With the request to convert bounding to actual refusal, and then
doing so in new hooks, the two previously separate patches now
need to be in a series, with infrastructure work done first.
Clearly the checking in other load handlers could (and likely
wants to be) moved to separate check handlers as well, down the
road.

1: HVM: introduce hvm_point_entry()
2: HVM: split restore state checking from state loading
3: HVM: adjust save/restore hook registration for optional check handler
4: vPIT: check values loaded from state save record
5: vPIC: check values loaded from state save record

Jan