1. A system comprising: a processor providing hardware virtualization; a memory to store a plurality of virtual machine data structures corresponding to a plurality of nested virtualization levels including a first nested virtualization level and a second nested virtualization level nested within the first nested virtualization level, the virtual machine data structures including a first virtual machine data structure corresponding to the first nested virtualization level and a second virtual machine data structure corresponding to the second nested virtualization level, the virtual machine data structures to assist management of the hardware virtualization provided by the processor; a plurality of nested virtual machines located within the nested virtualization levels, the nested virtual machines including a first nested virtual machine located within the first nested virtualization level and a second nested virtual machine located within the second nested virtualization level; and, a plurality of hypervisors to manage the nested virtual machines using the virtual machine data structures, the hypervisors including a root hypervisor to manage the first nested virtual machine using the first virtual machine data structure, the hypervisors including a first nested virtualization level hypervisor to run within the first nested virtual machine and to manage the second nested virtual machine using the second virtual machine data structure.