[PATCH v9 4/4] crypto: Add Allwinner Security System crypto accelerator

Boris Brezillon boris.brezillon at free-electrons.com
Mon May 18 00:24:49 PDT 2015

Hi Herbert,

On Mon, 18 May 2015 08:41:21 +0800
Herbert Xu <herbert at gondor.apana.org.au> wrote:

> On Sun, May 17, 2015 at 12:48:11PM +0200, Boris Brezillon wrote:
> > 
> > Yep, but then they shouldn't be declared with CRYPTO_ALG_ASYNC and as an

                                                                  not ^

> > ablkcipher algorithm (*Asynchronous* Block Cipher), right ?
> Right.  They can still use ablkcipher but should clear the ASYNC
> bit.

Okay, just to be sure, what does "Asynchronous" mean in ablkcipher or
ahash ?
Is it related to the fact that crypto operations can be done in
multiple steps (e.g.: one set_key + several encrypt chunk operations),
or is this something else ?

Best Regards,


Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering

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