On Mon, 12 Jun 2017 12:08:23 +0100
Mark Rutland [off-list ref] wrote:

On Mon, Jun 05, 2017 at 04:22:52PM +0100, Will Deacon wrote:

quoted

This is the sixth posting of the patches previously posted here:

  rfcv1: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-January/476450.html
  rfcv2: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-January/479387.html
     v1: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-January/483684.html
     v2: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-April/499938.html
     v3: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-May/507132.html

The main change since v3 is that I have reworked and fixed the CPU hotplug
and notifier bits, in light of review comments from tglx.

The architecture documentation is available here:

  https://developer.arm.com/products/architecture/a-profile/docs/ddi0586/latest/arm-architecture-reference-manual-supplement-statistical-profiling-extension-for-armv8-a

Kim, do you have any version of the userspace side that we could look
at?

For review, it would be really helpful to have something that can poke
the PMU, even if it's incomplete or lacking polish.

Here's the latest push, based on a a couple of prior versions of this
driver:

http://linux-arm.org/git?p=linux-kp.git;a=shortlog;h=refs/heads/armspev0.1

I don't seem to be able to get any SPE data output after rebasing on
this version of the driver.  Still don't know why at the moment...

Kim