[jdk17u-dev] RFR: 8309258: RISC-V: Add riscv_hwprobe syscall

Thu Nov 2 14:05:31 UTC 2023

Hi, please consider.

RISC-V has many extensions and it's not feasible to set them correctly on the command line for users.
There is no instruction to get the cpu, such as cpuid on x86.

Still running tests, it will take a while.

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Commit messages:
 - Backport 31b6fd775f1c4f2841d9a52ad5f275ad446ee661

Changes: https://git.openjdk.org/jdk17u-dev/pull/1942/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1942&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8309258
  Stats: 584 lines in 5 files changed: 474 ins; 56 del; 54 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1942.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1942/head:pull/1942

PR: https://git.openjdk.org/jdk17u-dev/pull/1942