Data processing system with virtual machines

Details Data processing system with virtual machines Data processing system with virtual machines

G - Physics

06

F

354/230.82

G06F 9/44 (2006.01) G06F 9/455 (2006.01) G06F 9/48 (2006.01) G06F 13/00 (2006.01) G06F 15/16 (2006.01)

Patent

CA 1200913

DATA PROCESSING SYSTEM WITH VIRTUAL MACHINES ABSTRACT OF THE DISCLOSURE A data processing system comprising at least two operating systems (OSl, OS2) for virtual machines, a supervisory operating system, i.e., a control program (CP) for controlling the operating systems, control registers (CR0, CRl, ---), and an extended control register (ECR) having a special bit. When a control register operating instruction (LCTC or STCTC) is generated from the operating systems under the condition that the special bit has a first value, the operating systems directly access the control register. When such a control register operating instruction is generated under the condition that the special bit has a second value, an interruption is generated in the supervisory operating system.

438043

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