Patent application number | Description | Published |
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20120331465 | VIRTUAL MACHINE SYSTEM, VIRTUAL MACHINE CONTROL METHOD, VIRTUAL MACHINE CONTROL APPLICATION, AND SEMICONDUCTOR INTEGRATED CIRCUIT - A memory protection unit controls access by virtual machines to memory areas. By having a hypervisor executed by a processor and the memory protection unit cooperate, access to memory areas by each virtual machine is controlled such that access to designated areas is forbidden. Accordingly, each virtual machine is unable to access programs, data, and so on stored in areas forbidden thereto. | 12-27-2012 |
20130081016 | VIRTUAL COMPUTER SYSTEM, VIRTUAL COMPUTER CONTROL METHOD AND ACCUMULATION CIRCUIT - The present invention relates to a virtual machine system that includes a plurality of processors and executes a plurality of virtual machines in parallel with use of the plurality of processors. An aim thereof is to suppress power consumption without sacrificing the performance of the virtual machine system. When there are at least two processors that do not have any virtual machines allocated thereto, one of the at least two processors is supplied with power so as to be placed in a standby state, and a remaining one or more of the at least two processors are not supplied with power. | 03-28-2013 |
20130117745 | VIRTUAL COMPUTER SYSTEM, CONTROL METHOD FOR VIRTUAL COMPUTER SYSTEM, CONTROL PROGRAM FOR VIRTUAL COMPUTER SYSTEM, AND INTEGRATED CIRCUIT - When a process judging unit | 05-09-2013 |
20140020086 | VIRTUAL MACHINE SYSTEM, CONFIDENTIAL INFORMATION PROTECTION METHOD, AND CONFIDENTIAL INFORMATION PROTECTION PROGRAM - A virtual machine system that restricts use of confidential information only to the case where an authentication has resulted in success. The virtual machine system includes first virtual machine, second virtual machine, and hypervisor. The first virtual machine includes: storage unit storing confidential information; and authentication unit configured to perform authentication and notify the hypervisor of result of the authentication. The second virtual machine uses virtual device that is virtualized storage device. When having received authentication result indicating authentication success from the authentication unit, the hypervisor enables the second virtual machine to access, as substance of the virtual device, storage area storing the confidential information, and when not having received the authentication result indicating the authentication success from the authentication unit, the hypervisor disables the second virtual machine from accessing the storage area storing the confidential information. | 01-16-2014 |
20140196034 | VIRTUAL MACHINE CONTROL APPARATUS AND VIRTUAL MACHINE CONTROL METHOD - A virtual machine control apparatus | 07-10-2014 |