| Message ID | 20191113092652.28201-1-anders.roxell@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] arm64: Kconfig: add a choice for endianness | expand |
On Wed, Nov 13, 2019 at 10:26:52AM +0100, Anders Roxell wrote: > When building allmodconfig KCONFIG_ALLCONFIG=$(pwd)/arch/arm64/configs/defconfig > CONFIG_CPU_BIG_ENDIAN gets enabled. Which tends not to be what most > people want. Another concern that has come up is that ACPI isn't built > for an allmodconfig kernel today since that also depends on !CPU_BIG_ENDIAN. > > Rework so that we introduce a 'choice' and default the choice to > CPU_LITTLE_ENDIAN. That means that when we build an allmodconfig kernel > it will default to CPU_LITTLE_ENDIAN that most people tends to want. > > Reviewed-by: John Garry <john.garry@huawei.com> > Signed-off-by: Anders Roxell <anders.roxell@linaro.org> > --- > arch/arm64/Kconfig | 18 +++++++++++++++++- > 1 file changed, 17 insertions(+), 1 deletion(-) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index 64764ca92fca..c599b6b288be 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -877,10 +877,26 @@ config ARM64_PA_BITS > default 48 if ARM64_PA_BITS_48 > default 52 if ARM64_PA_BITS_52 > > +choice > + prompt "Endianness" > + default CPU_LITTLE_ENDIAN > + help > + Select the endianness of data accesses performed by the CPU. Userspace > + applications will need to be compiled and linked for the endianness > + that is selected here. > + > config CPU_BIG_ENDIAN > bool "Build big-endian kernel" > help > - Say Y if you plan on running a kernel in big-endian mode. > + Say Y if you plan on running a kernel with a big-endian userspace. > + > +config CPU_LITTLE_ENDIAN > + bool "Build little-endian kernel" > + help > + Say Y if you plan on running a kernel with a little-endian userspace. > + This is usually the case for distributions targetting arm64. Bah, my typo here: targetting -> targeting Catalin, could you take this with the above fixed, please? Acked-by: Will Deacon <will@kernel.org> Will
On Wed, Nov 13, 2019 at 10:26:52AM +0100, Anders Roxell wrote: > When building allmodconfig KCONFIG_ALLCONFIG=$(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> > Signed-off-by: Anders Roxell <anders.roxell@linaro.org> Queued for 5.5 (with the typo fixed). Thanks.
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 64764ca92fca..c599b6b288be 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -877,10 +877,26 @@ config ARM64_PA_BITS default 48 if ARM64_PA_BITS_48 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 bool "Build big-endian kernel" 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 targetting arm64. + +endchoice config SCHED_MC bool "Multi-core scheduler support"