Invention Grant
- Patent Title: Transparent conversion of common virtual storage
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Application No.: US16290241Application Date: 2019-03-01
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Publication No.: US10705983B1Publication Date: 2020-07-07
- Inventor: Elpida Tzortzatos , Michael Gary Spiegel , Karl David Schmitz , Steven Partlow , Harris M. Morgenstern , David Hom , Peter Fatzinger
- Applicant: International Business Machines Corporation
- Applicant Address: US NY Armonk
- Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
- Current Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
- Current Assignee Address: US NY Armonk
- Agency: Cantor Colburn LLP
- Agent Teddi Maranzano
- Main IPC: G06F12/10
- IPC: G06F12/10 ; G06F12/14

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.
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