bhyve is a legacy-free hypervisor that was recently imported into the FreeBSD mainline kernel and is scheduled to be included in the FreeBSD 10.0 release.
As a legacy-free hypervisor, bhyve relies on modern features like Extended Page Tables and VirtIO which allow for high-performance despite a very small footprint. bhyve currently supports FreeBSD 8.3, 9.x and 10.0 guests but foreign guest support is under development.
Speakers: Paul Schenkeveld