Yocto:将内核模块配方添加到映像,但它不会在启动时加载

Question

出于测试目的,我使用yocto提供的示例配方来演示如何构建内核模块.

SUMMARY = "Example of how to build an external Linux kernel module"
LICENSE = "GPLv2"
LIC_FILES_CHKSUM = "file://COPYING;md5=12f884d2ae1ff87c09e5b7ccc2c4ca7e"

inherit module

PR = "r0"
PV = "0.1"

SRC_URI = "file://Makefile \
           file://hello.c \
           file://COPYING \
          "

S = "${WORKDIR}"

# The inherit of module.bbclass will automatically name module packages with
# "kernel-module-" prefix as required by the oe-core build environment.

该hello.c文件非常简单.

#include <linux/module.h>

int init_module(void)
{
    printk("Hello World!\n");
    return 0;
}

void cleanup_module(void)
{
    printk("Goodbye Cruel World!\n");
}

MODULE_LICENSE("GPL");

现在,我将此模块添加到我的图像配方中.

SUMMARY = "A console-only image that fully supports the target device \
hardware."

IMAGE_FEATURES += "splash package-management"

IMAGE_INSTALL += "test-mod autoconf automake binutils make busybox"

LICENSE = "MIT"

inherit core-image

当我启动映像时,我在/ lib/modules目录中看到测试"hello.ko",但是当我检查时dmesg,我没有看到输出指示内核模块已加载.

当我手动运行insmod时hello.ko,我得到输出.另外,当我跑步时rmmod,我得到输出.

我究竟做错了什么？我需要这个模块在启动时自动加载.

编辑:

这里是输出,验证模块是否在引导时未加载,但它是一个有效的模块.

/ # dmesg | grep "Hello"
/ # insmod hello.ko 
[   68.503689] Hello World!
/ # rmmod hello.ko 
[   72.702035] Goodbye Cruel World!

Answer 1

您应该将模块名称添加到配方中的KERNEL_MODULE_AUTOLOAD,通常如下所示:

KERNEL_MODULE_AUTOLOAD += "hello"

这应该将您的模块名称放在图像上的/etc/modules-load.d/modname.conf中.