Integrated: 8367098: RISC-V: sync CPU features with related JVM flags for dependant ones

[Hamlin Li]

On Mon, 8 Sep 2025 12:15:31 GMT, Hamlin Li <mli at openjdk.org> wrote:

> Hi,
> Can you help to review this patch?
> 
> some extensions depends on another one, for example, zvbb depends on rvv.
> That means if rvv is disabled or not supported by the CPU, UseZvbb should return false, and zvbb should not appear in cpu string.
> But the currently, the cpu string contains zvbb even if rvv is disabled, which is not right.
> This needs to be fixed.
> 
> Thanks
> 
> before fix, output for `-XX-UseRVV -Xlog:cpu*=debug`
> 
> [0.064s][info ][os,cpu] CPU: total 32 (initial active 32) qemu rv64 rvi rvm rva rvf rvd rvc rvv zicbom zicboz zicbop zba zbb zbs zbkb zcb zfa zfh zfhmin zicsr zifencei zic64b ztso zacas zvbb zvbc zvfh zicond
> 
> 
> after fix, output for `-XX-UseRVV -Xlog:cpu*=debug`
> 
> [0.065s][info ][os,cpu] CPU: total 32 (initial active 32) qemu rv64 rvi rvm rva rvf rvd rvc zicbom zicboz zicbop zba zbb zbs zbkb zcb zfa zfh zfhmin zicsr zifencei zic64b ztso zacas zicond

This pull request has now been integrated.

Changeset: f51e442b
Author:    Hamlin Li <mli at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/f51e442b0e26d0e9ebb6ec0da9584ba4f548322c
Stats:     21 lines in 1 file changed: 2 ins; 0 del; 19 mod

8367098: RISC-V: sync CPU features with related JVM flags for dependant ones

Reviewed-by: fyang

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PR: https://git.openjdk.org/jdk/pull/27142