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:
Aug. 30, 2016
Filed:
Nov. 19, 2013
Hitachi, Ltd., Tokyo, JP;
Tadashi Takeuchi, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A control method for an I/O device, the I/O device being shared by a hypervisor and a first guest OS, the hypervisor comprising a physical driver for using a physical function, the first guest OS comprising a virtual driver for using a virtual function, the control method comprising: a first step of acquiring, by the hypervisor, a state of the I/O device via the physical driver; a second step of monitoring, by the first guest OS, the hypervisor, thereby determining whether the hypervisor has been brought into a predetermined state or not; a third step of activating, by the first guest OS, a sub physical driver for operating the I/O device when the first guest OS determines that the hypervisor has been brought into the predetermined state; and a fourth step of carrying out, by the first guest OS, transmission/reception via a queue set in advance on the memory.