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Re: [Xen-devel] [PATCH v12 05/11] x86/mm: add HYPERVISOR_memory_op to acquire guest resources



>>> On 19.10.17 at 18:06, <julien.grall@xxxxxxxxxx> wrote:
> On 19/10/17 16:47, Jan Beulich wrote:
>> I don't understand: The refcounting is to be done by ARM-specific
>> code anyway, i.e. by the implementation of set_foreign_p2m_entry(),
>> not its caller. At least that's what I would have expected.
> 
> I thought I said it before, but it looks like not. Assuming the MFN is 
> always baked by a domain, the prototype would likely need to be extended 
> and take the foreign domain.
> 
> If it is not the case, we would need to find another way to do refcounting.

Well, adding another parameter can't be that bad of a problem to solve.

Jan


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