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The size of EPN field in MAS2 depends on page size. This patch adds a mask to discard invalid bits in EPN field. Definition of EPN field from e500v2 RM: EPN Effective page number: Depending on page size, only the bits associated with a page boundary are valid. Bits that represent offsets within a page are ignored and should be cleared. There is a similar (but more complicated) definition in PowerISA V2.06. Signed-off-by: Fabien Chouteau <chouteau@adacore.com> Signed-off-by: Alexander Graf <agraf@suse.de>