System and method for preventing user O.S. in VMM system from deenergizing device being used by service O.S.
US7844845B2 · kind B2 · utility
7Cited by
2References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2007 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Jul 2, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2009/45579
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A call from a user operating system (UOS) to BIOS to configure a connected device into a reduced energy consumption mode is routed through a virtual machine monitor (VMM). The VMM determines whether a service O.S. (SOS) is in need of the device and if so the VMM informs the UOS that the device has been configured as ordered, while allowing the SOS to complete its task with the device. If the SOS is not in need of the device, or at the completion of the SOS task with the device, the VMM passes the call to ACPI/BIOS to configure the device in the demanded energy consumption mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.