I am trying to understand the intel-iommu.
a) I find mention of three address types. Untranslated Requests, Translation Requests and Translated Requests.
Translated Requests mean translation of host virtual to host physical.
But I am unclear about the other two requests. One of them should be GVA to HPA.
The VT-d spec does not clearly mention the difference.
b) Secondly, there are two levels of Address Translations. I am working in a non VM environment but still using IOMMU through VFIO. I was curious to know whether we really need two levels of translations as in my case.
Thanks
Saptarshi
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