| |
|
 |
|
 |
|
|
|
| |
|
|
xen-devel
Re: [Xen-devel] Re: [RFC] Make AGP work with IOMMU
|
To: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
|
Subject: |
Re: [Xen-devel] Re: [RFC] Make AGP work with IOMMU |
|
From: |
David Woodhouse <dwmw2@xxxxxxxxxxxxx> |
|
Date: |
Wed, 05 Aug 2009 07:44:56 +0100 |
|
Cc: |
xen-devel@xxxxxxxxxxxxxxxxxxx, Zhenyu Wang <zhenyu.z.wang@xxxxxxxxx>, Joerg Roedel <joerg.roedel@xxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, Dave Airlie <airlied@xxxxxxxxx>, Keir Fraser <kier.fraser@xxxxxxxxxxxxx> |
|
Delivery-date: |
Tue, 04 Aug 2009 23:45:34 -0700 |
|
Envelope-to: |
www-data@xxxxxxxxxxxxxxxxxxx |
|
In-reply-to: |
<4A78C9C6.6010103@xxxxxxxx> |
|
List-help: |
<mailto:xen-devel-request@lists.xensource.com?subject=help> |
|
List-id: |
Xen developer discussion <xen-devel.lists.xensource.com> |
|
List-post: |
<mailto:xen-devel@lists.xensource.com> |
|
List-subscribe: |
<http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe> |
|
List-unsubscribe: |
<http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe> |
|
References: |
<1248707041.6100.35.camel@xxxxxxxxxxxxxxxxxxxxx> <21d7e9970907282328l4a44b9a2of4500c5c84a3586b@xxxxxxxxxxxxxx> <1248851712.19733.214.camel@xxxxxxxxxxxxxxxxxxxxx> <21d7e9970907290143q6778511cvda1c6b915f61654a@xxxxxxxxxxxxxx> <1248860205.19733.238.camel@xxxxxxxxxxxxxxxxxxxxx> <4A78C9C6.6010103@xxxxxxxx> |
|
Sender: |
xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
On Tue, 2009-08-04 at 16:52 -0700, Jeremy Fitzhardinge wrote:
> And just when I have patches to use them for their original purpose...
>
> Looking back over the thread, are you saying that most users are already
> using the DMA API correctly for AGP accesses? If that's true then we
> should be just fine.
No, not 'most users'. But perhaps we should.
All we've done so far is make intel-agp use the DMA API correctly. And
that's conditional on CONFIG_DMAR. But we could make it unconditional,
and make the other drivers do it too. The code is all fairly generic.
Without an IOMMU, the overhead would be fairly minimal.
--
David Woodhouse Open Source Technology Centre
David.Woodhouse@xxxxxxxxx Intel Corporation
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
|
|
| |
|
Home