1. A method comprising: storing a first security domain of a first memory page of a physical device and a second security domain of a second memory page of the physical device in registers of a translation lookaside buffer of a processor of the physical device; analyzing the first and second security domains of the first and second memory pages when an instruction of the first memory page attempts to reference or access the second memory page; and disallowing the instruction from the first memory page to reference or access the second memory page based at least in part on the analysis of the first and second security domains.