RFR: 8327058: RISC-V: make Zcb experimental

[Guoxiong Li]

On Thu, 29 Feb 2024 17:31:52 GMT, Hamlin Li <mli at openjdk.org> wrote:

> Hi,
> Can you review the patch to add a flag for Zcb extension to enable user to control it?
> Thanks.
> 
> As discussed in [1], it's good to give a flag to control Zcb, and currently it's good to make it experimental.
> 
> [1] https://github.com/openjdk/jdk/pull/17698#discussion_r1505364098

Generally, a new option needs a CSR. But I notice that many options added in riscv-port didn't have their CSRs, so I would be OK without CSR.

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Marked as reviewed by gli (Committer).

PR Review: https://git.openjdk.org/jdk/pull/18070#pullrequestreview-1910835349