RFR: 8339771: RISC-V: Reduce icache flushes [v5]

[Robbin Ehn]

On Fri, 20 Sep 2024 07:26:02 GMT, Hamlin Li <mli at openjdk.org> wrote:

>> Robbin Ehn has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains six additional commits since the last revision:
>> 
>>  - Merge branch 'master' into cmodx-fence
>>  - Comment, remove not needed fence
>>  - Merge branch 'master' into cmodx-fence
>>  - Comment, moved init after feature enabling
>>  - Fixed ws
>>  - Draft
>
> Marked as reviewed by mli (Reviewer).

Thanks @Hamlin-Li, @luhenry and @RealFYang !
I'll let this sit until next week, doing some extras test runs.

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PR Comment: https://git.openjdk.org/jdk/pull/20913#issuecomment-2363054069