Re: [PATCH 1/3] MIPS: Introduce WAR_4KC_LLSC config option

[Maciej W. Rozycki]

On Fri, 19 May 2023, Jiaxun Yang wrote:

> > Given the circumstances I think this should be `panic'.  You don't want 
> > to continue with a system that can randomly lock up.
> 
> I just checked how other architectures handle such situation, it seems like
> TAINT_CPU_OUT_OF_SPEC is a better option.

 That can be easily missed, just as a random message in the kernel log, 
even at a high priority, and LOGLEVEL_ERR is not particularly high even.  
For a system configuration that qualifies as not usable for any practical 
purpose I find this approach leaving something to desire.

> Panic in cpu_probe can be frustrating for users as it is earlier than initialisation
> of consoles so the panic message can never be read by users.

 Is there no early console support for the systems affected?

  Maciej