[vbox-dev] about Hyper-V hypercall interface?

Huihong Luo huisinro at yahoo.com
Wed Sep 16 00:18:55 PDT 2009

That's nice to hear. Let me know if I can be helpful.
On the long run, I wouldn't be suprised if you guys implement a type 1 hypervisor from current vbox code.
- hl

--- On Wed, 9/16/09, Frank Mehnert <Frank.Mehnert at Sun.COM> wrote:

From: Frank Mehnert <Frank.Mehnert at Sun.COM>
Subject: Re: [vbox-dev] about Hyper-V hypercall interface?
To: vbox-dev at virtualbox.org
Date: Wednesday, September 16, 2009, 12:08 AM


On Wednesday 16 September 2009, Huihong Luo wrote:
> Not sure if this makes sene. I was wondering whether performance would be
> improved if vbox implements Hyper-V enlightenment interfaces? 
> Windows 7 (and later) is hypervisor aware. You can confirm this by checking
> the presence of winhv.sys, vmbus.sys, etc in system32\drivers dir. These
> drivers can pass through hardware requests directly to host. What if vbox
> implement some of them, and Windows 7 thinks itself is running on top of a
> hypervisor, hopefully it will be better performed as a guest OS? 
> Any plan in this direction?
> I checked Xen code, it implements a few of such calls.

Support is planned. Of course it makes sense to implement such interfaces
-- if they are well-accepted. In fact this is para-virtualization: Make
the guest aware that it runs inside a VM.

Kind regards,

Dr.-Ing. Frank Mehnert

Sitz der Gesellschaft:
Sun Microsystems GmbH, Sonnenallee 1, 85551 Kirchheim-Heimstetten
Amtsgericht München: HRB 161028
Geschäftsführer: Thomas Schröder, Wolfgang Engels, Wolf Frenkel
Vorsitzender des Aufsichtsrates: Martin Häring

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