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  1. JDK
  2. JDK-8253015

Aarch64: Move linux code out from generic CPU feature detection

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    • b18
    • aarch64
    • linux

    Backports

      Description

        https://mail.openjdk.java.net/pipermail/aarch64-port-dev/2020-September/009690.html

        CPU feature detection in cpu/aarch64 assumes running on Linux. As a preparation for support of non-Linux AArch64 systems (i.e. windows-aarch64), Linux-specific code should go to os_cpu/linux_aarch64/vm_version_xxx.cpp.

        There is also a chance to clean up a bit:
        1. CPU features detection stub can be optimized
        2. dcpop feature is parsed from /proc/cpuinfo, although it is also available in HWCAP vector.
        3. AArch64 Feature_Flags implicitly mirrors of Linux HWCAP

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            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8275159 Aarch64: Move linux code out from generic CPU feature detection

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8277735 Aarch64: Move linux code out from generic CPU feature detection

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8289191 Aarch64: Move linux code out from generic CPU feature detection

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8255975 Fix AArch64 OpenJDK build failure with gcc-5

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8255716 AArch64: Regression: JVM crashes if manually offline a core

            • P3 - Major loss of function.
            • Resolved
            links to

            Commit Commit openjdk/jdk11u-dev/d336b240

            Commit Commit openjdk/jdk/ec9bee68

            Review Review openjdk/jdk11u-dev/299

            Review Review openjdk/jdk/154

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                akozlov Anton Kozlov
                akozlov Anton Kozlov
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                  Created:
                  Updated:
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