Handling interrupts when virtual machines have direct access...

Details Handling interrupts when virtual machines have direct access... Handling interrupts when virtual machines have direct access...

2008-05-21

2010-12-14

Myers, Paul R (Department: 2111)

Electrical computers and digital data processing systems: input/

Interrupt processing

Interrupt inhibiting or masking

Reexamination Certificate

active

07853744

ABSTRACT:
In virtualized computer system in which a guest operating system runs on a virtual machine of a virtualized computer system and has direct access to a hardware device coupled to the virtualized computer system via a communication interface, a computer-implemented method of handling interrupts from the hardware device to the guest operating system includes: (a) receiving a physical interrupt from the hardware device on a shared interrupt line of an interrupt controller; (b) masking the shared interrupt line of the interrupt controller; (c) generating a virtual interrupt corresponding to the physical interrupt to the guest operating system; and (d) the guest operating system executing an interrupt service routine.

REFERENCES:
patent: 4843541 (1989-06-01), Bean et al.
patent: 5003468 (1991-03-01), Watanabe et al.
patent: 5974440 (1999-10-01), Brooks et al.
patent: 7000051 (2006-02-01), Armstrong et al.
patent: 7209994 (2007-04-01), Klaiber et al.

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