Re: [PATCH] xen: modify kernel mappings corresponding to grantedpages

[Konrad Rzeszutek Wilk]

> > So I hadn't looked at this in detail, but I wonder if we can use the
> > MULTIcall for this? It looks like we need to do two hypercalls so why
> > not batch it?
> 
> That was going to be my next question. We should definitely batch these
> if possible.
> 
> > And while we are it - we could change the MMU ops to only do this on
> > initial domain and for the domU case do the old mechanism?
> 
> We need this in domU for driver domains and the like, don't we?

Sure, but I believe the majority of domU domains would not require this.

I was thinking that when we start playing with the device/driver domains
we would want to escalate the privilige level (or perhaps not)? Or
perhaps introcuce a new type - "if (xen_driver_domain())" to recognize
that we are special ?

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