[PATCH] drm/i915/gvt: set max priority for gvt context

[Zhenyu Wang]

This is to workaround guest driver hang regression after
preemption enable that gvt hasn't enabled handling of that
for guest workload. So in effect this disables preemption
for gvt context now.

Signed-off-by: Zhenyu Wang <zhenyuw at linux.intel.com>
---
Looks submission refactor does make this is not trivial to apply for -fixes,
so still send this one for -next and will do backport for -fixes.

 drivers/gpu/drm/i915/gvt/scheduler.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/gvt/scheduler.c b/drivers/gpu/drm/i915/gvt/scheduler.c
index c98669293e77..d65bcb566cf5 100644
--- a/drivers/gpu/drm/i915/gvt/scheduler.c
+++ b/drivers/gpu/drm/i915/gvt/scheduler.c
@@ -1039,6 +1039,9 @@ int intel_vgpu_setup_submission(struct intel_vgpu *vgpu)
 	if (IS_ERR(s->shadow_ctx))
 		return PTR_ERR(s->shadow_ctx);
 
+	if (HAS_LOGICAL_RING_PREEMPTION(vgpu->gvt->dev_priv))
+		s->shadow_ctx->priority = INT_MAX;
+
 	bitmap_zero(s->shadow_ctx_desc_updated, I915_NUM_ENGINES);
 
 	s->workloads = kmem_cache_create("gvt-g_vgpu_workload",
-- 
2.15.1