[PATCH v2 3/6] powerpc/smp: Move shared_processor static key to smp.h

Michael Ellerman mpe at ellerman.id.au
Fri Oct 20 21:44:14 AEDT 2023

Srikar Dronamraju <srikar at linux.vnet.ibm.com> writes:
> * Michael Ellerman <mpe at ellerman.id.au> [2023-10-19 15:41:40]:
>> Srikar Dronamraju <srikar at linux.vnet.ibm.com> writes:
>> > The ability to detect if the system is running in a shared processor
>> > mode is helpful in few more generic cases not just in
>> > paravirtualization.
>> > For example: At boot time, different scheduler/ topology flags may be
>> > set based on the processor mode. Hence move it to a more generic file.
>> I'd rather you just included paravirt.h in the few files where you need it.
> I thought, detecting if a Processor was shared or not was more a
> smp/processor related than a paravirt related.

It's both really :)

It's definitely paravirt related though, because if we weren't
*para*virt then we wouldn't know there was a hypervisor at all :)

But having smaller more focused headers is preferable in general just
for mechanical reasons.


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