Re: [PATCH v2 02/33] Documentation, ABI: Add a document entry for cache id

From: Thomas Gleixner
Date: Thu Sep 08 2016 - 15:36:39 EST

On Thu, 8 Sep 2016, Fenghua Yu wrote:
> +What: /sys/devices/system/cpu/cpu*/cache/index*/id
> +Date: July 2016
> +Contact: Linux kernel mailing list <linux-kernel@xxxxxxxxxxxxxxx>
> +Description: Cache id
> +
> + The id identifies a hardware cache of the system within a given
> + cache index in a set of cache indices. The "index" name is
> + simply a nomenclature from CPUID's leaf 4 which enumerates all
> + caches on the system by referring to each one as a cache index.
> + The (cache index, cache id) pair is unique for the whole
> + system.
> +
> + Currently id is implemented on x86. On other platforms, id is
> + not enabled yet.

And it never will be available on anything else than x86 because there is
no other architecture providing CPUID leaf 4 ....

If you want this to be generic then get rid of the x86isms in the
explanation and describe the x86 specific part seperately.