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Do you know what you are talking about, Popek-Goldberg virtualization is not emulation. Emulation involves translating machine instructions to another architecture which is extremely slow and actual cycle-by-cycle emulation is almost impossible. Virtualization is running a hypervisor below the standard guest OS to partition system resources (or provide security as in the Xbox360), and has nothing to do with translating PPC64 instructions to AMD64, there is no "glue-code" anywhere hypervisors are simply a lower-level machine resource partitioning mechanism, and there is nothing inherently inside a hypervisor which would aid in machine translation........