diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 8c688a5f1589..204dc7c0b2d6 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -925,6 +925,14 @@ int i915_gem_context_getparam_ioctl(struct drm_device *dev, void *data,
 	case I915_CONTEXT_PARAM_NO_ZEROMAP:
 		args->value = ctx->flags & CONTEXT_NO_ZEROMAP;
 		break;
+	case I915_CONTEXT_PARAM_GTT_SIZE:
+		if (ctx->ppgtt)
+			args->value = ctx->ppgtt->base.total;
+		else if (to_i915(dev)->mm.aliasing_ppgtt)
+			args->value = to_i915(dev)->mm.aliasing_ppgtt->base.total;
+		else
+			args->value = to_i915(dev)->gtt.base.total;
+		break;
 	default:
 		ret = -EINVAL;
 		break;
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 484a9fb20479..67cebe6d978f 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -1125,8 +1125,9 @@ struct drm_i915_gem_context_param {
 	__u32 ctx_id;
 	__u32 size;
 	__u64 param;
-#define I915_CONTEXT_PARAM_BAN_PERIOD 0x1
-#define I915_CONTEXT_PARAM_NO_ZEROMAP 0x2
+#define I915_CONTEXT_PARAM_BAN_PERIOD	0x1
+#define I915_CONTEXT_PARAM_NO_ZEROMAP	0x2
+#define I915_CONTEXT_PARAM_GTT_SIZE	0x3
 	__u64 value;
 };