On Thu, Sep 01, 2016 at 04:38:02PM -0500, Kim Phillips wrote:

On Thu, 1 Sep 2016 16:37:07 +0100
Russell King - ARM Linux [off-list ref] wrote:

quoted

On Wed, Aug 31, 2016 at 03:23:36PM +0100, Mark Rutland wrote:

quoted

The L2C-220 (AKA L220) and L2C-310 (AKA PL310) cache controllers feature
a Performance Monitoring Unit (PMU), which can be useful for tuning
and/or debugging. This hardware is always present and the relevant
registers are accessible to non-secure accesses. Thus, no special
firmware interface is necessary.

This patch adds support for the PMU, plugging into the usual perf
infrastructure. The overflow interrupt is not always available (e.g. on
RealView PBX A9 it is not wired up at all), and the hardware counters
saturate, so the driver does not make use of this. Instead, the driver
periodically polls and reset counters as required to avoid losing
events due to saturation.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Pawel Moll <redacted>
Cc: Kim Phillips <redacted>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Will Deacon <redacted>

Much better, thanks.  When you're happy, please put it in the patch
system, thanks.

feel free to tack on my:

Tested-by: Kim Phillips <redacted>

Cheers!

I've folded that in, and dropped this in the patch system as 8611/1.

Thanks,
Mark.