40 lines
1.7 KiB
Markdown
40 lines
1.7 KiB
Markdown
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# coreboot kconfig
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This is coreboot's copy of kconfig which tracks Linux as upstream but comes
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with a few patches for portability but also a few semantic changes.
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The patches that lead to this tree can be found in the patches/ subdirectory
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in a [quilt](http://savannah.nongnu.org/projects/quilt) friendly format that
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is also simple enough to manage manually with Unix tooling.
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## Updating kconfig
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The first step is to unapply the patches. This can either be done with quilt
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in an already-configured tree (`quilt pop -a` should cleanly unapply them all)
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or manually if quilt doesn't have its tracking metadata around yet:
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$ for i in `ls patches/*.patch | tac`; do patch -p1 -R -i "$i"; done
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The result should be a subtree that, apart from a few coreboot specific
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files on our side (e.g. documentation, integration in our build system)
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and a few files on the upstream end that we don't carry (e.g. the tests),
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is identical to the scripts/kconfig/ directory of Linux as of the most recent
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uprev we did. Check the uprev version by looking through
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`git log util/kconfig` output in our tree.
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Assuming that you want to uprev from Linux 5.13 to 5.14, with a Linux git tree
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available in ~/linux,
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$ cd util/kconfig && (cd ~/linux/ && git diff v5.13..v5.14 scripts/kconfig) | patch -p2`
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applies the changes to your local tree.
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Then reapply our patch train, which might be as simple as
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`quilt push -a --refresh` but might also require some meddling with the
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patches to make them apply again with the changes you just imported from
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Linux.
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Check that kconfig still works, `git add` and `git commit` the changes and
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write a meaningful commit message that documents what Linux kconfig version
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the tree has been upreved to.
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