Re:Windows 10 Review
by wtallis on Thursday August 27, 2015 @12:32PM
(#10130415)
Right, Intel's an ass about product segmentation. But most hypervisors don't offer the option of doing any sort of PCI passthrough without a functional IOMMU, so they're not accidentally exposing anyone.
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Re:Windows 10 Review
by scrupulusalbion on Thursday August 27, 2015 @04:31PM
(#10131892)
It would be sensible for hypervisors to require IOMMU for all PCI passthrough, but it looks like Xen allows it without IOMMU for paravirtualised guests:
"VT-d Pass-Through is a technique to give a domU exclusive access to a PCI function using the IOMMU provided by VT-d. It is primarily targeted at HVM (fully virtualised) guests because PV (paravirtualized) pass-through does not require VT-d (altough it may be utilized too)."[1]