Invention Grant
- Patent Title: Dynamic address translation with translation exception qualifier
- Patent Title (中): 动态地址转换与翻译异常限定符
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Application No.: US12037268Application Date: 2008-02-26
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Publication No.: US08095773B2Publication Date: 2012-01-10
- Inventor: Dan F. Greiner , Lisa C. Heller , Damian L. Osisek , Erwin Pfeffer
- Applicant: Dan F. Greiner , Lisa C. Heller , Damian L. Osisek , Erwin Pfeffer
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Fleit Gibbons Gutman Bongini & Bianco
- Agent John E. Campbell
- Main IPC: G06F12/10
- IPC: G06F12/10

Abstract:
What is provided is an enhanced dynamic address translation facility. 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
- US20090216992A1 DYNAMIC ADDRESS TRANSLATION WITH TRANSLATION EXCEPTION QUALIFIER Public/Granted day:2009-08-27
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