[PATCH] powerpc/crash: Allow direct printing on kexec

[Ryo Takakura]

On 2024-10-21, John Ogness <john.ogness at linutronix.de> wrote:
>On 2024-10-21, Ryo Takakura <ryotkkr98 at gmail.com> wrote:
>>> Rather than removing the deferring, it would be better to convert the
>>> console you are using to the new NBCON API. Then it would be able to
>>> print direct and safe during panic. (printk_deferred does not affect
>>> NBCON consoles.) What console driver are you using that you want to
>>> see the messages on?
>>
>> I was working on qemu ppc64 this time but I am usually working on 
>> Raspberry Pi 4 (mostly for fun and study) which uses either of 
>> bcm2835-aux-uart or amba-pl011. It would be really nice to see them 
>> working as nbcon!
>> I am thinking of taking a look at [0] but If there were any other 
>> references, I would really like to look into as well.
>>
>> [0] https://lore.kernel.org/lkml/87wn3zsz5x.fsf@jogness.linutronix.de/
>
>The lastest version of the series is here [1]. The series is still
>undergoing revisions, however the changes are 8250-specific. The API for
>nbcon consoles is already available since 6.12-rc1. You are certainly
>welcome to try to convert one of those Raspi 4 drivers to the nbcon
>interface. I would be happy to review it.

Thanks for sharing!
I will take a look at it and definitley give a try!

>John Ogness

Sincerely,
Ryo Takakura