Determination of one or more partitionable endpoints affected by an I/O message
US9569392B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2012 |
| Grant date | Feb 14, 2017 |
| Priority date | — |
| Expiry date | Apr 16, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2213/0058
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data processing system includes a processor core, a system memory including a first data structure including a plurality of entries mapping requester identifiers (IDs) to partitionable endpoint (PE) numbers, and an input/output (I/O) subsystem including a plurality of PEs each having an associated PE number, where each of the plurality of PEs including one or more requesters each having a respective requester ID. An I/O host bridge, responsive to receiving an I/O message including a requester ID and an address, determines a PE number by reference to a first entry from the first data structure, and responsive to determining the PE number, accesses a second entry of the second data structure utilizing the PE number as an index and validates the address by reference to the accessed entry in the second data structure. The I/O host bridge, responsive to successful validation, provides a service indicated by the I/O message.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.