linux-kernel - Re: [PATCHv3 06/10] crypto: add rocksoft 64b crc framework

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Date:   Tue, 22 Feb 2022 11:56:59 -0800
From:   Eric Biggers <ebiggers@...nel.org>
To:     Keith Busch <kbusch@...nel.org>
Cc:     linux-nvme@...ts.infradead.org, linux-block@...r.kernel.org,
        linux-crypto@...r.kernel.org, x86@...nel.org,
        linux-kernel@...r.kernel.org, axboe@...nel.dk, hch@....de,
        martin.petersen@...cle.com, colyli@...e.de
Subject: Re: [PATCHv3 06/10] crypto: add rocksoft 64b crc framework

On Tue, Feb 22, 2022 at 08:31:40AM -0800, Keith Busch wrote:
> Hardware specific features may be able to calculate a crc64, so provide
> a framework for drivers to register their implementation. If nothing is
> registered, fallback to the generic table lookup implementation. The
> implementation is modeled after the crct10dif equivalent.
> 
> Signed-off-by: Keith Busch <kbusch@...nel.org>
> ---
>  crypto/Kconfig                  |   9 +++
>  crypto/Makefile                 |   1 +
>  crypto/crc64_rocksoft_generic.c | 104 +++++++++++++++++++++++++
>  include/linux/crc64.h           |   5 ++
>  lib/Kconfig                     |   9 +++
>  lib/Makefile                    |   1 +
>  lib/crc64-rocksoft.c            | 129 ++++++++++++++++++++++++++++++++
>  7 files changed, 258 insertions(+)
>  create mode 100644 crypto/crc64_rocksoft_generic.c
>  create mode 100644 lib/crc64-rocksoft.c

I tried testing this, but I can't because it is missing a self-test:

[    0.736340] alg: No test for crc64-rocksoft (crc64-rocksoft-generic)
[    5.440398] alg: No test for crc64-rocksoft (crc64-rocksoft-pclmul)

All algorithms registered with the crypto API need to have a self-test
(in crypto/testmgr.c).

- Eric