From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Jan Beulich <JBeulich@novell.com>
Cc: dri-devel@lists.sourceforge.net, xen-devel@lists.xensource.com,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: Re: ATI radeon fails with "iommu=soft swiotlb=force" (seen on RV730/RV740 and RS780/RS800)
Date: Tue, 06 Oct 2009 12:01:31 -0700 [thread overview]
Message-ID: <4ACB940B.3050009@goop.org> (raw)
In-Reply-To: <4ACB177C0200007800018277@vpn.id2.novell.com>
On 10/06/09 01:10, Jan Beulich wrote:
>>>> Jeremy Fitzhardinge <jeremy@goop.org> 05.10.09 21:09 >>>
>>>>
>> vmalloc_32 is a general problem. The only clean way I can see to make
>> it work under Xen is to make sure all the pages in the DMA32 zone are
>> really under 4G in machine addresses. But that doesn't scale very well
>>
> Why? Just adding a hook in vmalloc.c would do.
>
Yeah, but I'm a bit allergic to suggesting new hooks.
> Hmm, yes, but the more cumbersome an API is to use, the less likely it
> is that people would want to adopt using it (or that it would be mergable
> in the first place)).
>
It would need a somewhat detailed survey to work out how many drivers
would be affected, and some input from other arch/iommu people to see if
it is at all helpful to them.
J
next prev parent reply other threads:[~2009-10-06 19:01 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-02 6:58 Re: ATI radeon fails with "iommu=soft swiotlb=force" (seen on RV730/RV740 and RS780/RS800) Boris Derzhavets
2009-10-02 17:18 ` Jeremy Fitzhardinge
2009-10-02 17:23 ` Boris Derzhavets
2009-10-02 18:42 ` Jeremy Fitzhardinge
2009-10-02 19:25 ` Boris Derzhavets
2009-10-05 10:32 ` Jan Beulich
2009-10-05 14:01 ` Konrad Rzeszutek Wilk
2009-10-05 14:37 ` Konrad Rzeszutek Wilk
2009-10-05 19:12 ` Jeremy Fitzhardinge
2009-10-05 14:41 ` [Xen-devel] " Alex Deucher
2009-10-05 14:49 ` Konrad Rzeszutek Wilk
2009-10-05 14:54 ` [Xen-devel] " Alex Deucher
2009-10-05 19:09 ` Jeremy Fitzhardinge
2009-10-06 8:10 ` Jan Beulich
2009-10-06 19:01 ` Jeremy Fitzhardinge [this message]
[not found] <20090930152149.GA29603@phenom.dumpdata.com>
2009-10-01 17:35 ` Konrad Rzeszutek Wilk
2009-10-01 19:07 ` Jeremy Fitzhardinge
2009-10-01 19:21 ` Konrad Rzeszutek Wilk
2009-10-02 12:52 ` Jan Beulich
2009-10-02 14:44 ` Konrad Rzeszutek Wilk
-- strict thread matches above, loose matches on Subject: below --
2009-10-02 5:02 Boris Derzhavets
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