I have understoodthe contrary, fortheseitems.
http://www.virtuallyghetto.com/2013/06/will-intels-vmcs-shadowing-feature.html
"The coolest part about the research and software techniques developed by Jim and team, is that the technology has already been incorporated into the existing VMware vSphere ESXi, Workstation and Fusion products."
https://www.usenix.org/system/files/conference/atc12/atc12-final158.pdf
Regards,