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 13:01:35 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Cc:	joerg.roedel@....com, dwmw2@...radead.org,
	linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
	mingo@...hat.com, airlied@...ux.ie
Subject: Re: IOMMU and graphics cards


* 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.

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. 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.

	Ingo
--
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/