The method (300), wherein: it is determined (306) that modification of the contents of one of a virtual machine monitor (VMM) managed active address translation data structure (206) is required, the content of the active address translation data structure (206) is used by a processor to address thereof cache-to-store and derive translations in a translation lookaside buffer (TLB) (204); an entry (210) in the active address translation data structure (206) is modified so that the entry (210) except for a part (214) corresponding to a respective entry (212) in a guest address translation data structure (208), wherein the guest address translation data structure (208) is used by a host software for address translation operations, wherein the portion (214) of the entry (210) is not modified (308), an intended for operational use by the guest software field (216) within the entry (212) of the guest address translation data structure (208) corresponds, and includes one or more access control indicators.