Re: [Xen-devel] [v7][RFC][PATCH 06/13] hvmloader/ram: check if guest memory is out of reserved device memory maps

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 03.11.14 at 12:58, <tiejun.chen@xxxxxxxxx> wrote:
> Firstly we have a rule that we just allow all devices associated one 
> RMRR to be assign same VM, right? So I mean while we create VM, we 
> always call current hypercall but inside hypercall, Xen can know which 
> devices will be assigned to this VM.

I.e. the hypercall (at least optionally) becomes per-domain rather
than global. And you imply that device assignment happens
before memory getting populated (which likely can be arranged
for in the tool stack if that's not already the case, but which isn't
currently mandated by the hypervisor).

Jan

> So Xen still lookup that RMRR list 
> but now Xen would check if these RMRR belongs to that device we want to 
> assign this domain. If yes, we just let that callback go through these 
> RMRR info from that list but exclude other unrelated RMRR. If not, we 
> don't go through any RMRR info so that 'nr_entries' is also zero.
> 
> Thanks
> Tiejun



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