On Wed, May 06, 2020 at 07:10:32AM -0400, Paolo Bonzini wrote: > kvm_x86_ops.set_dr6 is only ever called with vcpu->arch.dr6 as the > second argument, and for both SVM and VMX the VMCB value is kept > synchronized with vcpu->arch.dr6 on #DB; we can therefore remove the > read accessor. > > For the write accessor we can avoid the retpoline penalty on Intel > by accepting a NULL value and just skipping the call in that case. > > Suggested-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx> > Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> (I think this patch and the previous one seem to be the same as the previous version. Anyway...) Reviewed-by: Peter Xu <peterx@xxxxxxxxxx> -- Peter Xu
