Messages in this thread | | | Date | Fri, 26 Aug 2022 12:10:44 +0200 | Subject | Re: [PATCH] KVM: x86: Expose Predictive Store Forwarding Disable | From | Paolo Bonzini <> |
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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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