qemu_kvm_start_vcpu --> qemu_init_vcpu --> x86_cpu_realizefn --> x86_cpu_common_class_init --> class_init --> x86_cpu_type_info
qemu_kvm_start_vcpu --> qemu_init_vcpu --> x86_cpu_realizefn --> x86_cpu_common_class_init --> class_init --> x86_cpu_type_info