[Intel-gfx] [PATCH] drm/i915/perf: Invalidate OA TLB on when closing perf stream

[Umesh Nerlige Ramappa]

On Mon, Mar 09, 2020 at 10:45:47PM +0000, Chris Wilson wrote:
>Quoting Umesh Nerlige Ramappa (2020-03-09 21:10:57)
>> On running several back to back perf capture sessions involving closing
>> and opening the perf stream, invalid OA reports are seen in the
>> beginning of the OA buffer in some sessions. Fix this by invalidating OA
>> TLB when the perf stream is closed or disabled on gen12.
>>
>> Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa at intel.com>
>
>Testcase?

Issue occurs if all perf tests are run on TGL, but I guess a single 
subtest should do it too. Here it is -
https://patchwork.freedesktop.org/patch/356973/

Thanks,
Umesh

>-Chris