x86 virtualization

In computing, x86 virtualization refers to hardware virtualization for the x86 architecture. It allows multiple operating systems to simultaneously share x86 processor resources in a safe and efficient manner.

In the late 1990s x86 virtualization was achieved by complex software techniques, necessary to compensate for the processor's lack of virtualization support while attaining reasonable performance. In 2006, both Intel (VT-x) and AMD (AMD-V) introduced limited hardware virtualization support that allowed for simpler virtualization software but offered very little speed benefits. Greater hardware support, which allowed for substantial speed improvements, came with later processor models.