[linux-yocto] Linux-yocto-custom and meta-data
dvhart at linux.intel.com
Mon Oct 15 16:47:22 PDT 2012
On 10/15/2012 04:42 PM, Bruce Ashfield wrote:
> On 12-10-15 7:26 PM, Darren Hart wrote:
>> I've got a customer that insists on using their own kernel version, but
>> doesn't want to keep their config in recipe-space. I already have them
>> using linux-yocto-custom with a linux 3.5 based git repository. Seems to
>> me the best way to address this would be for them to create a meta
>> directory in their master branch which contains their BSP definition. Is
>> it as simple as the following?
>> $ tree meta
>> └── cfg
>> └── kernel-cache
>> └── bsp
>> └── mybsp
>> ├── mybsp.cfg
>> └── mybsp.scc
>> Where mybsp.scc is:
>> define KMACHINE mybsp
>> define KARCH i386
>> kconf hardware mybsp.cfg
>> This doesn't define any kernel types, would we need to do that, or can
>> the tools deal with that?
> The tools want to search by kmachine + ktype. In theory they can just
> search on one and get the best match, so taking the default ktype of
> standard *should* work (and not specifying it in the .scc, but it
> should still be passed to the tools).
So if I specify KTYPE=standard and MACHINE=mybsp, then I should be able
to get away with:
Note the mybsp-standard.scc name, and the lack of a
> If storing that structure under 'meta' doesn't work, it's something
> I can get working. If you don't get around to testing it, I will
> in the morning. It's not a use case we had covered yet, so I wouldn't
> consider it a defect .. but it is a good use case that should be
OK, I won't be getting to it tonight I don't think, but let's report
our progress here to keep in sync. This is rather time sensitive (for
me anyway ;-).
>> Obviously it would be more ideal to use the linux-yocto repository
>> itself with common base kernel version and create policy and hardware
>> fragments, etc. But given these constraints, is this about right?
> It's a step in the right direction, bonus points if you can at least
> convince them to share the policy from linux-yocto by taking the
> yocto-kernel-cache as a baseline, that way it'll be at least similar
> to the linux-yocto tree.
Unfortunately that won't be happening initially. mybsp.cfg is going to
be a complete defconfig. This is more political than technical,
However, if we can get a yocto meta tree in their sources, that will
make the ultimate transition all that much easier in the future.
Intel Open Source Technology Center
Yocto Project - Technical Lead - Linux Kernel
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