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] HPET in HVM guests

To: Jan Beulich <JBeulich@xxxxxxxxxx>
Subject: RE: [Xen-devel] HPET in HVM guests
From: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
Date: Mon, 21 Dec 2009 07:51:14 -0800 (PST)
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Delivery-date: Mon, 21 Dec 2009 07:52:20 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <4B2F514E0200007800026EF2@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/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
> From: Jan Beulich [mailto:JBeulich@xxxxxxxxxx]
> Sent: Monday, December 21, 2009 2:43 AM
> To: Dan Magenheimer
> Cc: Keir Fraser; xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: RE: [Xen-devel] HPET in HVM guests
> 
> >>> Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> 18.12.09 18:55 >>>
> >Are you suggesting that an HVM use of HPET should be
> >plumbed through to the hardware HPET?  Hardware HPET
> >access is verrrrryyyyyy slow and save/restore/migration
> >would likely be a problem.
> 
> No, I'm just talking about what you appear to call vHPET.
> 
> >And in any case, what do you expect to gain by using
> >HPET instead of another clocksource?
> 
> Certain Windows certification seem the require the presence (and
> visibility through ACPI tables) of HPET.

Do the WHQL rules allow for turning on a parameter
in the VM config file?  If so, setting hpet=1 should
work (though I haven't tested it in quite awhile so
bitrot might have set in).

Dan

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

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