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691,473 commits

Author SHA1 Message Date
Andreas Klinger
9573e79230 pinctrl: fix pincontrol definition for marvell
On Marvell mv88f6180 with pin control driver one can not use multi
purpose pins 35 through 44.
I'm using this controller on an embedded board and i found that the
pin multiplexing is not the same as in the hardware spezification.
This patch alters the pin description so that mpp pins 0 to 19 as well
as 35 to 44 are usable.

Pin settings i used can be found here:
http://www.marvell.com/embedded-processors/kirkwood/assets/HW_88F6180_OpenSource.pdf

Signed-off-by: Andreas Klinger <ak@it-klinger.de>
Reviewed-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-07-24 16:23:50 +02:00
James Hogan
2f8f8c04e8 MIPS: tlbex: Avoid duplicated single_insn_swpd
The expression "uasm_in_compat_space_p(swpd) && !uasm_rel_lo(swpd)" is
used twice in build_get_pgd_vmalloc64(), one of which is assigned to the
local variable single_insn_swpd. Update the other use to just use
single_insn_swpd instead to remove the duplication.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: David Daney <ddaney@caviumnetworks.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13779/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 13:16:00 +02:00
James Hogan
f7d9afea6c MIPS: uasm: Handle low values in uasm_in_compat_space_p()
uasm_in_compat_space_p() determines whether the given value is in the
32-bit compatibility part of the 64-bit address space, i.e. is in 32-bit
sign-extended form, however it only handles the top half of the value
space (corresponding to the kernel compatibility segments in the upper
half of the address space). Since values < 2^31 (corresponding to the
low 2GiB of the address space) can also be handled using 32-bit
instructions (e.g. a LUI and ADDIU) rather than convoluted 64-bit
immediate generation, rewrite it with a cast to check whether the
address matches its 32-bit sign extended form.

This allows UASM_i_LA to be used to generate arbitrary 32-bit immediates
more efficiently on 64-bit CPUs, i.e. more like the li (load immediate)
pseudo-instruction.

For example this code to load the immediate (ST0_EXL | KSU_USER |
ST0_BEV | ST0_KX) into k0 with UASM_i_LA():

 lui        k0,0x0
 dsll       k0,k0,0x10
 daddiu     k0,k0,64
 dsll       k0,k0,0x10
 daddiu     k0,k0,146

Changes to this more efficient version:

 lui        k0,0x40
 addiu      k0,k0,146

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13778/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 13:15:28 +02:00
Sergey Ryazanov
af1d8666c5 MIPS: Add default configuration for ath25
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Cc: Linux MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/13700/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:45:59 +02:00
James Hogan
e9cbf6299e MIPS: Fix MSA asm warnings in control reg accessors
Building an MSA capable kernel with a toolchain that supports MSA
produces warnings such as this:

  CC      arch/mips/kernel/cpu-probe.o
{standard input}: Assembler messages:
{standard input}:4786: Warning: the `msa' extension requires 64-bit FPRs

This is due to ".set msa" without ".set fp=64" in the inline assembly of
control register accessors, since MSA requires the 64-bit FPU registers
(FR=1). Add the missing fp=64 in these functions to silence the
warnings.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13554/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:45:00 +02:00
James Hartley
11a1cf34ea MAINTAINERS: Add pistachio SoC Support
The Pistachio SoC from Imagination Technologies currently has no
entry in the MAINTAINERS file, so add one.

Signed-off-by: James Hartley <james.hartley@imgtec.com>
Reviewed-by: Ionela Voinescu <ionela.voinescu@imgtec.com>
Cc: davem@davemloft.net
Cc: geert@linux-m68k.org
Cc: gregkh@linuxfoundation.org
Cc: akpm@linux-foundation.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: ionela.voinescu@imgtec.com
Patchwork: https://patchwork.linux-mips.org/patch/13755/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:43:22 +02:00
Zubair Lutfullah Kakakhel
645c7827e6 MIPS: Pistachio: Remove plat_setup_iocoherency
The Pistachio SoC does not have an IOCU.  Hence, DMA is non-coherent.

Remove the function checking for iocoherency and select
CONFIG_DMA_NONCOHERENT in Kconfig

This code is probably accidentally inherited from Malta.

Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Reviewed-by: James Hartley <james.hartley@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13433/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:41:22 +02:00
Hauke Mehrtens
7bf0d5e8e6 MIPS: Lantiq: Register IRQ handler for virtual IRQ number
We used the hardware IRQ number to register the IRQ handler and not the
virtual one. This probably caused some problems because the hardware
IRQ numbers are only unique for each IRQ controller and not in the
system. The virtual IRQ number is managed by Linux and unique in the
system. This was probably the reason there was a gab of 8 IRQ numbers added
before the numbers used for the lantiq IRQ controller. With the current
setup the hardware and the virtual IRQ numbers are the same.

Reported-by: Thomas Langer <thomas.langer@intel.com>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: John Crispin <john@phrozen.org>
Cc: thomas.langer@intel.com
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13539/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:39:59 +02:00
Linus Walleij
666dc36764 MIPS: Delete use of ARCH_WANT_OPTIONAL_GPIOLIB
The Loongson1 added a new instance of ARCH_WANT_OPTIONAL_GPIOLIB
which is no longer required to have GPIOLIB available in
Kconfig. Delete it.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13543/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:38:18 +02:00
John Crispin
f97e5e8ef8 MIPS: Lantiq: Use the real EXIN count
We runtime load the available external interrupts into an array and store
the number inside exin_avail. Some of the code however uses MAX_EIU for
looping over the array which may partially be 0. This is a cosmetic fix as
the existing code works as is. It is just nicer to only loop over the array
elements that were actually populated during probe.

Signed-off-by: John Crispin <john@phrozen.org>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/13602/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:31:58 +02:00
John Crispin
fe46e5032e MIPS: Lantiq: Fix eiu interrupt loading code
Using of_irq_count to load the irq index from the devicetree is incorrect.
This will cause the kernel to map them regardless, even if they dont
actually get used. Change the code to use of_property_count_u32_elems()
instead which is the correct API to use in this case.

Signed-off-by: John Crispin <john@phrozen.org>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/13601/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:31:44 +02:00
John Crispin
f0bbe4dc5c MIPS: Lantiq: Fix eiu interrupt loading code
Using of_irq_count to load the irq index from the devicetree is incorrect.
This will cause the kernel to map them regardless, even if they dont
actually get used. Change the code to use of_property_count_u32_elems()
instead which is the correct API to use in this case.

Signed-off-by: John Crispin <john@phrozen.org>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/13601/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:30:28 +02:00
Matt Redfearn
7840d6188b MIPS: Move CPU Hotplug config option into submenu
The KConfig option HOTPLUG_CPU should appear in the "Kernel Type"
submenu. Relocate it to where SMP support is configured.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13751/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:22:20 +02:00
Matt Redfearn
0d2808f338 MIPS: smp-cps: Add support for CPU hotplug of MIPSr6 processors
Introduce support for hotplug of Virtual Processors in MIPSr6 systems.
The method is simpler than the VPE parallel from the now-deprecated MT
ASE, it can now simply write the VP_STOP register with the mask of VPs
to halt, and use the VP_RUNNING register to determine when the VP has
halted.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Reviewed-by: Paul Burton <paul.burton@imgtec.com>
Cc: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Qais Yousef <qais.yousef@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13752/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:19:57 +02:00
Matt Redfearn
9736c6152e MIPS: smp-cps: Allow booting of CPU other than VP0 within a core
The boot_core function was hardcoded to always start VP0 when starting
a core via the CPC. When hotplugging a CPU this may not be the desired
behaviour.

Make boot_core receive the VP ID to start running on the core, such that
alternate VPs can be started via CPU hotplug.
Also ensure that all other VPs within the core are stopped before
bringing the core out of reset so that only the desired VP starts.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Reviewed-by: Paul Burton <paul.burton@imgtec.com>
Cc: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Qais Yousef <qais.yousef@imgtec.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13750/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:19:12 +02:00
Huacai Chen
3ef0665398 MIPS: hpet: Increase HPET_MIN_PROG_DELTA and decrease HPET_MIN_CYCLES
At first, we prefer to use mips clockevent device, so we decrease the
rating of hpet clockevent device.

For hpet, if HPET_MIN_PROG_DELTA (minimum delta of hpet programming) is
too small and HPET_MIN_CYCLES (threshold of -ETIME checking) is too
large, then hpet_next_event() can easily return -ETIME. After commit
c6eb3f70d4 ("hrtimer: Get rid of hrtimer softirq") this will cause
a RCU stall.

So, HPET_MIN_PROG_DELTA must be sufficient that we don't re-trip the
-ETIME check -- if we do, we will return -ETIME, forward the next event
time, try to set it, return -ETIME again, and basically lock the system
up. Meanwhile, HPET_MIN_CYCLES doesn't need to be too large, 16 cycles
is enough.

This solution is similar to commit f9eccf2461 ("clocksource/drivers
/vt8500: Increase the minimum delta").

By the way, this patch ensures hpet count/compare to be 32-bit long.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J . Hill <Steven.Hill@imgtec.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13819/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:01:00 +02:00
Huacai Chen
07d69579e7 MIPS: Don't register r4k sched clock when CPUFREQ enabled
Don't register r4k sched clock when CPUFREQ enabled because sched clock
need a constant frequency.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J . Hill <Steven.Hill@caviumnetworks.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13820/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:00:15 +02:00
Huacai Chen
6dabf2b7a5 MIPS: Fix r4k clockevents registration
CPUFreq need min_delta_ticks/max_delta_ticks to be initialized, and
this can be done by clockevents_config_and_register().

Cc: stable@vger.kernel.org
Signed-off-by: Heiher <r@hev.cc>
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J . Hill <Steven.Hill@imgtec.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: stable@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13817/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 11:59:48 +02:00
Chris Wilson
f527a38ee7 drm/i915: Update the breadcrumb interrupt counter before enabling
In order to close a race with a long running hangcheck comparing a stale
interrupt counter with a just started waiter, we need to first bump the
counter as we start the fresh wait.

References: https://bugs.freedesktop.org/show_bug.cgi?id=96974
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1469351421-13493-2-git-send-email-chris@chris-wilson.co.uk
2016-07-24 10:57:20 +01:00
Chris Wilson
2529d57050 drm/i915: Drop racy markup of missed-irqs from idle-worker
During the idle-worker we disable the hangcheck and so kick any waiters
that should have been completed (since the GPU is now idle). Unlike the
hangcheck, we do not take any care to avoid the race between the irq
handler and ourselves, and so it is possible for us to declare a missed
interrupt even as the bottom-half is being scheduled to run. Let's
ignore this race to stop a potential false-positive error.

References: https://bugs.freedesktop.org/show_bug.cgi?id=96974
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1469351421-13493-1-git-send-email-chris@chris-wilson.co.uk
2016-07-24 10:57:19 +01:00
Marc Zyngier
3f312db6b6 KVM: arm: vgic-irqfd: Workaround changing kvm_set_routing_entry prototype
kvm_set_routing_entry is changing in -next, and causes things to
explode. Add a temporary workaround that should be dropped when
we hit 4.8-rc1

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-07-24 10:37:38 +01:00
Colin Ian King
291e3e51a3 target: fix spelling mistake: "limitiation" -> "limitation"
trivial fix to spelling mistake

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-07-23 23:34:55 -07:00
Sumit Rai
c1ccbfe031 target: Fix residual overflow handling in target_complete_cmd_with_length
This patch fixes residual overflow handling to correctly set the
residual_count using SPDTL, instead of SCSI Allocation Length.

Allocation Length is the maximum value of the SPDTL and not substitute
for it, hence it shouldn’t be used to calculate ResidualCount except for
cases where SPDTL > Allocation Length and Data is truncated (in that
case both Alloc Len and SPDTL are same). (SPC 5r01 Section 4.2.5.6).

Thanks to Ajay Nair in assisting with this patch.

Signed-off-by: Sumit Rai <sumitrai96@gmail.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-07-23 23:34:54 -07:00
Wei Yongjun
89b90c09b5 dmaengine: k3dma: add missing clk_disable_unprepare() on error in k3_dma_probe()
Add the missing clk_disable_unprepare() before return
from k3_dma_probe() in the error handling case.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-24 11:59:15 +05:30
Arnd Bergmann
e94570a36b dmaengine: zynqmp_dma: add missing MODULE_LICENSE
We get a warning about the missing MODULE_LICENSE tag for this newly
added driver module:

WARNING: modpost: missing MODULE_LICENSE() in drivers/dma/xilinx/zynqmp_dma.o
see include/linux/module.h for more information

This adds a "GPL" license, matching the "version 2 or later" information in
the comment at the start of the file.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-24 11:55:17 +05:30
Wei Yongjun
d8cc38dd96 dmaengine: qcom_hidma: use for_each_matching_node() macro
Use for_each_matching_node() macro instead of open coding it.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-24 11:46:05 +05:30
Kedareswara rao Appana
caf5ee94be dmaengine: zynqmp_dma: Fix static checker warning
This patch fixes the below static checker warning
drivers/dma/xilinx/zynqmp_dma.c:973 zynqmp_dma_chan_probe()
        warn: was && intended here instead of ||?

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-24 11:19:22 +05:30
Peter Ujfalusi
ad52465b6c dmaengine: omap-dma: Support for interleaved transfer
Initial support for interleaved transfer with sDMA.
The implementation only supports DMA_MEM_TO_MEM and frame_size must be 1.
sDMA needs to be configured for double indexing when ICG is needed.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-07-24 11:13:53 +05:30
David S. Miller
de0ba9a0d8 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Just several instances of overlapping changes.

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-07-24 00:53:32 -04:00
Vishal Verma
37b137ff8c nfit, libnvdimm: allow an ARS scrub to be triggered on demand
Normally, an ARS (Address Range Scrub) only happens at
boot/initialization time. There can however arise situations where a
bus-wide rescan is needed - notably, in the case of discovering a latent
media error, we should do a full rescan to figure out what other sectors
are bad, and thus potentially avoid triggering an mce on them in the
future. Also provide a sysfs trigger to start a bus-wide scrub.

Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-07-23 21:51:42 -07:00
Max Filippov
4e7c84ec04 xtensa: support reserved-memory DT node
This allows reserving regions of physical memory from the device tree.
See Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
for more details.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2016-07-24 06:34:00 +03:00
Max Filippov
0e46c1115f xtensa: drop sysmem and switch to memblock
Memblock is the standard kernel boot-time memory tracker/allocator. Use
it instead of the custom sysmem allocator. This allows using kmemleak,
CMA and device tree memory reservation.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2016-07-24 06:34:00 +03:00
Max Filippov
3de00482b0 xtensa: minimize use of PLATFORM_DEFAULT_MEM_{ADDR,SIZE}
Now that the kernel load address and KSEG physical base address have
their own Kconfig symbols PLATFORM_DEFAULT_MEM seems redundant. It makes
little sense to use it in MMU configurations instead of KSEG_PADDR.
In noMMU configurations there's no explicit KSEG, so it's still useful
for the early cache initialization and definition of ARCH_PFN_OFFSET,
which affects mem_map size.

- limit it to noMMU; MMU variants have XCHAL_KSEG_PADDR and
  XCHAL_KSEG_SIZE;
- don't use it to define TASK_SIZE or MAX_LOW_PFN: first doesn't make
  any difference in noMMU, second is meaningless as there's no high
  memory;
- don't add default physical memory region: memory layout should come
  from the DT, bootloader tags, or memmap= command line parameter.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2016-07-24 06:33:59 +03:00
Max Filippov
a9f2fc628e xtensa: cleanup MMU setup and kernel layout macros
Make kernel load address explicit, independent of the selected MMU
configuration and configurable from Kconfig. Do not restrict it to the
first 512MB of the physical address space.

Cleanup kernel memory layout macros:

- rename VECBASE_RESET_VADDR to VECBASE_VADDR, XC_VADDR to VECTOR_VADDR;
- drop VIRTUAL_MEMORY_ADDRESS and LOAD_MEMORY_ADDRESS;
- introduce PHYS_OFFSET and use it in __va and __pa definitions;
- synchronize MMU/noMMU vectors, drop unused NMI vector;
- replace hardcoded vectors offset of 0x3000 with Kconfig symbol.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2016-07-24 06:33:58 +03:00
Max Filippov
d39af90265 xtensa: add alternative kernel memory layouts
MMUv3 is able to support low memory bigger than 128MB.
Implement 256MB and 512MB KSEG layouts:

- add Kconfig selector for KSEG layout;
- add KSEG base address, size and alignment definitions to
  arch/xtensa/include/asm/kmem_layout.h;
- use new definitions in TLB initialization;
- add build time memory map consistency checks.

See Documentation/xtensa/mmu.txt for the details of new memory layouts.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2016-07-24 06:33:58 +03:00
Max Filippov
f1883aa7d6 xtensa: move kernel mapping addresses into kmem_layout.h
Create a header dedicated to memory layout definitions. Include it from
places where these definitions are needed.
Express vmalloc area address, VIRTUAL_MEMORY_ADDRESS and KERNELOFFSET
through KSEG address.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2016-07-24 06:33:57 +03:00
Max Filippov
12c8007daf xtensa: fix __ffs result type
Make __ffs result type unsigned long to match generic asm
implementation. This fixes the following build warning:

  mm/nobootmem.c: In function '__free_pages_memory':
  include/linux/kernel.h:742:17: warning: comparison of distinct pointer
                                          types lacks a cast
    (void) (&_min1 == &_min2);  \
  		 ^
  mm/nobootmem.c💯11: note: in expansion of macro 'min'
     order = min(MAX_ORDER - 1UL, __ffs(start));

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2016-07-24 06:33:29 +03:00
Linus Torvalds
68093c43f3 A fix for a long-standing bug in the incremental osdmap handling code
that caused misdirected requests, tagged for stable.
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Merge tag 'ceph-for-4.7-rc8' of git://github.com/ceph/ceph-client

Pull ceph fix from Ilya Dryomov:
 "A fix for a long-standing bug in the incremental osdmap handling code
  that caused misdirected requests, tagged for stable"

  The tag is signed with a brand new key - Sage is on vacation and I
  didn't anticipate this"

* tag 'ceph-for-4.7-rc8' of git://github.com/ceph/ceph-client:
  libceph: apply new_state before new_up_client on incrementals
2016-07-24 10:00:31 +09:00
Wolfram Sang
b4cdaf32ce Documentation: i2c: slave: give proper example for pm usage
pm_runtime_forbid was the wrong knob, this is the better one.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-07-23 22:04:20 +02:00
Wolfram Sang
38fa8afff0 Documentation: i2c: slave: describe buffer problems a bit better
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-07-23 22:00:58 +02:00
Eric W. Biederman
aeaa4a79ff fs: Call d_automount with the filesystems creds
Seth Forshee reported a mount regression in nfs autmounts
with "fs: Add user namespace member to struct super_block".

It turns out that the assumption that current->cred is something
reasonable during mount while necessary to improve support of
unprivileged mounts is wrong in the automount path.

To fix the existing filesystems override current->cred with the
init_cred before calling d_automount and restore current->cred after
d_automount completes.

To support unprivileged mounts would require a more nuanced cred
selection, so fail on unprivileged mounts for the time being.  As none
of the filesystems that currently set FS_USERNS_MOUNT implement
d_automount this check is only good for preventing future problems.

Fixes: 6e4eab577a ("fs: Add user namespace member to struct super_block")
Tested-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2016-07-23 14:51:26 -05:00
Andy Lutomirski
55920d31f1 x86/mm/cpa: Add missing comment in populate_pdg()
In commit:

  21cbc2822aa1 ("x86/mm/cpa: Unbreak populate_pgd(): stop trying to deallocate failed PUDs")

I intended to add this comment, but I failed at using git.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/242baf8612394f4e31216f96d13c4d2e9b90d1b7.1469293159.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-23 21:17:10 +02:00
Andy Lutomirski
530dd8d4b9 x86/mm/cpa: Fix populate_pgd(): Stop trying to deallocate failed PUDs
Valdis Kletnieks bisected a boot failure back to this recent commit:

  360cb4d155 ("x86/mm/cpa: In populate_pgd(), don't set the PGD entry until it's populated")

I broke the case where a PUD table got allocated -- populate_pud()
would wander off a pgd_none entry and get lost.  I'm not sure how
this survived my testing.

Fix the original issue in a much simpler way.  The problem
was that, if we allocated a PUD table, failed to populate it, and
freed it, another CPU could potentially keep using the PGD entry we
installed (either by copying it via vmalloc_fault or by speculatively
caching it).  There's a straightforward fix: simply leave the
top-level entry in place if this happens.  This can't waste any
significant amount of memory -- there are at most 256 entries like
this systemwide and, as a practical matter, if we hit this failure
path repeatedly, we're likely to reuse the same page anyway.

For context, this is a reversion with this hunk added in:

	if (ret < 0) {
+		/*
+		 * Leave the PUD page in place in case some other CPU or thread
+		 * already found it, but remove any useless entries we just
+		 * added to it.
+		 */
-		unmap_pgd_range(cpa->pgd, addr,
+		unmap_pud_range(pgd_entry, addr,
			        addr + (cpa->numpages << PAGE_SHIFT));
		return ret;
	}

This effectively open-codes what the now-deleted unmap_pgd_range()
function used to do except that unmap_pgd_range() used to try to
free the page as well.

Reported-by: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Mike Krinkin <krinkin.m.u@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Toshi Kani <toshi.kani@hp.com>
Link: http://lkml.kernel.org/r/21cbc2822aa18aa812c0215f4231dbf5f65afa7f.1469249789.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-23 21:13:25 +02:00
Dan Williams
18515942d6 libnvdimm: register nvdimm_bus devices with an nd_bus driver
A recent effort to add a new nvdimm bus provider attribute highlighted a
race between interrogating nvdimm_bus->nd_desc and nvdimm_bus tear down.
The typical way to handle these races is to take the device_lock() in
the attribute method and validate that the device is still active.  In
order for a device to be 'active' it needs to be associated with a
driver.  So, we create the small boilerplate for a driver and register
nvdimm_bus devices on the 'nvdimm_bus_type' bus.

A result of this change is that ndbusX devices now appear under
/sys/bus/nd/devices.  In fact this makes /sys/class/nd somewhat
redundant, but removing that will need to take a long deprecation period
given its use by ndctl binaries in the field.

This change naturally pulls code from drivers/nvdimm/core.c to
drivers/nvdimm/bus.c, so it is a nice code organization clean-up as
well.

Cc: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-07-23 11:06:33 -07:00
Vishal Verma
5bf0b6e1af pmem: clarify a debug print in pmem_clear_poison
Prefix the sector number being cleared with a '0x' to make it clear that
this is a hex value.

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-07-23 11:06:33 -07:00
Dan Williams
fd1d961dd6 x86/insn: remove pcommit
The pcommit instruction is being deprecated in favor of either ADR
(asynchronous DRAM refresh: flush-on-power-fail) at the platform level, or
posted-write-queue flush addresses as defined by the ACPI 6.x NFIT (NVDIMM
Firmware Interface Table).

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Acked-by: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-07-23 11:04:23 -07:00
Dan Williams
dfa169bbee Revert "KVM: x86: add pcommit support"
This reverts commit 8b3e34e46a.

Given the deprecation of the pcommit instruction, the relevant VMX
features and CPUID bits are not going to be rolled into the SDM.  Remove
their usage from KVM.

Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-07-23 11:04:23 -07:00
Marc Zyngier
4c47eb1c18 arm64: KVM: VHE: Context switch MDSCR_EL1
The kprobe enablement work has uncovered that changes made by
a guest to MDSCR_EL1 were propagated to the host when VHE was
enabled, leading to unexpected exception being delivered.

Moving this register to the list of registers that are always
context-switched fixes the issue.

Fixes: 9c6c356832 ("arm64: KVM: VHE: Split save/restore of registers shared between guest and host")
Cc: stable@vger.kernel.org #4.6
Reported-by: Tirumalesh Chalamarla <Tirumalesh.Chalamarla@cavium.com>
Tested-by: Tirumalesh Chalamarla <Tirumalesh.Chalamarla@cavium.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2016-07-23 18:07:12 +02:00
Mauro Carvalho Chehab
d271d3d9b3 [media] cx23885-cardlist.rst: add a new card
add card Hauppauge WinTV-QuadHD-DVB to the list.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-07-23 08:14:48 -03:00
Mauro Carvalho Chehab
564aaf6920 [media] doc-rst: add some needed escape codes
Some extra escape codes are needed to avoid Sphinx to not
identify the tags.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-07-23 08:05:02 -03:00