Method to emulate message signaled interrupts with interrupt data

Patent metadata

Field	Value
Publication number	US-8996760-B2
Application number	US-201113976222-A
Country	US
Kind code	B2
Filing date	Nov 3, 2011
Priority date	Nov 3, 2011
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

Methods to emulate a message signaled interrupt (MSI) with interrupt data are described herein. An embodiment of the invention includes a memory decoder to monitor a predetermined memory block allocated to a device, an interrupt controller to receive an emulated messaged signaled interrupt (MSI) signal from the memory decoder in response to a posted write transaction to the predetermined memory block initiated from the device, and an execution unit to execute an interrupt service routine (ISR) associated with the device to service the MSI using interrupt data retrieved from the predetermined memory block, without having to obtain the interrupt data from the device via an input output (IO) transaction.

First claim

What is claimed is:

1. A processor, comprising:
a memory decoder to monitor a predetermined memory block allocated to a device in a memory accessible by the device, the memory decoder to detect a posted write transaction to the predetermined memory block by the device and to generate an emulated message signaled interrupt (MSI) signal for an MSI in response to poses write transaction;
an interrupt controller to receive the emulated MSI signal from the memory decoder and in respo…

Assignees

• Chew Yen Hsiang
• Intel Corp

Inventors

• Chew Yen Hsiang

Classifications

• G06F9/544

  Physics · mapped topic

• G06F9/4812

  Physics · mapped topic

• G06F13/24 Primary

  Physics · mapped topic