Loading patent…
AssigneePanasonic Intellectual Property Corporation of America
InventorsMasahiko Saito, Teruto Hirota, Hiroo Ishikawa
Estimating the term…
A virtual machine system is provided with a processor having only two privileged modes, a low privileged mode and a high privileged mode, and achieves both a security function for protecting digital copyrighted works or the like and an operating system switching function that guarantees system reliability. The virtual machine system is provided with a first and a second processor and executes a hypervisor on the first processor in the high privileged mode. An operating system on the second processor is executed by cooperation between the hypervisor running on the first processor and a program running on the second processor in low privileged mode. This eliminates the need for running the hypervisor on the second processor in the high privileged mode, thus allowing for execution on the second processor in the high privileged mode of a program for implementing the security function.
A virtual machine system comprising:
A virtual machine system control method for controlling a virtual machine system provided with a memory and with a first processor and a second processor each connected to the memory, the first processor and the second processor each provided with a low privileged mode and a high privileged mode higher than the low privileged mode, and the memory including an execution state storage region for storing execution state information on an execution state of a processor, the virtual machine system control method comprising:
Dependencies are inferred from the claim text.