[PATCH v2] powerpc/64s: introduce CONFIG_MAXSMP to test very large SMP

[Michael Ellerman]

Christophe Leroy <christophe.leroy at csgroup.eu> writes:
> Le 09/11/2021 à 07:51, Nicholas Piggin a écrit :
...
>> diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
>> index a208997ade88..14c275e0ff93 100644
>> --- a/arch/powerpc/platforms/Kconfig.cputype
>> +++ b/arch/powerpc/platforms/Kconfig.cputype
>> @@ -475,9 +475,14 @@ config SMP
>>   
>>   	  If you don't know what to do here, say N.
>>   
>> +# MAXSMP sets 8192 if COMPILE_TEST because that's what x86 has flushed out.
>> +# Exceeding that will cause a lot of compile errors. Have to deal with those
>> +# first.
>>   config NR_CPUS
>> -	int "Maximum number of CPUs (2-8192)" if SMP
>> -	range 2 8192 if SMP
>> +	int "Maximum number of CPUs (2-8192)" if SMP && !MAXSMP
>> +	range 2 16384 if SMP
>> +	default 16384 if MAXSMP && !COMPILE_TEST
>> +	default 8192 if MAXSMP && COMPILE_TEST
>
> You can do less complex. First hit becomes the default, so you can do:
>
> 	default 8192 if MAXSMP && COMPILE_TEST
> 	default 16384 if MAXSMP

I did that when applying.

cheers