[Intel-gfx] [PATCH 1/8] drm/i915: Add ctx getparam ioctl parameter to retrieve ctx unique id

[Chris Wilson]

On Thu, Mar 16, 2017 at 11:44:08AM +0530, sourab.gupta at intel.com wrote:
> From: Sourab Gupta <sourab.gupta at intel.com>
> 
> This patch adds a new ctx getparam ioctl parameter, which can be used to
> retrieve ctx unique id by userspace.
> 
> This can be used by userspace to map the OA reports received in the
> i915 perf samples with their associated ctx's (The OA reports have the
> hw ctx ID information embedded for Gen8+).
> Otherwise the userspace has no way of maintaining this association,
> since it has the knowledge of only per-drm file specific ctx handles.
> 
> Signed-off-by: Sourab Gupta <sourab.gupta at intel.com>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre