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ARM: mark CPU_ENDIAN_BE8 as deprecated

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Following the deprecation of big-endian ARMv8 mode in arch/arm64 in commit
1cf89b6bf6 ("arm64: Kconfig: Make CPU_BIG_ENDIAN depend on BROKEN"),
this does the same for ARMv7 (and v6), leaving the code around but
disabled by default: There are no known products that make use of this
mode any more, and it only hangs around for testing that it still works.

At the moment, there are no known bugs with big-endian ARMv7 mode, but
it does break occasionally and require someone to fix it.  By marking
the code as 'depends on BROKEN' now, it will no longer be covered by CI
testing. If any users remain, they can keep patching out the dependency
but are more likely to run into regressions.

The big-endian ARMv5 support (CONFIG_CPU_ENDIAN_BE32) in contrast is
still used on Intel IXP4xx platform, and is the only currently supported
mode there, so this one can still be enabled.

There is no timeline for actually removing the code at this point,
we will likely debate this if we ever remove IXP4xx support on arm,
or big-endian support on ARM64.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2026-06-17 16:13:56 +02:00
parent db75f16378
commit fe91e4e9da
1 changed files with 2 additions and 1 deletions
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3
arch/arm/mm/Kconfig
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@ -778,7 +778,8 @@ config CPU_LITTLE_ENDIAN
space builds.
config CPU_BIG_ENDIAN
bool "Build big-endian kernel"
bool "Build big-endian kernel (DEPRECATED)"
depends on ARCH_MULTI_V5 || BROKEN
depends on !LD_IS_LLD
help
Say Y if you plan on running a kernel in big-endian mode.