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
