diff options
| author | Dave Airlie <airlied@redhat.com> | 2019-04-18 16:45:15 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2019-04-24 12:32:10 +1000 |
| commit | b30a43ac7132cdda833ac4b13dd1ebd35ace14b7 (patch) | |
| tree | ac7688bee66a9e6e6406e931554e9c5a543f0a6a /drivers | |
| parent | dbb92471674a48892f5e50779425e03388073ab9 (diff) | |
drm/nouveau: add kconfig option to turn off nouveau legacy contexts. (v3)
There was a nouveau DDX that relied on legacy context ioctls to work,
but we fixed it years ago, give distros that have a modern DDX the
option to break the uAPI and close the mess of holes that legacy
context support is.
Full context of the story:
commit 0e975980d435d58df2d430d688b8c18778b42218
Author: Peter Antoine <peter.antoine@intel.com>
Date: Tue Jun 23 08:18:49 2015 +0100
drm: Turn off Legacy Context Functions
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 nouvea driver that may require them with
an old version of libdrm.
The previous attempt was
commit 7c510133d93dd6f15ca040733ba7b2891ed61fd1
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Thu Aug 8 15:41:21 2013 +0200
drm: mark context support as a legacy subsystem
but this had to be reverted
commit c21eb21cb50d58e7cbdcb8b9e7ff68b85cfa5095
Author: Dave Airlie <airlied@redhat.com>
Date: Fri Sep 20 08:32:59 2013 +1000
Revert "drm: mark context support as a legacy subsystem"
v2: remove returns from void function, and formatting (Daniel Vetter)
v3:
- s/Nova/nouveau/ in the commit message, and add references to the
previous attempts
- drop the part touching the drm hw lock, that should be a separate
patch.
Signed-off-by: Peter Antoine <peter.antoine@intel.com> (v2)
Cc: Peter Antoine <peter.antoine@intel.com> (v2)
Reviewed-by: Peter Antoine <peter.antoine@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
v2: move DRM_VM dependency into legacy config.
v3: fix missing dep (kbuild robot)
Cc: stable@vger.kernel.org
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/nouveau/Kconfig | 13 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_drm.c | 7 |
2 files changed, 17 insertions, 3 deletions
diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig index 00cd9ab8948d..db28012dbf54 100644 --- a/drivers/gpu/drm/nouveau/Kconfig +++ b/drivers/gpu/drm/nouveau/Kconfig @@ -17,10 +17,21 @@ config DRM_NOUVEAU select INPUT if ACPI && X86 select THERMAL if ACPI && X86 select ACPI_VIDEO if ACPI && X86 - select DRM_VM help Choose this option for open-source NVIDIA support. +config NOUVEAU_LEGACY_CTX_SUPPORT + bool "Nouveau legacy context support" + depends on DRM_NOUVEAU + select DRM_VM + default y + help + There was a version of the nouveau DDX that relied on legacy + ctx ioctls not erroring out. But that was back in time a long + ways, so offer a way to disable it now. For uapi compat with + old nouveau ddx this should be on by default, but modern distros + should consider turning it off. + config NOUVEAU_PLATFORM_DRIVER bool "Nouveau (NVIDIA) SoC GPUs" depends on DRM_NOUVEAU && ARCH_TEGRA diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index 5020265bfbd9..6ab9033f49da 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -1094,8 +1094,11 @@ nouveau_driver_fops = { static struct drm_driver driver_stub = { .driver_features = - DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_RENDER | - DRIVER_KMS_LEGACY_CONTEXT, + DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_RENDER +#if defined(CONFIG_NOUVEAU_LEGACY_CTX_SUPPORT) + | DRIVER_KMS_LEGACY_CONTEXT +#endif + , .open = nouveau_drm_open, .postclose = nouveau_drm_postclose, |