Abstract: An apparatus and a method for performing a resource rebalance during a boot operation of a computer is provided. The apparatus includes a resource manager that is coupled to a plurality of devices. The resource manager is configured to receive a signal indicative of a desired set of requested resources from each of the plurality of devices and to determine that a first child device requires more resources than an amount previously assigned thereto. The resource manager is configured to locate a lowest common parent device to the first child device, which forms a lowest common subtree and to determine a resource range and to calculate a resource requirement request for the lowest common subtree. The resource manager is further configured to compare the resource requirement to the resource range to determine if a first range of resources is adequate to satisfy a second range of requested resources.

Abstract: An apparatus and a method for performing a resource rebalance during a boot operation of a computer is provided. The apparatus includes a resource manager that is coupled to a plurality of devices. The resource manager is configured to receive a signal indicative of a desired set of requested resources from each of the plurality of devices and to determine that a first child device requires more resources than an amount previously assigned thereto. The resource manager is configured to locate a lowest common parent device to the first child device, which forms a lowest common subtree and to determine a resource range and to calculate a resource requirement request for the lowest common subtree. The resource manager is further configured to compare the resource requirement to the resource range to determine if a first range of resources is adequate to satisfy a second range of requested resources.

Abstract: A device list is created for an operating system and/or a virtualized operating system. A bus node is created for each bus. Interface nodes are created as child nodes of the respective bus and a status indicator indicates whether a device connected to the interface is accessible. A device node is created for the device connected to the interface. Virtualized interface nodes are created as child nodes of the device node for each virtual device included in the device and a status indicator indicates whether the respective virtual device is accessible. Then, devices and/or virtual devices may be added and/or removed utilizing the list. After a device and/or virtualized device has been removed for one operating system and/or virtualized operating system, it may then be added to another. In this way, devices and/or virtualized devices can be virtually hot plugged without physically connecting and/or disconnecting devices.

Abstract: In at least one embodiment, an apparatus for providing resources from a plurality of on-board device nodes to a hot-plugged device node in a computer is provided. The apparatus comprises a resource manager configured to receive a resource request over a bus system indicative of a set of desired resources from the hot-plugged device node. The resource manager is further configured to probe a parent device and at least one upper level device node positioned above the parent device node for the set of desired resources. The resource manager is further configured to provide the set of desired resources from the parent device node and one or more nodes of the at least one upper level device node over the bus system for transmission to the hot-plugged device node to enable the hot-plugged device node to operate in the intended manner.

Abstract: A device list is created for an operating system and/or a virtualized operating system. A bus node is created for each bus. Interface nodes are created as child nodes of the respective bus and a status indicator indicates whether a device connected to the interface is accessible. A device node is created for the device connected to the interface. Virtualized interface nodes are created as child nodes of the device node for each virtual device included in the device and a status indicator indicates whether the respective virtual device is accessible. Then, devices and/or virtual devices may be added and/or removed utilizing the list. After a device and/or virtualized device has been removed for one operating system and/or virtualized operating system, it may then be added to another. In this way, devices and/or virtualized devices can be virtually hot plugged without physically connecting and/or disconnecting devices.

Abstract: In at least one embodiment, an apparatus for providing resources from a plurality of on-board device nodes to a hot-plugged device node in a computer is provided. The apparatus comprises a resource manager configured to receive a resource request over a bus system indicative of a set of desired resources from the hot-plugged device node. The resource manager is further configured to probe a parent device and at least one upper level device node positioned above the parent device node for the set of desired resources. The resource manager is further configured to provide the set of desired resources from the parent device node and one or more nodes of the at least one upper level device node over the bus system for transmission to the hot-plugged device node to enable the hot-plugged device node to operate in the intended manner.