Virtualization evolution

1. Binary Translation
2. Intel VT-x/AMD-v (put guest OS back to ring 0), software for MMU
3. Intel VT-x + EPT or AMD-v + AMD RVI (hardware MMU)

Paravirtualization (VMI) will make guest (if guest OS supports)performance improved significantly, while it will restrict the VM's compatibility for VMotion.

Transit Lockside Buffer TLB