Integrated: 8367137: RISC-V: Detect Zicboz block size via hwprobe

[Dingli Zhang]

On Tue, 9 Sep 2025 03:14:42 GMT, Dingli Zhang <dzhang at openjdk.org> wrote:

> Hi,
> Can you help to review this patch? Thanks!
> 
> We can extends RISC-V hwprobe support to include `RISCV_HWPROBE_KEY_ZICBOZ_BLOCK_SIZE`.
> The probed value is recorded in VM_Version::zicboz_block_size and then used to set the zicboz_block_size.
> This ensures correct usage of the Zicboz extension, as block zeroing instructions operate on cache-line granularity.
> 
> FYI: https://docs.kernel.org/arch/riscv/hwprobe.html

This pull request has now been integrated.

Changeset: 5abd1842
Author:    Dingli Zhang <dzhang at openjdk.org>
Committer: Fei Yang <fyang at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/5abd18426d64f878ca45f9d36ca270be17a7760f
Stats:     60 lines in 5 files changed: 10 ins; 0 del; 50 mod

8367137: RISC-V: Detect Zicboz block size via hwprobe

Reviewed-by: fyang, mli, rehn

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PR: https://git.openjdk.org/jdk/pull/27155