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VFIO Tips and Tricks
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In order to enable KVM PCI passthrough, read about
`IOMMU groups and their structural layout in Linux`_; this
`five-part how-to series`_ explains the necessary terminologies.

.. _IOMMU groups and their structural layout in Linux: http://vfio.blogspot.com/2014/08/iommu-groups-inside-and-out.html
.. _five-part how-to series: http://vfio.blogspot.com/2015_05_01_archive.html