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/
Home Products Support Community News


RE: [Xen-devel] Question: PV and HVM device list

To: "Daniel P. Berrange" <berrange@xxxxxxxxxx>
Subject: RE: [Xen-devel] Question: PV and HVM device list
From: "Hu Jia Yi" <jyhu@xxxxxxxxx>
Date: Mon, 10 Sep 2007 09:54:23 +0800
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: Sun, 09 Sep 2007 18:54:52 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
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: Acfv02/6pnm4GsF9Si2YcotYnKEgPQDeYPjA
Thread-topic: [Xen-devel] Question: PV and HVM device list
May I know which source files I should read if I want to know how 
Xen assigns virtual devices to guest? I suspect "the asms file is
problem in installing winxp is because CD-rom is not assigned to winxp
when the winxp HVM domain is restarted.

Best regards,
Hu Jia Yi
Ext: 20430
Tel: 65-67510430

-----Original Message-----
From: Daniel P. Berrange [mailto:berrange@xxxxxxxxxx] 
Sent: Wednesday, September 05, 2007 11:43 PM
To: Hu Jia Yi
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] Question: PV and HVM device list

On Wed, Sep 05, 2007 at 02:13:58PM +0800, Hu Jia Yi wrote:
> I have two questions about xen. Hope I can find answers/hints in this
> mailing list.
> 1. how PV and HVM know about what physical devices are in the PC? 

They typically don't know anything about physical hardware. Normal
is to only assign virtual devices to guests - virtual network / disk or
sound & USB devices are most common (the latter two for HVM only).

> 2. If a USB disk is plugged in, how does xen notify this to PV and HVM
> so that the guest domains can do things as there were no
> layer.

Xen doesn't do anything when USB disks are plugged in. It is possible
admin tools to explicitly map a USB disk through to a guest as a virtual
disk, or in HVM case to hand-off the entire USB device to the guest.
is a manual admin config step though - nothing automatic occurrs.
553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505  -=| 

Xen-devel mailing list

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