linux-kernel - Re: [PATCH crypto-stable v3 2/2] crypto: arch/nhpoly1305

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Message-ID: <20200423203902.GB2796@gmail.com>
Date:   Thu, 23 Apr 2020 13:39:02 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     herbert@...dor.apana.org.au, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH crypto-stable v3 2/2] crypto: arch/nhpoly1305 - process
 in explicit 4k chunks

On Wed, Apr 22, 2020 at 05:18:54PM -0600, Jason A. Donenfeld wrote:
> Rather than chunking via PAGE_SIZE, this commit changes the arch
> implementations to chunk in explicit 4k parts, so that calculations on
> maximum acceptable latency don't suddenly become invalid on platforms
> where PAGE_SIZE isn't 4k, such as arm64.
> 
> Fixes: 0f961f9f670e ("crypto: x86/nhpoly1305 - add AVX2 accelerated NHPoly1305")
> Fixes: 012c82388c03 ("crypto: x86/nhpoly1305 - add SSE2 accelerated NHPoly1305")
> Fixes: a00fa0c88774 ("crypto: arm64/nhpoly1305 - add NEON-accelerated NHPoly1305")
> Fixes: 16aae3595a9d ("crypto: arm/nhpoly1305 - add NEON-accelerated NHPoly1305")
> Cc: Eric Biggers <ebiggers@...gle.com>
> Cc: stable@...r.kernel.org
> Signed-off-by: Jason A. Donenfeld <Jason@...c4.com>

arm64 normally uses PAGE_SIZE == 4k, so this commit message is a little
misleading.  Anyway, I agree with using 4k, so:

Reviewed-by: Eric Biggers <ebiggers@...gle.com>

- Eric