Filtering and remapping interrupts

Details Filtering and remapping interrupts Filtering and remapping interrupts

2011-01-18

2011-01-18

Rinehart, Mark (Department: 2111)

Electrical computers and digital data processing systems: input/

Interrupt processing

Programmable interrupt processing

C710S260000, C710S269000

Reexamination Certificate

active

07873770

ABSTRACT:
In one embodiment, an input/output memory management unit (IOMMU) comprises a control register and control logic coupled to the control register. The control register is configured to store a base address of a device table, wherein a given input/output (I/O) device has an associated device identifier that selects a first entry in the device table. The first entry comprises a pointer to an interrupt remapping table. The control logic is configured to remap an interrupt specified by an interrupt request received by the IOMMU from the given I/O device if the interrupt remapping table includes an entry for the interrupt.

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