linux-kernel - Re: IOMMU and graphics cards

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 7 May 2009 20:14:48 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	mingo@...e.hu
Cc:	fujita.tomonori@....ntt.co.jp, airlied@...ux.ie,
	linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
	mingo@...hat.com, dwmw2@...radead.org
Subject: Re: IOMMU and graphics cards

On Thu, 7 May 2009 13:01:35 +0200
Ingo Molnar <mingo@...e.hu> wrote:

> 
> * FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> wrote:
> 
> > > The proprietary drivers make problems so far. For the ATI one I 
> > > am in contact with the developers to try to fix it. But I can't 
> > > do anything about the other proprietary driver I am aware of :-(
> > 
> > I don't know anything about the graphic drivers but are there any 
> > other proprietary drivers except for ATI and AMD? Fixing only two 
> > drivers to make the majority happy?
> 
> ATI ~== AMD these days. The problem is Nvidia cards stuck into AMD 
> systems.

Oops, I meant ATI and Nvidia.


> I guess refusing those DMA accesses (and printing something 
> meaningful and relentlessly honest so that the user knows where the 
> problem comes from) is the proper solution.

Refusing DMA means that we will break these broken drivers. That's
what David and I like. Yeah, telling users explicitly who is to blame
for the problem is even better.

> There will be some 
> end-user moaning, there might be distros turning off the IOMMU code 
> summarily, but nvidia-in-AMD-box is an unfriendly alliance to begin 
> with.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/