CREATING A COMMUNICATION CHANNEL BETWEEN DIFFERENT PRIVILEGE LEVELS USING WAIT-FOR-EVENT INSTRUCTION IN SYSTEMS OPERABLE AT MULTIPLE HIERARCHICAL PRIVILEGE LEVELS

• Main Authors: WARKENTIN ANDREI, TUCH HARVEY
• Format: Patent
• Language: English
• Published: 16.06.2016
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

In a computer system operable at multiple hierarchical privilege levels, a "wait-for-event" (WFE) communication channel between components operating at different privilege levels is established. Initially, a central processing unit (CPU) is configured to to "trap" WFE instruction...