On Mon, Sep 27, 2021 at 01:13:26PM +0200, Paolo Bonzini wrote: > Because the guest kernel needs to know which MSRs to write when you touch > the SSBD prctl, so that PSFD is properly disabled *inside the guest*. It already knows which - the same one which disables SSB. PSF is disabled *together* with SSB, for now... -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette