[Kernel Customization] How to Install Kernel Header & Modules

Autonomous Machines Jetson & Embedded Systems Jetson AGX Orin
1

I have Jetson Orin Dev Kit (64GB). Have install Jetpack6.0 with rel36.

How to install kernel header & modules /lib/moduels/ of customize kernel where have
enable few Linux framework using config flag.
I would like to install header’s & modules.

Note, updating /boot/Image & copying /lib/moduels wont help to compile
own driver (.ko) locally hence needs latest kernel headers from customize kernel.

Please advise if any one has tried.

3

Hi,

Here you can see instructions on how to cross-compile and install L4T kernel,

https://docs.nvidia.com/jetson/archives/l4t-archived/l4t-3261/index.html#page/Tegra%20Linux%20Driver%20Package%20Development%20Guide/kernel_custom.html

5

Hi,

Can you please elaborate more about this?
You can try building kernel natively on the target, and use the same kernel source to build your own drivers.

6

Hello,

I am able to build natively own kernel.
When trying to build modules, it looks for kernel header which is not the same I build the kernel.
x@ubuntu:~/Downloads/Linux_for_Tegra/source$ sudo make ARCH=arm64 O=kernel_out/ modules_install INSTALL_MOD_PATH=/home/xx/Downloads/Linux_for_Tegra/rootfs/

make[2]: *** [/usr/src/linux-headers-5.15.122-tegra-ubuntu22.04_aarch64/3rdparty/canonical/linux-jammy/kernel-source/Makefile:1842: modules_install] Error 1

Question is how to install locally build the kernel (including headers & modules) ?

7

Why are you setting INSTALL_MOD_PATH like this?

8

I build kernel natively, ran below command to install modules & headers, copy kernel boot image into /boot/ directory.

make modules -j4
make modules_install
sudo make headers_install

Rebooted the kernel.

Now I try to build my .ko & install, it says
insmod: ERROR: could not insert module kernel/kernel-jammy-src/drivers/x/x/x/x.ko: Unknown symbol in module

If steps found incorrect, please share the right way of doing it.

Thanks.

9

Can you please make a summary of every steps you are trying?
I just don’t know what you are doing now.

10

Be sure to include whether or not you set “CONFIG_LOCALVERSION” to “-tegra” or not. Include the result of “uname -r”, and what you see from “ls /lib/modules/”.

12

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