Handling Interrupts When Virtual Machines Have Direct Access to a Hardware Device

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 t...

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Bibliographic Details
Main Authors RAMANAN JYOTHIR, CREMEL OLIVIER, NELSON MICHAEL, MAHALINGAM MALLIK
Format Patent
LanguageEnglish
Published 27.11.2008
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary: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.
Bibliography:Application Number: US20080124893