Interrupt handling in a virtual machine environment

Patent metadata

Field	Value
Publication number	US-8949498-B2
Application number	US-201213652493-A
Country	US
Kind code	B2
Filing date	Oct 16, 2012
Priority date	Aug 11, 2011
Publication date	Feb 3, 2015
Grant date	Feb 3, 2015

Abstract

A method for computing includes running a plurality of virtual machines on a computer having one or more cores and a memory. Upon occurrence of an event pertaining to a given virtual machine during a period in which the given virtual machine is unable to receive an interrupt, an interrupt message is written to a pre-assigned interrupt address in the memory. When the given virtual machine is able to receive the interrupt, after writing of the interrupt message, a context of the given virtual machine is copied from the memory to a given core on which the given virtual machine is running, and a hardware interrupt is automatically raised on the given core responsively to the interrupt message in the memory.

First claim

The invention claimed is:

1. A method for computing, comprising:
running a plurality of virtual machines on a computer having one or more cores and a memory and a peripheral device that is coupled to the one or more cores;
upon occurrence of an event originating at the peripheral device and pertaining to a given virtual machine, identifying at the peripheral device whether the given virtual machine is active or swapped out;
raising a hardware interrupt immediately upon identif…

Assignees

• Mellanox Technologies Ltd

Inventors

• Kagan Michael

Classifications

• G06F9/4812

  Physics · mapped topic

• G06F2009/45579

  Physics · mapped topic

• G06F9/45558 Primary

  Physics · mapped topic