netdev - Re: [PATCH net-next v6 07/23] zinc: ChaCha20 ARM and ARM64 implementations

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Message-ID: <CAHmME9pbRabkGjNh-65S9qBNNS1GLJSwZ_tTM507S_Ezr1=QLg@mail.gmail.com>
Date:   Wed, 26 Sep 2018 17:45:20 +0200
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>,
        Netdev <netdev@...r.kernel.org>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        David Miller <davem@...emloft.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Samuel Neves <sneves@....uc.pt>,
        Andrew Lutomirski <luto@...nel.org>,
        Jean-Philippe Aumasson <jeanphilippe.aumasson@...il.com>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH net-next v6 07/23] zinc: ChaCha20 ARM and ARM64 implementations

On Wed, Sep 26, 2018 at 5:42 PM Ard Biesheuvel
<ard.biesheuvel@...aro.org> wrote:
>
> On Wed, 26 Sep 2018 at 16:02, Ard Biesheuvel <ard.biesheuvel@...aro.org> wrote:
> Actually, looking at the code again, the abstraction does appear to be
> fine, it is just the chacha20 code that does not make use of it.

So what you have in mind is something like calling simd_relax() every
4096 bytes or so?