def generate_host_passthrough(self, vcpu_num):
cpu = ET.Element('<STR_LIT>', mode='<STR_LIT>')<EOL>cpu.append(self.generate_topology(vcpu_num))<EOL>if vcpu_num > <NUM_LIT:1>:<EOL><INDENT>cpu.append(self.generate_numa(vcpu_num))<EOL><DEDENT>return cpu<EOL>
Generate host-passthrough XML cpu node

Args:
    vcpu_num(str): number of virtual CPUs

Returns:
    lxml.etree.Element: CPU XML node