If a request is submitted and known to require no preemption, disable
arbitration around the batch which prevents the HW from handling a
preemption request during the payload.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210108204026.20682-7-chris@chris-wilson.co.uk
{
int err;
+ if (intel_context_nopreempt(eb->context))
+ __set_bit(I915_FENCE_FLAG_NOPREEMPT, &eb->request->fence.flags);
+
err = eb_move_to_gpu(eb);
if (err)
return err;
return err;
}
- if (intel_context_nopreempt(eb->context))
- __set_bit(I915_FENCE_FLAG_NOPREEMPT, &eb->request->fence.flags);
-
return 0;
}
{
u32 *cs;
+ if (unlikely(i915_request_has_nopreempt(rq)))
+ return gen8_emit_bb_start_noarb(rq, offset, len, flags);
+
cs = intel_ring_begin(rq, 6);
if (IS_ERR(cs))
return PTR_ERR(cs);