linux-kernel - Re: [PATCH v5 4/4] RISC-V: crypto: add accelerated GCM GHASH implementation

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Date:   Fri, 07 Jul 2023 19:57:52 +0200
From:   Heiko Stübner <heiko@...ech.de>
To:     Herbert Xu <herbert@...dor.apana.org.au>
Cc:     palmer@...belt.com, paul.walmsley@...ive.com,
        aou@...s.berkeley.edu, 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
Subject: Re: [PATCH v5 4/4] RISC-V: crypto: add accelerated GCM GHASH implementation

Am Freitag, 16. Juni 2023, 12:34:55 CEST schrieb Herbert Xu:
> On Mon, Jun 12, 2023 at 11:04:42PM +0200, Heiko Stuebner wrote:
> >
> > +struct riscv64_ghash_ctx {
> > +	void (*ghash_func)(u64 Xi[2], const u128 Htable[16],
> > +			   const u8 *inp, size_t len);
> > +
> > +	/* key used by vector asm */
> > +	u128 htable[16];
> > +	/* key used by software fallback */
> > +	be128 key;
> 
> Where is the fallback?

Thanks for catching this. The fallback is of course not needed for the
Zbc-based variants but only for the future vector-based variants.

So this should not be in here but instead get added once its user is too.
I've moved this over to that part, that I'll post separately.

Heiko