VM_REG_GUEST_DR2
error = vm_set_register(vcpu, VM_REG_GUEST_DR2, dr2);
error = vm_get_register(vcpu, VM_REG_GUEST_DR2, &dr2);
VM_REG_GUEST_DR2, /* VMM_REG_DR2 */
case VM_REG_GUEST_DR2:
case VM_REG_GUEST_DR2:
VM_REG_GUEST_DR2,