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:
Jul. 24, 2018
Filed:
Sep. 25, 2015
Intel Corporation, Santa Clara, CA (US);
Siddhartha Chhabra, Portland, OR (US);
Binata Bhattacharyya, Portland, OR (US);
Raghunandan Makaram, Northborough, MA (US);
Brian S. Morris, Santa Clara, CA (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
A server, processing device and/or processor includes a processing core and a memory controller, operatively coupled to the processing core, to access data in an off-chip memory. A memory encryption engine (MEE) may be operatively coupled to the memory controller and the off-chip memory. The MEE may store non-MEE metadata bits within a modified version line corresponding to ones of a plurality of data lines stored in a protected region of the off-chip memory, compute an embedded message authentication code (eMAC) using the modified version line, and detect an attempt to modify one of the non-MEE metadata bits by using the eMAC within a MEE tree walk to authenticate access to the plurality of data lines. The non-MEE metadata bits may store coherence bits that track changes to a cache line in a remote socket, poison bits that track error containment within the data lines, and possibly other metadata bits.