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Re: [Xen-devel] [PATCH v6 08/14] vtd: add lookup_page method to iommu_ops
>>> On 12.09.18 at 11:05, <Paul.Durrant@xxxxxxxxxx> wrote:
>> From: Jan Beulich [mailto:JBeulich@xxxxxxxx]
>> Sent: 12 September 2018 10:03
>>
>> A HVM guest using the PV IOMMU is quite fine, but it shouldn't talk to
>> it in terms of MFNs.
>>
>
> Well, it has to talk MFNs at some level, surely? The output of the IOMMU is
> not subject to EPT/NPT, right?
Yes to the second question, but no to the first: The GFN -> MFN translation
should still be done inside Xen in the HVM case, imo (in the course of
manufacturing the PTE).
Jan
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