On 23/05/2018 22:40, Boris Ostrovsky wrote:
> Looking at vmx_cpuid_policy_changed():
>
>
>    if ( cp->feat.ibrsb )
>         vmx_clear_msr_intercept(v, MSR_SPEC_CTRL, VMX_MSR_RW);
>     else
>         vmx_set_msr_intercept(v, MSR_SPEC_CTRL, VMX_MSR_RW);
>
>
> Is there a reason why we are not checking cp->feat.ssbd as well?

Yes.  Read the final hunk of
http://xenbits.xen.org/gitweb/?p=xen.git;a=commitdiff;h=9df52a25e0e95a0b9971aa2fc26c5c6a5cbdf4ef

~Andrew

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