On Thu, Jul 07, 2022, Jim Mattson wrote: > RSB-stuffing after VM-exit is only needed for legacy CPUs without > eIBRS. Instead of jumping over the RSB-stuffing sequence on modern > CPUs, just return immediately. > > Note that CPUs that are subject to SpectreRSB attacks need > RSB-stuffing on VM-exit whether or not RETPOLINE is in use as a > SpectreBTB mitigation. However, I am leaving the existing mitigation > strategy alone. > > Signed-off-by: Jim Mattson <jmattson@xxxxxxxxxx> > --- Reviewed-by: Sean Christopherson <seanjc@xxxxxxxxxx>
