Re: [Xen-devel] [PATCH] Hypercalls from HVM guests

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 21 Apr 2006, at 19:13, Steve Ofsthun wrote:

> With these changes you can make raw hypercalls from HVM guests.
You probably want a separate hypercall table from that of 
paravirtualized guests, for several reasons:
 1. Some hypercalls will not be HVM aware and are probably unsafe to 
run from an HVM context
 2. Some hypercalls may want different implementations (or at least a 
wrapper) on HVM
 3. On 64-bit, you may even want a separate 32-bit hypercall table 
containing wrappers that interface between 32-bit callers and the core 
64-bit hypercall functions.
(1) is most important right now -- we should only permit the hypercalls 
we need, and audit any others before they are added to the list.
 -- Keir


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