vm_inject_fault
void vm_inject_fault(struct vcpu *vcpu, int vector, int errcode_valid,
vm_inject_fault(vcpu, IDT_UD, 0, 0);
vm_inject_fault(vcpu, IDT_GP, 1, 0);
vm_inject_fault(vcpu, IDT_AC, 1, errcode);
vm_inject_fault(vcpu, IDT_SS, 1, errcode);
vm_inject_fault(vcpu, IDT_PF, 1, error_code);
vm_inject_fault(vcpu, vector, 1, sel);