Detection of alteration of storage keys used to protect memory

    公开(公告)号:US11209992B2

    公开(公告)日:2021-12-28

    申请号:US17032144

    申请日:2020-09-25

    IPC分类号: G06F3/06

    摘要: Detection of alteration of storage keys used to protect memory includes determining whether a storage key alteration event has occurred within a processor of a computing environment. The determining includes checking whether one or more selected fields of a storage key have been updated. The storage key is associated with a block of memory and controls access to the block of memory. Based on the checking indicating that the one or more selected fields of the storage key have been updated, a storage key alteration event has been detected. Based on determining the storage key alteration event has occurred, a notification is provided.

    Time-slice-instrumentation facility

    公开(公告)号:US10303575B2

    公开(公告)日:2019-05-28

    申请号:US15402412

    申请日:2017-01-10

    摘要: A facility is provided for collecting time-slice-instrumentation information during processing unit execution. The facility counts, at least in part, occurrence of a specified processing unit event during a time-slice of processing unit execution. The counted events occurring during a first interval of execution and a second interval of execution of the time-slice are retained. The first interval of execution is earlier in the time-slice than the second interval of execution, and the counted events facilitate adjusting performance of the processing unit. In an embodiment, the time-slice is a contiguous period of time of processing unit execution, and the specified processing unit event includes a cache event. The processing unit may interleave processing of multiple different units of work across multiple contiguous time-slices, and during a single time-slice, a single unit of work of the multiple different units of work is processed by the processing unit.

    DETECTION OF ALTERATION OF STORAGE KEYS USED TO PROTECT MEMORY

    公开(公告)号:US20200272341A1

    公开(公告)日:2020-08-27

    申请号:US16283989

    申请日:2019-02-25

    IPC分类号: G06F3/06

    摘要: Detection of alteration of storage keys used to protect memory includes determining whether a storage key alteration event has occurred within a processor of a computing environment. The determining includes checking whether one or more selected fields of a storage key have been updated. The storage key is associated with a block of memory and controls access to the block of memory. Based on the checking indicating that the one or more selected fields of the storage key have been updated, a storage key alteration event has been detected. Based on determining the storage key alteration event has occurred, a notification is provided.