This is a Vagrant 1.1+ plugin that adds a KVM provider to Vagrant, allowing Vagrant to control and provision KVM/QEMU VM.
VeeWee: the tool to easily build vagrant base boxes or kvm,virtualbox and fusion images
This article assumes a KVM guest that runs from raw or qcow2 devices using emulated ide access. Since some time now, full virtualisation for block devices is available, facilitating the benefit of paravirtualisation. Benchmarked in bonnie++, the difference looks like this, revealing a way better performance of virtio: