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:
Apr. 09, 2019
Filed:
Nov. 21, 2017
International Business Machines Corporation, Armonk, NY (US);
Doyle J. McCoy, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Embodiments of the present invention provide an approach for memory protection at a level of granularity above a 'page' level (e.g., enhancing the protection provided by a memory key-based system). The approach further provides such a level of protection at a process or task level by associating the physical page key with a virtual key that corresponds to a particular process/task. When access to the data is requested for a particular process or task, it is determined if a protection bit for the data is set, and if the physical page keys and/or virtual keys submitted pursuant to the request match that previously stored for the data and process/task. If so, access to the data is allowed for the particular process/task.