On Wed, Feb 12, 2020 at 11:19:29AM +0800, Wu Hao wrote:

On Mon, Feb 10, 2020 at 04:34:01PM +0000, Will Deacon wrote:

quoted

Hi,

On Mon, Feb 10, 2020 at 11:47:49AM +0800, Wu Hao wrote:

quoted

This patch adds support for performance reporting private feature
for FPGA Management Engine (FME). Now it supports several different
performance counters, including 'basic', 'cache', 'fabric', 'vtd'
and 'vtd_sip'. It allows user to use standard linux tools to access
these performance counters.

I had a quick look at this, and it mostly looks alright to me. Just a few
high-level comments/questions:

Hi Will

Thanks a lot for the review! :)

quoted

  - I would still prefer for the PMU drivers to live under drivers/perf/

Hm.. one possible way is to create a platform device, and introduce a new
platform device driver under drivers/perf/.

No, do not abuse platform drivers, you have a real device, use it.