vmm0 at mainbus0
driver implements a virtual machine monitor
(VMM) suitable for executing virtual machines
(VMs). A VMM runs on the host
and provides facilities to execute one or more VMs, each of which is provided
with a suitable complement of virtual hardware.
These VMs run independently of the host, but may interact with it as any other
machine would (e.g. via network communications or other means).
VMs are allocated hardware resources by the VMM during creation, including:
- Virtual CPUs
- Virtual network interfaces
- Virtual disk images
- Virtual serial ports
Although VMs execute independently of each other and the host, they do consume
host resources and, as such, the number of VMs (and their configurations)
should be taken into consideration when planning host capacity.
driver requires suitable host CPU
capabilities in order to provide VM services. The
driver requires at least one CPU with
hardware-assisted virtualization capabilities and nested or extended paging
capabilities to be present on the host. For more information, consult the CPU
driver appeared in OpenBSD