[libvirt] How can I build a virtual machine that connected with TLS and VNC password at the same time ?

[c90006226]

Hi, all,
         I am using libvirt to start a virtual machine, and I want to  
use TLS and VNC password.
         How can I  build a virtual machine that  connected with TLS 
and  VNC password at the same time?
who can  give me  an xml example?
          thks!