International Business Machines Corporation

Daniel J Larson

Timothy J Schimke

Jesse Paul Arroyo

Charles Scott Graham

Ellen Marie Bauman

Managing flexible adapter configurations in a computer system including assigning an initial amount of resources to a set of empty expansion bus slots of the computer system; detecting an adapter has been attached to one of the set of empty expansion bus slots; receiving, by a hypervisor, a request for additional resources for use by the detected adapter, wherein the additional resources are in addition to the initial amount of resources assigned to the expansion bus slot occupied by the detected adapter; determining, by the hypervisor, an availability of the additional resources for the detected adapter; in response to determining that the additional resources are available for the detected adapter, assigning, by the hypervisor at runtime, the requested additional resources to the detected adapter.

Managing by a hypervisor flexible adapter configurations and resources in a computer system

According to an embodiment, a system, a method, and/or a computer program product is provided to allow a choice of allocating resources of a processor host bridge (PHB) at initial setup of a computer system to a group of peripheral component interconnect express (PCI-E) slots via a PCI-E switch, or alternatively to allocate resources of the PHB directly to a single PCI-E slot. The system may include a PHB, a first switch connected to the PHB, where the first switch is a simple circuit, a second switch connected to the first switch, where the second switch is a simple circuit, a PCI-E switch connected to the first switch and connected to the second switch, and a first PCI-E slot connected to the second switch.

Combining switch slot resources

Dynamically bypassing a peripheral component interconnect (PCI) switch including preparing, during run time, a PCI host bridge for disconnection from the PCI switch, wherein the PCI host bridge is connected to a first PCI slot via the PCI switch; toggling, during run time, an electrical switch, wherein toggling the electrical switch bypasses the PCI switch and creates a direct connection between the PCI host bridge and the first PCI slot; and configuring, during run time, the PCI host bridge for the direct connection between the PCI host bridge and the first PCI slot.

Growing community of inventors

Rochester, MN, United States of America

Daniel J Larson