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It is a requirement that DT overlays in the kernel are applied at build
time to a base DTB in order to validate they can be applied and to
validate them against the DT schemas. DT overlays on their own may be
incomplete and can't be validated.
Add a kbuild check so this doesn't have to be checked and fixed
periodically.
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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This adds the following commits from upstream:
52f07dcca47c dtc: Add informative error for stray identifier
9cabae6b0351 checks: Fix detection of 'i2c-bus' node
605dc044c3fe New helper to add markers
7da5d106c740 fdtput: Fix documentation about existing nodes
53c63dd421d7 dtdiff: Use input format dtb for dtbo files
84d9dd2fcbc8 dtc: Add data_insert_data function
97011d1f4e98 meson: use override_find_program/override_dependency
b841391bbd08 srcpos: Define srcpos_free
e0b7749c26a9 Add alloc_marker
ecb21febfdd3 meson: port python bindings to build natively via meson and meson-python
7ebfcac8520e Makefile: deprecate in favor of Meson
f4c53f4ebf78 Use __ASSEMBLER__ instead of __ASSEMBLY__
205fbef17b7b Fix some typos
da85f91931e5 Remove duplicated words in documentation and comments
dd1b3e532d22 meson: support building libfdt without static library
1ccd232709d4 meson: don't build test programs by default
ce1d8588880a tests: When building .so from -O asm output mark as non-executable stack
915daadbb62d Start with empty __local_fixups__ and __fixups__ nodes
4ea851f5a44d Let get_subnode() not return deleted nodes
175d2a564c47 Use build_root_node() instead of open-coding it
18f4f305fdd7 build: fix -Dtools=false build
267efc7d4694 checks: Warn about missing #address-cells for interrupt parents
755db115355b libfdt: Add fdt_setprop_namelen_string()
bdca8612009e libfdt: Add fdt_setprop_namelen()
0f69cedc08fc libfdt_internal: fdt_find_string_len_()
56b2b30c5bd0 libfdt: add fdt_get_property_namelen_w()
1e8c5f60e127 Add clang-format config
6f183c7d9246 checks: Relax avoid_unnecessary_addr_size check to allow child ranges properties
66c7d0e6f4f3 tests/sw_tree1.c: fix unitialized saveptr
9a969f3b70b0 pylibfdt/libfdt.i: fix backwards compatibility of return values
4292b072a23a .github/workflows: update ubuntu runner to supported version
1c745a9bd169 libfdt: Remove fdt parameter from overlay_fixup_one_phandle
b3bbee6b1242 libfdt: Move the SBOM authors section
d1656730abfb Add a SBOM file in CycloneDX format
b75515af4576 libfdt: Remove extra semi-colons outside functions
2d10aa2afe35 Bump version to v1.7.2
48795c82bdb6 pylibfdt: Don't emit warnings from swig generate C code
838f11e830e3 fdtoverlay: provide better error message for missing `/__symbols__`
d1e2384185c5 pylibfdt/libfdt.i: Use SWIG_AppendOutput
18aa49a9f68d Escape spaces in depfile with backslashes.
f9968fa06921 libfdt.h: whitespace consistency fixups
9b5f65fb3d8d libfdt.h: typo and consistency fixes
99031e3a4a6e Bump version to v1.7.1
3d5e376925fd setup: Move setting of srcdir down to the bottom
e277553b9880 setup: Collect top-level code together
7e5a88984081 setup: Move version and full_description into a function
78b6a85c113b Tidy up some pylint warnings
3501d373f0a2 Require Python 3
The added include of string.h in libfdt_internal.h breaks the kernel
overriding libfdt_env.h with its own string functions, so it is dropped.
An upstream fix is pending.
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
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Commit aab94339cd85 ("of: Add support for linking device tree blobs
into vmlinux") introduced a mechanism to embed DTBs into vmlinux.
Initially, it was used for wrapping boot DTBs in arch/*/boot/dts/, but
it is now reused for more generic purposes, such as testing.
Built-in DTBs are discarded because KERNEL_DTB() is part of INIT_DATA,
as defined in include/asm-generic/vmlinux.lds.h.
This has not been an issue so far because OF unittests are triggered
during boot, as defined by late_initcall(of_unittest).
However, the recent clk KUnit test additions have caused problems
because KUnit can execute test suites after boot.
For example:
# echo > /sys/kernel/debug/kunit/clk_register_clk_parent_data_device/run
This command triggers a stack trace because built-in DTBs have already
been freed.
While it is possible to move such test suites from kunit_test_suites to
kunit_test_init_section_suites, it would be preferable to avoid usage
limitations.
This commit moves non-boot built-in DTBs to the .rodata section. Since
these generic DTBs are looked up by name, they do not need to be placed
in the special .dtb.init.rodata section.
Boot DTBs should remain in .dtb.init.rodata because the arch boot code
generally does not know the DT name, thus it uses the __dtb_start symbol
to locate it.
This separation also ensures that the __dtb_start symbol references the
boot DTB. Currently, the .dtb.init.rodata is a mixture of both boot and
non-boot DTBs. The __dtb_start symbol must be followed by the boot DTB,
but we currently rely on the link order (i.e., the order in Makefiles),
which is very fragile.
The implementation is kind of cheesy; the section is .dtb.init.rodata
when $(obj) starts with arch/$(SRCARCH)/boot/dts, and .rodata section
otherwise. This will be refactored later.
Fixes: 5c9dd72d8385 ("of: Add a KUnit test for overlays and test managed APIs")
Fixes: 5776526beb95 ("clk: Add KUnit tests for clk fixed rate basic type")
Fixes: 274aff8711b2 ("clk: Add KUnit tests for clks registered with struct clk_parent_data")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
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scripts/Makefile.lib is included not only from scripts/Makefile.build
but also from scripts/Makefile.{modfinal,package,vmlinux,vmlinux_o},
where DT build rules are not required.
Split the DT build rules out to scripts/Makefile.dtbs, and include it
only when necessary.
While I was here, I added $(DT_TMP_SCHEMA) as a prerequisite of
$(multi-dtb-y).
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
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