Xvisor

Xvisor is a Type2 monolithic open source hypervisor that aims to provide lightweight, portable and flexible virtualisation solutions. It is supported on X86 and ARM CPU architectures. One major difference is that Xvisor is completely monolithic; so it has one common software for hardware access, CPU virtualisation and guest IO emulation. However, other virtualisation technologies such as KVM and Xen are partially based on monolithic and micro-kernels, respectively. Partially monolithic hypervisors such as KVM are an extension of general-purpose monolithic OSs (such as Linux), which provide host hardware access and CPU virtualisation in the kernel and guest IO emulation from an application running in the user space (such as Qemu). Microkernel hypervisors are usually lightweight micro-kernels providing basic host hardware access and CPU virtualisation in the kernel, whereas the rest are dependent upon managing guests (such as Dom0 of Xen). Refer to the Xvisor website

for more details and to download it.