Zone-SDID mapping scheme for TLB purges

US10929312B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Uwe Brandt · Eppelheim, DE
• Ute Gaertner · Schenefeld, DE
• Lisa C. Heller · Rhinebeck, US
• Markus Helms · Eppelheim, DE
• Christian Jacobi · West Park, US
• Thomas Koehler · Holzgerlingen, DE
• Frank Lehnert · Weil im Schönbuch, DE
• Jennifer A. Navarro · Poughkeepsie, US

Key dates

• Filing date: May 7, 2019
• Grant date: Feb 23, 2021
• Expiry date: May 7, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02D10/00
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

Embodiments include techniques for using a zone-SDID mapping for translation lookaside buffer (TLB) purges, the techniques include receiving a zone purge request, including zone attribute information, and searching for matching zone attribute information in a zone register using the zone purge request. The techniques also include computing, based at least in part on the search, a state descriptor identifier (SDID) vector for each matching zone of the zone register, and reading TLB entries referenced in the zone purge request. The techniques include comparing an SDID of the TLB entry against an SDID specified in the SDID vector, and purging the TLB entries based on the comparison.