International Business Machines Corporation
Interrupt virtualization

Abstract:

Apparatuses, methods, program products, and systems are presented for interrupt virtualization. An apparatus includes an adapter module that detects a switch from a first physical input/output ("I/O") adapter associated with a logical partition to a second physical I/O adapter associated with the logical partition. The apparatus includes an interrupt module that updates one or more I/O interrupt management structures for the logical partition so that the logical partition receives I/O interrupt information from the second physical I/O adapter and not the first physical I/O adapter without the logical partition being aware of the switch to the second I/O adapter. The apparatus includes an abstraction module that updates physical device information at a hypervisor for the logical partition to reflect the switch to the second physical I/O device.