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Re: [Xen-devel] Why does xc_map_foreign_range() refuse to map pfns below 1M from a domU
>>> On 04.12.13 at 13:01, Tomasz Wroblewski <tomasz.wroblewski@xxxxxxxxxx>
>>> wrote:
> On 12/04/2013 12:36 PM, Jan Beulich wrote:
>> But that's a fundamental thing to explain. As Ian says - foreign PFNs
>> shouldn't make it here, or else how do you know how to translate
>> them to MFNs (as you can't consult the local P2M table to do so)?
>>
> I was under the impression that the translation is done inside in xen inside
> HYPERVISOR_mmu_update,
That hypercall does translation only for auto-translated guests,
which a normal PV one clearly isn't.
Jan
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