[jdk25u] RFR: 8367137: RISC-V: Detect Zicboz block size via hwprobe

[Dingli Zhang]

On Fri, 12 Sep 2025 06:14:31 GMT, Dingli Zhang <dzhang at openjdk.org> wrote:

> Hi all,
> 
> This pull request contains a backport of commit [5abd1842](https://github.com/openjdk/jdk/commit/5abd18426d64f878ca45f9d36ca270be17a7760f) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Dingli Zhang on 12 Sep 2025 and was reviewed by Fei Yang, Hamlin Li and Robbin Ehn.
> 
> Thanks!

PS: hotspot:tier1 tested on OPi RV2 with UseZicboz (running kernel 6.15.2-spacemit-k1)

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PR Comment: https://git.openjdk.org/jdk25u/pull/186#issuecomment-3287361080