arm64: Kconfig: add a choice for endianness (d8e85e14) · Commits · 戴 / test

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>

arch/arm64/Kconfig

+17 −1

Original line number	Original line	Diff line number	Diff line
	@@ -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"

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