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From: Pascal Van Leeuwen <pvanleeuwen@insidesecure.com>
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>,
	"linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>
Subject: RE: another testmgr question
Date: Mon, 27 May 2019 12:41:57 +0000	[thread overview]
Message-ID: <AM6PR09MB35236E55357F5FA41AF47146D21D0@AM6PR09MB3523.eurprd09.prod.outlook.com> (raw)
In-Reply-To: CAKv+Gu85qp44C9Leydz=ES+ByWYoYSWMC-Kiv2Gw403sYBGkcw@mail.gmail.com

> And if you go that naive route, just fix everything in the driver, then
> you simply end up with something terribly inefficient because all those
> corner case checks end up in the fast path and eating up code space.
>
One thing I forgot to mention here that should especially interest you:
you add a lot of complexity to the *driver* that needs to verified and
maintained (by the kernel community?!). Some of these workarounds I had to
implement are really quite a convoluted mess and it's starting to take up
a significant portion of the driver's code base as well ... just to support
some fringe cases that are not even relevant to the hardware's main use
cases (as "we" as the "hardware vendor" see it) at all.

Note that I actually *have* implemented all these workarounds and my
driver is fully passing all fuzzing tests etc. I'm just not happy with it.

Regards,
Pascal van Leeuwen
Silicon IP Architect, Multi-Protocol Engines @ Inside Secure
www.insidesecure.com

  parent reply	other threads:[~2019-05-27 12:42 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <AM6PR09MB3523CED0B1587FCBDE4095A0D2010@AM6PR09MB3523.eurprd09.prod.outlook.com>
     [not found] ` <20190523185833.GA243994@google.com>
2019-05-23 19:32   ` another testmgr question Pascal Van Leeuwen
2019-05-23 20:05     ` Eric Biggers
2019-05-23 21:43       ` Pascal Van Leeuwen
2019-05-23 23:48         ` Eric Biggers
2019-05-24  8:44           ` Pascal Van Leeuwen
2019-05-24  8:46             ` Christophe Leroy
2019-05-24  8:49               ` Jeffrey Walton
2019-05-24  9:42                 ` Pascal Van Leeuwen
2019-05-24  9:21               ` Pascal Van Leeuwen
2019-05-24  9:25                 ` Ard Biesheuvel
2019-05-24  9:34                   ` Pascal Van Leeuwen
2019-05-24  9:45                     ` Ard Biesheuvel
2019-05-24  9:57                       ` Pascal Van Leeuwen
2019-05-24 11:09                         ` Ard Biesheuvel
2019-05-27  9:52                           ` Pascal Van Leeuwen
2019-05-24 10:13                       ` Pascal Van Leeuwen
2019-05-24 10:43                         ` Kamil Konieczny
2019-05-24 10:54                           ` Christophe Leroy
2019-05-27  9:44                       ` Pascal Van Leeuwen
2019-05-27  9:49                         ` Ard Biesheuvel
2019-05-27 10:04                           ` Pascal Van Leeuwen
2019-05-27 10:28                             ` Ard Biesheuvel
2019-05-27 10:43                               ` Pascal Van Leeuwen
2019-05-27 10:57                                 ` Ard Biesheuvel
2019-05-27 12:22                                   ` Pascal Van Leeuwen
2019-05-27 14:59                                     ` Ard Biesheuvel
2019-05-27 15:56                                       ` Pascal Van Leeuwen
2019-05-27 16:21                                         ` Ard Biesheuvel
2019-05-27 20:15                                           ` Pascal Van Leeuwen
2019-05-27 12:41                                   ` Pascal Van Leeuwen [this message]
2019-05-27 14:45                                     ` Ard Biesheuvel
2019-05-27 15:16                                       ` Pascal Van Leeuwen
2019-05-27 15:24                                         ` Ard Biesheuvel
2019-05-27 20:46                                           ` Pascal Van Leeuwen
2019-05-25  1:22                   ` Eric Biggers
2019-05-27  9:55                     ` Pascal Van Leeuwen
2019-05-24  9:27                 ` Stephan Mueller
2019-05-24  5:24         ` Ard Biesheuvel
2019-05-24  7:04           ` Kamil Konieczny
2019-05-24  7:47           ` Pascal Van Leeuwen
2019-05-24  9:15             ` Ard Biesheuvel
2019-05-24  9:28               ` Pascal Van Leeuwen
2019-05-24  6:21         ` Christophe Leroy
2019-05-24  8:04           ` Pascal Van Leeuwen
2019-05-24  6:14       ` Jeffrey Walton
2019-05-24  8:00         ` Pascal Van Leeuwen

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