Re: [PATCH] ARM: ep93xx: remove MaverickCrunch support

On Aug 3, 2021, at 7:58 AM, Arnd Bergmann arnd@kernel.org wrote:

On Tue, Aug 3, 2021 at 1:41 PM Martin Guy [off-list ref] wrote:

quoted

I forward opinion from people currently producing and supporting EP93XX boards:

Thanks a lot for bringing them in. I definitely don't want to remove support for
something that is actively being used, and we don't have to merge the patch
if they currently rely on MaverickCrunch on older platforms.

It does sound however like Jerome's customers are using a normal (softfloat)
Linus distro on EP93xx, rather than one using the original MaverickCrunch
FPU instructions. There are no plans to discontinue EP93xx support, there
is actually a good amount of recent work going into updating the platform.

Jerome, please let me know if I understood you correctly here. If your
customers do rely on MaverickCrunch support in user space, I would
leave that in the kernel for as long as ep93xx itself is supported, and instead
require building support with the GNU assembler to avoid having to
add support to the clang integrated assembler. If you don't know of anyone
using MaverickCrunch, I would go ahead with my patch to remove kernel
support.

     Arnd

Arnd,

You are correct on assuming usage of softfloat toolchains and not
using the MaverickCrunch unit. AFAIK, I am not aware of active users
of this FPU on recent setups.

 Jerome

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