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    SubjectRe: [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:
    > > 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

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