[PATCH v2 0/5] Cavium ThunderX uncore PMU support

On Tue, Jun 28, 2016 at 11:24:20AM +0100, Will Deacon wrote:

Hi Jan,

On Wed, Mar 09, 2016 at 05:21:02PM +0100, Jan Glauber wrote:

quoted

This patch series provides access to various counters on the ThunderX SOC.

For details of the uncore implementation see patch #1.

Patches #2-5 add the various ThunderX specific PMUs.

As suggested I've put the files under drivers/perf/uncore. I would
prefer this location over drivers/bus because not all of the uncore
drivers are bus related.

What's the status of these patches? Were you planning to send a new
version?

Will

Hi Will,

I was half-way through with addressing Mark's review comments when
got side-tracked.

The principle question these patches raised remains open though in my
opinion, how to determine the socket a device belongs to.

There is no first-class interface to ask a device or the firmware
which socket the device lives on.

The options I see are:
A) Using NUMA node information, depends on CONFIG_NUMA
B) Decoding the socket bits of the PCI BAR address
C) Using PCI topology information

A is what I tried, but I agree that depending on CONFIG_NUMA is not a good
solution. B would be easy but looks not very future-proof. So option C
is what is left...

thanks,
Jan