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From: Linus Torvalds <torvalds@linux-foundation.org>
To: Herbert Xu <herbert@gondor.hengli.com.au>
Cc: "David S. Miller" <davem@davemloft.net>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linux Crypto Mailing List <linux-crypto@vger.kernel.org>
Subject: Re: Crypto Update for 2.6.38
Date: Thu, 6 Jan 2011 10:05:46 -0800
Message-ID: <AANLkTikzg3Hndp8WRi59bvJdBLxi=p-1gt7aZDLYbSW8@mail.gmail.com> (raw)
In-Reply-To: <20110106000157.GA16089@gondor.apana.org.au>

On Wed, Jan 5, 2011 at 4:01 PM, Herbert Xu <herbert@gondor.hengli.com.au> wrote:
>
> * Crypto API interface for user-space (hash + skcipher)

Is there really any point to this? And can we get more explanation of
what the interface is, and who would use it?

If you need crypto in user space, it's almost invariably better done
in user space. If the CPU can do crypto on its own, and doesn't expose
those instructions to user space, it's just a stupid CPU - and the
user/kernel transfer is likely going to make it slower than a pure
software approach for any but the biggest transfers.

And if the crypto engine is off-chip, the sw version is going to be
faster anyway except for possible async versions that are hard to
interface to user space.

So I really need more convincing about the whole user-space interface.
Adding new interfaces willy-nilly isn't a good idea. They need damn
good reasons.

                                      Linus

  reply index

Thread overview: 246+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-12-25  0:17 Crypto Update for 2.6.29 Herbert Xu
2008-12-25  0:20 ` Herbert Xu
2009-03-24  4:49   ` Crypto Update for 2.6.30 Herbert Xu
     [not found]   ` <20090324044932.GA18245@gondor.apana.org.au>
2009-04-02  6:14     ` Herbert Xu
2009-05-17 22:28       ` Herbert Xu
2009-05-31 13:12         ` Herbert Xu
2009-06-13  2:05     ` Crypto Update for 2.6.31 Herbert Xu
2009-06-21 14:09       ` Crypto Fixes " Herbert Xu
2009-09-02 22:03         ` Herbert Xu
2009-09-10 14:19       ` Crypto Update for 2.6.32 Herbert Xu
     [not found]       ` <20090910141905.GA17948@gondor.apana.org.au>
2009-10-20  6:54         ` Crypto Fixes " Herbert Xu
2009-10-20  7:26           ` Herbert Xu
2009-11-23 12:05             ` Herbert Xu
2009-12-30  2:12           ` Crypto Fixes for 2.6.33 Herbert Xu
2010-02-01 19:52             ` Herbert Xu
     [not found]             ` <20100201195204.GA6953@gondor.apana.org.au>
2010-03-05  7:10               ` Crypto Fixes for 2.6.34 Herbert Xu
     [not found]               ` <20100305071043.GA3548@gondor.apana.org.au>
2010-04-27 13:55                 ` Herbert Xu
2010-06-03 10:05                   ` Crypto Fixes for 2.6.35 Herbert Xu
2010-06-03 16:26                     ` Linus Torvalds
2010-06-03 21:56                       ` Herbert Xu
2010-07-16  2:26                     ` Herbert Xu
2010-07-22  5:50                       ` Herbert Xu
2010-07-23  5:17                         ` Lee Nipper
2010-07-23  7:27                           ` Herbert Xu
2010-07-23 13:17                             ` Lee Nipper
2010-09-03  6:00                         ` Herbert Xu
2010-09-03 11:07                           ` Crypto Fixes for 2.6.36 Herbert Xu
2010-12-15 11:50                             ` Crypto Fixes for 2.6.37 Herbert Xu
2010-12-15 20:40                               ` Linus Torvalds
2010-12-16  0:49                                 ` Herbert Xu
2010-12-16  0:58                                   ` Herbert Xu
2011-02-16  5:39                               ` Crypto Fixes for 2.6.38 Herbert Xu
     [not found]                               ` <20110216053911.GA10999@gondor.apana.org.au>
2011-03-28  7:13                                 ` Crypto Fixes for 2.6.39 Herbert Xu
2011-06-29 23:51                                   ` Crypto Fixes for 3.0 Herbert Xu
2011-10-21  8:22                                     ` Crypto Fixes for 3.1 Herbert Xu
2011-10-21  9:41                                       ` David Rientjes
2011-10-21 11:35                                         ` Herbert Xu
2011-11-10 23:00                                       ` Crypto Fixes for 3.2 Herbert Xu
2011-11-26  2:34                                         ` Herbert Xu
2012-01-26  2:43                                     ` Crypto Fixes for 3.3 Herbert Xu
2012-01-26  3:35                                       ` Linus Torvalds
2012-01-26  4:07                                         ` Herbert Xu
2012-01-26  4:16                                           ` Linus Torvalds
2012-02-14  3:35                                       ` Herbert Xu
2012-02-16  5:32                                         ` Herbert Xu
2012-03-03  5:36                                           ` Herbert Xu
2012-03-22  1:20                                       ` Crypto Fixes for 3.4 Herbert Xu
2012-04-02  9:45                                         ` Herbert Xu
2012-04-20 14:16                                           ` Herbert Xu
2012-06-11 13:00                                         ` Crypto Fixes for 3.5 Herbert Xu
2012-06-18  8:24                                           ` Herbert Xu
2012-08-23  8:32                                       ` Crypto Fixes for 3.6 Herbert Xu
2012-09-11  4:10                                         ` Herbert Xu
2012-11-09  9:30                                         ` Crypto Fixes for 3.7 Herbert Xu
2013-03-28  8:28                                           ` Crypto Fixes for 3.9 Herbert Xu
2013-03-28 13:05                                             ` Chaoxing Lin
2013-03-28 13:52                                               ` Herbert Xu
2013-04-10  2:21                                             ` Herbert Xu
2013-04-22  0:34                                               ` Herbert Xu
2013-05-28  5:52                                             ` Crypto Fixes for 3.10 Herbert Xu
2013-06-10  9:05                                               ` Herbert Xu
2013-06-20 13:29                                                 ` Herbert Xu
2013-06-27 13:02                                                   ` Herbert Xu
2013-07-24  7:23                                             ` Crypto Fixes for 3.11 Herbert Xu
2013-09-13 11:30                                             ` Crypto Fixes for 3.12 Herbert Xu
2013-09-13 14:22                                               ` Linus Torvalds
2013-09-13 14:39                                                 ` Herbert Xu
2013-12-03 12:41                                             ` Crypto Fixes for 3.13 Herbert Xu
2013-12-09 11:57                                               ` Herbert Xu
2014-01-01  6:10                                                 ` Herbert Xu
2014-02-03 12:59                                                   ` Crypto Fixes for 3.14 Herbert Xu
2014-04-13 23:34                                                     ` Crypto Fixes for 3.15 Herbert Xu
2014-05-13 11:02                                                       ` Herbert Xu
2014-05-21 12:22                                                         ` Herbert Xu
2014-07-10  9:03                                                     ` Crypto Fixes for 3.16 Herbert Xu
2014-07-18 10:57                                                       ` Herbert Xu
2014-07-28 14:05                                                         ` Herbert Xu
2014-07-31 13:59                                                           ` Herbert Xu
2014-09-15 11:35                                                       ` Crypto Fixes for 3.17 Herbert Xu
2014-09-24 13:27                                                         ` Herbert Xu
2014-11-10  8:57                                                           ` Crypto Fixes for 3.18 Herbert Xu
2014-12-31  3:32                                                     ` Crypto Fixes for 3.19 Herbert Xu
2015-01-07  2:17                                                       ` Herbert Xu
2015-01-20  0:52                                                         ` Herbert Xu
2015-03-09  5:19                                                         ` Crypto Fixes for 4.0 Herbert Xu
2015-03-18  5:25                                                           ` Herbert Xu
2015-03-18 18:12                                                             ` Linus Torvalds
2015-04-25  8:03                                                         ` Crypto Fixes for 4.1 Herbert Xu
2015-05-05 10:06                                                           ` Herbert Xu
2015-05-11  5:56                                                             ` Herbert Xu
2015-05-20  6:54                                                               ` Herbert Xu
2015-05-22  4:05                                                                 ` Herbert Xu
2015-05-22 21:29                                                                   ` Linus Torvalds
2015-05-22 21:39                                                                     ` Herbert Xu
2015-05-26  8:43                                                                   ` Herbert Xu
2015-06-18  3:43                                                                     ` Herbert Xu
2010-09-04 10:45                           ` Crypto Fixes for 2.6.35 Chuck Ebbert
2010-09-04 12:22                             ` Herbert Xu
2010-11-13 12:59               ` Crypto Fixes for 2.6.37 Herbert Xu
2009-12-04 13:55     ` Crypto Update for 2.6.33 Herbert Xu
2010-02-26  0:49       ` Crypto Update for 2.6.34 Herbert Xu
2010-03-01  7:50         ` tip: origin tree boot crash Ingo Molnar
2010-03-01 14:55           ` Steffen Klassert
2010-03-03 14:42             ` Herbert Xu
2010-03-04  3:00               ` Ingo Molnar
2010-03-04  5:31                 ` Herbert Xu
2010-05-19  2:06         ` Crypto Update for 2.6.35 Herbert Xu
2010-05-21 10:44           ` Herbert Xu
2010-08-04 14:04             ` Crypto Update for 2.6.36 Herbert Xu
2010-10-24  6:16               ` Crypto Update for 2.6.37 Herbert Xu
     [not found]               ` <20101024061625.GA23715@gondor.apana.org.au>
2011-01-06  0:01                 ` Crypto Update for 2.6.38 Herbert Xu
2011-01-06 18:05                   ` Linus Torvalds [this message]
2011-01-06 21:16                     ` Herbert Xu
2011-01-06 21:23                       ` Linus Torvalds
2011-01-06 21:39                         ` Herbert Xu
2011-01-06 22:13                           ` Linus Torvalds
2011-01-06 22:30                             ` Herbert Xu
2011-01-06 22:33                               ` David Miller
2011-01-06 22:43                               ` Linus Torvalds
2011-01-06 22:53                                 ` Herbert Xu
2011-01-06 23:25                                   ` Linus Torvalds
2011-01-07  0:14                                     ` Herbert Xu
2011-01-07  2:43                                       ` David Miller
2011-01-07  3:04                                         ` Herbert Xu
2011-01-07  2:39                                   ` Pavel Roskin
2011-01-07  3:03                                     ` Herbert Xu
2011-01-07 12:04                             ` Neil Horman
2011-01-08 13:23                               ` Nikos Mavrogiannopoulos
2011-01-10 12:03                                 ` Neil Horman
2011-01-10 19:05                                   ` Dag Arne Osvik
2011-01-06 21:46                       ` Pavel Roskin
2011-01-06 21:49                         ` Herbert Xu
2011-01-06 23:02                         ` Mihai Donțu
2011-01-13  1:44                   ` Herbert Xu
2011-03-15 14:59                   ` Crypto Update for 2.6.39 Herbert Xu
2011-05-20 23:54                     ` Crypto Update for 2.6.40 Herbert Xu
2011-07-24  1:17                       ` Crypto Update for 3.1 Herbert Xu
2011-10-31  4:09                         ` Crypto Update for 3.2 Herbert Xu
2011-10-31 16:42                           ` Randy Dunlap
2011-10-31 17:16                             ` Linus Torvalds
2011-11-01  3:48                               ` Herbert Xu
2012-01-06  4:12                           ` Crypto Update for 3.3 Herbert Xu
2012-01-11 22:19                             ` Herbert Xu
2012-03-20  3:27                             ` Herbert Xu
2012-05-23  1:35                               ` Crypto Update for 3.5 Herbert Xu
2012-05-23 23:06                                 ` Linus Torvalds
2012-05-24  0:21                                   ` Herbert Xu
2012-05-24  8:36                                     ` Arnd Bergmann
2012-05-24  7:03                                   ` Linus Walleij
2012-07-25  8:41                                 ` Crypto Update for 3.6 Herbert Xu
2012-10-04  9:53                             ` Crypto Update for 3.7 Herbert Xu
2012-12-14 10:31                               ` Crypto Update for 3.8 Herbert Xu
2013-02-23  2:33                                 ` Crypto Update for 3.9 Herbert Xu
2013-05-02  1:47                                   ` Crypto Update for 3.10 Herbert Xu
2013-07-05  9:52                                     ` Crypto Update for 3.11 Herbert Xu
2013-09-07  3:55                                   ` Crypto Update for 3.12 Herbert Xu
2013-11-07  8:01                                     ` Crypto Update for 3.13 Herbert Xu
2013-11-12 16:41                                       ` Herbert Xu
2013-11-12 16:59                                         ` Borislav Petkov
2013-11-12 18:27                                           ` Herbert Xu
2013-11-19  2:21                                         ` [GIT] " Herbert Xu
2013-11-23  1:34                                         ` Herbert Xu
2013-11-23  1:40                                           ` Herbert Xu
2014-01-23 11:53                                       ` Crypto Update for 3.14 Herbert Xu
2014-04-01 10:00                                         ` Crypto Update for 3.15 Herbert Xu
2014-06-05  6:23                                           ` Crypto Update for 3.16 Herbert Xu
2014-06-08  2:56                                             ` Linus Torvalds
2014-06-08  4:55                                               ` Herbert Xu
2014-06-09  1:47                                               ` Steven Miao
2014-08-04 13:03                                             ` Crypto Update for 3.17 Herbert Xu
2014-10-07 13:18                                               ` Crypto Update for 3.18 Herbert Xu
2014-12-11 12:51                                                 ` Crypto Update for 3.19 Herbert Xu
2014-12-12 11:54                                                   ` Herbert Xu
2015-02-14  9:43                                                   ` Crypto Update for 3.20 Herbert Xu
2015-04-15  3:39                                                     ` Crypto Update for 4.1 Herbert Xu
2015-04-16  1:58                                                       ` Linus Torvalds
2015-04-16  2:37                                                         ` Linus Torvalds
2015-04-16  2:38                                                           ` Linus Torvalds
2015-04-16  2:42                                                             ` Herbert Xu
2015-04-16  2:49                                                               ` Linus Torvalds
2015-04-16  3:07                                                                 ` Herbert Xu
2015-04-16  3:34                                                                   ` Linus Torvalds
2015-04-23 19:27                                                                     ` Bobby Powers
2015-04-23 20:10                                                                       ` Ard Biesheuvel
2015-04-23 21:35                                                                         ` Bobby Powers
2015-04-24  6:37                                                                           ` [PATCH] crypto: x86/sha512_ssse3 - fixup for asm function prototype change Ard Biesheuvel
2015-04-24 12:20                                                                             ` Herbert Xu
2015-06-22  8:44                                                       ` Crypto Update for 4.2 Herbert Xu
2015-06-23  4:26                                                         ` Linus Torvalds
2015-06-23  4:32                                                           ` Herbert Xu
2015-06-24  2:11                                                         ` Linus Torvalds
2015-06-24 13:29                                                           ` Herbert Xu
2015-08-31 13:56                                                         ` Crypto Update for 4.3 Herbert Xu
2015-11-02  8:04                                                           ` Crypto Update for 4.4 Herbert Xu
2016-01-11 10:14                                                             ` Crypto Update for 4.5 Herbert Xu
2016-01-22 10:18                                                               ` Crypto Fixes " Herbert Xu
2016-02-01  8:31                                                                 ` Herbert Xu
2016-02-09 17:54                                                                 ` Herbert Xu
2016-03-23 13:09                                                                 ` Crypto Fixes for 4.6 Herbert Xu
2016-03-30  9:11                                                                 ` Herbert Xu
2016-04-14  6:25                                                                   ` Herbert Xu
2016-04-25 11:12                                                                     ` Herbert Xu
2016-04-20  9:49                                                                   ` Herbert Xu
2016-05-09  8:46                                                                   ` Herbert Xu
2016-05-13  5:59                                                                 ` Herbert Xu
2016-05-20  8:41                                                                   ` Crypto Fixes for 4.7 Herbert Xu
2016-05-30  6:31                                                                     ` Herbert Xu
2016-06-27  6:28                                                                     ` Herbert Xu
2016-08-16  8:48                                                                       ` Crypto Fixes for 4.8 Herbert Xu
2016-07-22  3:39                                                                     ` Crypto Fixes for 4.7 Herbert Xu
2016-07-23  3:10                                                                       ` Herbert Xu
2016-08-01  9:58                                                                 ` Crypto Fixes for 4.8 Herbert Xu
2016-08-23  9:51                                                                   ` Herbert Xu
2016-08-31 14:19                                                                     ` Herbert Xu
2016-09-05  9:33                                                                   ` Herbert Xu
2016-09-13 10:35                                                                     ` Herbert Xu
2016-09-19 11:21                                                                     ` Herbert Xu
2016-09-23 14:48                                                                     ` Herbert Xu
2016-10-25  2:34                                                                   ` Crypto Fixes for 4.9 Herbert Xu
2016-03-15  7:20                                                               ` Crypto Update for 4.6 Herbert Xu
2016-05-16  7:16                                                                 ` Crypto Update for 4.7 Herbert Xu
2016-07-25 10:53                                                                   ` Crypto Update for 4.8 Herbert Xu
2016-10-10  3:34                                                                     ` Crypto Update for 4.9 Herbert Xu
2015-06-26 10:22                                                     ` Crypto Fixes for 4.2 Herbert Xu
2015-06-26 20:07                                                       ` Linus Torvalds
2015-06-27  6:56                                                         ` Herbert Xu
2015-06-27 16:40                                                           ` Linus Torvalds
2015-06-29  7:32                                                             ` Herbert Xu
2015-06-30 13:51                                                       ` Herbert Xu
2015-07-13  4:08                                                         ` Herbert Xu
2015-08-03  7:16                                                           ` Herbert Xu
2015-08-17  8:27                                                             ` Herbert Xu
2015-09-08  9:25                                                       ` Crypto Fixes for 4.3 Herbert Xu
2015-09-16 10:30                                                         ` Herbert Xu
2015-09-26 20:01                                                           ` Herbert Xu
2015-10-13 12:17                                                             ` Herbert Xu
2015-10-13 17:23                                                               ` Linus Torvalds
2015-10-14  1:03                                                                 ` Herbert Xu
2015-10-14  2:00                                                                   ` Linus Torvalds
2015-10-14  2:38                                                                     ` Herbert Xu
2015-10-26 11:02                                                         ` Herbert Xu
2015-11-11  7:08                                                           ` Crypto Fixes for 4.4 Herbert Xu
2015-11-17  9:41                                                             ` Herbert Xu
2015-12-05  1:04                                                             ` Herbert Xu
2015-12-14  9:29                                                               ` Herbert Xu
2015-12-28 13:26                                                             ` Herbert Xu

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