X-Git-Url: http://git.samba.org/samba.git/?p=sfrench%2Fcifs-2.6.git;a=blobdiff_plain;f=drivers%2Fgpu%2Fdrm%2Fi915%2Fgvt%2Fcmd_parser.c;h=718ca08f95751af6303f1eb1b651f14cafe3ddc4;hp=a294427088d85e75b3b1208c093bfaca047b01a5;hb=bba9525520b6028ecbe7486e13216e9ede8636be;hpb=0c79f9cb77eae28d48a4f9fc1b3341aacbbd260c;ds=sidebyside

diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c b/drivers/gpu/drm/i915/gvt/cmd_parser.c
index a294427088d8..718ca08f9575 100644
--- a/drivers/gpu/drm/i915/gvt/cmd_parser.c
+++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c
@@ -813,15 +813,31 @@ static inline bool is_force_nonpriv_mmio(unsigned int offset)
 }
 
 static int force_nonpriv_reg_handler(struct parser_exec_state *s,
-				     unsigned int offset, unsigned int index)
+		unsigned int offset, unsigned int index, char *cmd)
 {
 	struct intel_gvt *gvt = s->vgpu->gvt;
-	unsigned int data = cmd_val(s, index + 1);
+	unsigned int data;
+	u32 ring_base;
+	u32 nopid;
+	struct drm_i915_private *dev_priv = s->vgpu->gvt->dev_priv;
+
+	if (!strcmp(cmd, "lri"))
+		data = cmd_val(s, index + 1);
+	else {
+		gvt_err("Unexpected forcenonpriv 0x%x write from cmd %s\n",
+			offset, cmd);
+		return -EINVAL;
+	}
 
-	if (!intel_gvt_in_force_nonpriv_whitelist(gvt, data)) {
+	ring_base = dev_priv->engine[s->ring_id]->mmio_base;
+	nopid = i915_mmio_reg_offset(RING_NOPID(ring_base));
+
+	if (!intel_gvt_in_force_nonpriv_whitelist(gvt, data) &&
+			data != nopid) {
 		gvt_err("Unexpected forcenonpriv 0x%x LRI write, value=0x%x\n",
 			offset, data);
-		return -EPERM;
+		patch_value(s, cmd_ptr(s, index), nopid);
+		return 0;
 	}
 	return 0;
 }
@@ -869,7 +885,7 @@ static int cmd_reg_handler(struct parser_exec_state *s,
 		return -EINVAL;
 
 	if (is_force_nonpriv_mmio(offset) &&
-		force_nonpriv_reg_handler(s, offset, index))
+		force_nonpriv_reg_handler(s, offset, index, cmd))
 		return -EPERM;
 
 	if (offset == i915_mmio_reg_offset(DERRMR) ||