From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Subject: Re: [PATCH net-next v6 07/23] zinc: ChaCha20 ARM and ARM64 implementations
Date: Wed, 26 Sep 2018 17:45:20 +0200
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Cc: Herbert Xu <herbert@gondor.apana.org.au>,
        Thomas Gleixner <tglx@linutronix.de>,
        LKML <linux-kernel@vger.kernel.org>,
        Netdev <netdev@vger.kernel.org>,
        Linux Crypto Mailing List <linux-crypto@vger.kernel.org>,
        David Miller <davem@davemloft.net>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Samuel Neves <sneves@dei.uc.pt>,
        Andrew Lutomirski <luto@kernel.org>,
        Jean-Philippe Aumasson <jeanphilippe.aumasson@gmail.com>,
        Russell King - ARM Linux <linux@armlinux.org.uk>,
        linux-arm-kernel@lists.infradead.org
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>
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On Wed, Sep 26, 2018 at 5:42 PM Ard Biesheuvel
<ard.biesheuvel@linaro.org> wrote:
>
> On Wed, 26 Sep 2018 at 16:02, Ard Biesheuvel <ard.biesheuvel@linaro.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?