I edited /usr/src/lib/libkvm/kvm_vax.c and made the following
change which seems to be similar to the change Matt is listed
as having made to a handful of other arch specific kvm lib code.
This addition seems to allow the file to compile...  oh yeah,
I think I had to tweak the return value of _kvm_kvatop() by
casting it to (int) ... no idea whether any of this is right.

  #include "kvm_private.h"
 
+ #include <machine/vmparam.h>
 
  struct vmstate {