[Intel-gfx] [PATCH 8/8] drm/i915: Add support for emitting execbuffer tags through OA counter reports

[Chris Wilson]

On Thu, Mar 16, 2017 at 11:44:15AM +0530, sourab.gupta at intel.com wrote:
> From: Sourab Gupta <sourab.gupta at intel.com>
> 
> This patch enables userspace to specify tags (per workload), provided via
> execbuffer ioctl, which could be added to OA reports, to help associate
> reports with the corresponding workloads.
> 
> There may be multiple stages within a single context, from a userspace
> perspective. An ability is needed to individually associate the OA reports
> with their corresponding workloads(execbuffers), which may not be possible
> solely with ctx_id or pid information. This patch enables such a mechanism.
> 
> In this patch, upper 32 bits of rsvd1 field, which were previously unused
> are now being used to pass in the tag.

Clearly this patch hasn't been tested.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre