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:
Dec. 13, 2022
Filed:
Mar. 12, 2019
Arm Limited, Cambridge, GB;
Peter Richard Greenhalgh, Cambridge, GB;
Frederic Claude Marie Piry, Alpes Maritimes, FR;
Ian Michael Caulfield, Cambridge, GB;
Albin Pierrick Tonnerre, Nice, FR;
Arm Limited, Cambridge, GB;
Abstract
An apparatus comprises processing circuitryto perform data processing in response to instructions, the processing circuitry supporting speculative processing of read operations for reading data from a memory system; and control circuitryto identify whether a sequence of instructions to be processed by the processing circuitry includes a speculative side-channel hint instruction indicative of whether there is a risk of information leakage if at least one subsequent read operation is processed speculatively, and to determine whether to trigger a speculative side-channel mitigation measure depending on whether the instructions include the speculative side-channel hint instruction. This can help to reduce the performance impact of measures taken to protect against speculative side-channel attacks.