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

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 Ofsthun - Virtual Iron Software, Inc.

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