Dave Airlie [Tue, 4 Oct 2016 02:43:31 +0000 (12:43 +1000)]
Merge branch 'exynos-drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-next
This pull request includes,
- Code refactoring on HDMI DDC and PHY.
- Regression fixup on deadlock issue with G2D pm integration.
- Fixup on page fault issue with wait_for_vblank mechianism specific to Exynos drm.
- And some cleanups.
* 'exynos-drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
drm/exynos: g2d: simplify g2d_free_runqueue_node()
drm/exynos: g2d: use autosuspend mode for PM runtime
drm/exynos: g2d: wait for engine to finish
drm/exynos: g2d: remove runqueue nodes in g2d_{close,remove}()
drm/exynos: g2d: move PM management to runqueue worker
Revert "drm/exynos: g2d: fix system and runtime pm integration"
drm/exynos: use drm core to handle page-flip event
drm/exynos: mark exynos_dp_crtc_clock_enable() static
drm/exynos/fimd: add clock rate checking
drm/exynos: fix pending update handling
drm/exynos/vidi: use timer for vblanks instead of sleeping worker
drm/exynos: g2d: beautify probing message
drm/exynos: mixer: simplify loop in vp_win_reset()
drm/exynos: mixer: convert booleans to flags in mixer context
gpu: drm: exynos_hdmi: Remove duplicate initialization of regulator bulk consumer
gpu: drm: exynos_hdmi: Move PHY logic into single function
gpu: drm: exynos_hdmi: Move DDC logic into single function
drm/exynos: g2d: use autosuspend mode for PM runtime
The runqueue worker currently issues a get() when a new
node is processed, and a put() once a node is completed.
The corresponding suspend and resume calls currently only
do clock gating, but with the upcoming introduction of
IOMMU runpm also the corresponding IOMMU domain gets
enabled (for get()) and disabled (for put()). This
introduces performance regressions with we mitigate here.
Switch PM runtime to autosuspend, such that clock gating
and IOMMU control only happens when the engine is idle for
a 'long' time.
While the engine works on a runqueue node it does memory access to
the buffers associated with that node.
Make sure that the engine is idle when g2d_close() and/or
g2d_remove() are called, i.e. buffer associated with the process (for
g2d_close()), or all buffers (for g2d_remove()) can be safely be
unmapped.
We have to take into account that the engine might be in an undefined
state, i.e. it hangs and doesn't become idle. In this case, we issue
a hardware reset to return the hardware and the driver context into a
proper state.
drm/exynos: g2d: remove runqueue nodes in g2d_{close,remove}()
The driver might be closed (and/or removed) while there are still
nodes queued for processing.
Make sure to remove these nodes, which means all of them in
the case of g2d_remove() and only those belonging to the
corresponding process in g2d_close().
The change, i.e. merging the sleep and runpm operations, produces
a deadlock situation:
(1) exynos_g2d_exec_ioctl() prepares a runqueue node and
calls g2d_exec_runqueue()
(2) g2d_exec_runqueue() calls g2d_dma_start() which gets
runtime PM sync
(3) runtime PM core calls g2d_runtime_resume()
(4) g2d_runtime_resume() calls g2d_exec_runqueue(), which
loops back to (2)
Due to mutexes that are in place, a deadlock situation is created.
drm/exynos: mark exynos_dp_crtc_clock_enable() static
We get 1 warning when building kernel with W=1:
drivers/gpu/drm/exynos/exynos_dp.c:46:5: warning: no previous prototype for 'exynos_dp_crtc_clock_enable' [-Wmissing-prototypes]
In fact, this function is only used in the file in which it is
declared and don't need a declaration, but can be made static.
So this patch marks it 'static'.
Andrzej Hajda [Fri, 23 Sep 2016 10:43:29 +0000 (12:43 +0200)]
drm/exynos/fimd: add clock rate checking
In case of some platforms fimd clocks can be configured to
very low values, as a result refresh rate can be very low and
driver/drm-core will timeout waiting for vblanks, it will result
in premature removal of framebuffers and will cause oopses.
The patch adds atomic_check callback to fimd to prevent setting
such modes.
Andrzej Hajda [Mon, 26 Sep 2016 07:50:21 +0000 (16:50 +0900)]
drm/exynos: fix pending update handling
Exynos DRM devices update their registers at vblank time. Exynos-DRM uses
custom mechanism to wait for vblank. This mechanism is error prone -
variables are not updated atomically. As a result in certain circumstances
user space can try to free buffers which are still in use by hardware,
in such cases IOMMU can throw OOPS.
The patch instead of fixing the mechanism replaces it with drm core helper.
Andrzej Hajda [Fri, 23 Sep 2016 08:15:23 +0000 (10:15 +0200)]
drm/exynos/vidi: use timer for vblanks instead of sleeping worker
VIDI driver uses fake vblank handler to generate vblank events.
It was implemented using worker which slept for vblank time, additionally
it did not work if there were no page flips. The patch replaces it with
timer, uses drm_crtc_vblank_(on|off) helpers to manage it and fixes
behavior for non-page-flip cases.
This change allows further improvements of vblank in exynos-drm framework.
drm/exynos: mixer: convert booleans to flags in mixer context
The mixer context struct already has a 'flags' field, so
we can use it to store the 'interlace', 'vp_enabled' and
'has_sclk' booleans.
We use the non-atomic helper functions to access these bits.
Dave Airlie [Fri, 30 Sep 2016 03:18:26 +0000 (13:18 +1000)]
Merge branch 'drm-next-4.9' of git://people.freedesktop.org/~agd5f/linux into drm-next
Some additional fixes for 4.9:
- The rest of Christian's GTT rework which fixes a long standing bug
in the GPUVM code among other things
- Changes to the pci shutdown callbacks for certain hypervisors
- Fix hpd interrupt storms on eDP panels which have the hpd interrupt
enabled by the bios
- misc cleanups and bug fixes
* 'drm-next-4.9' of git://people.freedesktop.org/~agd5f/linux: (33 commits)
drm/radeon: always apply pci shutdown callbacks
drm/amdgpu: always apply pci shutdown callbacks (v2)
drm/amdgpu: improve VM PTE trace points
drm/amdgpu: fix GART_DEBUGFS define
drm/amdgpu: free userptrs even if GTT isn't bound
drm/amd/amdgpu: Various cleanups for DCEv6
drm/amdgpu: fix BO move offsets
drm/amdgpu: fix amdgpu_move_blit on 32bit systems
drm/amdgpu: fix gtt_mgr bo's offset
drm/amdgpu: fix initializing the VM BO shadow
drm/amdgpu: fix initializing the VM last eviction counter
drm/amdgpu: cleanup VM shadow BO unreferencing
drm/amdgpu: allocate GTT space for shadow VM page tables
drm/amdgpu: rename all rbo variable to abo v2
drm/amdgpu: remove unused member from struct amdgpu_bo
drm/amdgpu: add a custom GTT memory manager v2
drm/amdgpu/dce6: disable hpd on local panels
drm/amdgpu/dce8: disable hpd on local panels
drm/amdgpu/dce11: disable hpd on local panels
drm/amdgpu/dce10: disable hpd on local panels
...
Dave Airlie [Fri, 30 Sep 2016 02:56:31 +0000 (12:56 +1000)]
Merge tag 'drm/panel/for-4.9-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next
drm/panel: Changes for v4.9-rc1
Adds support for one more panel to the simple-panel driver, fixes up a
couple of delays and flags for existing panels and finally adds a new
driver for the DSI panel found on Nexus 7 devices.
* tag 'drm/panel/for-4.9-rc1' of git://anongit.freedesktop.org/tegra/linux:
drm/panel: Add JDI LT070ME05000 WUXGA DSI Panel
dt-bindings: Add JDI LT070ME05000 panel bindings
drm/panel: simple: Fix bus_format for the Olimex LCD-OLinuXino-4.3TS
drm/panel: simple-panel: Add delay timings for Starry KR122EA0SRA
drm/panel: simple: Fix bus flags for Ortustech com43h4m85ulc
drm/panel: simple: Add Innolux G101ICE-L01 panel
drm/panel: simple: Add delay timing for Sharp LQ123P1JX31
drm/dsi: Implement DCS set/get display brightness
drm/dsi: Order DCS helpers by command code
Christian König [Sun, 25 Sep 2016 14:11:52 +0000 (16:11 +0200)]
drm/amdgpu: improve VM PTE trace points
Use a separate one for the copy operation and
log all the interesting parameters.
Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Christian König [Sun, 25 Sep 2016 14:10:06 +0000 (16:10 +0200)]
drm/amdgpu: fix GART_DEBUGFS define
Obviously missed during the rename.
Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Christian König [Thu, 22 Sep 2016 12:19:50 +0000 (14:19 +0200)]
drm/amdgpu: free userptrs even if GTT isn't bound
This fixes a memory leak since binding GTT only on demand.
Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Tom St Denis [Thu, 22 Sep 2016 16:29:40 +0000 (12:29 -0400)]
drm/amd/amdgpu: Various cleanups for DCEv6
Signed-off-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Christian König [Wed, 21 Sep 2016 07:38:14 +0000 (09:38 +0200)]
drm/amdgpu: fix BO move offsets
It's pretty pointless to get the offset first and then initialize it.
Should fix issues with the new GTT manager.
Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Michel Dänzer <michel.daenzer@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Christian König [Wed, 17 Aug 2016 07:45:25 +0000 (09:45 +0200)]
drm/amdgpu: fix amdgpu_move_blit on 32bit systems
This bug seems to be present for a very long time.
Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
Flora Cui [Tue, 20 Sep 2016 09:07:31 +0000 (17:07 +0800)]
drm/amdgpu: fix gtt_mgr bo's offset
Signed-off-by: Flora Cui <Flora.Cui@amd.com> Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Christian König [Fri, 16 Sep 2016 12:07:46 +0000 (14:07 +0200)]
drm/amdgpu: fix initializing the VM BO shadow
We need to clear the shadows as well.
Signed-off-by: Christian König <christian.koenig@amd.com> Acked-by: Edward O'Callaghan <funfunctor@folklore1984.net> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Christian König [Fri, 16 Sep 2016 11:11:45 +0000 (13:11 +0200)]
drm/amdgpu: fix initializing the VM last eviction counter
Close a very small window where something can go wrong.
Signed-off-by: Christian König <christian.koenig@amd.com> Acked-by: Edward O'Callaghan <funfunctor@folklore1984.net> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Christian König [Fri, 16 Sep 2016 11:06:09 +0000 (13:06 +0200)]
drm/amdgpu: cleanup VM shadow BO unreferencing
Unreference the shadow BOs in the error path as well and drop the NULL checks.
Signed-off-by: Christian König <christian.koenig@amd.com> Acked-by: Edward O'Callaghan <funfunctor@folklore1984.net> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Christian König [Fri, 16 Sep 2016 09:46:23 +0000 (11:46 +0200)]
drm/amdgpu: allocate GTT space for shadow VM page tables
We need to access those with the system domain.
Fixes fallout from only allocating GTT space on demand.
Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Christian König [Thu, 15 Sep 2016 13:06:50 +0000 (15:06 +0200)]
drm/amdgpu: rename all rbo variable to abo v2
Just to cleanup some radeon leftovers.
sed -i "s/rbo/abo/g" drivers/gpu/drm/amd/amdgpu/*.c
sed -i "s/rbo/abo/g" drivers/gpu/drm/amd/amdgpu/*.h
v2: rebased
Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Christian König [Thu, 15 Sep 2016 12:10:48 +0000 (14:10 +0200)]
drm/amdgpu: remove unused member from struct amdgpu_bo
Not used in a while.
Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Christian König [Fri, 9 Sep 2016 14:32:33 +0000 (16:32 +0200)]
drm/amdgpu: add a custom GTT memory manager v2
Only allocate address space when we really need it.
v2: fix a typo, add correct function description,
stop leaking the node in the error case.
Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Dave Airlie [Wed, 28 Sep 2016 03:23:07 +0000 (13:23 +1000)]
Merge tag 'drm-qemu-20160921' of git://git.kraxel.org/linux into drm-next
bugfixes for qemu (bochs, qxl and virtio-gpu) drm drivers
* tag 'drm-qemu-20160921' of git://git.kraxel.org/linux:
drm/virtio: add real fence context and seqno
drm/virtio: drop virtio_gpu_execbuffer_ioctl() wrapping
virtio-gpu: avoid possible NULL pointer dereference
drm/qxl: reapply cursor after SetCrtc calls
bochs: ignore device if there isn't enougth memory
Dave Airlie [Wed, 28 Sep 2016 02:08:49 +0000 (12:08 +1000)]
Merge tag 'v4.8-rc8' into drm-next
Linux 4.8-rc8
There was a lot of fallout in the imx/amdgpu/i915 drivers, so backmerge
it now to avoid troubles.
* tag 'v4.8-rc8': (1442 commits)
Linux 4.8-rc8
fault_in_multipages_readable() throws set-but-unused error
mm: check VMA flags to avoid invalid PROT_NONE NUMA balancing
radix tree: fix sibling entry handling in radix_tree_descend()
radix tree test suite: Test radix_tree_replace_slot() for multiorder entries
fix memory leaks in tracing_buffers_splice_read()
tracing: Move mutex to protect against resetting of seq data
MIPS: Fix delay slot emulation count in debugfs
MIPS: SMP: Fix possibility of deadlock when bringing CPUs online
mm: delete unnecessary and unsafe init_tlb_ubc()
huge tmpfs: fix Committed_AS leak
shmem: fix tmpfs to handle the huge= option properly
blk-mq: skip unmapped queues in blk_mq_alloc_request_hctx
MIPS: Fix pre-r6 emulation FPU initialisation
arm64: kgdb: handle read-only text / modules
arm64: Call numa_store_cpu_info() earlier.
locking/hung_task: Fix typo in CONFIG_DETECT_HUNG_TASK help text
nvme-rdma: only clear queue flags after successful connect
i2c: qup: skip qup_i2c_suspend if the device is already runtime suspended
perf/core: Limit matching exclusive events to one PMU
...
Dave Airlie [Wed, 28 Sep 2016 01:27:05 +0000 (11:27 +1000)]
Merge branch 'drm-next-4.9' of git://people.freedesktop.org/~agd5f/linux into drm-next
Last set of radeon and amdgpu changes for 4.9. This is
mostly just the powerplay cleanup for dGPUs. Beyond that,
just misc code cleanups and bug fixes.
* 'drm-next-4.9' of git://people.freedesktop.org/~agd5f/linux: (49 commits)
drm/amd/amdgpu: Clean up afmt allocation in DCEv6. (v2)
drm/amd/amdgpu: Remove division from vblank_wait
drm/radeon/atif: Send a hotplug event when we get dgpu display request
drm/radeon/atpx: check for ATIF dGPU wake for display events support
drm/amdgpu/atif: Send a hotplug event when we get dgpu display request
drm/amdgpu/atpx: check for ATIF dGPU wake for display events support
drm/amdgpu: bump version for new vce packet support
drm/amdgpu/vce: allow the clock table packet
drm/amdgpu:cleanup virt related define
drm/amdgpu: use powerplay module for dgpu in Vi.
drm/amdgpu: set gfx clock gating for tonga/polaris.
drm/amdgpu: set system clock gating for tonga/polaris.
drm/amd/powerplay: export function to help to set cg by smu.
drm/amdgpu: avoid out of bounds access on array interrupt_status_offsets
drm/amdgpu: mark symbols static where possible
drm/amdgpu: remove unused functions
drm/amd/powerplay: Replace per-asic print_performance with generic
drm/radeon: narrow asic_init for virtualization
drm/amdgpu:add fw version entry to info
drm/amdgpu:determine if vPost is needed indeed
...
Dave Airlie [Wed, 28 Sep 2016 01:24:05 +0000 (11:24 +1000)]
Merge branch 'drm-etnaviv-next' of git://git.pengutronix.de/git/lst/linux into drm-next
Notable changes:
- Cleanups from Fabio to some error paths and proper error propagation.
- Lots of refactoring and new code to support the new MMU version 2,
still relatively unoptimized and doesn't yet provide better process
isolation than MMUv1, but enough to get newer cores up and running.
- New hardware support: GC3000, as found on the NXP i.MX6 QuadPlus SoC.
* 'drm-etnaviv-next' of git://git.pengutronix.de/git/lst/linux: (25 commits)
drm/etnaviv: mark whole context as lost in recover worker
drm/etnaviv: record correct cmdbuf IOVA in dump
drm/etnaviv: space out IOVA layout for cmdbufs on MMUv2
drm/etnaviv: fix up model and revision for GC2000+
drm/etnaviv: implement IOMMUv2 translation
drm/etnaviv: handle MMU exception in IRQ handler
drm/etnaviv: add flushing logic for MMUv2
drm/etnaviv: add function to construct MMUv2 init buffer
drm/etnaviv: map cmdbuf through MMU on version 2
drm/etnaviv: split out iova search and MMU reaping logic
drm/etnaviv: split out FE start
drm/etnaviv: split out wait for gpu idle
drm/etnaviv: move gpu_va() to etnaviv mmu
drm/etnaviv: remove unused iommu_v2 header
drm/etnaviv: move IOMMU domain allocation into etnaviv MMU
drm/etnaviv: indirect IOMMU restore through etnaviv MMU
drm/etnaviv: move linear window setup into etnaviv_iommuv1_restore
drm/etnaviv: rename etnaviv_iommu_domain_restore to etnaviv_iommuv1_restore
drm/etnaviv: only check if the cmdbuf is inside the linear window on MMUv1
drm/etnaviv: only try to use the linear window on MMUv1
...
Dave Airlie [Wed, 28 Sep 2016 01:23:15 +0000 (11:23 +1000)]
Merge tag 'sunxi-drm-fixes-for-4.9' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into drm-next
Allwinner sun4i DRM fixes for 4.9
A few fixes for the sun4i drm driver that range, including some fixes that
might prevent multiple planes from working depending on the sequence where
they are enabled.
* tag 'sunxi-drm-fixes-for-4.9' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux:
drm/sun4i: Fix the high buffer address mask
drm/sun4i: tv: Check mode pointer
drm/sun4i: Fix formats usable by the primary plane
drm/sun4i: dotclock: Round to closest clock rate
drm/sun4i: Fix sparse warnings
drm/sun4i: dotclock: Allow divider = 127
drm/sun4i: dotclock: Fix clock rate read back calcation
drm/sun4i: backend: remove redundant dev_err call in sun4i_backend_bind()
Dave Airlie [Wed, 28 Sep 2016 01:22:27 +0000 (11:22 +1000)]
Merge branch 'for-next' of ssh://people.freedesktop.org/~seanpaul/dogwood into drm-next
I've included some improvements to PSR from myself, as well as a great
series from Tomasz to clean up and tighten up vblank/flip handling.
The last patch is one from Tomeu that has been floating around for a
while, and since rockchip is one of the beneficiaries, I figured this
would be a good place to pick it up.
* 'for-next' of ssh://people.freedesktop.org/~seanpaul/dogwood:
drm/rockchip: Balance irq refcount on failure
drm/rockchip: Kill vop_plane_state
drm/rockchip: Always signal event in next vblank after cfg_done
drm/rockchip: Do not enable vblank without event
drm/rockchip: Replace custom wait_for_vblanks with helper
drm/rockchip: Unreference framebuffers from flip work
drm/rockchip: Avoid race with vblank count increment
drm/rockchip: Get rid of some unnecessary code
drm/rockchip: Clear interrupt status bits before enabling
drm/rockchip: Fix up bug in psr state machine
drm/bridge: analogix_dp: Remove duplicated code
drm/rockchip: Reduce psr flush time to 100ms
drm/rockchip: Don't key off vblank for psr
Dave Airlie [Wed, 28 Sep 2016 01:17:26 +0000 (11:17 +1000)]
Merge tag 'tilcdc-4.9-3.1' of https://github.com/jsarha/linux into drm-next
Second attempt for 3rd drm/tilcdc pull request for v4.9.
* tag 'tilcdc-4.9-3.1' of https://github.com/jsarha/linux:
drm/tilcdc: fix wrong error handling
drm/tilcdc: Return directly after a failed kfree_table_init() in tilcdc_convert_slave_node()
drm/tilcdc: Remove "default" from blue-and-red-wiring property binding
drm/tilcdc: Fix non static symbol warning
drm/tilcdc: mark symbols static where possible
drm/tilcdc: add missing header dependencies
drm/tilcdc: WARN if CRTC is touched without CRTC lock
drm/tilcdc: Take CRTC lock when calling tilcdc_crtc_disable()
drm/tilcdc: Remove unnecessary tilcdc_crtc_disable() from tilcdc_unload()
drm/tilcdc: Flush flip-work workqueue before drm_flip_work_cleanup()
drm/tilcdc: Clean up LCDC functional clock rate setting code
drm/tilcdc: Take crtc modeset lock while updating the crtc clock rate
Dave Airlie [Wed, 28 Sep 2016 01:14:58 +0000 (11:14 +1000)]
Merge branch 'sti-drm-next-2016-09-20' of https://github.com/vinceab/linux into drm-next
Here are some patches for drm-next.
It contains:
- minor fixes for typo and warning.
- sparse and coccicheck warning fixes
- bunch of patches fixing issues found while testing drm/sti with an
atomic version of weston
- the removal of the support of stih415-416 sti platform
* 'sti-drm-next-2016-09-20' of https://github.com/vinceab/linux:
drm/sti: remove stih415-416 platform support
drm/sti: fix compositor debugfs creation
drm/sti: use valid video mode
drm/sti: in crtc_atomic_flush, enable only planes of this crtc
drm/sti: use vtg array instead of vtg_main/aux
drm/sti: use different notifier_block for each pipe
drm/sti: fix atomic_disable check
drm/sti: run gdp init sequence only once
drm/sti: run hqvdp init sequence only once
drm/sti: fix debug logs
drm/sti: dpms function missing for HDMI connector
drm/sti: Fix sparse warnings
drm: sti: fix coccicheck warnings
drm: sti: Replace drm_fb_get_bpp_depth() with drm_format_plane_cpp()
Dave Airlie [Wed, 28 Sep 2016 01:09:59 +0000 (11:09 +1000)]
Merge branch 'msm-next' of git://people.freedesktop.org/~robclark/linux into drm-next
A bit smaller pull-req this time around. Some continued DT binding
cleanup to get the corresponding dts bits merged upstream (through
other trees). And explicit fence-fd support for submit ioctl.
* 'msm-next' of git://people.freedesktop.org/~robclark/linux:
drm/msm: bump kernel api version for explicit fencing
drm/msm: submit support for out-fences
drm/msm: move fence allocation out of msm_gpu_submit()
drm/msm: submit support for in-fences
drm/msm: extend the submit ioctl to pass in flags
drm/msm/mdp5: Set rotation property initial value to DRM_ROTATE_0 insted of 0
drm/msm/hdmi: don't print error when adding i2c adapter fails
drm/msm/mdp4: mark symbols static where possible
drm/msm: Remove call to reservation_object_test_signaled_rcu before wait
drm/msm/hdmi: Clean up HDMI gpio DT bindings
drm/msm/mdp4: Fix issue with LCDC/LVDS port parsing
Dave Airlie [Wed, 28 Sep 2016 00:28:23 +0000 (10:28 +1000)]
Merge tag 'topic/drm-misc-2016-09-25' of git://anongit.freedesktop.org/drm-intel into drm-next
- more core cleanup patches to prep drm_file to be used for
kernel-internal contexts (David Herrmann)
- more split-up+docs for drm_crtc.c
- lots of small fixes and polish all over
* tag 'topic/drm-misc-2016-09-25' of git://anongit.freedesktop.org/drm-intel: (37 commits)
drm: bridge: analogix/dp: mark symbols static where possible
drm/bochs: mark bochs_connector_get_modes() static
drm/bridge: analogix_dp: Improve panel on time
drm/bridge: analogix_dp: Don't read EDID if panel present
drm/bridge: analogix_dp: Remove duplicated code
Revert "drm/i2c: tda998x: don't register the connector"
drm: Fix plane type uabi breakage
dma-buf/sync_file: free fences array in num_fences is 1
drm/i2c: tda998x: don't register the connector
drm: Don't swallow error codes in drm_dev_alloc()
drm: Distinguish no name from ENOMEM in set_unique()
drm: Remove dirty property from docs
drm/doc: Document color space handling
drm: Extract drm_color_mgmt.[hc]
drm/doc: Polish plane composition property docs
drm: Conslidate blending properties in drm_blend.[hc]
drm/doc: Polish for drm_plane.[hc]
drm: Extract drm_plane.[hc]
drm/tilcdc: Add atomic and crtc headers to crtc.c
drm: Fix typo in encoder docs
...
Dave Airlie [Wed, 28 Sep 2016 00:25:42 +0000 (10:25 +1000)]
Merge tag 'drm-amdkfd-next-2016-09-19' of git://people.freedesktop.org/~gabbayo/linux into drm-next
This is amdkfd's pull request for kernel 4.9. It contains a fix to a possible
infinite loop bug and a couple of other minor "cleaning" patches.
* tag 'drm-amdkfd-next-2016-09-19' of git://people.freedesktop.org/~gabbayo/linux:
drm/amdkfd: Pass 'struct queue_propertices' by reference
drm/amdkfd: Unify multiple calls to pr_debug() into one
drm/amdkfd: Fix possible infinite loop
drm/amdkfd: Reuse function to find a process through pasid
drm/amdkfd: Add some missing memset zero'ing in queue init func
drm/amdkfd: Tidy up kfd_generate_gpu_id() uint64_t bitshift unpack
drm/amdgpu/vce3: don't forget to tear down some rings
We can use .num_rings for that.
Fixes: 6f0359ff7307 ("vce3: add support for third vce ring") Cc: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Grazvydas Ignotas <notasas@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Right now it's possible to trigger fence_drv.fences[] dereference after
the array has been freed. While the real problem is elsewhere, this still
results in confusing errors that depend on how the freed memory was
reused (I've seen "kernel tried to execute NX-protected page"), it's
better to clear them and get NULL dereference so that it's obvious what's
going wrong.
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Alex Deucher [Mon, 26 Sep 2016 20:44:54 +0000 (16:44 -0400)]
drm/amdgpu: add version bump for raster config programming
Reviewed-by: Christian König <christian.koenig@amd.com> Reviewed-by: Marek Olšák <marek.olsak@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Christian König [Sun, 25 Sep 2016 09:54:00 +0000 (11:54 +0200)]
drm/amdgpu: fix addr handling in amdgpu_vm_bo_update_mapping
Otherwise we will look at the wrong place in the IB when GART
mappings are split into smaller updates.
Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Acked-by: Tom StDenis <Tom.StDenis@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Merge tag 'trace-v4.8-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracefs fixes from Steven Rostedt:
"Al Viro has been looking at the tracefs code, and has pointed out some
issues. This contains one fix by me and one by Al. I'm sure that
he'll come up with more but for now I tested these patches and they
don't appear to have any negative impact on tracing"
* tag 'trace-v4.8-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
fix memory leaks in tracing_buffers_splice_read()
tracing: Move mutex to protect against resetting of seq data
When building XFS with -Werror, it now fails with:
include/linux/pagemap.h: In function 'fault_in_multipages_readable':
include/linux/pagemap.h:602:16: error: variable 'c' set but not used [-Werror=unused-but-set-variable]
volatile char c;
^
This is a regression caused by commit e23d4159b109 ("fix
fault_in_multipages_...() on architectures with no-op access_ok()").
Fix it by re-adding the "(void)c" trick taht was previously used to make
the compiler think the variable is used.
Signed-off-by: Dave Chinner <dchinner@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Lorenzo Stoakes [Sun, 11 Sep 2016 22:54:25 +0000 (23:54 +0100)]
mm: check VMA flags to avoid invalid PROT_NONE NUMA balancing
The NUMA balancing logic uses an arch-specific PROT_NONE page table flag
defined by pte_protnone() or pmd_protnone() to mark PTEs or huge page
PMDs respectively as requiring balancing upon a subsequent page fault.
User-defined PROT_NONE memory regions which also have this flag set will
not normally invoke the NUMA balancing code as do_page_fault() will send
a segfault to the process before handle_mm_fault() is even called.
However if access_remote_vm() is invoked to access a PROT_NONE region of
memory, handle_mm_fault() is called via faultin_page() and
__get_user_pages() without any access checks being performed, meaning
the NUMA balancing logic is incorrectly invoked on a non-NUMA memory
region.
A simple means of triggering this problem is to access PROT_NONE mmap'd
memory using /proc/self/mem which reliably results in the NUMA handling
functions being invoked when CONFIG_NUMA_BALANCING is set.
This issue was reported in bugzilla (issue 99101) which includes some
simple repro code.
There are BUG_ON() checks in do_numa_page() and do_huge_pmd_numa_page()
added at commit c0e7cad to avoid accidentally provoking strange
behaviour by attempting to apply NUMA balancing to pages that are in
fact PROT_NONE. The BUG_ON()'s are consistently triggered by the repro.
This patch moves the PROT_NONE check into mm/memory.c rather than
invoking BUG_ON() as faulting in these pages via faultin_page() is a
valid reason for reaching the NUMA check with the PROT_NONE page table
flag set and is therefore not always a bug.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=99101 Reported-by: Trevor Saunders <tbsaunde@tbsaunde.org> Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com> Acked-by: Rik van Riel <riel@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Mel Gorman <mgorman@techsingularity.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drm: bridge: analogix/dp: mark symbols static where possible
We get 2 warnings when building kernel with W=1:
drivers/gpu/drm/bridge/analogix/analogix_dp_core.c:1053:5: warning: no previous prototype for 'analogix_dp_get_modes' [-Wmissing-prototypes]
drivers/gpu/drm/bridge/analogix/analogix_dp_core.c:1097:1: warning: no previous prototype for 'analogix_dp_detect' [-Wmissing-prototypes]
In fact, both functions are only used in the file in which they are
declared and don't need a declaration, but can be made static.
So this patch marks both functions with 'static'.
drm/bochs: mark bochs_connector_get_modes() static
We get 1 warning when building kernel with W=1:
drivers/gpu/drm/bochs/bochs_kms.c:181:5: warning: no previous prototype for 'bochs_connector_get_modes' [-Wmissing-prototypes]
In fact, this function is only used in the file in which it is
declared and don't need a declaration, but can be made static.
So this patch marks it 'static'.
Merge tag 'powerpc-4.8-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull one more powerpc fix from Michael Ellerman:
"powernv/pci: Fix m64 checks for SR-IOV and window alignment from
Russell Currey"
* tag 'powerpc-4.8-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/powernv/pci: Fix m64 checks for SR-IOV and window alignment
radix tree: fix sibling entry handling in radix_tree_descend()
The fixes to the radix tree test suite show that the multi-order case is
broken. The basic reason is that the radix tree code uses tagged
pointers with the "internal" bit in the low bits, and calculating the
pointer indices was supposed to mask off those bits. But gcc will
notice that we then use the index to re-create the pointer, and will
avoid doing the arithmetic and use the tagged pointer directly.
This cleans the code up, using the existing is_sibling_entry() helper to
validate the sibling pointer range (instead of open-coding it), and
using entry_to_node() to mask off the low tag bit from the pointer. And
once you do that, you might as well just use the now cleaned-up pointer
directly.
[ Side note: the multi-order code isn't actually ever used in the kernel
right now, and the only reason I didn't just delete all that code is
that Kirill Shutemov piped up and said:
"Well, my ext4-with-huge-pages patchset[1] uses multi-order entries.
It also converts shmem-with-huge-pages and hugetlb to them.
I'm okay with converting it to other mechanism, but I need
something. (I looked into Konstantin's RFC patchset[2]. It looks
okay, but I don't feel myself qualified to review it as I don't
know much about radix-tree internals.)"
tracing: Move mutex to protect against resetting of seq data
The iter->seq can be reset outside the protection of the mutex. So can
reading of user data. Move the mutex up to the beginning of the function.
Fixes: d7350c3f45694 ("tracing/core: make the read callbacks reentrants") Cc: stable@vger.kernel.org # 2.6.30+ Reported-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Paul Burton [Thu, 22 Sep 2016 14:47:40 +0000 (15:47 +0100)]
MIPS: Fix delay slot emulation count in debugfs
Commit 432c6bacbd0c ("MIPS: Use per-mm page to execute branch delay slot
instructions") accidentally removed use of the MIPS_FPU_EMU_INC_STATS
macro from do_dsemulret, leading to the ds_emul file in debugfs always
returning zero even though we perform delay slot emulations.
Fix this by re-adding the use of the MIPS_FPU_EMU_INC_STATS macro.
Signed-off-by: Paul Burton <paul.burton@imgtec.com> Fixes: 432c6bacbd0c ("MIPS: Use per-mm page to execute branch delay slot instructions") Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14301/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Matt Redfearn [Thu, 22 Sep 2016 16:15:47 +0000 (17:15 +0100)]
MIPS: SMP: Fix possibility of deadlock when bringing CPUs online
This patch fixes the possibility of a deadlock when bringing up
secondary CPUs.
The deadlock occurs because the set_cpu_online() is called before
synchronise_count_slave(). This can cause a deadlock if the boot CPU,
having scheduled another thread, attempts to send an IPI to the
secondary CPU, which it sees has been marked online. The secondary is
blocked in synchronise_count_slave() waiting for the boot CPU to enter
synchronise_count_master(), but the boot cpu is blocked in
smp_call_function_many() waiting for the secondary to respond to it's
IPI request.
Fix this by marking the CPU online in cpu_callin_map and synchronising
counters before declaring the CPU online and calculating the maps for
IPIs.
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
"Three fixlets for perf:
- add a missing NULL pointer check in the intel BTS driver
- make BTS an exclusive PMU because BTS can only handle one event at
a time
- ensure that exclusive events are limited to one PMU so that several
exclusive events can be scheduled on different PMU instances"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/core: Limit matching exclusive events to one PMU
perf/x86/intel/bts: Make it an exclusive PMU
perf/x86/intel/bts: Make sure debug store is valid
Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixes from Thomas Gleixner:
"Two smallish fixes:
- use the proper asm constraint in the Super-H atomic_fetch_ops
- a trivial typo fix in the Kconfig help text"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/hung_task: Fix typo in CONFIG_DETECT_HUNG_TASK help text
locking/atomic, arch/sh: Fix ATOMIC_FETCH_OP()
Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI fixes from Thomas Gleixner:
"Two fixes for EFI/PAT:
- a 32bit overflow bug in the PAT code which was unearthed by the
large EFI mappings
- prevent a boot hang on large systems when EFI mixed mode is enabled
but not used"
* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/efi: Only map RAM into EFI page tables if in mixed-mode
x86/mm/pat: Prevent hang during boot when mapping pages
Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
"Three fixes for irq core and irq chip drivers:
- Do not set the irq type if type is NONE. Fixes a boot regression
on various SoCs
- Use the proper cpu for setting up the GIC target list. Discovered
by the cpumask debugging code.
- A rather large fix for the MIPS-GIC so per cpu local interrupts
work again. This was discovered late because the code falls back
to slower timers which use normal device interrupts"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/mips-gic: Fix local interrupts
irqchip/gicv3: Silence noisy DEBUG_PER_CPU_MAPS warning
genirq: Skip chained interrupt trigger setup if type is IRQ_TYPE_NONE
Merge branch 'hughd-fixes' (patches from Hugh Dickins)
Merge VM fixes from High Dickins:
"I get the impression that Andrew is away or busy at the moment, so I'm
going to send you three independent uncontroversial little mm fixes
directly - though none is strictly a 4.8 regression fix.
- shmem: fix tmpfs to handle the huge= option properly from Toshi
Kani is a one-liner to fix a major embarrassment in 4.8's hugepages
on tmpfs feature: although Hillf pointed it out in June, somehow
both Kirill and I repeatedly dropped the ball on this one. You
might wonder if the feature got tested at all with that bug in:
yes, it did, but for wider testing coverage, Kirill and I had each
relied too much on an override which bypasses that condition.
- huge tmpfs: fix Committed_AS leak just a run-of-the-mill accounting
fix in the same feature.
- mm: delete unnecessary and unsafe init_tlb_ubc() is an unrelated
fix to 4.3's TLB flush batching in reclaim: the bug would be rare,
and none of us will be shamed if this one misses 4.8; but it got
such a quick ack from Mel today that I'm inclined to offer it along
with the first two"
* emailed patches from Hugh Dickins <hughd@google.com>:
mm: delete unnecessary and unsafe init_tlb_ubc()
huge tmpfs: fix Committed_AS leak
shmem: fix tmpfs to handle the huge= option properly
init_tlb_ubc() looked unnecessary to me: tlb_ubc is statically
initialized with zeroes in the init_task, and copied from parent to
child while it is quiescent in arch_dup_task_struct(); so I went to
delete it.
But inserted temporary debug WARN_ONs in place of init_tlb_ubc() to
check that it was always empty at that point, and found them firing:
because memcg reclaim can recurse into global reclaim (when allocating
biosets for swapout in my case), and arrive back at the init_tlb_ubc()
in shrink_node_memcg().
Resetting tlb_ubc.flush_required at that point is wrong: if the upper
level needs a deferred TLB flush, but the lower level turns out not to,
we miss a TLB flush. But fortunately, that's the only part of the
protocol that does not nest: with the initialization removed, cpumask
collects bits from upper and lower levels, and flushes TLB when needed.
Fixes: 72b252aed506 ("mm: send one IPI per CPU to TLB flush all entries after unmapping pages") Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: Mel Gorman <mgorman@techsingularity.net> Cc: stable@vger.kernel.org # 4.3+ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Under swapping load on huge tmpfs, /proc/meminfo's Committed_AS grows
bigger and bigger: just a cosmetic issue for most users, but disabling
for those who run without overcommit (/proc/sys/vm/overcommit_memory 2).
shmem_uncharge() was forgetting to unaccount __vm_enough_memory's
charge, and shmem_charge() was forgetting it on the filesystem-full
error path.
Sean Paul [Wed, 7 Sep 2016 11:23:15 +0000 (07:23 -0400)]
drm/bridge: analogix_dp: Improve panel on time
In order to reduce the time required to turn on the panel, this patch
makes 2 assumptions:
1- In detect(): if there's a panel, we're connected.
2- In get_modes(): if there's a panel, let the panel driver decide if
it should prepare/unprepare in order to get the modes.
The first is straightforward, and shouldn't need further explanation. The
second should eliminate the prepare/unprepare delays from get_modes() in
most cases, since panels generally hardcode their modes in the driver as
opposed to reading EDID. If a panel does need to read EDID, it should be
responsible for ensuring it's in a state in which it can.
Sean Paul [Wed, 24 Aug 2016 14:58:26 +0000 (10:58 -0400)]
drm/bridge: analogix_dp: Don't read EDID if panel present
If there's a panel connected to the analogix_dp bridge, rely on
the panel driver for modes, rather than reading EDID *and* calling
get_modes() on the panel.
This allows panels with a valid EDID to read it in the panel driver
(e.g. simple_panel), and panels with invalid EDID to homebrew modes
in their get_modes implementation.
Tomeu Vizoso [Wed, 24 Aug 2016 14:54:41 +0000 (10:54 -0400)]
drm/bridge: analogix_dp: Remove duplicated code
Remove code for reading the EDID and DPCD fields and use the helpers
instead.
Besides the obvious code reduction, other helpers are being added to the
core that could be used in this driver and will be good to be able to
use them instead of duplicating them.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> Tested-by: Javier Martinez Canillas <javier@osg.samsung.com> Tested-by: Sean Paul <seanpaul@chromium.org> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Sean Paul <seanpaul@chromium.org> Cc: Javier Martinez Canillas <javier@osg.samsung.com> Cc: Mika Kahola <mika.kahola@intel.com> Cc: Yakir Yang <ykk@rock-chips.com> Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Archit Taneja <architt@codeaurora.org>
Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
"Three driver bugfixes: fixing uninitialized memory pointers (eg20t),
pm/clock imbalance (qup), and a wrongly set cached variable (pc954x)"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: qup: skip qup_i2c_suspend if the device is already runtime suspended
i2c: mux: pca954x: retry updating the mux selection on failure
i2c-eg20t: fix race between i2c init and interrupt enable
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"Three fixes, two regressions and one that poses a problem in blk-mq
with the new nvmef code"
* 'for-linus' of git://git.kernel.dk/linux-block:
blk-mq: skip unmapped queues in blk_mq_alloc_request_hctx
nvme-rdma: only clear queue flags after successful connect
blk-throttle: Extend slice if throttle group is not empty
Merge branch 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
"Josef fixed a problem when quotas are enabled with his latest ENOSPC
rework, and Jeff added more checks into the subvol ioctls to avoid
tripping up lookup_one_len"
* 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
btrfs: ensure that file descriptor used with subvol ioctls is a dir
Btrfs: handle quota reserve failure properly
Merge tag 'regmap-fix-v4.8-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap
Pull regmap fix from Mark Brown:
"A fix for an issue with double locking that was introduced earlier
this release. I'd missed in review that we were already in a locked
region when trying to drop part of the cache"
* tag 'regmap-fix-v4.8-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
regmap: fix deadlock on _regmap_raw_write() error path
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
"This fixes a regression in RSA that was only half-fixed earlier in the
cycle. It also fixes an older regression that breaks the keyring
subsystem"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: rsa-pkcs1pad - Handle leading zero for decryption
KEYS: Fix skcipher IV clobbering
Merge tag 'tags/nand-fixes-for-4.8-rc8' of git://git.infradead.org/linux-ubifs
Pull MTD fixes from Richard Weinberger:
"NAND Fixes for 4.8-rc8.
This contains fixes for bugs which got introduced in -rc1. Usually
Brian takes NAND patches from Boris, but since Brian is very busy
these days with other stuff and Boris is not yet member of the
kernel.org web of trust I stepped in.
Boris will be in Berlin at ELCE, I'll sign his key and hopefully other
Kernel developers too such that he can issue his own pull requests
soon.
Summary:
- Fix a wrong OOB layout definition in the mxc driver
- Fix incorrect ECC handling in the mtk driver"
* tag 'tags/nand-fixes-for-4.8-rc8' of git://git.infradead.org/linux-ubifs:
mtd: nand: mxc: fix obiwan error in mxc_nand_v[12]_ooblayout_free() functions
mtd: nand: fix chances to create incomplete ECC data when writing
mtd: nand: fix generating over-boundary ECC data when writing
Paul Burton [Fri, 23 Sep 2016 14:13:53 +0000 (15:13 +0100)]
MIPS: Fix pre-r6 emulation FPU initialisation
In the mipsr2_decoder() function, used to emulate pre-MIPSr6
instructions that were removed in MIPSr6, the init_fpu() function is
called if a removed pre-MIPSr6 floating point instruction is the first
floating point instruction used by the task. However, init_fpu()
performs varous actions that rely upon not being migrated. For example
in the most basic case it sets the coprocessor 0 Status.CU1 bit to
enable the FPU & then loads FP register context into the FPU registers.
If the task were to migrate during this time, it may end up attempting
to load FP register context on a different CPU where it hasn't set the
CU1 bit, leading to errors such as:
projects / kernel.git / log