Mastering KVM Virtualization

Appendix A. Converting a Virtual Machine into a Hypervisor

KVM needs the virtualization extension (# egrep '(vmx|svm)' /proc/cpuinfo) of CPU to run as a hypervisor. This means that you need multiple bare metal systems to test the examples provided in this book, which is a challenge for most of the sysadmins. What if you can test everything using your laptop?

Introducing nested KVM

Nested KVM is technology that enables KVM to run virtual machines inside a virtual machine. This enables the virtualization extension available on a physical CPU inside a virtual CPU.