RFR: 8374926: EnableX86ECoreOpts was not enabled on some hybrid CPU [v3]

[Yasumasa Suenaga]

On Fri, 23 Jan 2026 13:54:39 GMT, Volodymyr Paprotski <vpaprotski at openjdk.org> wrote:

>> @vpaprotsk 
>>> I do think adding hybrid check might be a good idea, at least for now. I still need to find a way to detect 'is ecore only'. And if I could detect only the parts that actually need this emulation. (Though maybe leave both of those to me for another PR..
>> 
>> Do you mean this PR should add to check hybrid flag only, without checking leaf 1Ah?
>> If so, I will revert the merge for leaf 1Ah, and will add model ID for CWF.
>
>> Do you mean this PR should add to check hybrid flag only, without checking leaf 1Ah? If so, I will revert the merge for leaf 1Ah, and will add model ID for CWF.
> 
> I would prefer that, at least for now/this PR.. keep the existing model checks and add `supports_hybrid()`. (The atom core might be a good idea, not sure. Would need some spelunking)

@vpaprotsk I updated this PR to check hybrid flag and model ID for SRF, CWF. Could you review?
It works on Core Ultra 5 225U at least.

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PR Comment: https://git.openjdk.org/jdk/pull/29149#issuecomment-3793556685