The need for embedded virtualization

Virtualization means different things to users with different types of applications. Most forms of virtualization employed in IT server environments aren't of interest to embedded system developers because they don't ensure that processing of time-critical tasks is deterministic. Instead, the way for single and multiprocessor platforms to support multiple operating environments while maintaining real-time responsiveness is to functionally partition processor resources so that they are controlled by specific operating environments, which run directly on the processor silicon rather than on virtual machine implementations.

refer
http://embedded-computing.com/articles/the-multiprocessor-multi-os-systems/#utm_source=Multicore%2Bmenu&utm_medium=text%2Blink&utm_campaign=articles