[Cryptography] Speeding up Linux disk encryption

[John-Mark Gurney]

Dan McDonald wrote this message on Thu, Apr 01, 2021 at 01:30 -0400:
> > Also floating point operations can throw their own interrupts, which could be problematic. (One is advised not to use floating point in Linux interrupt service routines for these reasons.) Does ARM AES hardware have similar problems? RISC-V?
> 
> I'd be VERY interested to know how other HW with AES acceleration handles these situations.

ARMv8 suffers from the same problem.  The AES instructions use the
SIMD/FP registers, which require saving between context switches..

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  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."