[Intel-gfx] [PATCH] drm/i915/pmu: Turn on perf events in debug mode

[Chris Wilson]

Quoting Tvrtko Ursulin (2017-11-22 16:59:01)
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> We have a policy to select all optional kernel features which are needed
> for CI if DRM_I915_DEBUG is turned on. So add PERF_EVENTS as well.
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Suggested-by: Chris Wilson <chris at chris-wilson.co.uk>
> ---
>  drivers/gpu/drm/i915/Kconfig.debug | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/i915/Kconfig.debug b/drivers/gpu/drm/i915/Kconfig.debug
> index 9e53edbc713b..1a75cc94e759 100644
> --- a/drivers/gpu/drm/i915/Kconfig.debug
> +++ b/drivers/gpu/drm/i915/Kconfig.debug
> @@ -29,6 +29,7 @@ config DRM_I915_DEBUG
>         select DRM_I915_SW_FENCE_DEBUG_OBJECTS
>         select DRM_I915_SELFTEST
>         select DRM_I915_TRACE_GEM
> +       select PERF_EVENTS

If I am reading arch/x86/Kconfig correctly, then PERF_EVENTS is always
selected for X86.

config X86
	def_bool y
	...
	select HAVE_PERF_EVENTS
	...
	select PERF_EVENTS
	...

Is it worth documenting our need for the syscall to run igt/perf_pmu
anyway?
-Chris