US 10,922,111 B2 · Interrupt signaling for directed interrupt virtualization

Abstract

An interrupt signal is provided to a guest operating system. A bus attachment device receives an interrupt signal from a bus connected module with an interrupt target ID identifying a processor assigned for use by the guest operating system as a target processor for handling the interrupt signal. The bus attachment device forwards the interrupt signal to the target processor for handling. A translation of the interrupt target ID to a logical processor ID of the target processor is used to address the target processor directly. In addition, the bus attachment device updates a directed interrupt signal indicator of a directed interrupt signal vector assigned to the target processor in order to indicate that there is an interrupt signal addressed to the respective interrupt target ID to be handled.

Claims20

Dependent claims

A computer program product for providing an interrupt signal to a guest operating system executed using one or more processors of a plurality of processors of a computer system assigned for usage by the guest operating system, the computer program product comprising:

at least one computer readable storage medium readable by at least one processing circuit and storing instructions for performing a method comprising:
receiving, by a bus attachment device from a bus connected module of a plurality of bus connected modules operationally coupled to the plurality of processors via the bus attachment device, an interrupt signal with an interrupt target ID, the interrupt target ID identifying one processor of the plurality of processors assigned for usage by the guest operating system as a target processor to handle the interrupt signal;
selecting, by the bus attachment device, a directed interrupt signal vector assigned to the interrupt target ID to which the interrupt signal is addressed;
selecting, by the bus attachment device in the directed interrupt signal vector, a directed interrupt signal indicator assigned to the bus connected module which issued the interrupt signal;
updating, by the bus attachment device, the directed interrupt signal indicator such that the directed interrupt signal indicator indicates that there is the interrupt signal issued by the bus connected module and addressed to the interrupt target ID to be handled;
and
forwarding, by the bus attachment device, the interrupt signal to the target processor.

4 more elements

A computer system for providing an interrupt signal to a guest operating system executed using one or more processors of a plurality of processors of a computer system assigned for usage by the guest operating system, the computer system configured to perform a method, said method comprising:

receiving, by a bus attachment device from a bus connected module of a plurality of bus connected modules operationally coupled to the plurality of processors via the bus attachment device, an interrupt signal with an interrupt target ID, the interrupt target ID identifying one processor of the plurality of processors assigned for usage by the guest operating system as a target processor to handle the interrupt signal;
selecting, by the bus attachment device, a directed interrupt signal vector assigned to the interrupt target ID to which the interrupt signal is addressed;
selecting, by the bus attachment device in the directed interrupt signal vector, a directed interrupt signal indicator assigned to the bus connected module which issued the interrupt signal;
updating, by the bus attachment device, the directed interrupt signal indicator such that the directed interrupt signal indicator indicates that there is the interrupt signal issued by the bus connected module and addressed to the interrupt target ID to be handled;
and
forwarding, by the bus attachment device, the interrupt signal to the target processor.

3 more elements

A computer-implemented method of providing an interrupt signal to a guest operating system executed using one or more processors of a plurality of processors of a computer system assigned for usage by the guest operating system, the computer-implemented method comprising:

receiving, by a bus attachment device from a bus connected module of a plurality of bus connected modules operationally coupled to the plurality of processors via the bus attachment device, an interrupt signal with an interrupt target ID, the interrupt target ID identifying one processor of the plurality of processors assigned for usage by the guest operating system as a target processor to handle the interrupt signal;
selecting, by the bus attachment device, a directed interrupt signal vector assigned to the interrupt target ID to which the interrupt signal is addressed;
selecting, by the bus attachment device in the directed interrupt signal vector, a directed interrupt signal indicator assigned to the bus connected module which issued the interrupt signal;
updating, by the bus attachment device, the directed interrupt signal indicator such that the directed interrupt signal indicator indicates that there is the interrupt signal issued by the bus connected module and addressed to the interrupt target ID to be handled;
and
forwarding, by the bus attachment device, the interrupt signal to the target processor.

3 more elements

Dependencies are inferred from the claim text.

Interrupt signaling for directed interrupt virtualization

Life of this patent

Interrupt signaling for directed interrupt virtualization

Life of this patent

Abstract

Claims20