摘要:
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.
摘要:
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.
摘要:
A computer system includes a memory having a secure area and a plurality of processors using the memory. When an access-allowed program unit executed by one of the processors starts an access to the secure area, the program unit subject to execution by the other processors is limited to the access-allowed program unit.
摘要:
A computer system includes a memory having a secure area and a plurality of processors using the memory. When an access-allowed program unit executed by one of the processors starts an access to the secure area, the program unit subject to execution by the other processors is limited to the access-allowed program unit.
摘要:
The object of the present invention is to enable to utilize the sensor(s) in the manner that is optimized for the application, as well as easily. According to one aspect of the present invention, the invention provides a computer software configured to receive instructions from another software, collect information from one or a plurality of sensors based on said instructions, determine whether said information satisfies the conditions required by said instruction, and if so, report to that effect to said other software.