Re: [Xen-devel] [rfc] [patch] more 'long' in the hypervisor interface

[Steve Ofsthun <sofsthun@xxxxxxxxxxxxxxx>]

Hollis Blanchard wrote:
> On Thu, 2006-06-29 at 10:37 -0400, Steve Ofsthun wrote:
>
> > For X86 there are probably two plans.  For paravirtual guests, there is a
> > strong desire to formalize the existing ABI.  This will force the 32-bit
> > and 64-bit ABIs to remain significantly different.  Since the underlying
> > hypervisors don't allow 32/64 mixed mode guests, there is little reason
> > to reconcile the two ABIs.  If the ABIs were identical today, you still
> > couldn't run mixed mode guests.
>
> Not sure I follow here. Identical ABIs would enable mixed mode guests,
> even if the current implementation doesn't support that, right? So that
> sounds like a good goal.

Yes, identical ABIs would enable mixed mode guests.  I was just trying to
point out that there are other issues (page table sharing, etc) that would
also need to be addressed before mixed mode PV guests would work.

Steve
--
Steve Ofsthun - Virtual Iron Software, Inc.

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