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Re: A Question to throw at you guys
From: |
Tom Bachmann |
Subject: |
Re: A Question to throw at you guys |
Date: |
Mon, 13 Nov 2006 21:30:23 +0100 |
User-agent: |
Thunderbird 1.5.0.7 (X11/20061004) |
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Richard Braun schrieb:
> [...] First you suggest using drivers
> in userspace, isolated from the kernel (that's the "don't trust drivers"
> part). [...]
>
> From my point of view, I don't see a way to reliably achieve the first
> part, as hardware devices can be considered as most privileged entities,
> potentially giving less privileged entities (device drivers) access to
> most privileged data.
While true, having device drivers in userspace is still a major
improvement. Drivers are isolated from each other, stray pointers are
not a problem anymore (at least for anyone but the driver itself). Chips
using DMA are still dangerous (more dangerous than other hardware even),
true. But not all devices rely on that, and dmammus are becoming
standard (?).
I've read and can easily imagine that userspace drivers simplify driver
development a lot (the reference is to a userspace usb stack written for
l3, I don't know the exact paper anymore, though).
- --
- -ness-
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Re: A Question to throw at you guys, Sam Mason, 2006/11/13
Re: A Question to throw at you guys, Richard Braun, 2006/11/13
- Re: A Question to throw at you guys,
Tom Bachmann <=
- Re: A Question to throw at you guys, Richard Braun, 2006/11/13
- Re: A Question to throw at you guys, Tom Bachmann, 2006/11/13
- Re: A Question to throw at you guys, Richard Braun, 2006/11/13
- Re: A Question to throw at you guys, Pierre THIERRY, 2006/11/14
- Re: A Question to throw at you guys, Tom Bachmann, 2006/11/14
Re: A Question to throw at you guys, Richard Braun, 2006/11/13
Re: A Question to throw at you guys, Nigel Williams, 2006/11/13
Re: A Question to throw at you guys, olafBuddenhagen, 2006/11/14
Re: A Question to throw at you guys, Christian Helmuth, 2006/11/14
Re: A Question to throw at you guys, olafBuddenhagen, 2006/11/14