| 摘要 |
PURPOSE:To improve an instruction processing capacity by holding the identification information of a guest virtual computer for a prescribed time and comparing identification information with held information when the execution of the guest virtual computer is started and starting the execution of the computer in accordance with the comparison result. CONSTITUTION:A guest virtual computer (VM) mode register 5, an ACT-VM identification information (VMID) register 7, etc., are connected to an instruction executing part 1, and the register 7 is connected to a comparator 13 directly or through a LAST-VMID register 12, and a register 5, the circuit 13, etc., are connected to an address conversion buffer (TLB) write control part 2. When the execution of the guest VM is started, the guest VM is executed immediately if contents of registers 5 and 7 coincide with each other, and the valid field of a guest entry of the TLB 3 is invalidated to execute the guest VM; and when the execution of the guest VM is terminated, the identification information VMID of this VM is stored in a register 12 from the register 7.
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