Load an empty ringbuffer for preemption, ignoring the lite-restore workaround as we know the preempt context is always idle before preemption. Note that after some digging by Michal Winiarski, we found that RING_HEAD is no longer being updated (due to inhibiting context save restore) so this patch is already in effect! Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> Cc: Michal Winiarski <michal.winiarski@xxxxxxxxx> Cc: Michel Thierry <michel.thierry@xxxxxxxxx> Cc: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx> Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_lrc.c | 7 ------- 1 file changed, 7 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 9b6d781b22ec..e2d5e19b8a5e 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -449,13 +449,6 @@ static void inject_preempt_context(struct intel_engine_cs *engine) GEM_BUG_ON(engine->execlists.preempt_complete_status != upper_32_bits(ce->lrc_desc)); - GEM_BUG_ON(!IS_ALIGNED(ce->ring->size, WA_TAIL_BYTES)); - - memset(ce->ring->vaddr + ce->ring->tail, 0, WA_TAIL_BYTES); - ce->ring->tail += WA_TAIL_BYTES; - ce->ring->tail &= (ce->ring->size - 1); - ce->lrc_reg_state[CTX_RING_TAIL+1] = ce->ring->tail; - GEM_BUG_ON((ce->lrc_reg_state[CTX_CONTEXT_CONTROL + 1] & _MASKED_BIT_ENABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT | CTX_CTRL_ENGINE_CTX_SAVE_INHIBIT)) != -- 2.16.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
