qoriq Linux: append the changes in kernel configuration not working properly

[nobelsharanyanj]

Hi,

I like to change the default kernel configuration and I want the changes to be updated on kernel build even after cleansstate

So I generated the kernel configuration difference by

bitbake -c diffconfig virtual/kernel

the above command generated a *.cfg which I copied the files to meta-*/recipies-kernel/linux/files/

Then, I created a *.bbappend files in meta-*/recipies-kernel/linux/

FILESEXTRAPATHS_prepend := "${THISDIR}/files:"

SRC_URI += "file://fragmemt.cfg"@

When I did a bitbake

bitbake -c cleansstate virtual/kernel

WARNING: No recipes available for:

  /home/project/P1010RDB/Source/yocto/QorIQ-SDK-V1.8-20150619-yocto/meta-fsl-ppc/recipes-kernel/linux/linux-qoriq_3.12_config.bbappend

[caryo_brien]

I struggled with this for quite a while, trying to enable the CRYPTO_USER feature.

It is possible to do completely in a private layer.  Assuming you have your own layer

referenced in conf/bblayers.conf (which you should, makes things much easier)...

a) use menuconfig and diffconfig to create a fragment.

b) Create a layer with a linux-qoriq_1_3.12.bbappend  (or other version if yours is different)

c) VERIFY WITH bitbake-layers show-appends that your file is being pulled in

d) In the bbappend dir, save the fragment under files/build  (IMPORTANT) i.e files/build/myfragment.cfg

e) in the bbappend file, add...

FILESEXTRAPATHS_prepend := "${THISDIR}/files:"

SRC_URI += "file://build/myfragment.cfg "

DELTA_KERNEL_DEFCONFIG += " myfragment.cfg "

Note build is in the SRC_URI, not in DELTA_KERNEL_DEFCONFG.  Finding out

where do_configure() actually ran took a bit of effort.

Hope this helps someone...

Cary

[nobelsharanyanj]

Hi Cary,

You are right, build is in the SRC_URI, not in DELTA_KERNEL_DEFCONFG in 1.9 SDK.

but if you look at older version 1.8 SDK, it is DELTA_KERNEL_DEFCONFIG.

Regards

Nobel

[nobelsharanyanj · Accepted solution]

Hi,

I got solution for the above problem.

after successfully modified the kernel configuration then follow the below steps

step 1: bitbake -c diffconfig virtual/kernel

the above command will generate fragment.cfg

step 2: copy the fragment.cfg to source/meta-**/recipes-kernel/linux/linux-qoriq-3.12-config/

step 3: modify the linux-qoriq.inc

line 17: DELTA_KERNEL_DEFCONFIG="${THISDIR}/linux-qoriq-3.12-config/*"

make sure there should not be any space in the above line

Now bitbake cleansstate and bitbake again.

Note:

Someone patch this to source please.

Thanks

Nobel