linux-kernel - Re: [PATCH v4 0/4] Implement GCM ghash using Zbc and Zbkb extensions

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Date:   Wed, 29 Mar 2023 18:43:59 +0000
From:   Eric Biggers <ebiggers@...nel.org>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     palmer@...belt.com, paul.walmsley@...ive.com,
        aou@...s.berkeley.edu, herbert@...dor.apana.org.au,
        davem@...emloft.net, conor.dooley@...rochip.com,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-crypto@...r.kernel.org, christoph.muellner@...ll.eu,
        Heiko Stuebner <heiko.stuebner@...ll.eu>
Subject: Re: [PATCH v4 0/4] Implement GCM ghash using Zbc and Zbkb extensions

Hi Heiko,

On Wed, Mar 29, 2023 at 04:06:38PM +0200, Heiko Stuebner wrote:
>
> [PATCH v4 0/4] Implement GCM ghash using Zbc and Zbkb extensions

Has there been consideration of implementing AES-GCM instead of GHASH by itself?
This is what arm64 does, for example.  There is not currently any use case for
GHASH outside of AES-GCM, and it's more efficient to implement the full AES-GCM.

- Eric