KVM without Virtualization Extensions

Hi folks,

I have an old 64 bit machine that I want to use as a KVM host. The proc doesn't have virtualization extensions. I don't really care about performance, I would just like to be able to put this box to use. I want to be able to spin up virtual machines for testing, experimentation, etc.

So here's my question: is it possible to use KVM if my proc doesn't support virtualization extensions? (If so, I imagine I would just have to change one line in a config somewhere.)

Thanks!!