Use this tag when asking specific hypervisors, hypervisor reverse engineering and hypervisor related CPU questions.

A hypervisor is computer software, firmware or hardware that creates and runs virtual machines.

A computer on which a hypervisor runs one or more virtual machines is called a host machine, and each virtual machine is called a guest machine. The hypervisor presents each of the guest operating systems with an environment that resembles a set of normal hardware while the hypervisor manages the execution of the guest operating systems, usually without the guest operating system's awareness or adjustment.