Paravirtualization and Architecture
Xen supports paravirtualized guests that run on the same architecture as Domain-0. Thus, if Domain-0 is running X86_64, paravirtualized guests must be X86_64 as well. To run a 32-bit guest on a 64-bit system, you must run it fully virtualized.
Like Domain-0, paravirtualized Linux guests run the Xen kernel instead of the regular kernel.
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