Emulating a line-based interrupt transaction in response to a message signaled interrupt
US7979619B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2008 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | May 6, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/45533
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods, systems, apparatuses and program products are disclosed for managing interrupt services in hypervisor and hypervisor-related environments in Message Signaled Interrupts are emulated as other type(s) of interrupt.According to an aspect of the present invention, a method of executing a program includes receiving a MSI (message signaled interrupt). Responsively, a virtual interrupt is generated and an ISR (interrupt service routine) is invoked that handles a line-based virtual interrupt transaction. A surrogate or virtual peripheral device status may also be provided and may be associated with the virtual interrupt. A single device interrupt event may, in certain circumstances, be serviced both as a line-based interrupt and also as an MSI, or as either responsive to run-time context.Embodiments of the present invention enable superior tradeoffs in regards to the interrupt sharing to a greater and more flexible extent than with previous implementations. Moreover, it makes possible interrupt sharing using an ISR that was not expressly designed for interrupt sharing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.