RFR: 8345289: RISC-V: enable some extensions with hwprobe

[Ludovic Henry]

On Mon, 2 Dec 2024 09:55:22 GMT, Hamlin Li <mli at openjdk.org> wrote:

> Hi,
> Can you help to review the patch?
> Currently, some extensions are not enable automatically with hwprobe, this is to enable them with hwprobe result.
> 
> Thanks!
> 
> Tests running so far so good.

src/hotspot/os_cpu/linux_riscv/riscv_hwprobe.cpp line 184:

> 182:     VM_Version::ext_Zfh.enable_feature();
> 183:   }
> 184:   if (is_set(RISCV_HWPROBE_KEY_IMA_EXT_0, RISCV_HWPROBE_EXT_ZICBOZ)) {

Could you add Zicbop and Zicbom as well? Are they even supported/defined in the kernel headers?

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PR Review Comment: https://git.openjdk.org/jdk/pull/22474#discussion_r1865565589