Invention Application
- Patent Title: CREATING A DYNAMIC ADDRESS TRANSLATION WITH TRANSLATION EXCEPTION QUALIFIERS
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Application No.: US15645819Application Date: 2017-07-10
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Publication No.: US20170315910A1Publication Date: 2017-11-02
- Inventor: Dan F Greiner , Lisa C. Heller , Damian L. Osisek , Erwin Pfeffer
- Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
- Main IPC: G06F12/02
- IPC: G06F12/02 ; G06F3/06 ; G06F12/1009 ; G06F9/455 ; G06F12/10 ; G06F12/109

Abstract:
An enhanced dynamic address translation facility product is created such that, in one embodiment, a virtual address to be translated and an initial origin address of a translation table of the hierarchy of translation tables are obtained. Dynamic address translation of the virtual address proceeds. In response to a translation interruption having occurred during dynamic address translation, bits are stored in a translation exception qualifier (TXQ) field to indicate that the exception was either a host DAT exception having occurred while running a host program or a host DAT exception having occurred while running a guest program. The TXQ is further capable of indicating that the exception was associated with a host virtual address derived from a guest page frame real address or a guest segment frame absolute address. The TXQ is further capable of indicating that a larger or smaller host frame size is preferred to back a guest frame.
Public/Granted literature
- US10241910B2 Creating a dynamic address translation with translation exception qualifiers Public/Granted day:2019-03-26
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