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SubjectRe: [PATCH] KVM: x86: Expose Predictive Store Forwarding Disable
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On 8/24/22 19:16, Jim Mattson wrote:
>> Borislav asked to not show psfd in /proc/cpuinfo, because Linux had
>> decided not to control PSF separately; instead it just piggybacked
>> on SSBD which should disable PSF as well. Honestly I disagree but
>> it's not my area of maintenance.
>
> Do we expose PSFD in KVM for the use of another popular guest OS?

Yes, that was the purpose of this patch and we expose it via
MSR_IA32_SPEC_CTRL (the only validation that KVM does is in
kvm_spec_ctrl_test_value(), so it does not need to know more about the
specific bits).

Paolo

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