[RFC PATCH v2 0/5] Add hardware prefetch driver for A64FX and Intel processors

[tarumizu.kohei at fujitsu.com]

>> Also, as dhansen points out, we have already
>> 
>>   /sys/devices/system/cpu/cpu*/cache
>> 
>> so all those knobs belong there on x86.
> 
> Intel MSR and A64FX have hardware prefetcher that affect L1d cache and
> L2 cache. Does it suit your intention to create a prefetcher directory
> under the cache directory as below?
> 
> /sys/devices/system/cpu/cpu*/cache/
>                 index0/prefetcher/enable
>                 index2/prefetcher/enable
> 
> The above example presumes that the L1d cache is at index0 (level: 1,
> type: Data) and the L2 cache is at index2 (level:2, type: Unified).

Any comment or suggestion would be much appreciated. In particular,
is our using cache/index directory above match your intent?