From 11474e9091cf2002e948647fd9f63a7f027e488a Mon Sep 17 00:00:00 2001
From: Zhenyu Wang <zhenyuw@linux.intel.com>
Date: Mon, 4 Dec 2017 10:42:58 +0800
Subject: [PATCH] drm/i915/gvt: set max priority for gvt context
Git-commit: 11474e9091cf2002e948647fd9f63a7f027e488a
Patch-mainline: v4.15-rc3
References: FATE#322643 bsc#1055900
No-fix: 1603660b3342269c95fcafee1945790342a8c28e

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@linux.intel.com>
(cherry picked from commit 1603660b3342269c95fcafee1945790342a8c28e)

Acked-by: Takashi Iwai <tiwai@suse.de>

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

--- a/drivers/gpu/drm/i915/gvt/scheduler.c
+++ b/drivers/gpu/drm/i915/gvt/scheduler.c
@@ -757,6 +757,9 @@ int intel_vgpu_init_gvt_context(struct i
 	if (IS_ERR(vgpu->shadow_ctx))
 		return PTR_ERR(vgpu->shadow_ctx);
 
+	if (INTEL_INFO(vgpu->gvt->dev_priv)->has_logical_ring_preemption)
+		vgpu->shadow_ctx->priority = INT_MAX;
+
 	vgpu->shadow_ctx->engine[RCS].initialised = true;
 
 	bitmap_zero(vgpu->shadow_ctx_desc_updated, I915_NUM_ENGINES);