[PATCH v4 1/2] powerpc/time: Only set CONFIG_ARCH_HAS_SCALED_CPUTIME on PPC64

[Christophe Leroy]

Hi Nick,


Le 07/06/2018 à 03:43, Nicholas Piggin a écrit :
> On Wed,  6 Jun 2018 14:21:08 +0000 (UTC)
> Christophe Leroy <christophe.leroy at c-s.fr> wrote:
> 
>> scaled cputime is only meaningfull when the processor has
>> SPURR and/or PURR, which means only on PPC64.
>>

[...]

> 
> I wonder if we could make this depend on PPC_PSERIES or even
> PPC_SPLPAR as well? (That would be for a later patch)

Can we go further on this ?

Do we know exactly which configuration support scaled cputime, in 
extenso have SPRN_SPURR and/or SPRN_PURR ?

Ref https://github.com/linuxppc/issues/issues/171

Christophe