RFR: 8367137: RISC-V: Detect Zicboz block size via hwprobe [v3]
Dingli Zhang
dzhang at openjdk.org
Tue Sep 9 08:26:43 UTC 2025
> 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 global CacheLineSize.
> 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
Dingli Zhang has updated the pull request incrementally with one additional commit since the last revision:
fix some assert
-------------
Changes:
- all: https://git.openjdk.org/jdk/pull/27155/files
- new: https://git.openjdk.org/jdk/pull/27155/files/00929922..bcb0453b
Webrevs:
- full: https://webrevs.openjdk.org/?repo=jdk&pr=27155&range=02
- incr: https://webrevs.openjdk.org/?repo=jdk&pr=27155&range=01-02
Stats: 3 lines in 1 file changed: 0 ins; 1 del; 2 mod
Patch: https://git.openjdk.org/jdk/pull/27155.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/27155/head:pull/27155
PR: https://git.openjdk.org/jdk/pull/27155
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