Compare and delay instructions
    43.
    发明专利

    公开(公告)号:GB2539601A

    公开(公告)日:2016-12-21

    申请号:GB201617085

    申请日:2015-02-23

    Applicant: IBM

    Abstract: A delay facility is provided in which program execution may be delayed until a predefined event occurs, such as a comparison of memory locations results in a true condition, a timeout is reached, an interruption is made pending or another condition exists. The delay facility includes one or more compare and delay machine instructions used to delay execution. The one or more compare and delay instructions may include a 32-bit compare and delay (CAD) instruction and a 64-bit compare and delay (CADG) instruction.

    Detection of alteration of storage keys used to protect memory

    公开(公告)号:GB2596007B

    公开(公告)日:2022-09-07

    申请号:GB202113006

    申请日:2020-02-14

    Applicant: IBM

    Abstract: 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.

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