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Re: [RFC PATCH] target/arm: use x86 intrinsics to implement AES instruct


From: Peter Maydell
Subject: Re: [RFC PATCH] target/arm: use x86 intrinsics to implement AES instructions
Date: Tue, 30 May 2023 17:45:24 +0100

On Tue, 30 May 2023 at 14:52, Ard Biesheuvel <ardb@kernel.org> wrote:
>
> ARM intrinsics for AES deviate from the x86 ones in the way they cover
> the different stages of each round, and so mapping one to the other is
> not entirely straight-forward. However, with a bit of care, we can still
> use the x86 ones to emulate the ARM ones, which makes them constant time
> (which is an important property in crypto) and substantially more
> efficient.

Do you have examples of workloads and speedups obtained,
by the way?

thanks
-- PMM



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