[Buildroot] [PATCH 1/1] arch/arm: Add Cortex-a53 CPU

Khem Raj raj.khem at gmail.com
Fri Aug 19 17:47:05 UTC 2016


> On Aug 19, 2016, at 1:03 AM, Thomas Petazzoni <thomas.petazzoni at free-electrons.com> wrote:
> 
> Hello,
> 
> On Fri, 19 Aug 2016 10:07:04 +1000, Matt Flax wrote:
>> Adds the Cortex-a53 CPU to the target architecture variant choice. This sets
>> the toolchain to use cortex-a53 as the target. The effect is that various
>> cortex-a53 tunings are enabled for the compilation of packages.
>> 
>> Signed-off-by: Matt Flax <flatmax at flatmax.org>
> 
> The A53 is an ARM64 CPU, so it should rather be added to
> Config.in.aarch64 (in which we don't yet have a CPU selection, but that
> can be added).
> 
> Or are you building a 32 bits ARM system for a Cortex-A53 ? In that
> case, adding it to Config.in.arm would be OK, but it's a bit annoying
> that we would have to duplicate many ARM CPUs between Config.in.arm and
> Config.in.aarch64.

64bit kernel with 32bit userspace is most common usecase as of now for
a53 that I see. so you need some sort of multilib.

> 
> Thomas
> --
> Thomas Petazzoni, CTO, Free Electrons
> Embedded Linux and Kernel engineering
> http://free-electrons.com
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