Handling system interrupts with long running recovery actions

摘要

A method, processor, and computer system for handling interrupts within a hierarchical register structure. The method includes receiving at a root-level register an indication of an interrupt occurring at a lower level register in the register structure, using a system interrupt handler to invoke an error handler assigned to a set of registers of the structure that includes the lower level register, and using the invoked error handler to handle the interrupt and return to the system interrupt handler.

主权项

1. A method of handling interrupts in a processor comprising a hierarchical interrupt register structure, the method comprising:
receiving, at a root-level register of the interrupt register structure, an indication of an interrupt occurring at a lower level register of the interrupt register structure; invoking, using a system interrupt handler of the processor, an error handler assigned to a set of registers of the interrupt register structure that includes the lower level register; attempting, using the error handler, to lock one or more bits of the lower level register that caused the interrupt; and handling, upon determining the attempt to lock the one or more bits was successful, the interrupt using the error handler, wherein the error handler is further configured to return execution to the system interrupt handler upon determining the attempt to lock the one or more bits was not successful.