Fwd: zImage support for ppc

[Sunil Kumar]

Hi ,

Thanks for replying Pratyush.

I have also seen the zImage support is present for the ppc64, earlier
my plan was to take this source as reference and port it for ppc.
But in zImage_ppc64_usage() its clearly written that "zImage support
is still broken", which stop me.

Is the zImage for ppc64 working properly ? Should I trust this ?

Asking this because I don't have hardware to test for ppc64.

If anyone else used the ppc64 zImage as secondary kernel. please
provide your inputs here.

Regards
Sunil Kumar
Thanks & Regards,
Sunil Kumar
Technical Lead
Montavista Software
Bengaluru, India - 560008
www.mvista.com | +91-80-67228800 [+8865]


On Fri, Sep 8, 2017 at 8:58 AM, Pratyush Anand <panand at redhat.com> wrote:
>
>
> On Thursday 07 September 2017 01:49 PM, Sunil Kumar wrote:
>>
>> $ kexec -e
>>
>> As the zImage is also and elf file format, but the control is not
>> getting transferred to the zImage.
>> I can see kexec is able to load all the segments properly, but looks
>> like its not able to figure out the entry point to start execution
>> with zImage.
>>
>> -------------------------------------------------------------------------------------------------------------------------------------------------------
>> kexec_load: entry = 0x329678 flags = 0x0
>>
>> -------------------------------------------------------------------------------------------------------------------------------------------------------
>>
>> On the same board (i.e. Freescale p2020ds), uImage and vmlinux works fine.
>
>
> Looking into upstream code: ppc has only support of elf and uImage,and so
> they work.
>
>>
>> Just curious to know , why the zImage support is still not provided in
>> the kexec for ppc ??
>
>
> Probably because no one needed it till now.
>
>> Is there any restriction from kexec design point of view ?
>
>
> I do not think. You can write a patch. I see, ppc64 has zImage support, so
> you can take that as example and can write code for ppc as well.
>
> --
> Regards
> Pratyush