On Tue, Aug 28, 2018 at 9:04 AM, Sean Christopherson
<sean.j.christopherson@xxxxxxxxx> wrote:
> Do not unconditionally call clear_atomic_switch_msr() when updating
> EFER. This adds up to four unnecessary VMWrites in the case where
> guest_efer != host_efer, e.g. if the load_on_{entry,exit} bits were
> already set.
>
> Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
Reviewed-by: Jim Mattson <jmattson@xxxxxxxxxx>
