtarget.bbclass b/meta/recipes-kernel/linux/classes/kbuildtarget.bbclass new file mode 100644 index 00000000..26369861 --- /dev/null +++ b/meta/recipes-kernel/linux/classes/kbuildtarget.bbclass @@ -0,0 +1,8 @@ +python kbuildtarget_virtclass_handler() { + pn = e.data.getVar('PN') + if pn.endswith('-kbuildtarget'): + e.data.setVar('BPN', pn[:-len('-kbuildtarget')]) + e.data.appendVar('OVERRIDES', ':class-kbuildtarget') +} +addhandler kbuildtarget_virtclass_handler +kbuildtarget_virtclass_handler[eventmask] = "bb.event.RecipePreFinalise" diff --git a/meta/recipes-kernel/linux/files/debian/control.tmpl b/meta/recipes-kernel/linux/files/debian/control.tmpl index 7f271367..6f8f8afe 100644 --- a/meta/recipes-kernel/linux/files/debian/control.tmpl +++ b/meta/recipes-kernel/linux/files/debian/control.tmpl @@ -6,6 +6,7 @@ Build-Depends: bc, kmod, cpio, ${KBUILD_DEPENDS} Homepage: http://www.kernel.org/ Package: linux-image-${KERNEL_NAME_PROVIDED} +Build-Profiles: Architecture: any Depends: ${KERNEL_DEBIAN_DEPENDS} Description: ${KERNEL_NAME_PROVIDED} Linux kernel, version @KR@ @@ -13,6 +14,7 @@ Description: ${KERNEL_NAME_PROVIDED} Linux kernel, version @KR@ files, version: @KR@. Package: linux-headers-${KERNEL_NAME_PROVIDED} +Build-Profiles: Architecture: any Depends: ${KERNEL_HEADERS_DEBIAN_DEPENDS}, ${perl:Depends}, ${shlib:Depends} Description: ${KERNEL_NAME_PROVIDED} Linux kernel headers for @KR@ @@ -21,7 +23,7 @@ Description: ${KERNEL_NAME_PROVIDED} Linux kernel headers for @KR@ This is useful for people who need to build external modules Package: linux-libc-dev -Build-Profiles: +Build-Profiles: Section: devel Provides: linux-kernel-headers Architecture: any @@ -41,6 +43,7 @@ Description: Linux Kernel Headers for development (for cross-compiling) your kernel. Use linux-headers-* packages for that. Package: linux-image-${KERNEL_NAME_PROVIDED}-dbg +Build-Profiles: Section: debug Architecture: any Description: Linux kernel debugging symbols for @KR@ @@ -48,6 +51,7 @@ Description: Linux kernel debugging symbols for @KR@ all the necessary debug symbols for the kernel and its modules. Package: linux-kbuild-${KERNEL_NAME_PROVIDED} +Build-Profiles: Architecture: any Depends: ${perl:Depends}, ${shlib:Depends} Description: ${KERNEL_NAME_PROVIDED} Linux kbuild scripts and tools for @KR@ diff --git a/meta/recipes-kernel/linux/files/debian/isar/build.tmpl b/meta/recipes-kernel/linux/files/debian/isar/build.tmpl index 906dc580..81a6ba8a 100644 --- a/meta/recipes-kernel/linux/files/debian/isar/build.tmpl +++ b/meta/recipes-kernel/linux/files/debian/isar/build.tmpl @@ -21,8 +21,17 @@ do_build() { KR=$(${MAKE} O=${KERNEL_BUILD_DIR} -s --no-print-directory kernelrelease) sed -i "s/@KR@/${KR}/g" ${S}/debian/control ${S}/debian/linux-image-${KERNEL_NAME_PROVIDED}.* - # Build the Linux kernel - ${MAKE} O=${KERNEL_BUILD_DIR} ${PARALLEL_MAKE} KCFLAGS="${KCFLAGS}" KAFLAGS="${KAFLAGS}" + if echo "${DEB_BUILD_PROFILES}" | grep -q "kernel"; then # Build kernel scripts and tools + ${MAKE} O=${KERNEL_BUILD_DIR} ${PARALLEL_MAKE} KCFLAGS="${KCFLAGS}" KAFLAGS="${KAFLAGS}" + elif echo "${DEB_BUILD_PROFILES}" | grep -q "kbuild"; then # Build kernel scripts and tools + ${MAKE} O=${KERNEL_BUILD_DIR} ${PARALLEL_MAKE} KCFLAGS="${KCFLAGS}" KAFLAGS="${KAFLAGS}" scripts + if grep -q -E "CONFIG_STACK_VALIDATION=y|CONFIG_HAVE_OBJTOOL=y" ${KERNEL_BUILD_DIR}/.config && [ -d "tools/objtool" ]; then + ${MAKE} O=${KERNEL_BUILD_DIR} ${PARALLEL_MAKE} KCFLAGS="${KCFLAGS}" KAFLAGS="${KAFLAGS}" tools/objtool || true + fi + if grep -q "CONFIG_MODULES=y" ${KERNEL_BUILD_DIR}/.config; then + ${MAKE} O=${KERNEL_BUILD_DIR} ${PARALLEL_MAKE} KCFLAGS="${KCFLAGS}" KAFLAGS="${KAFLAGS}" modules_prepare + fi + fi # Stop tracing set +x diff --git a/meta/recipes-kernel/linux/files/debian/isar/common.tmpl b/meta/recipes-kernel/linux/files/debian/isar/common.tmpl index 0944e943..e3a1d8a0 100644 --- a/meta/recipes-kernel/linux/files/debian/isar/common.tmpl +++ b/meta/recipes-kernel/linux/files/debian/isar/common.tmpl @@ -12,6 +12,15 @@ KERNEL_PKG_LIBC_HEADERS=linux-libc-dev KERNEL_PKG_LIBC_HEADERS_CROSS=linux-libc-dev-${DISTRO_ARCH}-cross KERNEL_PKG_KERN_KBUILD=linux-kbuild-${KERNEL_NAME_PROVIDED} +# Force creating debian package with valid host arch for -native build +# Use a cross build to comply with arch specific kernel defconfigs +# The scripts and tools are always created for host arch +if echo "${DEB_BUILD_PROFILES}" | grep -q -e "cross" -e "kbuild" +then + eval $(dpkg-architecture -f -A ${DISTRO_ARCH}) + CROSS_COMPILE=${DEB_TARGET_GNU_TYPE}- +fi + # Constants KCONF=.config diff --git a/meta/recipes-kernel/linux/files/debian/isar/install.tmpl b/meta/recipes-kernel/linux/files/debian/isar/install.tmpl index 97780dcc..77856aee 100644 --- a/meta/recipes-kernel/linux/files/debian/isar/install.tmpl +++ b/meta/recipes-kernel/linux/files/debian/isar/install.tmpl @@ -33,20 +33,28 @@ do_install() { # Trace what we do here set -x - # Run the install steps - install_image - if [ "${ARCH}" != "um" ]; then - install_config - install_map + if echo "${DEB_BUILD_PROFILES}" | grep -q "kbuild"; then + # Install kernel scripts and tools + install_kbuild ${deb_kern_kbuild_dir} + fi + + if echo "${DEB_BUILD_PROFILES}" | grep -q "kernel"; then + if echo "${DEB_BUILD_PROFILES}" | grep -q "cross"; then + # Install cross kernel scripts and tools + install_kbuild ${deb_kern_kbuild_dir}-${HOST_ARCH}-cross + fi + + # Run the install steps + install_image + if [ "${ARCH}" != "um" ]; then + install_config + install_map + fi + install_hooks + install_dtbs + install_kmods + install_headers fi - install_hooks - install_dtbs - install_kmods - install_headers - - # Cleanup and install kernel scripts and tools - rm -rf ${deb_kern_kbuild_dir} - install_kbuild ${deb_kern_kbuild_dir} # Stop tracing set +x diff --git a/meta/recipes-kernel/linux/linux-custom.inc b/meta/recipes-kernel/linux/linux-custom.inc index 48d86c2a..3f71fd7e 100644 --- a/meta/recipes-kernel/linux/linux-custom.inc +++ b/meta/recipes-kernel/linux/linux-custom.inc @@ -84,30 +84,72 @@ TEMPLATE_VARS += " \ DISTRIBUTOR \ " -inherit dpkg -inherit template - # Add custom cflags to the kernel build KCFLAGS ?= "-fdebug-prefix-map=${CURDIR}=." KAFLAGS ?= "-fdebug-prefix-map=${CURDIR}=." # Derive name of the kernel packages from the name of this recipe -KERNEL_NAME_PROVIDED ?= "${@ d.getVar('PN').partition('linux-')[2]}" +KERNEL_NAME_PROVIDED ?= "${@ d.getVar('BPN').partition('linux-')[2]}" + +python() { + if d.getVar("DISTRO_ARCH") != d.getVar("HOST_ARCH") and d.getVar("ISAR_CROSS_COMPILE", True) == "1" and "class-native" not in d.getVar("OVERRIDES", True): + d.appendVar("OVERRIDES", ":cross-profile") +} + +# default profiles and provides +BUILD_PROFILES = "kernel kbuild" + +# we only offer the -kbuildtarget variant when actually cross compiling +BBCLASSEXTEND:append:cross-profile = " kbuildtarget" + +# when cross-profile is active +# build only kernel with the default variant of the recipe +BUILD_PROFILES:cross-profile = "kernel" + +# select correct kbuild package for isar cross-build +HEADERS_DEPENDS:cross-profile = ", linux-kbuild-${KERNEL_NAME_PROVIDED}:${HOST_ARCH} | linux-kbuild-${KERNEL_NAME_PROVIDED}" + +# -native: kbuild package for host +BUILD_PROFILES:class-native = "kbuild" +RECIPE_PROVIDES:class-native = "linux-kbuild-${KERNEL_NAME_PROVIDED}-native" + +# -kbuildtarget: kbuild package for target, enforcing non-cross-build +BUILD_PROFILES:class-kbuildtarget = "kbuild" +RECIPE_PROVIDES:class-kbuildtarget = "linux-kbuild-${KERNEL_NAME_PROVIDED}" +ISAR_CROSS_COMPILE:class-kbuildtarget = "0" # Make bitbake know we will be producing linux-image and linux-headers packages # Also make it know about other packages from control -PROVIDES += " \ +RECIPE_PROVIDES = " \ linux-image-${KERNEL_NAME_PROVIDED} \ linux-headers-${KERNEL_NAME_PROVIDED} \ linux-libc-dev \ linux-libc-dev-${DISTRO_ARCH}-cross \ linux-image-${KERNEL_NAME_PROVIDED}-dbg \ + linux-kbuild-${KERNEL_NAME_PROVIDED} \ " +# when cross-profile is active +# kbuild package is provided by -native or -kbuildtarget variant +# otherwise it's provided by the default variant +RECIPE_PROVIDES:remove:cross-profile = "linux-kbuild-${KERNEL_NAME_PROVIDED}" # append headers depends HEADERS_DEPENDS = ", linux-kbuild-${KERNEL_NAME_PROVIDED}" KERNEL_HEADERS_DEBIAN_DEPENDS:append = "${HEADERS_DEPENDS}" +# append provides +PROVIDES += "${RECIPE_PROVIDES}" + +# append build profiles +DEB_BUILD_PROFILES += "${BUILD_PROFILES}" + +# add dependency to build -kbuildtarget and -native automatically +RDEPENDS:append:cross-profile = " ${BPN}-native" + +inherit dpkg +inherit template +inherit kbuildtarget + def get_kernel_arch(d): distro_arch = d.getVar("DISTRO_ARCH") if distro_arch in ["amd64", "i386"]: