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Not all new hardware provides IOMMU. For instance, the i7-4770K does not have the VT-d extension, which is Intel's version of IOMMU. [1] [1] = http://ark.inte
by scrupulusalbion 11y ago
Not all new hardware provides IOMMU. For instance, the i7-4770K does not have the VT-d extension, which is Intel's version of IOMMU. [1]
[1] = http://ark.intel.com/products/75123/Intel-Core-i7-4770K-Processor-8M-Cache-up-to-3_90-GHz http://ark.intel.com/products/75123/Intel-Core-i7-4770K-Proc...
- wtallis 11y agoRight, 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.
- scrupulusalbion 11y agoIt 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] [1] = http://wiki.xenproject.org/wiki/VTd_HowTo http://wiki.xenproject.org/wiki/VTd_HowTo
- deleted 11y ago[deleted]