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. 06, 2021
Filed:
Mar. 28, 2019
Intel Corporation, Santa Clara, CA (US);
David Hansen, Portland, OR (US);
Ashok Raj, Portland, OR (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
A processor includes a processing core; a filter register to store a first permissions filter; and a memory management unit (MMU), coupled to the processing core, the filter register and a first peripheral device associated with the first permissions filter, wherein the MMU comprises a logic circuit to manage a shared page table comprising entries corresponding to the processing core and the first peripheral device, wherein the logic circuit is to; receive a memory access request for a first page of memory from the first peripheral device; determine whether the set of permission bits of the first entry match a first combination of bits of the first permissions filter; grant the memory access request if the set of permission bits match the first combination of bits of the first permissions filter; and cause a page fault if the set of permission bits do not matching the first combination of bits.