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From: Pavitrakumar Managutte <pavitrakumarm@vayavyalabs.com>
Date: Thu, 16 May 2024 09:20:23 +0530
Message-ID: <CALxtO0=n+k9NDfH87JWkFHQfA=T2x+T-ekGh=SBmA6Ozk48qsw@mail.gmail.com>
Subject: Re: [PATCH v3 3/7] Add SPAcc ahash support
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: linux-crypto@vger.kernel.org, Ruud.Derwig@synopsys.com, 
	manjunath.hadli@vayavyalabs.com, bhoomikak@vayavyalabs.com
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Sure Herbert,
  Thanks a lot for the quick reply.
  I will update the partial hashing code to do a software fallback and
push the patch.

Warm regards,
PK


On Thu, May 16, 2024 at 8:45=E2=80=AFAM Herbert Xu <herbert@gondor.apana.or=
g.au> wrote:
>
> On Thu, May 16, 2024 at 08:41:57AM +0530, Pavitrakumar Managutte wrote:
> > Hi Herbert,
> >    The SPAcc crypto accelerator has the below design
> >
> >    1. The SPAcc does not allow us to read internal context (including
> > the intermediate hash).
> >        The hardware context is inaccessible for security reasons.
>
> In that case you cannot support the partial hashing APIs in Linux.
>
> You should use a software fallback for everything but the digest
> call.
>
> Cheers,
> --
> Email: Herbert Xu <herbert@gondor.apana.org.au>
> Home Page: http://gondor.apana.org.au/~herbert/
> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt