编译第一个驱动程序时出现这个问题，怎么解决

ST STM32MP157_PRO
1

hello_drv: module verification failed: signature and/or required key missing - tainting kernel
/home/book/nfs_rootfs/01_hello_drv/hello_drv.c hello_init line 70
找不到 /dev/h

2

insmod -f 强制安装试试看呢