linux/drivers/gpu/drm/cirrus
David Herrmann acb4652703 drm: verify vma access in TTM+GEM drivers
GEM does already a good job in tracking access to gem buffers via handles
and drm_vma access management. However, TTM drivers currently do not
verify this during mmap().

TTM provides the verify_access() callback to test this. So fix all drivers
to actually call into gem+vma to verify access instead of always returning
0.

All drivers assume that user-space can only get access to TTM buffers via
GEM handles. So whenever the verify_access() callback is called from
ttm_bo_mmap(), the buffer must have a valid embedded gem object. This is
true for all TTM+GEM drivers. But that's why this patch doesn't touch pure
TTM drivers (ie, vmwgfx).

v2: Switch to drm_vma_node_verify_access() to correctly return -EACCES if
    access was denied.

Cc: Dave Airlie <airlied@redhat.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-08-27 11:54:58 +10:00
..
cirrus_drv.c drm: rip out drm_core_has_MTRR checks 2013-08-19 14:11:44 +10:00
cirrus_drv.h drm/gem: create drm_gem_dumb_destroy 2013-08-07 09:59:24 +10:00
cirrus_fbdev.c drm/cirrus: do not attempt to acquire a reservation while in an interrupt handler 2013-06-28 11:56:30 +10:00
cirrus_main.c drm/gem: create drm_gem_dumb_destroy 2013-08-07 09:59:24 +10:00
cirrus_mode.c UAPI: (Scripted) Convert #include "..." to #include <path/...> in drivers/gpu/ 2012-10-02 18:01:07 +01:00
cirrus_ttm.c drm: verify vma access in TTM+GEM drivers 2013-08-27 11:54:58 +10:00
Kconfig drivers/gpu/drm/cirrus: remove depends on CONFIG_EXPERIMENTAL 2013-01-17 12:11:26 -08:00
Makefile drm/kms: driver for virtual cirrus under qemu 2012-05-17 11:02:24 +01:00