Hewlett-Packard Development Company, L.p.

Toshimitsu Kani

Dong Wei

Eric Hamilton

Raghuram Kota

A system for and method of coordinating actions of components between userspace and kernel are described. The system comprises a processor; zero or more hardware components coupled with the processor; and a memory coupled with the processor and comprising a set of processor-executable instructions. The instructions comprise a component handling state machine responsive to at least one of a kernel component or a userspace component; and at least one component interface thread in communication with the component handling state machine and configured to interact with at least one of the zero of more hardware components responsive to a signal from the component handling state machine.

Coordinated actions of kernel and userspace components

Systems and methods for efficient dynamic allocation of virtual machine resources are described herein. At least some illustrative embodiments include a method including executing virtual machine software on a real computer system (the virtual machine software including a hypervisor and a virtual machine including a plurality of virtual devices), associating each of the plurality of virtual devices with a unique subset of a real device within the real computer system, the hypervisor sending to virtual firmware within the virtual machine a request to eject that requires ejecting from the virtual machine one or more of the plurality of virtual devices, a virtual device resource object within the virtual firmware forwarding the request to eject to a virtual device resource driver executing on the virtual machine, and the virtual device resource driver causing individual ejections of each of the one or more virtual devices in response to the forwarded request.

Dynamic ejection of virtual devices on ejection request from virtual device resource object within the virtual firmware to virtual resource driver executing in virtual machine

Embodiments of the invention provide a method and an apparatus to collect and dynamically update system locality information during runtime. In one method embodiment, the present invention collects system locality information at boot time to be provided to an operating system. The system locality information describes distances between devices within an integrated processing system. The operating system is then notified that a triggering event has occurred that may potentially alter the distances between devices within the integrated processing system. Upon receipt of this notification, the operating system invokes an Advanced Configuration and Power Interface (ACPI) procedure that provides updated system locality information during runtime to reflect the changes in distances between devices within the integrated processor system after the occurrence of the triggering event.

Method and apparatus for providing updated system locality information during runtime

Embodiments of the present invention pertain to methods and systems are described for switching root cells for a computer system without requiring the computer system to be re-booted. In one embodiment, objects are used to represent fixed registers associated with a first cell and a second cell of the computer system. In response to detecting that the second cell should be used instead of the first cell as a root cell for the computer system, the objects are used to communicate information between firmware and an operating system associated with the computer system, wherein the information describes the fixed registers associated with the second cell.

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Windsor, CO, United States of America

Toshimitsu Kani