Re: [help]: handling IO instructions for hybrid

[Mukesh Rathor <mukesh.rathor@oracle.com>]

On Mon, 06 Feb 2012 19:41:23 +0000
Keir Fraser <keir.xen@gmail.com> wrote:

> On 07/02/2012 02:26, "Mukesh Rathor" <mukesh.rathor@oracle.com> wrote:
> > 
> > I am figuring io access for hybrid guests, dom0 and domU. I see
> > that there are two ways: PV -> emulate_privileged_op(), or hvm
> > handles via handle_mmio()/handle_pio(). I am not familiar with
> > either one, and would help me lot if anybody expert in that can
> > suggest which way hybrid should go, both dom0 and domU. Any
> > suggestions would help. If there are any docs on this, that would
> > be great too.
> 
> Probably the PV route, for dom0 and domU. Really most things you want
> to do, the PV route is going to be the right way (unless you are
> PVHVM'ing certain things, e.g., like using EPT assistance for
> pagetable handling).
> 
>  -- Keir

Thanks Keir. Just to confirm, the hybrid should continue to request
iopl of 1, right?

Mukesh