| 摘要 |
A specific one of shared devices 601 is associated with a non-privileged OS 200 not having control rights of the shared devices 601, as a specified device, and a control right of the specified device is given to a privileged OS 100 until activation of the non-privileged OS 200. When the non-privileged OS 200 is activated, the control right of the specified device is transferred from the privileged OS 100 to the non-privileged OS 200. Thus, when the non-privileged OS 200 uses the specified device, the non-privileged OS 200 can directly issue a request to use the specified device. Real-time responsiveness needed for the non-privileged OS 200 may be thereby ensured without the need for waiting for processes of a VM 300 and the privileged OS 100.
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