1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c
index b4fc7f95cbe1..edb1416585f5 100644
--- a/drivers/gpu/drm/i915/gvt/handlers.c
+++ b/drivers/gpu/drm/i915/gvt/handlers.c
@@ -1692,8 +1692,22 @@ static int ring_mode_mmio_write(struct intel_vgpu *vgpu, unsigned int offset,
         bool enable_execlist;
         int ret;
 
+        (*(u32 *)p_data) &= ~_MASKED_BIT_ENABLE(1);
+        if (IS_COFFEELAKE(vgpu->gvt->dev_priv))
+                (*(u32 *)p_data) &= ~_MASKED_BIT_ENABLE(2);
         write_vreg(vgpu, offset, p_data, bytes);
 
+        if (data & _MASKED_BIT_ENABLE(1)) {
+                enter_failsafe_mode(vgpu, GVT_FAILSAFE_UNSUPPORTED_GUEST);
+                return 0;
+        }
+
+        if (IS_COFFEELAKE(vgpu->gvt->dev_priv) &&
+            data & _MASKED_BIT_ENABLE(2)) {
+                enter_failsafe_mode(vgpu, GVT_FAILSAFE_UNSUPPORTED_GUEST);
+                return 0;
+        }
+
         /* when PPGTT mode enabled, we will check if guest has called
          * pvinfo, if not, we will treat this guest as non-gvtg-aware
          * guest, and stop emulating its cfg space, mmio, gtt, etc.