linux_dsm_epyc7002/drivers/gpu/drm
David Herrmann b28cd41f9e drm/crtc: add sanity checks to create_dumb()
Lets make sure some basic expressions are always true:
  bpp != NULL
  width != NULL
  height != NULL
  stride = bpp * width < 2^32
  size = stride * height < 2^32
  PAGE_ALIGN(size) < 2^32

At least the udl driver doesn't check for multiplication-overflows, so
lets just make sure it will never happen. These checks allow drivers to do
any 32bit math without having to test for mult-overflows themselves.

The two divisions might hurt performance a bit, but dumb_create() is only
used for scanout-buffers, so that should be fine. We could use 64bit math
to avoid the divisions, but that may be slow on 32bit machines.. Or maybe
there should just be a "safe_mult32()" helper, which currently doesn't
exist (I think?).

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
2014-03-16 12:11:01 +01:00
..
armada Merge branch 'drm-armada-fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-cubox into drm-next 2014-01-29 09:38:32 +10:00
ast drm/mgag200,ast,cirrus: fix regression with drm_can_sleep conversion 2014-02-06 11:39:03 +10:00
bochs
cirrus drm/mgag200,ast,cirrus: fix regression with drm_can_sleep conversion 2014-02-06 11:39:03 +10:00
exynos drm/exynos: Convert to use the standard hdmi.h header 2014-02-07 10:48:12 +09:00
gma500 Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2014-01-29 20:49:12 -08:00
i2c drm/i2c: tda998x: always use the same device for all kernel messages 2014-02-14 20:11:12 +00:00
i810
i915 Merge tag 'drm-intel-next-2014-02-14' of ssh://git.freedesktop.org/git/drm-intel into drm-next 2014-03-04 07:51:41 +10:00
mga drivers: gpu: Include appropriate header file in mga_ioc32.c 2014-01-14 12:59:24 +10:00
mgag200 drm/mgag200,ast,cirrus: fix regression with drm_can_sleep conversion 2014-02-06 11:39:03 +10:00
msm Merge branch 'msm-next' of git://people.freedesktop.org/~robclark/linux into drm-next 2014-02-11 12:56:17 +10:00
nouveau ACPI and power management fixes for 3.14-rc4 2014-02-21 10:01:17 -08:00
omapdrm omapdrm patches for 3.14 2014-01-29 09:37:47 +10:00
panel drm/panel: update EDID BLOB in panel_simple_get_modes() 2014-01-14 16:02:02 +01:00
qxl Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2014-01-29 20:49:12 -08:00
r128 drivers: gpu: Include appropriate header file in r128_ioc32.c 2014-01-14 13:05:37 +10:00
radeon drm/radeon: remove struct radeon_bo_list 2014-03-04 14:34:34 +01:00
rcar-du
savage
shmobile
sis drivers: gpu: Mark function as static in sis_drv.c 2014-01-14 13:04:33 +10:00
tdfx
tegra drm/tegra: Changes for v3.14-rc1 (update) 2014-01-29 12:03:56 +10:00
tilcdc
ttm drm/ttm: Fix memory leak in ttm_agp_backend.c 2014-02-18 14:03:32 +01:00
udl drm/udl: fix Bpp calculation in dumb_create() 2014-03-16 12:11:01 +01:00
via drivers: gpu: Mark function as static in via_drv.c 2014-01-14 13:05:00 +10:00
vmwgfx drm/vmwgfx: Fix command defines and checks 2014-02-12 19:31:45 +01:00
ati_pcigart.c
drm_agpsupport.c
drm_auth.c
drm_buffer.c
drm_bufs.c
drm_cache.c
drm_context.c
drm_crtc_helper.c drm/tegra: Changes for v3.14-rc1 (update) 2014-01-29 12:03:56 +10:00
drm_crtc.c drm/crtc: add sanity checks to create_dumb() 2014-03-16 12:11:01 +01:00
drm_debugfs.c
drm_dma.c
drm_dp_helper.c drm/dp: Allow registering AUX channels as I2C busses 2014-02-26 17:21:34 +01:00
drm_drv.c
drm_edid_load.c
drm_edid.c drm/edid: Populate picture aspect ratio for CEA modes 2014-01-20 18:32:21 +01:00
drm_encoder_slave.c
drm_fb_cma_helper.c
drm_fb_helper.c drm: export cmdline and preferred mode functions from fb helper 2014-02-12 23:42:16 +01:00
drm_flip_work.c
drm_fops.c
drm_gem_cma_helper.c
drm_gem.c drm/gem: free vma-node during object-cleanup 2014-03-16 12:11:01 +01:00
drm_global.c
drm_hashtab.c
drm_info.c
drm_ioc32.c
drm_ioctl.c drm: add DRM_CAPs for cursor size 2014-02-18 13:41:01 -05:00
drm_irq.c drm/radeon: Move the early vblank IRQ fixup to radeon_get_crtc_scanoutpos() 2014-01-20 12:21:35 +02:00
drm_lock.c
drm_memory.c
drm_mipi_dsi.c
drm_mm.c
drm_modes.c
drm_panel.c
drm_pci.c
drm_platform.c
drm_prime.c
drm_rect.c
drm_scatter.c
drm_stub.c Merge branch 'drm-intel-next' of git://people.freedesktop.org/~danvet/drm-intel into drm-next 2014-01-20 10:21:54 +10:00
drm_sysfs.c
drm_trace_points.c
drm_trace.h
drm_usb.c
drm_vm.c
drm_vma_manager.c
Kconfig
Makefile
README.drm

************************************************************
* For the very latest on DRI development, please see:      *
*     http://dri.freedesktop.org/                          *
************************************************************

The Direct Rendering Manager (drm) is a device-independent kernel-level
device driver that provides support for the XFree86 Direct Rendering
Infrastructure (DRI).

The DRM supports the Direct Rendering Infrastructure (DRI) in four major
ways:

    1. The DRM provides synchronized access to the graphics hardware via
       the use of an optimized two-tiered lock.

    2. The DRM enforces the DRI security policy for access to the graphics
       hardware by only allowing authenticated X11 clients access to
       restricted regions of memory.

    3. The DRM provides a generic DMA engine, complete with multiple
       queues and the ability to detect the need for an OpenGL context
       switch.

    4. The DRM is extensible via the use of small device-specific modules
       that rely extensively on the API exported by the DRM module.


Documentation on the DRI is available from:
    http://dri.freedesktop.org/wiki/Documentation
    http://sourceforge.net/project/showfiles.php?group_id=387
    http://dri.sourceforge.net/doc/

For specific information about kernel-level support, see:

    The Direct Rendering Manager, Kernel Support for the Direct Rendering
    Infrastructure
    http://dri.sourceforge.net/doc/drm_low_level.html

    Hardware Locking for the Direct Rendering Infrastructure
    http://dri.sourceforge.net/doc/hardware_locking_low_level.html

    A Security Analysis of the Direct Rendering Infrastructure
    http://dri.sourceforge.net/doc/security_low_level.html