$5\mathrm{.}23[10]$$$5\mathrm{.}6>$ Section $5\mathrm{.}6$ discusses virtualization under the

assumption that the virtualized system is running the same ISA

as the underlying hardware. However, one possible use of

virtualization is to emulate non$-$native ISAs. An example of this is

QEMU, which emulates a variety of ISAs such as MIPS, SPARC,

and PowerPC. What are some of the difficulties involved in this

kind of virtualization? Is it possible for an emulated system to

run faster than on its native ISA?