Transparent conversion of common virtual storage

US10705983B1 · kind B1 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Elpida Tzortzatos · Lagrangeville, US
• Michael G. Spiegel · Rochester, US
• Karl D. Schmitz · Poughkeepsie, US
• Steven M. Partlow · Beacon, US
• Harris M. Morgenstern · Wappingers Falls, US
• David Hom · Poughkeepsie, US
• Peter A. Fatzinger · Poughkeepsie, US

Key dates

• Filing date: Mar 1, 2019
• Grant date: Jul 7, 2020
• Expiry date: Mar 1, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F2212/657
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

Embodiments are provided for implementing a transparent conversion of common virtual storage requests to storage with limited access. Embodiments include providing a storage manager configured to perform address translation for requests, providing a data address translation (DAT) structure configured to connect a higher-level DAT table to a lower-level DAT table, and creating the DAT structure based on a request from a process. Embodiments also include responsive to receiving a storage request, performing a DAT fault process based on validating user credentials associated with an entry of the higher-level DAT table corresponding to the storage request, and responsive to the validation, updating the higher-level DAT table entry to allow access to the restricted-use portion of the common virtual storage, and otherwise, returning a DAT fault for the higher-level DAT table entry.