WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] IOMMU support for HVM grant table mappings

To: "gibbs@xxxxxxxxxxx" <gibbs@xxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] IOMMU support for HVM grant table mappings
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Thu, 14 Jan 2010 09:30:36 +0000
Cc:
Delivery-date: Thu, 14 Jan 2010 01:30:56 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <4B4E4281.5040603@xxxxxxxxxxx>
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>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: AcqUm+RoBT0abBegQaWbfTuzfwbQkgAYFWhB
Thread-topic: [Xen-devel] IOMMU support for HVM grant table mappings
User-agent: Microsoft-Entourage/12.23.0.091001
It's probably an oversight.

 -- Keir

On 13/01/2010 22:00, "Justin T. Gibbs" <gibbs@xxxxxxxxxxx> wrote:

> Xen 4.0 recently added support for grant table mappings in the HVM P2M
> tables.
> The current code explicitly avoids adding an IOMMU mapping in this case.
> Is this an oversight or is there an architectural reason that the IOMMU is
> not updated?  This seems to be the last piece needed to allow HVM driver
> domains with PCI pass-thru devices to function without extra memory copies.
> 
> Thanks,
> Justin
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

<Prev in Thread] Current Thread [Next in Thread>