Directed interrupt virtualization with blocking indicator

US11023398B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Christoph Raisch · Gerlingen, DE
• Marco Kraemer · Sindelfingen, DE
• Donald W. Schmidt · Stone Ridge, US
• Bernd Nerz · Eppelheim, DE
• Sascha Junghans · Herrenberg, DE
• Peter D. Driever · Poughkeepsie, US

Key dates

• Filing date: Feb 13, 2020
• Grant date: Jun 1, 2021
• Expiry date: Feb 13, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F2212/154
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

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 checks whether the target processor is blocked from receiving interrupt signals using an interrupt blocking indicator provided by an interrupt table entry stored in a memory operationally connected with the bus attachment device. If the target processor unblocked, 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.