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Re: [RFC PATCH] target/arm: use x86 intrinsics to implement AES instruct
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From: |
Peter Maydell |
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Subject: |
Re: [RFC PATCH] target/arm: use x86 intrinsics to implement AES instructions |
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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