Forums - How to add kernel boot parameter on RB5?

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How to add kernel boot parameter on RB5?
sangmin.kim
Join Date: 10 Dec 21
Posts: 1
Posted: Thu, 2021-12-16 21:39
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Hi,

I wanna add some kernel boot parameters( about isolcpus=) on RB5

I wanna do or know a similar method of isolcpus.

How can I do?

 

And How can I download qrb5165.UBUN source code?

I already joined chipcode but there is no qrb5165.UBUN or qrb516.LINUX.

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Re: How to add kernel boot parameter on RB5?
mita.rathod
Join Date: 17 Sep 18
Posts: 59
Posted: Thu, 2022-01-13 10:39
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Dera Customer,

/SDX55_apps/apps_proc/poky/meta-qti-bsp/conf/machine/sdxprairie.conf
KERNEL_CMD_PARAMS = "**** isolcpus=1,3"

for download source code please contact your TAM

Thanks

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Re: How to add kernel boot parameter on RB5?
avik.de
Join Date: 26 Oct 23
Posts: 3
Posted: Sun, 2023-12-03 14:34
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Hi, I'm trying to do the same thing as the OP, but I am not quite able to follow the instructions of @mita.rathod.

Does that path refer to something before the kernel is built? If so, I am using the ThunderComm SDK Manager, and with Docker, I logged into the shell before the image is build, but could not find that path:

This is what I see:

root@fa2d4c1ff54b:~/QRB5165.LU2.0_20230808.1511_debug# ls
build-system.sh deb_cache imgparser packages rootfs sparse.log utils
cdt full_build non_hlos repack.log rootfs_base ubuntu-rootfs

On the other hand, if this can be done after the kernel is built, that would be even better, but I don't see that path in the Ubuntu image. I've looked for /etc/default/grub and other similar locations.

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Re: How to add kernel boot parameter on RB5?
avik.de
Join Date: 26 Oct 23
Posts: 3
Posted: Thu, 2023-12-07 07:05
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I think I understand that mita.rathod was referring to a Yocto build, i.e. building a new image.

Is there no way to accomplish sending kernel command line parameters in an existing image? I'm using a Thudercomm image LU2.0 (but could use a LU1.0 if that makes it easier).

Thanks for any guidance.

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