[meta-xilinx] Warnings that items did not make it into the final kernel configuration

[Mike Looijmans]

On 05-09-16 08:05, Mike Looijmans wrote:
> On 02-09-16 12:42, Mike Looijmans wrote:
>  > On 02-09-16 12:12, Nathan Rossi wrote:
>  >  > On Fri, Sep 2, 2016 at 8:02 PM, Mike Looijmans <mike.looijmans at topic.nl>
> wrote:
>  >  >>
>  >  >> On 01-09-16 08:53, Nathan Rossi wrote:
>  >  >>> On Thu, Sep 1, 2016 at 3:12 AM, Peter Smith <salerio at gmail.com> wrote:
>  >  >>>> Glad its not just me. Do you think it could be related to my use of the
>  >  >>>> master branch rather than a released version?
>  >  >>>>
>  >  >>>> On 31 August 2016 at 15:00, Mike Looijmans <mike.looijmans at topic.nl>
> wrote:
>  >  >>>>>
>  >  >>>>> On 31-08-16 15:40, SMITH Peter T wrote:
>  >  >>>>>>
>  >  >>>>>> Hi,
>  >  >>>>>>
>  >  >>>>>> I am trying to build core image minimal for the ZCU102 using the master
>  >  >>>>>> branches poky and meta-xilinx and I am receiving lots of warnings about
>  >  >>>>>> kernel
>  >  >>>>>> configurations not making it into the final kernel configurations. Is
>  >  >>>>>> this
>  >  >>>>>> normal or I have I done something wrong?
>  >  >>>>>
>  >  >>>>>
>  >  >>>>> Well I noticed that the kernel config doesn't quite work as expected on
>  >  >>>>> that particular board but I'm still investigating the "why" myself.
>  >  >>>
>  >  >>> Found the bug, it relates to a change in oe-core/kernel-yocto.bbclass
>  >  >>> that was made recently 0f698dfd1c8bbc0d53ae7977e26685a7a3df52a3. The
>  >  >>> values for KCONFIG_MODE changed, such that it is defaulting to
>  >  >>> "allnoconfig". This only applies to zcu102-zynqmp because its the only
>  >  >>> machine that uses a KBUILD_DEFCONFIG as the base.
>  >  >>>
>  >  >>> I've staged the following patch
>  >  >>>
>  >
> https://github.com/nathanrossi/meta-xilinx/commit/34e08e9f6635d4365058a96ea13bf8286d9930a8.
>  >  >>> Could one of you confirm that it resolves the issue and that the built
>  >  >>> kernel works?
>  >  >>
>  >  >> Hmm, it seems to break my build:
>  >  >>
>  >  >> | [INFO] Configuring target/machine combo: "alldefconfig/--reconfig"
>  >  >> | No build dir specified. Use "-o" to specify one.
>  >  >> | config of "alldefconfig/--reconfig" failed
>  >  >>
>  >  >> so apparently this is for a newer OE master?
>  >  >
>  >  > Yes the oe change was committed ~2.5 weeks ago, specifically on
>  >  > 2016-08-18 08:27:13 (GMT). But it is odd that you are seeing issues
>  >  > with configs before this patch was applied to master, maybe a separate
>  >  > issue with the configs?
>  >
>  > So far the problem I was having was that in the "dev" kernel the "defconfig"
>  > from the kernel itself would be mostly ignored, so almost no drivers were
>  > selected. I worked around that by copying most of the kernel 4.6 defconfig
>  > into the zynqmp.cfg files.
>  >
>  > I'm re-building with today's OE master to see if that issue is related.
>
> Not related.
>
> If I build the "dev" kernel (current master of linux-xlnx), the "defconfig"
> for the ZynqMP doesn't actually get parsed somehow, and I end up with a kernel
> that won't compile due to conflicting defines (for example
> "CONFIG_SOC_XILINX_ZYNQMP" is not set, causing
> drivers/soc/xilinx/zynqmp/tap_delays.c, which somehow still triggers to be
> compiled, to fail because the header contains blank implementations.
>
> What does work is manually copy the defconfig contents into a cfg file. But
> that's not how it's supposed to work I guess.
>

Found the issue, "xilinx_zynqmp_defconfig" in the xilinx kernel repo is just 
broken. It's missing lots of standard options like "USB" and "BLOCK", so all 
the needfull things get ignored.

I'l send a fixup patch to Xilinx.




Kind regards,

Mike Looijmans
System Expert

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