发明申请
- 专利标题: Dynamic Address Translation With Translation Exception Qualifier
- 专利标题(中): 动态地址转换与翻译异常限定符
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申请号: US13312079申请日: 2011-12-06
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公开(公告)号: US20120084488A1公开(公告)日: 2012-04-05
- 发明人: Dan F. Greiner , Lisa C. Heller , Damian L. Osisek , Erwin Pfeffer
- 申请人: Dan F. Greiner , Lisa C. Heller , Damian L. Osisek , Erwin Pfeffer
- 申请人地址: US NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: US NY Armonk
- 主分类号: G06F12/10
- IPC分类号: G06F12/10
摘要:
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.
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