[vbox-dev] GIM (Guest Interface Manager) in VirtualBox

Ramshankar ramshankar.venkataraman at oracle.com
Wed Oct 8 09:12:15 UTC 2014

On 10/ 7/14 10:56 PM, Zver, Ble wrote:
> Hi guys,
> I have installed win7 and win8 as a guest on vbox.
> I have tried to use GIM (Guest Interface Manager). I wanted use hyper-v
> compatibility interface in vbox from my win7/win8 guest.
> But all time when i try to write to hyper-v hypercall interface i catch
> exception.
> Should I enable somehow GIM (Guest Interface Manager)? Is this interface
> still support? How can I use it?

Currently none of the hypercalls are implemented. You'll get a guru 
meditation with (VERR_GIM_IPE_3) if the guest tries to do hypercalls but 
we had to expose availability of hypercalls as Windows expects it to be 
there even when it actually doesn't use it. This was needed to get other 
more vital things to work like TSC rate reporting, etc.

The basic framework is there, but at the moment, this is unreleased 
trunk code - so it's work in progress. Out of curiosity, what hypercall 
are you trying to implement by the way?


> Thank for help.
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