drm/i915/gvt: Add gvt options sanitize function

The intel_gvt_sanitize_options will sanitize the GVT related
options before doing initialize the GVT.

Suggested-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

1 files changed, 26 insertions, 10 deletions

diff --git a/drivers/gpu/drm/i915/intel_gvt.c b/drivers/gpu/drm/i915/intel_gvt.c
index e1ab6432a914..dde9c78325e4 100644
--- a/drivers/gpu/drm/i915/intel_gvt.c
+++ b/drivers/gpu/drm/i915/intel_gvt.c
@@ -51,6 +51,32 @@ static bool is_supported_device(struct drm_i915_private *dev_priv)
 }
 
 /**
+ * intel_gvt_sanitize_options - sanitize GVT related options
+ * @dev_priv: drm i915 private data
+ *
+ * This function is called at the i915 options sanitize stage.
+ */
+void intel_gvt_sanitize_options(struct drm_i915_private *dev_priv)
+{
+	if (!i915.enable_gvt)
+		return;
+
+	if (intel_vgpu_active(dev_priv)) {
+		DRM_INFO("GVT-g is disabled for guest\n");
+		goto bail;
+	}
+
+	if (!is_supported_device(dev_priv)) {
+		DRM_INFO("Unsupported device. GVT-g is disabled\n");
+		goto bail;
+	}
+
+	return;
+bail:
+	i915.enable_gvt = 0;
+}
+
+/**
  * intel_gvt_init - initialize GVT components
  * @dev_priv: drm i915 private data
  *
@@ -69,16 +95,6 @@ int intel_gvt_init(struct drm_i915_private *dev_priv)
 		return 0;
 	}
 
-	if (intel_vgpu_active(dev_priv)) {
-		DRM_DEBUG_DRIVER("GVT-g is disabled for guest\n");
-		goto bail;
-	}
-
-	if (!is_supported_device(dev_priv)) {
-		DRM_DEBUG_DRIVER("Unsupported device. GVT-g is disabled\n");
-		goto bail;
-	}
-
 	if (!i915.enable_execlists) {
 		DRM_INFO("GPU guest virtualisation [GVT-g] disabled due to disabled execlist submission [i915.enable_execlists module parameter]\n");
 		goto bail;