Emulated translation unit using a management processor
US9959214B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2015 |
| Grant date | May 1, 2018 |
| Priority date | — |
| Expiry date | Dec 29, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/601
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An emulated input/output memory management unit (IOMMU) includes a management processor to perform page table translation in software. The emulated IOMMU can also include a hardware input/output translation lookaside buffer (IOTLB) to store translations between virtual addresses and physical memory addresses. When a translation from a virtual address to a physical address is not found in the IOTLB for an I/O request, the translation can be generated by the management processor using page tables from a memory and can be stored in the IOTLB. Some embodiments can be used to emulate interrupt translation service for message based interrupts for an interrupt controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.