[BISECTED] kexec regression on PowerBook G4

[Christophe Leroy]

Le 24/05/2019 à 09:36, Aaro Koskinen a écrit :
> Hi,
> 
> On Fri, May 24, 2019 at 08:08:36AM +0200, Christophe Leroy wrote:
>>> Le 24/05/2019 à 00:23, Aaro Koskinen a écrit :
>>>> Unfortunately still no luck... The crash is pretty much the same with
>>>> both
>>>> changes.
>>>
>>> Right. In fact change_page_attr() does nothing because this part of RAM is
>>> mapped by DBATs so v_block_mapped() returns not NULL.
>>>
>>> So, we have to set an IBAT for this area. I'll try and send you a new
>>> patch for that before noon (CET).
>>>
>>
>> patch sent out. In the patch I have also added a printk to print the buffer
>> address, so if the problem still occurs, we'll know if the problem is really
>> at the address of the buffer or if we are wrong from the beginning.
> 
> Reboot code buffer at ef0c3000
> Bye!
> BUG: Unable to handle kernel instruction fetch
> Faulting instruction address: 0xef0c3000
> 

Oops, I forgot to call update_bats() after setibat().

Can you add it and retry ?

Thanks
Christophe