Failure to boot G4: dt_headr_start=0x01501000

[Christophe Leroy]

On 05/23/2019 09:59 AM, Christophe Leroy wrote:
> 
> 
> On 05/23/2019 09:45 AM, Christophe Leroy wrote:
>>
>>
>> Le 23/05/2019 à 10:53, Mathieu Malaterre a écrit :
>>>> Commit id is:
>>>>
>>>> e93c9c99a629 (tag: v5.1) Linux 5.1
>>>>
>>>>> Did you try latest powerpc/merge branch ?
>>>>
>>>> Will try that next.
>>>
>>> I confirm powerpc/merge does not boot for me (same config). Commit id:
>>>
>>> a27eaa62326d (powerpc/merge) Automatic merge of branches 'master',
>>> 'next' and 'fixes' into merge
>>
>> I see in the config you sent me that you have selected CONFIG_KASAN, 
>> which is a big new stuff.
>>
>> Can you try without it ?
> 
> While building with your config, I get a huge amount of:
> 
> ppc-linux-ld: warning: orphan section `.data..LASAN0' from 
> `lib/xarray.o' being placed in section `.data..LASAN0'.
>    SORTEX  vmlinux
> 
> 
> 
> I see you have also selected CONFIG_LD_DEAD_CODE_DATA_ELIMINATION=y
> 
> I guess nobody have never tried both this and CONFIG_KASAN together on 
> ppc32. I'll give it a try.


And you also have CONFIG_FTRACE.

In a recent patch implementing KASAN on PPC64, Daniel says that KASAN 
and FTRACE don't go together well 
(https://patchwork.ozlabs.org/patch/1103826/)

If you find out that it works without KASAN, can you then try with KASAN 
but without FTRACE ?

Christophe