Re: [PATCH] KVM: svm: support single stepping over emulated instructions

[Paolo Bonzini]

> We already have b742c1e6e79d ("KVM: SVM: handle singlestep exception
> when skipping emulated instructions"), so the only applicable part of
> this patch is

Doh. :)

> > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> > index 0e846f0cb83b..931ba449456e 100644
> > --- a/arch/x86/kvm/x86.c
> > +++ b/arch/x86/kvm/x86.c
> > @@ -5548,6 +5548,7 @@ static void kvm_vcpu_do_singlestep(struct kvm_vcpu
> > *vcpu, int *r)
> >  		 */
> >  		vcpu->arch.dr6 &= ~15;
> >  		vcpu->arch.dr6 |= DR6_BS | DR6_RTM;
> > +		kvm_update_dr6(vcpu);
> >  		kvm_queue_exception(vcpu, DB_VECTOR);
> >  	}
> >  }
> 
> which makes sense.  And shouldn't we do the same for
> kvm_vcpu_check_breakpoint()?

Yes, will send v2.

Paolo