Re: [PATCH v2 6/7] kvm: vmx: Defer setting of DR6 until #DB delivery

[Paolo Bonzini <pbonzini@xxxxxxxxxx>]

On 16/10/2018 23:29, Jim Mattson wrote:
> +	} else if (vmcs12->exception_bitmap & (1u << nr)) {
> +		if (nr == DB_VECTOR)
> +			*exit_qual = has_payload ? payload : vcpu->arch.dr6;

Ok to change this last line to

                        if (!has_payload) {
                                payload = vcpu->arch.dr6;
                                payload &= ~(DR6_FIXED_1 | DR6_BT);
                                payload ^= DR6_RTM;
                        }
                        *exit_qual = payload;

in order to keep the current behavior in kvm/queue?

Paolo