Re: [PATCH 1/4] target/i386: Introduce SierraForest-v2 model

[Pawan Gupta]

On Tue, Jan 21, 2025 at 10:06:47AM +0800, Tao Su wrote:
> Update SierraForest CPU model to add LAM, 4 bits indicating certain bits
> of IA32_SPEC_CTR are supported(intel-psfd, ipred-ctrl, rrsba-ctrl,
> bhi-ctrl) and the missing features(ss, tsc-adjust, cldemote, movdiri,
> movdir64b)
> 
> Also add GDS-NO and RFDS-NO to indicate the related vulnerabilities are
> mitigated in stepping 3.

Does this only apply to stepping 3? I don't think Sierra Forest was ever
vulnerable to GDS and RFDS [1].

There are many other vulnerabilities that Sierra Forest is not vulnerable to,
is it really necessary to add the *_NO bits to CPU definitions?

[1] 
https://www.intel.com/content/www/us/en/developer/topic-technology/software-security-guidance/processors-affected-consolidated-product-cpu-model.html