linux-kernel - Re: [PATCHv4 6/8] crypto: add rocksoft 64b crc guard tag framework

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Date:   Tue, 8 Mar 2022 23:03:07 +0100
From:   Vasily Gorbik <gor@...ux.ibm.com>
To:     Keith Busch <kbusch@...nel.org>
Cc:     linux-nvme@...ts.infradead.org, linux-block@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        axboe@...nel.dk, hch@....de, martin.petersen@...cle.com
Subject: Re: [PATCHv4 6/8] crypto: add rocksoft 64b crc guard tag framework

On Tue, Mar 08, 2022 at 01:46:12PM -0800, Keith Busch wrote:
> On Tue, Mar 08, 2022 at 12:27:47PM -0800, Keith Busch wrote:
> > On Tue, Mar 08, 2022 at 09:21:41PM +0100, Vasily Gorbik wrote:
> > > On Thu, Mar 03, 2022 at 12:13:10PM -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.
> > > 
> > > Hi Keith,
> > > 
> > > this is failing on big-endian systems. I get the following on s390:
> > 
> > Oh, I see the put_unaligned_le64() in chksum_final() was not the correct
> > action. I'll send an update, thank you for the report.
> 
> I'll set up a BE qemu target this week, but in the meantime, would you
> be able to confirm if the following is successful?

Sure,

[    0.543862] crc32: CRC_LE_BITS = 64, CRC_BE BITS = 64
[    0.543864] crc32: self tests passed, processed 225944 bytes in 118678 nsec
[    0.543986] crc32c: CRC_LE_BITS = 64
[    0.543987] crc32c: self tests passed, processed 112972 bytes in 58932 nsec
[    0.569479] crc32_combine: 8373 self tests passed
[    0.595330] crc32c_combine: 8373 self tests passed

it does the trick. Thanks!