Cryptographic memory ownership

US11403005B2 · kind B2 · utility

Assignee

• Intel Corporation · US

Inventors

• David M. Durham · Beaverton, US
• Ravi L. Sahita · Portland, US
• Vedvyas Shanbhogue · Austin, US
• Barry E. Huntley · Hillsboro, US
• Baiju V. Patel · Portland, US
• Gideon Gerzon · Jerusalem, IL
• Ioannis T. Schoinas · Portland, US
• Hormuzd M. Khosravi · Hillsboro, US
• Siddhartha Chhabra · Portland, US
• Carlos V. Rozas · Portland, US

Key dates

• Filing date: Sep 29, 2017
• Grant date: Aug 2, 2022
• Expiry date: Jan 7, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L9/3247
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

There is disclosed a microprocessor, including: a processing core; and a total memory encryption (TME) engine to provide TME for a first trust domain (TD), and further to: allocate a block of physical memory to the first TD and a first cryptographic key to the first TD; map within an extended page table (EPT) a host physical address (HPA) space to a guest physical address (GPA) space of the TD; create a memory ownership table (MOT) entry for a memory page within the block of physical memory, wherein the MOT table comprises a GPA reverse mapping; encrypt the MOT entry using the first cryptographic key; and append to the MOT entry verification data, wherein the MOT entry verification data enables detection of an attack on the MOT entry.