enabling VT-x for Dom0?

enabling VT-x for Dom0?

[Mohamad Rezaei]

Thanks for previous helps. I am working on them.

Is there any way to enable vt-x[EPT] for Dom0. I am trying to do
something like what bitvisor has done, but using vastly helpful
functionalities of xen. And I need to ask; would we see any performance
improvement if we do this?

I know that virtual memory mechanism like shadow paging will isolate
dom0, and xen from each other. Implementation of virtual BIOS also will
help to prevent to use something like INT 15 to pass it through. In the
other words, Do we have isolation of xen, and Dom0 without even using VT-x?

-- 
Best Regards,
Mohamad Rezaei

Re: enabling VT-x for Dom0?

[Ian Campbell]

On Wed, 2011-12-28 at 11:29 +0000, Mohamad Rezaei wrote:
> Thanks for previous helps. I am working on them.
> 
> Is there any way to enable vt-x[EPT] for Dom0.

Not currently although you could checkout Mukesh Rathor's work on
supporting "hybrid" guests (PV guests running in a lightweight HVM
container) since this allows VT-x to be enabled even for PV guests. He
has posted several times to this list over the past year.

Ian.


>  I am trying to do
> something like what bitvisor has done, but using vastly helpful
> functionalities of xen. And I need to ask; would we see any performance
> improvement if we do this?
> 
> I know that virtual memory mechanism like shadow paging will isolate
> dom0, and xen from each other. Implementation of virtual BIOS also will
> help to prevent to use something like INT 15 to pass it through. In the
> other words, Do we have isolation of xen, and Dom0 without even using VT-x?
>