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] [PATCH 2/3][RFC] MSI/MSI-X support fordom0/driverdomain

To: "Tian, Kevin" <kevin.tian@xxxxxxxxx>, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH 2/3][RFC] MSI/MSI-X support fordom0/driverdomain
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Mon, 28 May 2007 13:18:22 +0100
Delivery-date: Mon, 28 May 2007 05:14:26 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <D470B4E54465E3469E2ABBC5AFAC390F013B1E7D@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
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>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: Aceg/mz7PRs/d4jlSeu7V67d+hYswQACriSgAACTnuAAAZF9OQAB6/ZAAAEo6AYAAAay8AAAsQtAAABXBM0=
Thread-topic: [Xen-devel] [PATCH 2/3][RFC] MSI/MSI-X support fordom0/driverdomain
User-agent: Microsoft-Entourage/11.3.3.061214
On 28/5/07 13:12, "Tian, Kevin" <kevin.tian@xxxxxxxxx> wrote:

> My point is:
> - Xen itself doesn't take any usage of per-domain pirq namespace
> - Dom0 can stick to BIOS-scheme or a new pirq namespace scheme
> - Dom0 can also decide the scheme of domU by pciback
> 
> So why not let dom0 to own allocation for pirq namespace of all domains?

See the response I just posted. What if pciback is not the only place to
allocate irqs for domUs? Supporting both ways is cheap and easy even if we
don't make use of that flexibility and dom0 always does the allocation for
ever more. Case closed! :-)

 -- Keir



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