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===PowerPC/Power ISA=== Page table entries for [[IBM]] [[PowerPC]]'s hashed page tables have a no-execute page bit.<ref>{{cite book|title=PowerPC Operating Environment Architecture Book III, Version 2.01|date=December 2003|page=31|publisher=[[IBM]]}}</ref> Page table entries for radix-tree page tables in the Power ISA have separate permission bits granting read/write and execute access.<ref>{{cite web|url=https://openpowerfoundation.org/?resource_lib=power-isa-version-3-0|title=Power ISA Version 3.0|page=1003|publisher=IBM|date=November 30, 2015}}</ref>
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