The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 2009
Filed:
Oct. 26, 2006
Makiko Shinohara, Hadano, JP;
Akiko Mori, Ebina, JP;
Shuhei Matsumoto, Yokohama, JP;
Isao Watanabe, Hadano, JP;
Hiroyuki Mitome, Hadano, JP;
Makiko Shinohara, Hadano, JP;
Akiko Mori, Ebina, JP;
Shuhei Matsumoto, Yokohama, JP;
Isao Watanabe, Hadano, JP;
Hiroyuki Mitome, Hadano, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A virtual machine control method and a virtual machine system are disclosed. In the case where a guest program can be operated in a plurality of address translation modes and the same guest virtual address is translated into different host real addresses in each address translation mode, the illegal access to a host real address by illegal address translation by double registration in the same page table is avoided, and the address translation mechanism is efficiently operated. A plurality of host page tables are prepared in the main storage, and one of the host page tables is selected with the change in address translation mode of the guest program. The bottom address of the selected host page table is set in the host page table register thereby to switch the host page table.