WIP: hvt: x86_64: Allow for up to 4GB guest size #577
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The following is a commit done by @mato. I am creating this draft PR to open up for review and hopefully eventually have it merged. I may add comments or changes that I find helpful in understanding the code.
Allow for up to 4GB guest size on x86_64 by using up to four PDE entries.
TODO: Lightly tested only, not sure if this arrangement will conflict with any platform memory holes that "plain" KVM may map into guest memory.