[Intel-gfx] [RFC v4 0/5] Support perf stat with i915 PMU

[Dmitry Rogozhkin]

These patches depend on the RFC patches enabling i915 PMU from Tvrtko:
  https://patchwork.freedesktop.org/series/27488/
Thus, CI failure to build them is expected. I think that my patches should
be squeashed in Tvrtko's one actually.

The first patch simply reorders functions and does nothing comparing to
Tvrtko's patches. Next patches add fixes according to PMU API comments
and clarifications from PMU aware engineers.

v1: Make busy_stats refcounted instead of the whole pmu.

v2: Expose cpumask for the i915 pmu to prevent creation of multiple events
    of the same type. Remove perf-driver level sampling.

v3: Add CPUs online/offline tracking to form cpumask.

v4: Add i915_pmu_enable_info debugfs entry. Introduce refcounting of event
    subscriptions.

Dmitry Rogozhkin (5):
  drm/i915/pmu: reorder function to suite next patch
  drm/i915/pmu: serve global events and support perf stat
  drm/i915/pmu: introduce i915_pmu_enable_info debugfs entry
  drm/i915/pmu: introduce refcounting of event subscriptions
  drm/i915/pmu: deny perf driver level sampling of i915 PMU

 drivers/gpu/drm/i915/i915_debugfs.c     |   9 +
 drivers/gpu/drm/i915/i915_drv.h         |  20 +-
 drivers/gpu/drm/i915/i915_pmu.c         | 404 +++++++++++++++++---------------
 drivers/gpu/drm/i915/intel_ringbuffer.h |   5 +-
 include/uapi/drm/i915_drm.h             |  28 ++-
 5 files changed, 262 insertions(+), 204 deletions(-)

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1.8.3.1