Commit 457e77b2 added two checks applied to a
value received from nv_rd32(bios, 0x619f04). But after this new piece of code
is executed, the addr local variable does not hold the same value it used to
hold before the commit. Here is what is was assigned in the original code:
	(u64)(nv_rd32(bios, 0x619f04) & 0xffffff00) << 8
in the committed code it ends up with this value:
	(u64)(nv_rd32(bios, 0x619f04) >> 8) << 8
These expressions are obviously not equivalent.

My Nvidia video card does not show anything on the display when I boot a
kernel containing this commit.

The patch fixes the code so that the new checks are still done, but the
side effect of an incorrect addr value is gone.

Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sergei Antonov <saproj@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

Merge tag 'omapdrm-fixes-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux into drm-next

Fixes for omapdrm, some of which were already present in 3.14, and some which
appeared in 3.15-rc1:

- fixes for primary-plane handling which caused crashes
- fix all kinds of uninit issues which prevented from unloading the omapdrm
  module.
- fixes for HDMI enable/disable issues

* tag 'omapdrm-fixes-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux:
  drm/omap: fix the handling of fb ref counts
  drm/omap: protect omap_crtc's event with event_lock spinlock
  drm/omap: Use old_fb to synchronize between successive page flips
  drm/omap: Fix crash when using LCD3 overlay manager
  drm/omap: gem sync: wait on correct events
  drm/omap: Fix memory leak in omap_gem_op_async
  drm/omap: remove warn from debugfs
  drm/omap: remove extra plane->destroy from crtc destroy
  drm/omap: print warning when rotating non-TILER fb
  drm/omap: fix missing unref to fb's buf object
  drm/omap: fix plane rotation
  drm/omap: fix enabling/disabling of video pipeline
  drm/omap: fix missing disable for unused encoder
  drm/omap: fix race issue when unloading omapdrm
  drm/omap: fix DMM driver (un)registration
  drm/omap: fix uninit order in pdev_remove()
  drm/omap: fix output enable/disable sequence

1. Fixing PLL regressions
2. A couple of memory reclocking and DPM fixes
3. Small cleanups

* 'drm-fixes-3.15' of git://people.freedesktop.org/~deathsimple/linux:
  drm/radeon/ci: make sure mc ucode is loaded before checking the size
  drm/radeon/si: make sure mc ucode is loaded before checking the size
  drm/radeon: improve PLL params if we don't match exactly v2
  drm/radeon: memory leak on bo reservation failure. v2
  drm/radeon: fix VCE fence command
  drm/radeon: re-enable mclk dpm on R7 260X asics
  drm/radeon: add support for newer mc ucode on CI (v2)
  drm/radeon: add support for newer mc ucode on SI (v2)
  drm/radeon: apply more strict limits for PLL params v2
  drm/radeon: update CI DPM powertune settings
  drm/radeon: fix runpm handling on APUs (v4)
  drm/radeon: disable mclk dpm on R7 260X

drm/tegra: Fixes for v3.15-rc2

This contains a fix for the host1x driver writing to non-existent syncpt
registers.

A second commit removes an excess pad field in the parameter structure
for the DRM_TEGRA_SUBMIT IOCTL. Archeaology on earlier versions of this
file indicates that this was once there to pad an uneven number of u32
u32 fields, of which one was subsequently removed. Unfortunately nobody
remembered to get rid of the padding when that happened.

Both of these commits are Cc: stable because they fix issues that were
introduced back in v3.10.

* tag 'drm/tegra/for-3.15-rc2' of git://anongit.freedesktop.org/tegra/linux:
  drm/tegra: Remove gratuitous pad field
  gpu: host1x: handle the correct # of syncpt regs

Avoid a possible segfault.
Noticed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

Avoid a possible segfault.
Noticed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

Otherwise we might be quite off on older chipsets.

v2: keep ref_div minimum
Signed-off-by: Christian König <christian.koenig@amd.com>

On bo reservation failure, we end up leaking fpriv.

v2 (chk): rebased and added missing free on vm failure as well

Fixes: 5e386b57 ("drm/radeon: fix missing bo reservation")
Cc: stable@vger.kernel.org
Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Signed-off-by: Christian König <christian.koenig@amd.com>

Due to a type mismatch that causes an implicit type conversion, the
upper 32 bits of the GPU address have been zeroed out when adding to the
command buffer.

Picked up by Coverity - CID 1198624.
Signed-off-by: Christoph Jaeger <christophjaeger@linux.com>

If the new mc ucode is available.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

Fixes mclk stability on certain asics.

v2: print out mc firmware version used and size

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=75992Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

May fix stability issues with some newer cards.

v2: print out mc firmware version used and size
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

Letting post and refernce divider get to big is bad for signal stability.

v2: increase the limit to 210
Signed-off-by: Christian König <christian.koenig@amd.com>

As per internal recommendations.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Don't try and runtime suspend the APU in PX systems.  We
only want to power down the dGPU.

v2: fix harder
v3: fix stupid typo
v4: consolidate runpm enablement to a single flag

bugs:
https://bugs.freedesktop.org/show_bug.cgi?id=75127
https://bugzilla.kernel.org/show_bug.cgi?id=72701Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

Setting higher mclks seems to cause stability issues
on some R7 260X boards.  Disable it for now for stability
until we find a proper fix.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=75992Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

The version of the drm_tegra_submit structure that was merged all the
way back in 3.10 contains a pad field that was originally intended to
properly pad the following __u64 field. Unfortunately it seems like a
different field was dropped during review that caused this padding to
become unnecessary, but the pad field wasn't removed at that time.

One possible side-effect of this is that since the __u64 following the
pad is now no longer properly aligned, the compiler may (or may not)
introduce padding itself, which results in no predictable ABI.

Rectify this by removing the pad field so that all fields are again
naturally aligned. Technically this is breaking existing userspace ABI,
but given that there aren't any (released) userspace drivers that make
use of this yet, the fallout should be minimal.

Fixes: d43f81cb ("drm/tegra: Add gr2d device")
Cc: <stable@vger.kernel.org> # 3.10
Signed-off-by: Thierry Reding <treding@nvidia.com>

BIT_WORD() truncates rather than rounds, so the loops in
syncpt_thresh_isr() and _host1x_intr_disable_all_syncpt_intrs() use <=
rather than < in an attempt to process the correct number of registers
when rounding of the conversion of count of bits to count of words is
necessary. However, when rounding isn't necessary because the value is
already a multiple of the divisor (as is the case for all values of
nb_pts the code actually sees), this causes one too many registers to
be processed.

Solve this by using and explicit DIV_ROUND_UP() call, rather than
BIT_WORD(), and comparing with < rather than <=.

Fixes: 7ede0b0b ("gpu: host1x: Add syncpoint wait and interrupts")
Cc: <stable@vger.kernel.org> # 3.10
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-By: Terje Bergstrom <tbergstrom@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

Some fixes from Intel.

* tag 'drm-intel-fixes-2014-04-11' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: Always use kref tracking for all contexts.
  drm/i915: do not setup backlight if not available according to VBT
  drm/i915: check VBT for supported backlight type
  drm/i915: Disable self-refresh for untiled fbs on i915gm
  drm/mm: Don't WARN if drm_mm_reserve_node

With the recent primary-plane changes for drm, the primary plane's
framebuffer needs to be ref counted the same way as for
non-primary-planes. This was not done by the omapdrm driver, which
caused the ref count to drop to 0 too early, causing problems.

This patch moves the fb unref and ref from omap_plane_update to
omap_plane_mode_set. This way the fb refs are updated for both primary
and non-primary cases, as omap_plane_update calls omap_plane_mode_set.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

The vblank_cb callback and the page_flip ioctl can occur together in different
CPU contexts. vblank_cb uses takes tje drm device's event_lock spinlock when
sending the vblank event and updating omap_crtc->event and omap_crtc->od_fb.

Use the same spinlock in page_flip, to make sure the above omap_crtc parameters
are configured sequentially.
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

omap_crtc->old_fb is used to check whether the previous page flip has completed
or not. However, it's never initialized to anything, so it's always NULL. This
results in the check to always succeed, and the page_flip to proceed.

Initialize old_fb to the fb that we intend to flip to through page_flip, and
therefore prevent a future page flip to proceed if the last one didn't
complete.
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

The channel_names list didn't have a string populated for LCD3 manager, this
results in a crash when the display's output is connected to LCD3. Add an entry
for LCD3.
Reported-by: Somnath Mukherjee <somnath@ti.com>
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

A waiter of the type OMAP_GEM_READ should wait for a buffer to be completely
written, and only then proceed with reading it. A similar logic applies for
waiters with OMAP_GEM_WRITE flag.

Currently the function is_waiting() waits on the read_complete/read_target
counts in the sync object.

This should be the other way round, as a reader should wait for users who are
'writing' to this buffer, and vice versa.

Make readers of the buffer(OMAP_GEM_READ) wait on the write counters, and
writers to the buffer(OMAP_GEM_WRITE) wait on the read counters in is_waiting()
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

In omap_gem_op_async(), if a waiter is not added to the wait list, it needs to
be free'd in the function itself.

Make sure we free the waiter for this case.
Signed-off-by: Subhajit Paul <subhajit_paul@ti.com>
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Patch dfe96ddc (omapdrm: simplify locking in
the fb debugfs file) removed taking locks when using omapdrm's debugfs
to dump fb objects.

However, in omap_gem_describe we give a WARN is the lock has not been
taken, so that WARN is now seen every time omapdrm debugfs is used.

So, presuming the removal of locks is ok, we can also remove the WARN.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

All the planes, including primary planes, are now destroyed by the drm
framework. Thus we no longer need the explicit call to plane->destroy
from the crtc's destroy function.

This patch removes the call, thus fixing the crash caused by double
freeing the plane.

remove omap_crtc->plane->funcs->destroy(omap_crtc->plane)
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Print a warning when the user tries to rotate a non-TILER framebuffer.

Also set the rotation to 0, to avoid constant flood of the warnings in
case of page flipping.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Pull KVM fixes from Marcelo Tosatti:
 - Fix for guest triggerable BUG_ON (CVE-2014-0155)
 - CR4.SMAP support
 - Spurious WARN_ON() fix

* git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: remove WARN_ON from get_kernel_ns()
  KVM: Rename variable smep to cr4_smep
  KVM: expose SMAP feature to guest
  KVM: Disable SMAP for guests in EPT realmode and EPT unpaging mode
  KVM: Add SMAP support when setting CR4
  KVM: Remove SMAP bit from CR4_RESERVED_BITS
  KVM: ioapic: try to recover if pending_eoi goes out of range
  KVM: ioapic: fix assignment of ioapic->rtc_status.pending_eoi (CVE-2014-0155)

Pull bmc2835 crypto fix from Herbert Xu:
 "This fixes a potential boot crash on bcm2835 due to the recent change
  that now causes hardware RNGs to be accessed on registration"

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  hwrng: bcm2835 - fix oops when rng h/w is accessed during registration

smp_read_barrier_depends() can be used if there is data dependency between
the readers - i.e. if the read operation after the barrier uses address
that was obtained from the read operation before the barrier.

In this file, there is only control dependency, no data dependecy, so the
use of smp_read_barrier_depends() is incorrect. The code could fail in the
following way:
* the cpu predicts that idx < entries is true and starts executing the
  body of the for loop
* the cpu fetches map->extent[0].first and map->extent[0].count
* the cpu fetches map->nr_extents
* the cpu verifies that idx < extents is true, so it commits the
  instructions in the body of the for loop

The problem is that in this scenario, the cpu read map->extent[0].first
and map->nr_extents in the wrong order. We need a full read memory barrier
to prevent it.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Function and callers can be preempted.

https://bugzilla.kernel.org/show_bug.cgi?id=73721Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>

Rename variable smep to cr4_smep, which can better reflect the
meaning of the variable.
Signed-off-by: Feng Wu <feng.wu@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

This patch exposes SMAP feature to guest
Signed-off-by: Feng Wu <feng.wu@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

SMAP is disabled if CPU is in non-paging mode in hardware.
However KVM always uses paging mode to emulate guest non-paging
mode with TDP. To emulate this behavior, SMAP needs to be
manually disabled when guest switches to non-paging mode.
Signed-off-by: Feng Wu <feng.wu@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

This patch adds SMAP handling logic when setting CR4 for guests

Thanks a lot to Paolo Bonzini for his suggestion to use the branchless
way to detect SMAP violation.
Signed-off-by: Feng Wu <feng.wu@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

This patch removes SMAP bit from CR4_RESERVED_BITS.
Signed-off-by: Feng Wu <feng.wu@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

omap_fbdev_create() takes a reference to the fb's gem object with
omap_gem_get_paddr(). However, it never releases it with
omap_gem_put_paddr().

This patch adds the missing omap_gem_put_paddr() to omap_fbdev_free().
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Plane rotation with omapdrm is currently broken.
It seems omap_plane_mode_set() expects width and height in screen
coordinates, so pass it like that.
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

At the moment the omap_crtc_pre_apply() handles the enabling, disabling
and configuring of encoders and panels separately from the CRTC (i.e.
the overlay manager).

However, this doesn't work correctly. The encoder driver has to be in
control of its video input (i.e. the crtc) for correct operation.

This problem causes bugs with (at least) HDMI: the HDMI encoder supplies
pixel clock for DISPC, and DISPC supplies video stream for HDMI. The
current code first enables the HDMI encoder, and CRTC after that.
However, the encoder expects the video stream to start during the
encoder's enable, and if it doesn't, there will be sync lost errors.

The encoder enables its video source by calling src->enable(), and this
call goes to omapdrm (omap_crtc_enable), but omapdrm doesn't do anything
in that function. Similarly for disable, which goes to
omap_crtc_disable().

This patch moves the code to setup and enable/disable the crtc to
omap_crtc_enable. and omap_crtc_disable().
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>