RFR: 8329031: CPUID feature detection for Advanced Performance Extensions (Intel® APX) [v4]

[Vladimir Kozlov]

On Sat, 8 Jun 2024 04:16:24 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

>> Summary of changes include with the patch:-
>> 
>> 1) CPUID based feature detection check for Intel APX extension (https://www.intel.com/content/www/us/en/developer/articles/technical/advanced-performance-extensions-apx.html)
>> 2) Validation during VM initialization for extended GPRs state save / restoration by OS across context switches of java application threads executing JIT compiled code with new APX ISA.
>> 
>> Kindly review and share your feedback.
>> 
>> Best Regards,
>> Jatin
>
> Jatin Bhateja has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Lazy restored state comparison after OS signal handling.

Good. Let me test it.

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PR Review: https://git.openjdk.org/jdk/pull/18562#pullrequestreview-2105876232