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    SubjectRe: [PATCH v9 4/4] crypto: Add Allwinner Security System crypto accelerator
    On Sat, May 23, 2015 at 04:35:36PM +0200, Boris Brezillon wrote:
    >
    > > Since all SG I get was always a multiple of 16 (AES BLOCK SIZE) it was a sort of confirmation.
    > >
    > > Herbert ? does am I right or a chunking test is missing for cbc(aes) in testmgr.h
    >
    > Okay, just sharing my vision of this thing (I'll let Herbert comment on
    > this aspect): I'd say that theoretically nothing prevents one from
    > splitting its sg list in chunks smaller than the block size, so I'd
    > say you should use the same trick for AES.

    Indeed, you must be able to handle a block that straddles two SG
    entries. If the hardware is not capable then you have to linearise
    it by copying or use a fallback.

    I can't believe we don't have a generic test for this in testmgr.

    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


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