diff mbox

[v2] drm: Turn off Legacy Context Functions

Message ID 1435043929-4872-1-git-send-email-peter.antoine@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Peter Antoine June 23, 2015, 7:18 a.m. UTC 
The context functions are not used by the i915 driver and should not
be used by modeset drivers. These driver functions contain several bugs
and security holes. This change makes these functions optional can be
turned on by a setting, they are turned off by default for modeset
driver with the exception of the Nova driver that may require them with
an old version of libdrm.

v2: remove returns from void function, and formatting (Daniel Vetter)

Signed-off-by: Peter Antoine <peter.antoine@intel.com>
---
 drivers/gpu/drm/drm_context.c         | 48 +++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/drm_drv.c             | 13 ++++++----
 drivers/gpu/drm/drm_lock.c            |  8 ++++++
 drivers/gpu/drm/nouveau/nouveau_drm.c |  3 ++-
 include/drm/drmP.h                    | 23 +++++++++--------
 5 files changed, 78 insertions(+), 17 deletions(-)

Comments

Daniel Vetter June 23, 2015, 9:38 a.m. UTC | #1 
On Tue, Jun 23, 2015 at 08:18:49AM +0100, Peter Antoine wrote:
> The context functions are not used by the i915 driver and should not
> be used by modeset drivers. These driver functions contain several bugs
> and security holes. This change makes these functions optional can be
> turned on by a setting, they are turned off by default for modeset
> driver with the exception of the Nova driver that may require them with
> an old version of libdrm.
> 
> v2: remove returns from void function, and formatting (Daniel Vetter)
> 
> Signed-off-by: Peter Antoine <peter.antoine@intel.com>

dri-devel wasn't cc'd on this version. And I also spotted a few other
things to improve/polish, most of which was mentioned in earlier revision.
I amended your patch with 2 more of mine and resubmitted them. Can you pls
take a quick look and r-b stampe the entire pile?

Thanks, Daniel

> ---
>  drivers/gpu/drm/drm_context.c         | 48 +++++++++++++++++++++++++++++++++++
>  drivers/gpu/drm/drm_drv.c             | 13 ++++++----
>  drivers/gpu/drm/drm_lock.c            |  8 ++++++
>  drivers/gpu/drm/nouveau/nouveau_drm.c |  3 ++-
>  include/drm/drmP.h                    | 23 +++++++++--------
>  5 files changed, 78 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_context.c b/drivers/gpu/drm/drm_context.c
> index 9b23525..32958da 100644
> --- a/drivers/gpu/drm/drm_context.c
> +++ b/drivers/gpu/drm/drm_context.c
> @@ -53,6 +53,10 @@ struct drm_ctx_list {
>   */
>  void drm_legacy_ctxbitmap_free(struct drm_device * dev, int ctx_handle)
>  {
> +	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
> +	    drm_core_check_feature(dev, DRIVER_MODESET))
> +		return;
> +
>  	mutex_lock(&dev->struct_mutex);
>  	idr_remove(&dev->ctx_idr, ctx_handle);
>  	mutex_unlock(&dev->struct_mutex);
> @@ -87,6 +91,10 @@ static int drm_legacy_ctxbitmap_next(struct drm_device * dev)
>   */
>  int drm_legacy_ctxbitmap_init(struct drm_device * dev)
>  {
> +	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
> +	    drm_core_check_feature(dev, DRIVER_MODESET))
> +		return -EINVAL;
> +
>  	idr_init(&dev->ctx_idr);
>  	return 0;
>  }
> @@ -101,6 +109,10 @@ int drm_legacy_ctxbitmap_init(struct drm_device * dev)
>   */
>  void drm_legacy_ctxbitmap_cleanup(struct drm_device * dev)
>  {
> +	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
> +	    drm_core_check_feature(dev, DRIVER_MODESET))
> +		return;
> +
>  	mutex_lock(&dev->struct_mutex);
>  	idr_destroy(&dev->ctx_idr);
>  	mutex_unlock(&dev->struct_mutex);
> @@ -119,6 +131,10 @@ void drm_legacy_ctxbitmap_flush(struct drm_device *dev, struct drm_file *file)
>  {
>  	struct drm_ctx_list *pos, *tmp;
>  
> +	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
> +	    drm_core_check_feature(dev, DRIVER_MODESET))
> +		return;
> +
>  	mutex_lock(&dev->ctxlist_mutex);
>  
>  	list_for_each_entry_safe(pos, tmp, &dev->ctxlist, head) {
> @@ -161,6 +177,10 @@ int drm_legacy_getsareactx(struct drm_device *dev, void *data,
>  	struct drm_local_map *map;
>  	struct drm_map_list *_entry;
>  
> +	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
> +	    drm_core_check_feature(dev, DRIVER_MODESET))
> +		return -EINVAL;
> +
>  	mutex_lock(&dev->struct_mutex);
>  
>  	map = idr_find(&dev->ctx_idr, request->ctx_id);
> @@ -205,6 +225,10 @@ int drm_legacy_setsareactx(struct drm_device *dev, void *data,
>  	struct drm_local_map *map = NULL;
>  	struct drm_map_list *r_list = NULL;
>  
> +	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
> +	    drm_core_check_feature(dev, DRIVER_MODESET))
> +		return -EINVAL;
> +
>  	mutex_lock(&dev->struct_mutex);
>  	list_for_each_entry(r_list, &dev->maplist, head) {
>  		if (r_list->map
> @@ -305,6 +329,10 @@ int drm_legacy_resctx(struct drm_device *dev, void *data,
>  	struct drm_ctx ctx;
>  	int i;
>  
> +	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
> +	    drm_core_check_feature(dev, DRIVER_MODESET))
> +		return -EINVAL;
> +
>  	if (res->count >= DRM_RESERVED_CONTEXTS) {
>  		memset(&ctx, 0, sizeof(ctx));
>  		for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
> @@ -335,6 +363,10 @@ int drm_legacy_addctx(struct drm_device *dev, void *data,
>  	struct drm_ctx_list *ctx_entry;
>  	struct drm_ctx *ctx = data;
>  
> +	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
> +	    drm_core_check_feature(dev, DRIVER_MODESET))
> +		return -EINVAL;
> +
>  	ctx->handle = drm_legacy_ctxbitmap_next(dev);
>  	if (ctx->handle == DRM_KERNEL_CONTEXT) {
>  		/* Skip kernel's context and get a new one. */
> @@ -378,6 +410,10 @@ int drm_legacy_getctx(struct drm_device *dev, void *data,
>  {
>  	struct drm_ctx *ctx = data;
>  
> +	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
> +	    drm_core_check_feature(dev, DRIVER_MODESET))
> +		return -EINVAL;
> +
>  	/* This is 0, because we don't handle any context flags */
>  	ctx->flags = 0;
>  
> @@ -400,6 +436,10 @@ int drm_legacy_switchctx(struct drm_device *dev, void *data,
>  {
>  	struct drm_ctx *ctx = data;
>  
> +	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
> +	    drm_core_check_feature(dev, DRIVER_MODESET))
> +		return -EINVAL;
> +
>  	DRM_DEBUG("%d\n", ctx->handle);
>  	return drm_context_switch(dev, dev->last_context, ctx->handle);
>  }
> @@ -420,6 +460,10 @@ int drm_legacy_newctx(struct drm_device *dev, void *data,
>  {
>  	struct drm_ctx *ctx = data;
>  
> +	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
> +	    drm_core_check_feature(dev, DRIVER_MODESET))
> +		return -EINVAL;
> +
>  	DRM_DEBUG("%d\n", ctx->handle);
>  	drm_context_switch_complete(dev, file_priv, ctx->handle);
>  
> @@ -442,6 +486,10 @@ int drm_legacy_rmctx(struct drm_device *dev, void *data,
>  {
>  	struct drm_ctx *ctx = data;
>  
> +	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
> +	    drm_core_check_feature(dev, DRIVER_MODESET))
> +		return -EINVAL;
> +
>  	DRM_DEBUG("%d\n", ctx->handle);
>  	if (ctx->handle != DRM_KERNEL_CONTEXT) {
>  		if (dev->driver->context_dtor)
> diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
> index 3b3c4f5..e571711 100644
> --- a/drivers/gpu/drm/drm_drv.c
> +++ b/drivers/gpu/drm/drm_drv.c
> @@ -584,11 +584,14 @@ struct drm_device *drm_dev_alloc(struct drm_driver *driver,
>  	if (drm_ht_create(&dev->map_hash, 12))
>  		goto err_minors;
>  
> -	ret = drm_legacy_ctxbitmap_init(dev);
> -	if (ret) {
> -		DRM_ERROR("Cannot allocate memory for context bitmap.\n");
> -		goto err_ht;
> -	}
> +	if (drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) ||
> +		!drm_core_check_feature(dev, DRIVER_MODESET))
> +		ret = drm_legacy_ctxbitmap_init(dev);
> +		if (ret) {
> +			DRM_ERROR(
> +				"Cannot allocate memory for context bitmap.\n");
> +			goto err_ht;
> +		}
>  
>  	if (drm_core_check_feature(dev, DRIVER_GEM)) {
>  		ret = drm_gem_init(dev);
> diff --git a/drivers/gpu/drm/drm_lock.c b/drivers/gpu/drm/drm_lock.c
> index f861361..e73687e 100644
> --- a/drivers/gpu/drm/drm_lock.c
> +++ b/drivers/gpu/drm/drm_lock.c
> @@ -61,6 +61,10 @@ int drm_legacy_lock(struct drm_device *dev, void *data,
>  	struct drm_master *master = file_priv->master;
>  	int ret = 0;
>  
> +	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
> +		drm_core_check_feature(dev, DRIVER_MODESET))
> +		return -EINVAL;
> +
>  	++file_priv->lock_count;
>  
>  	if (lock->context == DRM_KERNEL_CONTEXT) {
> @@ -153,6 +157,10 @@ int drm_legacy_unlock(struct drm_device *dev, void *data, struct drm_file *file_
>  	struct drm_lock *lock = data;
>  	struct drm_master *master = file_priv->master;
>  
> +	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
> +		drm_core_check_feature(dev, DRIVER_MODESET))
> +		return -EINVAL;
> +
>  	if (lock->context == DRM_KERNEL_CONTEXT) {
>  		DRM_ERROR("Process %d using kernel context %d\n",
>  			  task_pid_nr(current), lock->context);
> diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
> index 8904933..9624b38 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_drm.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
> @@ -941,7 +941,8 @@ static struct drm_driver
>  driver_stub = {
>  	.driver_features =
>  		DRIVER_USE_AGP |
> -		DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_RENDER,
> +		DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_RENDER |
> +		DRIVER_KMS_LEGACY_CONTEXT,
>  
>  	.load = nouveau_drm_load,
>  	.unload = nouveau_drm_unload,
> diff --git a/include/drm/drmP.h b/include/drm/drmP.h
> index 9fa6366..654ed7c 100644
> --- a/include/drm/drmP.h
> +++ b/include/drm/drmP.h
> @@ -137,17 +137,18 @@ void drm_err(const char *format, ...);
>  /*@{*/
>  
>  /* driver capabilities and requirements mask */
> -#define DRIVER_USE_AGP     0x1
> -#define DRIVER_PCI_DMA     0x8
> -#define DRIVER_SG          0x10
> -#define DRIVER_HAVE_DMA    0x20
> -#define DRIVER_HAVE_IRQ    0x40
> -#define DRIVER_IRQ_SHARED  0x80
> -#define DRIVER_GEM         0x1000
> -#define DRIVER_MODESET     0x2000
> -#define DRIVER_PRIME       0x4000
> -#define DRIVER_RENDER      0x8000
> -#define DRIVER_ATOMIC      0x10000
> +#define DRIVER_USE_AGP			0x1
> +#define DRIVER_PCI_DMA			0x8
> +#define DRIVER_SG			0x10
> +#define DRIVER_HAVE_DMA			0x20
> +#define DRIVER_HAVE_IRQ			0x40
> +#define DRIVER_IRQ_SHARED		0x80
> +#define DRIVER_GEM			0x1000
> +#define DRIVER_MODESET			0x2000
> +#define DRIVER_PRIME			0x4000
> +#define DRIVER_RENDER			0x8000
> +#define DRIVER_ATOMIC			0x10000
> +#define DRIVER_KMS_LEGACY_CONTEXT	0x20000
>  
>  /***********************************************************************/
>  /** \name Macros to make printk easier */
> -- 
> 1.9.1
>
diff mbox

Patch

diff --git a/drivers/gpu/drm/drm_context.c b/drivers/gpu/drm/drm_context.c
index 9b23525..32958da 100644
--- a/drivers/gpu/drm/drm_context.c
+++ b/drivers/gpu/drm/drm_context.c
@@ -53,6 +53,10 @@  struct drm_ctx_list {
  */
 void drm_legacy_ctxbitmap_free(struct drm_device * dev, int ctx_handle)
 {
+	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+	    drm_core_check_feature(dev, DRIVER_MODESET))
+		return;
+
 	mutex_lock(&dev->struct_mutex);
 	idr_remove(&dev->ctx_idr, ctx_handle);
 	mutex_unlock(&dev->struct_mutex);
@@ -87,6 +91,10 @@  static int drm_legacy_ctxbitmap_next(struct drm_device * dev)
  */
 int drm_legacy_ctxbitmap_init(struct drm_device * dev)
 {
+	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+	    drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
 	idr_init(&dev->ctx_idr);
 	return 0;
 }
@@ -101,6 +109,10 @@  int drm_legacy_ctxbitmap_init(struct drm_device * dev)
  */
 void drm_legacy_ctxbitmap_cleanup(struct drm_device * dev)
 {
+	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+	    drm_core_check_feature(dev, DRIVER_MODESET))
+		return;
+
 	mutex_lock(&dev->struct_mutex);
 	idr_destroy(&dev->ctx_idr);
 	mutex_unlock(&dev->struct_mutex);
@@ -119,6 +131,10 @@  void drm_legacy_ctxbitmap_flush(struct drm_device *dev, struct drm_file *file)
 {
 	struct drm_ctx_list *pos, *tmp;
 
+	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+	    drm_core_check_feature(dev, DRIVER_MODESET))
+		return;
+
 	mutex_lock(&dev->ctxlist_mutex);
 
 	list_for_each_entry_safe(pos, tmp, &dev->ctxlist, head) {
@@ -161,6 +177,10 @@  int drm_legacy_getsareactx(struct drm_device *dev, void *data,
 	struct drm_local_map *map;
 	struct drm_map_list *_entry;
 
+	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+	    drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
 	mutex_lock(&dev->struct_mutex);
 
 	map = idr_find(&dev->ctx_idr, request->ctx_id);
@@ -205,6 +225,10 @@  int drm_legacy_setsareactx(struct drm_device *dev, void *data,
 	struct drm_local_map *map = NULL;
 	struct drm_map_list *r_list = NULL;
 
+	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+	    drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
 	mutex_lock(&dev->struct_mutex);
 	list_for_each_entry(r_list, &dev->maplist, head) {
 		if (r_list->map
@@ -305,6 +329,10 @@  int drm_legacy_resctx(struct drm_device *dev, void *data,
 	struct drm_ctx ctx;
 	int i;
 
+	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+	    drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
 	if (res->count >= DRM_RESERVED_CONTEXTS) {
 		memset(&ctx, 0, sizeof(ctx));
 		for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
@@ -335,6 +363,10 @@  int drm_legacy_addctx(struct drm_device *dev, void *data,
 	struct drm_ctx_list *ctx_entry;
 	struct drm_ctx *ctx = data;
 
+	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+	    drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
 	ctx->handle = drm_legacy_ctxbitmap_next(dev);
 	if (ctx->handle == DRM_KERNEL_CONTEXT) {
 		/* Skip kernel's context and get a new one. */
@@ -378,6 +410,10 @@  int drm_legacy_getctx(struct drm_device *dev, void *data,
 {
 	struct drm_ctx *ctx = data;
 
+	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+	    drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
 	/* This is 0, because we don't handle any context flags */
 	ctx->flags = 0;
 
@@ -400,6 +436,10 @@  int drm_legacy_switchctx(struct drm_device *dev, void *data,
 {
 	struct drm_ctx *ctx = data;
 
+	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+	    drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
 	DRM_DEBUG("%d\n", ctx->handle);
 	return drm_context_switch(dev, dev->last_context, ctx->handle);
 }
@@ -420,6 +460,10 @@  int drm_legacy_newctx(struct drm_device *dev, void *data,
 {
 	struct drm_ctx *ctx = data;
 
+	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+	    drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
 	DRM_DEBUG("%d\n", ctx->handle);
 	drm_context_switch_complete(dev, file_priv, ctx->handle);
 
@@ -442,6 +486,10 @@  int drm_legacy_rmctx(struct drm_device *dev, void *data,
 {
 	struct drm_ctx *ctx = data;
 
+	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+	    drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
 	DRM_DEBUG("%d\n", ctx->handle);
 	if (ctx->handle != DRM_KERNEL_CONTEXT) {
 		if (dev->driver->context_dtor)
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 3b3c4f5..e571711 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -584,11 +584,14 @@  struct drm_device *drm_dev_alloc(struct drm_driver *driver,
 	if (drm_ht_create(&dev->map_hash, 12))
 		goto err_minors;
 
-	ret = drm_legacy_ctxbitmap_init(dev);
-	if (ret) {
-		DRM_ERROR("Cannot allocate memory for context bitmap.\n");
-		goto err_ht;
-	}
+	if (drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) ||
+		!drm_core_check_feature(dev, DRIVER_MODESET))
+		ret = drm_legacy_ctxbitmap_init(dev);
+		if (ret) {
+			DRM_ERROR(
+				"Cannot allocate memory for context bitmap.\n");
+			goto err_ht;
+		}
 
 	if (drm_core_check_feature(dev, DRIVER_GEM)) {
 		ret = drm_gem_init(dev);
diff --git a/drivers/gpu/drm/drm_lock.c b/drivers/gpu/drm/drm_lock.c
index f861361..e73687e 100644
--- a/drivers/gpu/drm/drm_lock.c
+++ b/drivers/gpu/drm/drm_lock.c
@@ -61,6 +61,10 @@  int drm_legacy_lock(struct drm_device *dev, void *data,
 	struct drm_master *master = file_priv->master;
 	int ret = 0;
 
+	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+		drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
 	++file_priv->lock_count;
 
 	if (lock->context == DRM_KERNEL_CONTEXT) {
@@ -153,6 +157,10 @@  int drm_legacy_unlock(struct drm_device *dev, void *data, struct drm_file *file_
 	struct drm_lock *lock = data;
 	struct drm_master *master = file_priv->master;
 
+	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+		drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
 	if (lock->context == DRM_KERNEL_CONTEXT) {
 		DRM_ERROR("Process %d using kernel context %d\n",
 			  task_pid_nr(current), lock->context);
diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index 8904933..9624b38 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -941,7 +941,8 @@  static struct drm_driver
 driver_stub = {
 	.driver_features =
 		DRIVER_USE_AGP |
-		DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_RENDER,
+		DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_RENDER |
+		DRIVER_KMS_LEGACY_CONTEXT,
 
 	.load = nouveau_drm_load,
 	.unload = nouveau_drm_unload,
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 9fa6366..654ed7c 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -137,17 +137,18 @@  void drm_err(const char *format, ...);
 /*@{*/
 
 /* driver capabilities and requirements mask */
-#define DRIVER_USE_AGP     0x1
-#define DRIVER_PCI_DMA     0x8
-#define DRIVER_SG          0x10
-#define DRIVER_HAVE_DMA    0x20
-#define DRIVER_HAVE_IRQ    0x40
-#define DRIVER_IRQ_SHARED  0x80
-#define DRIVER_GEM         0x1000
-#define DRIVER_MODESET     0x2000
-#define DRIVER_PRIME       0x4000
-#define DRIVER_RENDER      0x8000
-#define DRIVER_ATOMIC      0x10000
+#define DRIVER_USE_AGP			0x1
+#define DRIVER_PCI_DMA			0x8
+#define DRIVER_SG			0x10
+#define DRIVER_HAVE_DMA			0x20
+#define DRIVER_HAVE_IRQ			0x40
+#define DRIVER_IRQ_SHARED		0x80
+#define DRIVER_GEM			0x1000
+#define DRIVER_MODESET			0x2000
+#define DRIVER_PRIME			0x4000
+#define DRIVER_RENDER			0x8000
+#define DRIVER_ATOMIC			0x10000
+#define DRIVER_KMS_LEGACY_CONTEXT	0x20000
 
 /***********************************************************************/
 /** \name Macros to make printk easier */