Translate a virtual address about libmicrovmi

[kylerky]

Currently, it supports translation for Intel CPUs operating in IA32e mode (or 64-bit mode). 32-bit mode and others are not supported. In theory, it can do translation for all of the valid mappings, i.e, 4K, 2M and 1G mappings. However, I only have a unit test for the 2M case.

By the way, it assumes that the page entry it get is valid as dictated by the Intel manual (Reserved bits are 0s and so on).

Reference: Intel Developer Manuals, Volume 3, 4.5 4-Level Paging

[Wenzel]

Documentation:

• https://os.phil-opp.com/paging-implementation/
• https://osblog.stephenmarz.com/ch3.html

Also, it looks like this feature has already been implemented in kvmi-semantic crate:
https://github.com/kylerky/kvmi-rs/blob/master/kvmi-semantic/src/memory/address_space.rs#L210

cc @kylerky can you tell us more about the state virtual address translation in kvmi-semantic ?