Charles Jacobsen authored Jun 04, 2014 and Vikram Narayanan committed Oct 25, 2016

Debug controls macros for vm exit and vm entry were
wrong (I wonder if the kvm guys know, it's in the stable
linux build).

I had to enable exiting on load / save to %cr3 for it
to run on emulab machines.

Tweaked vmx control debugging code, cleaned up
logic in adjust_vmx_controls, much simpler.