Re: [PATCH] KVM: x86: Expose Predictive Store Forwarding Disable

From: Borislav Petkov
Date: Mon Sep 27 2021 - 08:06:55 EST

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...