Computer system, interrupt relay circuit and interrupt relay method

摘要

A method for making it possible for a virtualization software (VMM) to generally identify a PCI function of an interrupt requester presupposing the existing I/O devices based on the PCI express is provided. An interrupt relay circuit (140a) is provided between an I/O device (142a) based on the PCI express and a PCI express bridge (128a). The interrupt relay circuit (140a) receives and relays an interrupt transaction issued by the I/O device, and records whether there is an interrupt request in an interrupt indicator (134) in association with an interrupt identifier (328a). A VMM 114 uniquely identifies an I/O device of interrupt requester by referring to the interrupt indicator (134).