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

Frank Mehnert Frank.Mehnert at Sun.COM
Wed Sep 16 00:08:04 PDT 2009


Hi,

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,

Frank
-- 
Dr.-Ing. Frank Mehnert

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