Peripheral switching device and a peripheral switching control device

A peripheral switching device configured to switch an ownership of a peripheral between a plurality of operating systems that concurrently operate in a computer system, comprising:

• an ownership switch request receiver unit configured to receive an ownership switch request for requesting to assign a peripheral to an operating system;
• an ownership request holding unit configured to receive and hold an ownership request for requesting to ensure or release an ownership of a peripheral to an operating system;
• a switching judgment unit configured to judge whether or not to execute an assignment of a peripheral to an operating system, in accordance with the ownership switch request and the ownership request;
• and
• a switching execution unit configured to execute the assignment of the peripheral to the operating system, in accordance with the judgment result.