GVM uses IOMMU for compartmentalization: This page has a comparison of the various IO assistance modes GVM can make use of (see comparison of assistance modes,

GVM uses IOMMU for compartmentalization: This page has a comparison of the various IO assistance modes GVM can make use of (see comparison of assistance modes, the Mdev Mode section, and the SR-IOV Mode section): https://openmdev.io/index.php/Virtual_IO_Internals https://openmdev.io/index.php/Virtual_IO_Internals This will probably also play a role in future developments like SIOV (Scalable IO Virtualization): https://lwn.net/ml/linux-kernel/20190222021927.13132-1-baolu.lu@linux.intel.com/ https://lwn.net/ml/linux-kernel/20190222021927.13132-1-baolu...