Distributed hardware state management in virtual machines

Details Distributed hardware state management in virtual machines Distributed hardware state management in virtual machines

2011-01-25

2011-01-25

Cao, Diem K (Department: 2194)

Electrical computers and digital processing systems: interprogra

Device driver communication

C719S313000

Reexamination Certificate

active

07877760

ABSTRACT:
Mechanisms are disclosed herein that manage operations in virtual machine environments. A first partition can have a proxy driver object corresponding to a driver object in a second partition. The driver object can control a physical device, but because of the proxy driver object, the first partition can retain some measure of control over the physical device. The driver object can be surrounded by a first filter object beneath it, and a second filter object above it. The first filter object can provide interfaces to the driver object so that the driver object can perform various bus-related functionalities; and, the second filter object can receive redirected instructions from the first partition and provide them to the driver object, and intercept any instructions originating from within the second partition, such that if these instructions are inconsistent with policies set in the first partition, they can be manipulated.

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