Quoting Rafael Antognolli (2018-02-05 23:33:30)
> This workaround should prevent a bug that can be hit on a context
> restore. To avoid the issue, we must emit a PIPE_CONTROL with CS stall
> (0x7a04 0x0010 0x 0x) followed by 12DW's of
> NOOP(0x0) in the indirect context
This workaround should prevent a bug that can be hit on a context
restore. To avoid the issue, we must emit a PIPE_CONTROL with CS stall
(0x7a04 0x0010 0x 0x) followed by 12DW's of
NOOP(0x0) in the indirect context batch buffer, to ensure the engine is
idle prior to