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arm64: Kconfig: add a choice for endianness 

When building allmodconfig KCONFIG_ALLCONFIG=$(pwd)/arch/arm64/configs/defconfig
CONFIG_CPU_BIG_ENDIAN gets enabled. Which tends not to be what most
people want. Another concern that has come up is that ACPI isn't built
for an allmodconfig kernel today since that also depends on !CPU_BIG_ENDIAN.

Rework so that we introduce a 'choice' and default the choice to
CPU_LITTLE_ENDIAN. That means that when we build an allmodconfig kernel
it will default to CPU_LITTLE_ENDIAN that most people tends to want.

Reviewed-by: John Garry <john.garry@huawei.com>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Anders Roxell 2019-11-13 10:26:52 +01:00 committed by Catalin Marinas
parent 32667745ca
commit d8e85e144b
1 changed files with 17 additions and 1 deletions
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arch/arm64/Kconfig
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@ -877,10 +877,26 @@ config ARM64_PA_BITS
default 48 if ARM64_PA_BITS_48 default 48 if ARM64_PA_BITS_48
default 52 if ARM64_PA_BITS_52 default 52 if ARM64_PA_BITS_52
choice
prompt "Endianness"
default CPU_LITTLE_ENDIAN
help
Select the endianness of data accesses performed by the CPU. Userspace
applications will need to be compiled and linked for the endianness
that is selected here.
config CPU_BIG_ENDIAN config CPU_BIG_ENDIAN
bool "Build big-endian kernel" bool "Build big-endian kernel"
help help
Say Y if you plan on running a kernel in big-endian mode. Say Y if you plan on running a kernel with a big-endian userspace.
config CPU_LITTLE_ENDIAN
bool "Build little-endian kernel"
help
Say Y if you plan on running a kernel with a little-endian userspace.
This is usually the case for distributions targeting arm64.
endchoice
config SCHED_MC config SCHED_MC
bool "Multi-core scheduler support" bool "Multi-core scheduler support"