This week NIST published a draft of 800-125-A, a.k.a. Security Recommendations for Hypervisor Deployment. The guide includes recommendations regarding platform architecture and baseline functions, and the agency is looking for comments and suggestions from professionals in the field so this is your chance to provide input.
Read more about it here:
http://www.securityweek.com/nist-seeks-comment-hypervisor-security-guide