Method for detecting and processing sensitive non-privileged processor instructions in a virtual machine computer system

摘要

A method for detecting and processing sensitive non-privileged processor instructions in a virtual machine computer system running computer guest system processes in a virtualized manner on a central processing means checks the state of the virtual central processing means to be critical or not. In case the state is not critical normal virtual machine operation is continued. In case the state of the virtual central processing means is critical all instructions and thus each sensitive instruction can be emulated. To improve the performance in the critical state of the virtual CPU the instructions can be analyzed by single-stepping or pre-analyzing and setting a breakpoint before a sensitive instruction. This is followed by running the process up to the breakpoint directly and emulating the following sensitive instruction.