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authorHaris Okanovic <haris.okanovic@ni.com>2017-11-07 12:40:39 -0600
committerRichard Purdie <richard.purdie@linuxfoundation.org>2018-01-02 17:24:37 +0000
commit5b4aab6b40cf21471442e21abc8051b38985de84 (patch)
tree5ef7f35eed15902da0356765f068d57af99f5c23 /meta/recipes-kernel/linux/linux-yocto-rt_4.4.bb
parent2362b78887a63e2e7e5afe1c1cc539c4a6be959d (diff)
downloadpoky-5b4aab6b40cf21471442e21abc8051b38985de84.tar.gz
kernel: Add support for multiple kernel packages
Some distros may want to provide alternate kernel "flavors" via feeds or within bootable images. For example, readily available builds which provide certain diagnostic features can enable developers and testers to more quickly resolve issues by avoiding lengthy kernel builds. This change allows for building multiple flavors of the kernel and module packages by templatizing kernel package names via a new KERNEL_PACKAGE_NAME variable in kernel.bbclass. It defaults to the old name of "kernel", but can be overridden by certain recipes providing alternate kernel flavors. To maintain compatibility, recipes providing alternate kernel flavors cannot be the "preferred provider" for virtual/kernel. This is because OE puts the preferred provider's build and source at "tmp-glibc/work-shared/$MACHINE/kernel-build-artifacts/" and "tmp-glibc/work-shared/$MACHINE/kernel-source/" instead of "tmp-glibc/work/*/$PN/" like other recipes. Therefore, recipes using the default KERNEL_PACKAGE_NAME="kernel" follows the old semantics -- build in the old location and may be preferred provider -- while recipes using all other KERNEL_PACKAGE_NAME's build from the normal WORKDIR and don't provide "virtual/kernel". Testing: 1. Add `KERNEL_PACKAGE_NAME_pn-linux-yocto-tiny = "tiny-linux"` to local.conf so that linux-yocto-tiny may build alongside the main kernel (linux-yocto). 2. `bitbake linux-yocto linux-yocto-tiny` to build both kernel flavors. 3. Verified image and modules IPKs exist for both: tmp-glibc/deploy/ipk/qemux86/kernel-* for linux-yocto tmp-glibc/deploy/ipk/qemux86/tiny-linux* for linux-yocto-tiny 4. Verified linux-yocto is the "preferred provider", and was built in shared directory: tmp-glibc/work-shared/qemux86/kernel-* 5. Add `CORE_IMAGE_BASE_INSTALL_append_pn-core-image-base = "tiny-linux"` to local.conf to install both kernel flavors in core-image-base. 6. `bitbake core-image-base` to build an image. 7. Verified image contains two bzImage's under /boot/, with "yocto-standard" (linux-yocto recipe) selected to boot via symlink. Discussion threads: http://lists.openembedded.org/pipermail/openembedded-core/2015-December/thread.html#114122 http://lists.openembedded.org/pipermail/openembedded-core/2017-July/thread.html#139130 [YOCTO #11363] (From OE-Core rev: 6c8c899849d101fd1b86aad0b8eed05c7c785924) Signed-off-by: Ioan-Adrian Ratiu <adrian.ratiu@ni.com> Signed-off-by: Gratian Crisan <gratian.crisan@ni.com> Signed-off-by: Haris Okanovic <haris.okanovic@ni.com> Coauthored-by: Gratian Crisan <gratian.crisan@ni.com> Coauthored-by: Haris Okanovic <haris.okanovic@ni.com> Coauthored-by: Josh Hernstrom <josh.hernstrom@ni.com> Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/recipes-kernel/linux/linux-yocto-rt_4.4.bb')
-rw-r--r--meta/recipes-kernel/linux/linux-yocto-rt_4.4.bb2
1 files changed, 1 insertions, 1 deletions
diff --git a/meta/recipes-kernel/linux/linux-yocto-rt_4.4.bb b/meta/recipes-kernel/linux/linux-yocto-rt_4.4.bb
index c1cbf35a25..e1547e9960 100644
--- a/meta/recipes-kernel/linux/linux-yocto-rt_4.4.bb
+++ b/meta/recipes-kernel/linux/linux-yocto-rt_4.4.bb
@@ -7,7 +7,7 @@ require recipes-kernel/linux/linux-yocto.inc
7# to build multiple virtual/kernel providers, e.g. as dependency of 7# to build multiple virtual/kernel providers, e.g. as dependency of
8# core-image-rt-sdk, core-image-rt. 8# core-image-rt-sdk, core-image-rt.
9python () { 9python () {
10 if d.getVar("PREFERRED_PROVIDER_virtual/kernel") != "linux-yocto-rt": 10 if d.getVar("KERNEL_PACKAGE_NAME", True) == "kernel" and d.getVar("PREFERRED_PROVIDER_virtual/kernel") != "linux-yocto-rt":
11 raise bb.parse.SkipPackage("Set PREFERRED_PROVIDER_virtual/kernel to linux-yocto-rt to enable it") 11 raise bb.parse.SkipPackage("Set PREFERRED_PROVIDER_virtual/kernel to linux-yocto-rt to enable it")
12} 12}
13 13