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-ppc-devel

Re: [Xen-devel] dom0 auto-translate mmap()

To: Keir Fraser <keir@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] dom0 auto-translate mmap()
From: Hollis Blanchard <hollisb@xxxxxxxxxx>
Date: Mon, 11 Jun 2007 12:50:15 -0500
Cc: xen-ia64-devel <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, xen-ppc-devel <xen-ppc-devel@xxxxxxxxxxxxxxxxxxx>
Delivery-date: Mon, 11 Jun 2007 10:48:31 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <C2933D88.107B3%keir@xxxxxxxxxxxxx>
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/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Organization: IBM Linux Technology Center
References: <C2933D88.107B3%keir@xxxxxxxxxxxxx>
Reply-to: Hollis Blanchard <hollisb@xxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
On Mon, 2007-06-11 at 17:57 +0100, Keir Fraser wrote:
> 
> 
> On 11/6/07 17:51, "Keir Fraser" <keir@xxxxxxxxxxxxx> wrote:
> 
> >> The net is that I would like to remove the above test. I wonder why it
> >> was added in the first place? Somebody has a privileged autotranslate
> >> domain and mistakenly tried to run the domain building tools?
> > 
> > Interesting. How does this work for ia64 currently? I think ia64 always runs
> > in auto-translate mode.
> 
> Oh, I see they have their own mmap function. Yes, I think the test can
> safely be removed.

Hmm, the ia64 privcmd_mmap() is certainly interesting. It is another
approach to the same problem: they explicitly pre-register some of the
gpfn space to the appropriate mfn space.

Long-term, that's probably a better approach, since it only hijacks gpfn
space as needed, rather than halving the physical address space. For the
moment though, it also looks like a fair amount of more code... :)

-- 
Hollis Blanchard
IBM Linux Technology Center


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

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