To Build the Real-Time Kernel

[awesomesaf]

https://docs.nvidia.com/jetson/archives/r35.3.1/DeveloperGuide/text/SD/Kernel/KernelCustomization.html#preparing-to-build-external-kernel-modules

I am trying to build the real time kernel and

I cant seem to understand the second step
2. Build the kernel modules:

$ cd $ sudo make ARCH=arm64 O=$TEGRA_KERNEL_OUT modules_install INSTALL_MOD_PATH=/Linux_for_Tegra/rootfs/

Make sure there is a new folder with -rt63- in its name under Linux_for_Tegra/usr/lib/modules/ .

Further i tried to use the following command

sudo make ARCH=arm64 O=$TEGRA_KERNEL_OUT modules_install INSTALL_MOD_PATH=/home/dnc/Downloads/ver35.3/Jetson_Linux_R35.3.1_aarch64/Linux_for_Tegra/rootfs/

Here is the log of that command
make[1]: Entering directory ‘/home/dnc/jetson-kernel’

ERROR: Kernel configuration is invalid.
include/generated/autoconf.h or include/config/auto.conf are missing.
Run ‘make oldconfig && make prepare’ on kernel src to fix it.

/home/dnc/Downloads/ver35.3/Jetson_Linux_R35.3.1_aarch64/Linux_for_Tegra/rootfs/usr/src/linux-headers-5.10.104-tegra-ubuntu20.04_aarch64/kernel-5.10/Makefile:675: include/config/auto.conf: No such file or directory
make[1]: *** [/home/dnc/Downloads/ver35.3/Jetson_Linux_R35.3.1_aarch64/Linux_for_Tegra/rootfs/usr/src/linux-headers-5.10.104-tegra-ubuntu20.04_aarch64/kernel-5.10/Makefile:750: include/config/auto.conf] Error 1
make[1]: Leaving directory ‘/home/dnc/jetson-kernel’
make: *** [Makefile:213: __sub-make] Error 2

Additionally i have the kconfig and kbuild file

Also the kconfig file is present not through the tegra file as indicated in the picture

Can you help me out ?

[DaneLLL]

Hi,
We would suggest use Jetpack 5.1.3 or 6.0GA. You may check the latest steps in developer guide:

Kernel — NVIDIA Jetson Linux Developer Guide 1 documentation
Kernel Customization — NVIDIA Jetson Linux Developer Guide 1 documentation

[awesomesaf]

I am in the process of implementing the ver 35.3.1
There are some issues with the latest version .
Let me know if this command could be explained

$ cd $ sudo make ARCH=arm64 O=$TEGRA_KERNEL_OUT modules_install INSTALL_MOD_PATH=/Linux_for_Tegra/rootfs/

Also there is the path called drivers/video/tegra/Kconfig
which is missing although i have installed the files

here is the log file

~/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10$ find /home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/ -name Kconfig | grep tegra
/home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/arch/arm/mach-tegra/Kconfig
/home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/arch/arm/mach-integrator/Kconfig
/home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/drivers/memory/tegra/Kconfig
/home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/drivers/gpu/drm/tegra/Kconfig
/home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/drivers/staging/media/tegra-vde/Kconfig
/home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/drivers/staging/media/tegra-video/Kconfig
/home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/drivers/soc/tegra/Kconfig
/home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/drivers/phy/tegra/Kconfig
/home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/drivers/clk/tegra/Kconfig
/home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/drivers/firmware/tegra/Kconfig
/home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/drivers/pinctrl/tegra/Kconfig
/home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/drivers/thermal/tegra/Kconfig
/home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/drivers/reset/tegra/Kconfig
/home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/sound/soc/tegra/Kconfig

And also help me resolve the above issues and the problems that i had stated earlier ?

[linuxdev]

Did you set the CROSS_COMPILE environment variable?

[awesomesaf]

@linuxdev

CROSS_COMPILE

Yes Here it is . I had executed teh earlier steps mentioned as well . As stated earlier i am trying to build the rt kernel itself

ERROR: Kernel configuration is invalid.
include/generated/autoconf.h or include/config/auto.conf are missing.
Run ‘make oldconfig && make prepare’ on kernel src to fix it.

/home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/Makefile:675: include/config/auto.conf: No such file or directory
make[1]: *** [/home/dnc/Downloads/Jetson_Linux_R35.1.0_aarch64/Linux_for_Tegra/sources/kernel/kernel-5.10/Makefile:750: include/config/auto.conf] Error 1
make[1]: Leaving directory ‘/home/dnc/Desktop/pub/public_sources/Linux_for_Tegra/source/public/kernel_src/kernel/kernel-5.10/out’
make: *** [Makefile:213: __sub-make] Error 2

This is the error that comes when i try executing the command

sudo make ARCH=arm64 O=$TEGRA_KERNEL_OUT modules_install INSTALL_MOD_PATH=/Linux_for_Tegra/rootfs/

[DaneLLL]

Hi,
Please ensure version of the packages is identical. Somehow R35.3.1 and R35.1.0 are shown in the comments. You may try clean download of R35.5.0(Jetpack 5.1.3).