The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 2022
Filed:
Nov. 09, 2018
Arm Limited, Cambridge, GB;
Jason Parker, Sheffield, GB;
Martin Weidmann, Havervill, GB;
Gareth Rhys Stockwell, Cambridge, GB;
Matthew Lucien Evans, Cambridge, GB;
Arm Limited, Cambridge, GB;
Abstract
A realm management unit (RMU) manages ownership of memory regions by realms, each realm corresponding to at least a portion of a software process executed by processing circuitry. Memory access circuitry enforces ownership rights for the regions, with the owner realm having a right to exclude other realms from accessing data stored within its owned region. The memory access circuitry permits execution, from within a current realm, of program code stored in a target memory region having an owner realm other than the current realm, when the target memory region is owned by a code realm and a code realm authorisation tablestored in at least one memory region owned by the current realm indicates that execution of program code from the target memory region is permitted by the current realm.