Re: [RFC PATCH] arm64/fpsimd: Don't disable softirq when touching FPSIMD/SVE state

[Sebastian Andrzej Siewior]

On 2019-02-13 16:40:00 [+0100], Ard Biesheuvel wrote:
> > > This is equal what x86 is currently doing. The naming is slightly
> > > different, there is irq_fpu_usable().
> >
> > Yes, I think it's basically the same idea.
> >
> > It's been evolving a bit on both sides, but is quite similar now.
> >
> 
> may_use_simd() only exists because we have a generic crypto SIMD
> helper, and so we needed something arch agnostic to wrap around
> irq_fpu_usable()

My question was more if this is helpful and we want to keep or if
it would be better to remove it and always disable BH as part of SIMD
operations.

Sebastian