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kernel-yocto: Support in-tree config fragments

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[This is currently an RFC as it depends on a separate patch to add
  support for config fragments with .config file extensions in
  yocto-kernel-tools:
  https://lists.yoctoproject.org/g/linux-yocto/message/14431]

In Linux 6.8, the in-tree rv32_defconfig file for 32-bit RISC-V support
was dropped in favour of a Makefile target which combines the RISC-V
defconfig with a config fragment '32-bit.config'. So to build for 32-bit
RISC-V using the in-tree configuration from an upstream kernel, we need
to be able to enable this 32-bit config fragment.

We can support this via KERNEL_FEATURES if we add the in-tree arch
config directory (arch/${ARCH}/configs) to the search path.

While we're here, let's also add the generic config directory
(kernel/configs) to the search path so in-tree config fragments such as
'hardening.config' can be used.

(From OE-Core rev: e4e50a9a93d606ba5fef8f10f1ec20deaed7ab9c)

Signed-off-by: Paul Barker <paul@pbarker.dev>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Paul Barker
2024-11-06 21:29:06 -05:00
committed by Richard Purdie
parent 78f25d9a9c
commit b40851ec03
1 changed files with 3 additions and 0 deletions
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3
meta/classes-recipe/kernel-yocto.bbclass
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@@ -248,6 +248,9 @@ do_kernel_metadata() {
fi
done
# allow in-tree config fragments to be used in KERNEL_FEATURES
includes="$includes -I${S}/arch/${ARCH}/configs -I${S}/kernel/configs"
# expand kernel features into their full path equivalents
bsp_definition=$(spp ${includes} --find -DKMACHINE=${KMACHINE} -DKTYPE=${LINUX_KERNEL_TYPE})
if [ -z "$bsp_definition" ]; then