From: David Woodhouse <dwmw2@infradead.org>
To: josh@joshtriplett.org,
James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: mcgrof@gmail.com, ksummit-discuss@lists.linuxfoundation.org,
jkkm@jkkm.org
Subject: Re: [Ksummit-discuss] [TECH TOPIC] Firmware signing
Date: Wed, 29 Jul 2015 09:29:33 +0100 [thread overview]
Message-ID: <1438158573.26913.216.camel@infradead.org> (raw)
In-Reply-To: <20150728185428.GD5307@cloud>
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On Tue, 2015-07-28 at 11:54 -0700, josh@joshtriplett.org wrote:
>
> For the drivers I'm most familiar with, new versions of firmware have
> new filenames and are requested from userspace in most-preferred to
> least-preferred order. The expectation of those drivers is that any
> given firmware version should be binary-identical.
Those drivers are Doing It Wrong™.
The filename of a firmware image is intended to be like the soname of a
library.
If the firmware is ABI-compatible and just has some bugs fixed or
performance improvements, then you don't need to change the driver at
all. You just get the new version of the firmware and it all works.
Only if the driver *needs* to change the way it talks to the firmware,
should the filename change.
--
David Woodhouse Open Source Technology Centre
David.Woodhouse@intel.com Intel Corporation
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next prev parent reply other threads:[~2015-07-29 8:29 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-28 13:36 David Howells
2015-07-28 14:23 ` David Woodhouse
2015-07-28 16:55 ` Luis R. Rodriguez
2015-07-28 15:10 ` James Bottomley
2015-07-28 15:22 ` Andy Lutomirski
2015-07-28 15:31 ` James Bottomley
2015-07-28 16:05 ` Andy Lutomirski
2015-07-28 16:10 ` James Bottomley
2015-07-28 16:15 ` David Woodhouse
2015-07-28 16:35 ` Andy Lutomirski
2015-07-28 16:44 ` David Howells
2015-07-28 17:03 ` Andy Lutomirski
2015-07-28 19:19 ` David Woodhouse
2015-07-28 19:31 ` Andy Lutomirski
2015-07-28 19:43 ` David Woodhouse
2015-07-28 22:03 ` James Bottomley
2015-08-11 20:24 ` David Howells
2015-08-11 21:56 ` Andy Lutomirski
2015-08-11 22:03 ` Luis R. Rodriguez
2015-08-12 18:22 ` David Howells
2015-08-12 18:45 ` David Woodhouse
2015-08-12 19:09 ` Andy Lutomirski
2015-08-12 19:15 ` James Bottomley
2015-08-12 19:25 ` Andy Lutomirski
2015-08-12 19:43 ` James Bottomley
2015-08-12 19:45 ` Andy Lutomirski
2015-08-12 19:59 ` James Bottomley
2015-08-13 7:03 ` Jan Kara
2015-08-13 14:01 ` James Bottomley
2015-08-12 22:46 ` David Howells
2015-08-12 22:51 ` Andy Lutomirski
2015-08-12 19:06 ` Andy Lutomirski
2015-08-12 22:39 ` David Howells
2015-08-12 22:45 ` Andy Lutomirski
2015-08-12 22:45 ` David Howells
2015-08-12 22:47 ` Andy Lutomirski
2015-07-28 16:18 ` David Howells
2015-07-28 16:42 ` James Bottomley
2015-07-28 17:05 ` Andy Lutomirski
2015-07-28 17:09 ` James Bottomley
2015-07-28 17:10 ` Andy Lutomirski
2015-07-29 2:00 ` James Morris
2015-07-28 16:58 ` Josh Boyer
2015-07-28 15:12 ` David Woodhouse
2015-07-28 18:47 ` Peter Jones
2015-07-28 19:14 ` David Howells
2015-07-28 19:52 ` Peter Jones
2015-07-28 16:17 ` David Howells
2015-07-28 16:59 ` James Bottomley
2015-07-28 19:11 ` David Howells
2015-07-28 19:34 ` Luis R. Rodriguez
2015-07-28 21:53 ` James Bottomley
2015-07-28 22:39 ` David Howells
2015-07-28 22:44 ` Andy Lutomirski
2015-07-29 8:39 ` David Woodhouse
2015-07-28 18:36 ` josh
2015-07-28 18:44 ` James Bottomley
2015-07-28 18:54 ` josh
2015-07-28 19:06 ` Luis R. Rodriguez
2015-07-28 21:38 ` Greg KH
2015-07-28 23:59 ` josh
2015-07-29 0:17 ` Greg KH
2015-07-29 9:37 ` David Woodhouse
2015-07-29 15:00 ` James Bottomley
2015-07-29 15:35 ` David Woodhouse
2015-07-29 16:38 ` James Bottomley
2015-07-29 17:32 ` David Woodhouse
2015-07-29 23:39 ` James Bottomley
2015-07-30 8:08 ` David Woodhouse
2015-07-30 13:48 ` James Bottomley
2015-07-30 14:21 ` Heiko Stübner
2015-07-30 14:30 ` James Bottomley
2015-07-30 15:01 ` David Woodhouse
2015-07-30 16:17 ` James Bottomley
2015-07-30 19:17 ` David Woodhouse
2015-07-31 14:41 ` Theodore Ts'o
2015-07-31 16:14 ` Tim Bird
2015-07-31 17:25 ` David Woodhouse
2015-07-30 16:24 ` Tim Bird
2015-07-29 16:35 ` Josh Triplett
2015-07-29 8:29 ` David Woodhouse [this message]
2015-07-29 11:57 ` Mark Brown
2015-07-29 12:02 ` David Woodhouse
2015-07-29 12:24 ` Mark Brown
2015-07-28 19:23 ` David Woodhouse
2015-07-28 19:19 ` David Howells
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