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Date: Thu, 17 Jun 2021 08:24:51 +1000
From: Paul Mackerras <paulus@ozlabs.org>
To: Segher Boessenkool <segher@kernel.crashing.org>
Subject: Re: [PATCH 01/11] powerpc: Add Microwatt platform
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On Wed, Jun 16, 2021 at 01:40:07PM -0500, Segher Boessenkool wrote:
> Hi Paul,
> 
> On Tue, Jun 15, 2021 at 08:57:43AM +1000, Paul Mackerras wrote:
> > --- a/arch/powerpc/Kconfig
> > +++ b/arch/powerpc/Kconfig
> > @@ -422,7 +422,7 @@ config HUGETLB_PAGE_SIZE_VARIABLE
> >  
> >  config MATH_EMULATION
> >  	bool "Math emulation"
> > -	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE
> > +	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT
> >  	select PPC_FPU_REGS
> 
> Why do you need this / want this, since you have FP hardware?

The FPU is optional, and doesn't fit in the smaller (-35T) version of
the Artix-7 that is readily available.

I should mention this in the commit message.

Paul.