path: root/meta/classes/kernel-yocto.bbclass
diff options
authorBruce Ashfield <>2019-12-29 22:07:21 -0500
committerRichard Purdie <>2019-12-30 23:39:09 +0000
commiteac8f2f9ca26bf8cdb7f554803fd73c73b0b576e (patch)
tree12e8b58c487b637c1eb0b12320192186a4b9f8ee /meta/classes/kernel-yocto.bbclass
parent482f1ae9b427578896babaf415f05694bf8c85ee (diff)
kernel-yocto: allow external (aka non-integrated) BSPs to supply patches
By default, only explicitly specified .scc files or patches are applied to a BSP as part of the patching phase. This allows the reference BSPs to be integrated into a kernel tree, and use the same meta data for tree generation and for runtime building. It also greatly simplies the processing of kernel meta data. That being said, if an external (and fully standalone) kmeta repository is used, it very well may contain both patches and configuration. To allow the BSP definition to supply patches and config, we introduce a new kernel meta data definition: define KMETA_EXTERNAL_BSP t This can be set in any .scc file that wants to specify both patches and configuration. If specifying this per-BSP is not desired, a secondary variable is used: KMETA_EXTERNAL_BSPS When that is set in a bbappend, any located BSP definitions will be used for both patches and configuration. (From OE-Core rev: 747ad3ca1e987668c8ed444cfc595d751bc0d0b2) Signed-off-by: Bruce Ashfield <> Signed-off-by: Richard Purdie <>
Diffstat (limited to 'meta/classes/kernel-yocto.bbclass')
1 files changed, 15 insertions, 0 deletions
diff --git a/meta/classes/kernel-yocto.bbclass b/meta/classes/kernel-yocto.bbclass
index ed9bcfa57c..87c681f1c3 100644
--- a/meta/classes/kernel-yocto.bbclass
+++ b/meta/classes/kernel-yocto.bbclass
@@ -182,6 +182,14 @@ do_kernel_metadata() {
if [ $? -ne 0 ]; then
bbfatal_log "Could not locate BSP definition for ${KMACHINE}/${LINUX_KERNEL_TYPE} and no defconfig was provided"
+ # if the bsp definition has "define KMETA_EXTERNAL_BSP t",
+ # then we need to set a flag that will instruct the next
+ # steps to use the BSP as both configuration and patches.
+ grep -q KMETA_EXTERNAL_BSP $bsp_definition
+ if [ $? -eq 0 ]; then
+ fi
meta_dir=$(kgit --meta)
@@ -195,6 +203,13 @@ do_kernel_metadata() {
+ # if KMETA_EXTERNAL_BSPS has been set, or it has been detected from
+ # the bsp definition, then we inject the bsp_definition into the
+ # patch phase below. we'll piggy back on the sccs variable.
+ if [ -n "${KMETA_EXTERNAL_BSPS}" ]; then
+ sccs="${bsp_definition} ${sccs}"
+ fi
# run2: only generate patches for elements that have been passed on the SRC_URI
elements="`echo -n ${sccs} ${patches} ${KERNEL_FEATURES}`"
if [ -n "${elements}" ]; then