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The classic PV interface has given Xen a head start in the cloud computing era. However, with the advance of hardware technology, its usage has be declining significantly. The complexity of PV ABI has been a source of security bugs and friction between Xen and other communities.
This talk tries to lay out a plan to make x86 Xen configurable to support different guests types, and then move the PV ABI to a PVH container so that it is possible to support PV workload in a more secure manner.