Here is the incremental patch which should stick "strictly to the
script" of ljmp immediately after writing CR0.PE. This should be done
to the boot code as well; I'm waiting for confirmation from the Elan
original reporter before submitting that patch.
I decided to make this an incremental patch to make it bisectable versus
the other one, however, it should probably be considered the right thing.
Note: I have not tested this beyond compilation, I'm afraid.
-hpa