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Author SHA1 Message Date
Aneesh Kumar K.V
049d567af2 powerpc/mm: Introduce _PAGE_LARGE software pte bits
This patch adds a new software defined pte bit. We use the reserved
fields of ISA 3.0 pte definition since we will only be using this on DD1
code paths. We can possibly look at removing this code later.

The software bit will be used to differentiate between 64K/4K and 2M
ptes. This helps in finding the page size mapping by a pte so that we
can do efficient tlb flush.

We don't support 1G hugetlb pages yet. So we add a DEBUG WARN_ON to
catch wrong usage.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-11-28 22:37:41 +11:00
Aneesh Kumar K.V
ccf17c8b5c powerpc/mm/hugetlb: Handle hugepage size supported by hash config
W.r.t hash page table config, we support 16MB and 16GB as the hugepage
size. Update the hstate_get_psize to handle 16M and 16G.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-11-28 22:34:48 +11:00
Aneesh Kumar K.V
bee8b3b56d powerpc/mm: Rename hugetlb-radix.h to hugetlb.h
We will start moving some book3s specific hugetlb functions there.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-11-28 22:34:47 +11:00
Nicholas Piggin
ae88f7b9af powerpc/64e: Don't branch to dot symbols
This converts one that was missed by b1576fec7f ("powerpc: No need
to use dot symbols when branching to a function").

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-11-28 22:32:30 +11:00
Nicholas Piggin
f87f253bac powerpc/64e: Convert cmpi to cmpwi in head_64.S
From 80f23935ca ("powerpc: Convert cmp to cmpd in idle enter sequence"):

  PowerPC's "cmp" instruction has four operands. Normally people write
  "cmpw" or "cmpd" for the second cmp operand 0 or 1. But, frequently
  people forget, and write "cmp" with just three operands.

  With older binutils this is silently accepted as if this was "cmpw",
  while often "cmpd" is wanted. With newer binutils GAS will complain
  about this for 64-bit code. For 32-bit code it still silently assumes
  "cmpw" is what is meant.

In this case, cmpwi is called for, so this is just a build fix for
new toolchains.

Cc: stable@vger.kernel.org # v3.0+
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-11-28 22:32:29 +11:00
Bartosz Golaszewski
878e908ad9 ARM: dts: da850: enable memctrl and mstpri nodes per board
Currently the memory controller and master priorities drivers are
enabled in da850.dtsi. For boards for which there are no settings
defined, this makes these drivers emit error messages.

Disable the nodes in da850.dtsi and only enable them for da850-lcdk -
the only board that currently needs them.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
2016-11-28 15:51:29 +05:30
Fenghua Yu
0efc89be94 x86/intel_rdt: Update task closid immediately on CPU in rmdir and unmount
When removing a sub directory/rdtgroup by rmdir or umount, closid in a
task in the sub directory is set to default rdtgroup's closid which is 0.
If the task is running on a CPU, the PQR_ASSOC MSR is only updated
when the task runs through a context switch. Up to the context switch,
the task runs with the wrong closid.

Make the change immediately effective by invoking a smp function call on
all CPUs which are running moved task. If one of the affected tasks was
moved or scheduled out before the function call is executed on the CPU the
only damage is the extra interruption of the CPU.

[ tglx: Reworked it to avoid blindly interrupting all CPUs and extra loops ]

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Cc: "Ravi V Shankar" <ravi.v.shankar@intel.com>
Cc: "Tony Luck" <tony.luck@intel.com>
Cc: "Sai Prakhya" <sai.praneeth.prakhya@intel.com>
Cc: "Vikas Shivappa" <vikas.shivappa@linux.intel.com>
Cc: "H. Peter Anvin" <h.peter.anvin@intel.com>
Link: http://lkml.kernel.org/r/1479511084-59727-2-git-send-email-fenghua.yu@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-11-28 11:07:50 +01:00
Fenghua Yu
2659f46da8 x86/intel_rdt: Fix setting of closid when adding CPUs to a group
There was a cut & paste error when adding code to update the per-cpu
closid when changing the bitmask of CPUs to an rdt group.

The update erronously assigns the closid of the default group to the CPUs
which are moved to a group instead of assigning the closid of their new
group. Use the proper closid.

Fixes: f410770293 ("x86/intel_rdt: Update percpu closid immeditately on CPUs affected by change")
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Cc: "Ravi V Shankar" <ravi.v.shankar@intel.com>
Cc: "Tony Luck" <tony.luck@intel.com>
Cc: "Sai Prakhya" <sai.praneeth.prakhya@intel.com>
Cc: "Vikas Shivappa" <vikas.shivappa@linux.intel.com>
Cc: "H. Peter Anvin" <h.peter.anvin@intel.com>
Link: http://lkml.kernel.org/r/1479511084-59727-1-git-send-email-fenghua.yu@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-11-28 11:07:50 +01:00
Ingo Molnar
a293b3954a x86/sched: Use #include <linux/mutex.h> instead of #include <asm/mutex.h>
asm/mutex.h is gone from the locking tree, which makes sched/core break the build.

Use linux/mutex.h instead, which is the canonical method.

Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: peterz@infradead.org
Cc: jolsa@redhat.com
Cc: rjw@rjwysocki.net
Cc: bp@suse.de
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-11-28 09:43:49 +01:00
Axel Haslam
b5e1438cf9 ARM: davinci: da830-evm: use gpio descriptor for mmc pins
Currently the mmc driver is polling the gpio to know if the
card was removed.

By using a gpio descriptor instead of the platform callbacks,
the driver will be able to register the gpio using the mmc core
APIs designed for this purpose.

This has the advantage that an irq will be registered, and
polling is no longer needed. Also, a dependency on platform
callbacks is removed for this board.

Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
[nsekhar@ti.com: minor commit message edit]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
2016-11-28 14:01:17 +05:30
Axel Haslam
bdf0e8364f ARM: davinci: da850-evm: use gpio descriptor for mmc pins
Currently the mmc driver is polling the gpio to know if the
card was removed.

By using a gpio descriptor instead of the platform callbacks,
the driver will be able to register the gpio using the mmc core
APIs designed for this purpose.

This has the advantage that an irq will be registered, and
polling is no longer needed. Also, a dependency on platform
callbacks is removed for this board.

Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
[nsekhar@ti.com: minor commit message edit]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
2016-11-28 14:01:16 +05:30
Axel Haslam
c69f43fb4f ARM: davinci: hawk: use gpio descriptor for mmc pins
Currently the mmc driver is polling the gpio to know if the
card was removed.

By using a gpio descriptor instead of the platform callbacks,
the driver will be able to register the gpio using the mmc core
APIs designed for this purpose.

This has the advantage that an irq will be registered, and
polling is no longer needed. Also, a dependency on platform
callbacks is removed for this board.

Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
2016-11-28 14:00:55 +05:30
Greg Kroah-Hartman
0edbf9e552 Merge 4.9-rc7 into usb-next
We want the USB fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-28 08:34:10 +01:00
Paul Bolle
9190e21780 x86/build: Remove three unneeded genhdr-y entries
In x86's include/asm/Kbuild three entries are appended to the genhdr-y make
variable:

    genhdr-y += unistd_32.h
    genhdr-y += unistd_64.h
    genhdr-y += unistd_x32.h

The same entries are also appended to that variable in
include/uapi/asm/Kbuild. So commit:

  10b63956fc ("UAPI: Plumb the UAPI Kbuilds into the user header installation and checking")

... removed these three entries from include/asm/Kbuild. But, apparently, some
merge conflict resolution re-added them.

The net effect is, in short, that the genhdr-y make variable contains these
file names twice and, as a consequence, that the corresponding headers get
installed twice. And so the build prints:

  INSTALL usr/include/asm/ (65 files)

... while in reality only 62 files are installed in that directory.

Nothing breaks because of all that, but it's a good idea to finally remove
these unneeded entries nevertheless.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
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/1480077707-2837-1-git-send-email-pebolle@tiscali.nl
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-11-28 07:49:17 +01:00
Paul Bolle
06cbbac0f5 x86/build: Don't use $(LINUXINCLUDE) twice
The make variable KBUILD_CFLAGS contains $(LINUXINCLUDE). But the build
already picks up $(LINUXINCLUDE) from scripts/Makefile.lib. The net effect
is that the (long) list of include directories is used twice.

This is harmless but pointless. So stop using $(LINUXINCLUDE) twice.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1480077514-2586-1-git-send-email-pebolle@tiscali.nl
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-11-28 07:49:17 +01:00
Josh Poimboeuf
55f856e640 x86/unwind: Fix guess-unwinder regression
My attempt at fixing some KASAN false positive warnings was rather brain
dead, and it broke the guess unwinder.  With frame pointers disabled,
/proc/<pid>/stack is broken:

  # cat /proc/1/stack
  [<ffffffffffffffff>] 0xffffffffffffffff

Restore the code flow to more closely resemble its previous state, while
still using READ_ONCE_NOCHECK() macros to silence KASAN false positives.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: c2d75e03d6 ("x86/unwind: Prevent KASAN false positive warnings in guess unwinder")
Link: http://lkml.kernel.org/r/b824f92c2c22eca5ec95ac56bd2a7c84cf0b9df9.1480309971.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-11-28 07:47:54 +01:00
Peter Foley
adee8705d2 x86/build: Annotate die() with noreturn to fix build warning on clang
Fixes below warning with clang:

  In file included from ../arch/x86/tools/relocs_64.c:17:
  ../arch/x86/tools/relocs.c:977:6: warning: variable 'do_reloc' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]

Signed-off-by: Peter Foley <pefoley2@pefoley.com>
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/20161126222229.673-1-pefoley2@pefoley.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-11-28 07:47:22 +01:00
Borislav Petkov
20ab667771 x86/platform/olpc: Fix resume handler build warning
Fix:

  arch/x86/platform/olpc/olpc-xo15-sci.c:199:12: warning: ‘xo15_sci_resume’
  defined but not used [-Wunused-function]
   static int xo15_sci_resume(struct device *dev)
              ^

which I see in randconfig builds here.

Signed-off-by: Borislav Petkov <bp@suse.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/20161126142706.13602-1-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-11-28 07:46:03 +01:00
Borislav Petkov
6248f45674 x86/boot/64: Optimize fixmap page fixup
Single-stepping through head_64.S made me look at the fixmap page PTEs
fixup loop:

So we're going through the whole level2_fixmap_pgt 4K page, looking at
whether PAGE_PRESENT is set in those PTEs and add the delta between
where we're compiled to run and where we actually end up running.

However, if that delta is 0 (most cases) we go through all those 512
PTEs for no reason at all. Oh well, we add 0 but that's no reason to me.

Skipping that useless fixup gives us a boot speedup of 0.004 seconds in
my guest. Not a lot but considering how cheap it is, I'll take it. Here
is the printk time difference:

before:
  ...
  [    0.000000] tsc: Marking TSC unstable due to TSCs unsynchronized
  [    0.013590] Calibrating delay loop (skipped), value calculated using timer frequency..
		8027.17 BogoMIPS (lpj=16054348)
  [    0.017094] pid_max: default: 32768 minimum: 301
  ...

after:
  ...
  [    0.000000] tsc: Marking TSC unstable due to TSCs unsynchronized
  [    0.009587] Calibrating delay loop (skipped), value calculated using timer frequency..
		8026.86 BogoMIPS (lpj=16053724)
  [    0.013090] pid_max: default: 32768 minimum: 301
  ...

For the other two changes converting naked numbers to defines:

  # arch/x86/kernel/head_64.o:

   text    data     bss     dec     hex filename
   1124  290864    4096  296084   48494 head_64.o.before
   1124  290864    4096  296084   48494 head_64.o.after

md5:
   87086e202588939296f66e892414ffe2  head_64.o.before.asm
   87086e202588939296f66e892414ffe2  head_64.o.after.asm

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@kernel.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: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20161125111448.23623-1-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-11-28 07:45:17 +01:00
Fabien Parent
e177e7307c ARM: dts: da850-lcdk: Add ethernet0 alias to DT
In order to avoid Linux generating a random mac address on every boot,
add an ethernet0 alias that will allow u-boot to patch the dtb with
the MAC address programmed into the EEPROM.

Signed-off-by: Fabien Parent <fparent@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
2016-11-28 10:55:36 +05:30
Suraj Jitindar Singh
908a09359e KVM: PPC: Book3S HV: Comment style and print format fixups
Fix comment block to match kernel comment style.

Fix print format from signed to unsigned.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2016-11-28 11:48:47 +11:00
Suraj Jitindar Singh
f4944613ad KVM: PPC: Decrease the powerpc default halt poll max value
KVM_HALT_POLL_NS_DEFAULT is an arch specific constant which sets the
default value of the halt_poll_ns kvm module parameter which determines
the global maximum halt polling interval.

The current value for powerpc is 500000 (500us) which means that any
repetitive workload with a period of less than that can drive the cpu
usage to 100% where it may have been mostly idle without halt polling.
This presents the possibility of a large increase in power usage with
a comparatively small performance benefit.

Reduce the default to 10000 (10us) and a user can tune this themselves
to set their affinity for halt polling based on the trade off between power
and performance which they are willing to make.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2016-11-28 11:48:47 +11:00
Suraj Jitindar Singh
e03f3921e5 KVM: PPC: Book3S HV: Add check for module parameter halt_poll_ns
The kvm module parameter halt_poll_ns defines the global maximum halt
polling interval and can be dynamically changed by writing to the
/sys/module/kvm/parameters/halt_poll_ns sysfs file. However in kvm-hv
this module parameter value is only ever checked when we grow the current
polling interval for the given vcore. This means that if we decrease the
halt_poll_ns value below the current polling interval we won't see any
effect unless we try to grow the polling interval above the new max at some
point or it happens to be shrunk below the halt_poll_ns value.

Update the halt polling code so that we always check for a new module param
value of halt_poll_ns and set the current halt polling interval to it if
it's currently greater than the new max. This means that it's redundant to
also perform this check in the grow_halt_poll_ns() function now.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2016-11-28 11:48:47 +11:00
Suraj Jitindar Singh
307d93e476 KVM: PPC: Book3S HV: Use generic kvm module parameters
The previous patch exported the variables which back the module parameters
of the generic kvm module. Now use these variables in the kvm-hv module
so that any change to the generic module parameters will also have the
same effect for the kvm-hv module. This removes the duplication of the
kvm module parameters which was redundant and should reduce confusion when
tuning them.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2016-11-28 11:48:47 +11:00
Linus Torvalds
ff17bf8a0d Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS fixes from Ralf Baechle:
 "Another round of MIPS fixes for 4.9:

   - Fix unreadable output in __do_page_fault due to the KERN_CONT
     patchset

   - Correctly handle MIPS R6 fixes to the c0_wired register"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: mm: Fix output of __do_page_fault
  MIPS: Mask out limit field when calculating wired entry count
2016-11-27 08:22:59 -08:00
David S. Miller
0b42f25d2f Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
udplite conflict is resolved by taking what 'net-next' did
which removed the backlog receive method assignment, since
it is no longer necessary.

Two entries were added to the non-priv ethtool operations
switch statement, one in 'net' and one in 'net-next, so
simple overlapping changes.

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-26 23:42:21 -05:00
Linus Torvalds
a56f3eb2cd Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM fix from Russell King:
 "This resolves the ksyms issues by reverting the commit which
  introduced the breakage"

There was what I consider to be a better fix, but it's late in the rc
game, so I'll take the revert.

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  Revert "arm: move exports to definitions"
2016-11-26 15:26:20 -08:00
Linus Torvalds
fc13ca191e KVM fixes for v4.9-rc7
Four fixes for bugs found by syzkaller on x86, all for stable.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM fixes from Radim Krčmář:
 "Four fixes for bugs found by syzkaller on x86, all for stable"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: check for pic and ioapic presence before use
  KVM: x86: fix out-of-bounds accesses of rtc_eoi map
  KVM: x86: drop error recovery in em_jmp_far and em_ret_far
  KVM: x86: fix out-of-bounds access in lapic
2016-11-26 12:18:59 -08:00
Linus Torvalds
39c1573748 powerpc fixes for 4.9 #6
Fixes marked for stable:
  - Set missing wakeup bit in LPCR on POWER9 (Benjamin Herrenschmidt)
  - Fix the early OPAL console wrappers (Oliver O'Halloran)
  - Fixup kernel read only mapping (Aneesh Kumar K.V)
 
 Fixes for code merged this cycle:
  - Fix missing CRCs, add more asm-prototypes.h declarations (Nicholas Piggin)
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Merge tag 'powerpc-4.9-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Fixes marked for stable:
   - Set missing wakeup bit in LPCR on POWER9
   - Fix the early OPAL console wrappers
   - Fixup kernel read only mapping

  Fixes for code merged this cycle:
   - Fix missing CRCs, add more asm-prototypes.h declarations"

* tag 'powerpc-4.9-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/mm: Fixup kernel read only mapping
  powerpc/boot: Fix the early OPAL console wrappers
  powerpc: Fix missing CRCs, add more asm-prototypes.h declarations
  powerpc: Set missing wakeup bit in LPCR on POWER9
2016-11-26 11:24:03 -08:00
Balbir Singh
3b10d0095a powerpc/mm/radix: Prevent kernel execution of user space
ISA 3 defines new encoded access authority that allows instruction
access prevention in privileged mode and allows normal access
to problem state. This patch just enables IAMR (Instruction Authority
Mask Register), enabling AMR would require more work.

I've tested this with a buggy driver and a simple payload. The payload
is specific to the build I've tested.

mpe: Also tested with LKDTM:

  # echo EXEC_USERSPACE > /sys/kernel/debug/provoke-crash/DIRECT
  lkdtm: Performing direct entry EXEC_USERSPACE
  lkdtm: attempting ok execution at c0000000005bf560
  lkdtm: attempting bad execution at 00003fff8d940000
  Unable to handle kernel paging request for instruction fetch
  Faulting instruction address: 0x3fff8d940000
  Oops: Kernel access of bad area, sig: 11 [#1]
  NIP: 00003fff8d940000 LR: c0000000005bfa58 CTR: 00003fff8d940000
  REGS: c0000000f1fcf900 TRAP: 0400   Not tainted  (4.9.0-rc5-compiler_gcc-6.2.0-00109-g956dbc06232a)
  MSR: 9000000010009033 <SF,HV,EE,ME,IR,DR,RI,LE>  CR: 48002222  XER: 00000000
  ...
  Call Trace:
    lkdtm_EXEC_USERSPACE+0x104/0x120 (unreliable)
    lkdtm_do_action+0x3c/0x80
    direct_entry+0x100/0x1b0
    full_proxy_write+0x94/0x100
    __vfs_write+0x3c/0x1b0
    vfs_write+0xcc/0x230
    SyS_write+0x60/0x110
    system_call+0x38/0xfc

Signed-off-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-11-26 18:48:04 +11:00
Linus Torvalds
3ad0e83cf8 Merge branch 'parisc-4.9-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc fixes from Helge Deller:
 "On parisc we were still seeing occasional random segmentation faults
  and memory corruption on SMP machines. Dave Anglin then looked again
  at the TLB related code and found two issues in the PCI DMA and
  generic TLB flush functions.

  Then, in our startup code we had some timing of the cache and TLB
  functions to calculate a threshold when to use a complete TLB/cache
  flush or just to flush a specific range. This code produced a race
  with newly started CPUs and thus lead to occasional kernel crashes
  (due to stale TLB/cache entries). The patch by Dave fixes this issue
  by flushing the local caches before starting secondary CPUs and by
  removing the race.

  The last problem fixed by this series is that we quite often suffered
  from hung tasks and self-detected stalls on the CPUs. It was somehow
  clear that this was related to the (in v4.7) newly introduced cr16
  clocksource and the own implementation of sched_clock(). I replaced
  the open-coded sched_clock() function and switched to the generic
  sched_clock() implementation which seems to have fixed this isse as
  well.

  All patches have been sucessfully tested on a variety of machines,
  including our debian buildd servers.

  All patches (beside the small pr_cont fix) are tagged for stable
  releases"

* 'parisc-4.9-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Also flush data TLB in flush_icache_page_asm
  parisc: Fix race in pci-dma.c
  parisc: Switch to generic sched_clock implementation
  parisc: Fix races in parisc_setup_cache_timing()
  parisc: Fix printk continuations in system detection
2016-11-25 16:47:15 -08:00
Arnd Bergmann
d0bf34f39b Allwinner DT additions for 4.10, bis
The usual bunch of DT additions, but most notably:
   - A31 DRM driver
   - A31 audio codec
   - WiFi for the A80-Based boards and the CHIP
   - Support for the NextThing Co CHIP Pro (the first board with NAND
     enabled)
   - New board: NanoPi M1
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Merge tag 'sunxi-dt-for-4.10-bis' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into next/dt

Pull "Allwinner DT additions for 4.10, bis" from Maxime Ripard:

The usual bunch of DT additions, but most notably:
  - A31 DRM driver
  - A31 audio codec
  - WiFi for the A80-Based boards and the CHIP
  - Support for the NextThing Co CHIP Pro (the first board with NAND
    enabled)
  - New board: NanoPi M1

* tag 'sunxi-dt-for-4.10-bis' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux: (41 commits)
  ARM: dts: sun6i: hummingbird-a31: Enable display output through VGA bridge
  ARM: dts: sun5i: Add touchscreen node to reference-design-tablet.dtsi
  ARM: sunxi: Add the missing clocks to the pinctrl nodes
  ARM: dts: sun7i: bananapi-m1-plus: Enable USB OTG
  ARM: dts: sun7i: bananapi-m1-plus: Add PMIC regulators
  ARM: dts: sun7i: bananapi-m1-plus: Enable USB PHY for USB host support
  ARM: sun8i: sina33: Enable USB gadget
  ARM: dts: sun8i: reference-design-tablet: ldo_io1 is vcc-touchscreen
  ARM: dts: sun8i: replace enable-sdio-wakeup with wakeup-source for BananaPi M1+
  ARM: gr8: evb: Add i2s codec
  ARM: dts: sun6i: sina31s: Enable internal audio codec
  ARM: dts: sun6i: hummingbird: Enable internal audio codec
  ARM: dts: sun6i: Add audio codec device node
  ARM: gr8: evb: Enable SPDIF
  ARM: dts: sun8i: Add SPI controller node in H3
  ARM: dts: sun8i: Add SPI pinctrl node in H3
  ARM: dts: sun8i: Add dts file for NanoPi M1 SBC
  ARM: dts: sun8i: Use the common file in NanoPi NEO SBC
  ARM: dts: sun8i: Add common dtsi file for NanoPi SBCs
  ARM: dts: sun9i: cubieboard4: Enable AP6330 WiFi
  ...
2016-11-26 00:52:10 +01:00
Arnd Bergmann
ba13357e68 mvebu dt64 for 4.10 (part 2)
Fix DTC warning on Armada 37xx and 7K/8K
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Merge tag 'mvebu-dt64-4.10-2' of git://git.infradead.org/linux-mvebu into next/dt64

Pull "mvebu dt64 for 4.10 (part 2)" from Gregory CLEMENT:

Fix DTC warning on Armada 37xx and 7K/8K

* tag 'mvebu-dt64-4.10-2' of git://git.infradead.org/linux-mvebu:
  ARM64: dts: marvell: Fixup memory DT warning for Armada 37xx
  arm64: dts: marvell: Fixup config-space DT warning For Armada 7K/8K
  arm64: dts: marvell: Fixup internal-regs DT warning for Armada 37xx
2016-11-26 00:49:49 +01:00
Arnd Bergmann
e70a13e7d7 mvebu soc for 4.10 (part 1)
remove legacy support of orion5x ls-chl
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Merge tag 'mvebu-soc-4.10-1' of git://git.infradead.org/linux-mvebu into next/soc

Pull "mvebu soc for 4.10 (part 1)" from Gregory CLEMENT:

remove legacy support of orion5x ls-chl

* tag 'mvebu-soc-4.10-1' of git://git.infradead.org/linux-mvebu:
  ARM: orion5x: remove legacy support of ls-chl
2016-11-26 00:48:43 +01:00
Arnd Bergmann
6c3026980e mvebu dt for 4.10 (part 1)
Add missing pinmux declaration for netgear NASes
 Fix i2c compatible string for netgear NASes
 Fix on a wrong comment about PLL frequency
 Fix spelling mistake of the manufacturer's name of the Topkick
 Add dt support for the orion5x ls-chl Linkstation device
 First step of fixing DTC warning for Armada 370, 375 and XP
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Merge tag 'mvebu-dt-4.10-1' of git://git.infradead.org/linux-mvebu into next/dt

Pull "mvebu dt for 4.10 (part 1)" from Gregory CLEMENT:

Add missing pinmux declaration for netgear NASes
Fix i2c compatible string for netgear NASes
Fix on a wrong comment about PLL frequency
Fix spelling mistake of the manufacturer's name of the Topkick
Add dt support for the orion5x ls-chl Linkstation device
First step of fixing DTC warning for Armada 370, 375 and XP

* tag 'mvebu-dt-4.10-1' of git://git.infradead.org/linux-mvebu: (30 commits)
  ARM: dts: armada-375: Fixup ethernet child DT warning
  ARM: dts: armada-375: Fixup memory DT warning
  ARM: dts: armada-375: Remove skeleton.dtsi
  ARM: dts: armada-375: Fixup pinctrl DT warnings
  ARM: dts: armada-375: Fixup pcie DT warnings
  ARM: dts: armada-375: Fixup mdio DT warning
  ARM: dts: armada-375: Use the node labels
  ARM: dts: armada-375: Add node labels
  ARM: dts: armada-370-xp: Fixup regulator DT warning
  ARM: dts: armada-370-xp: Remove button address and fixup names
  ARM: dts: armada-370-xp: Remove address from dsa unit name
  ARM: dts: armada-370-xp: Fixup memory DT warning
  ARM: dts: armada-370-xp: Fixup l2-cache DT warning
  ARM: dts: armada-370-xp: Remove skeleton.dtsi
  ARM: dts: armada-370: Fixup pcie DT warnings
  ARM: dts: armada-xp: Fixup pcie DT warnings
  ARM: dts: armada-370-xp: Fixup mdio DT warning
  ARM: dts: armada-370-xp: Use the node labels
  ARM: dts: armada-370-xp: add node labels
  ARM: dts: armada-370-xp: move the cpurst node in the common file
  ...
2016-11-26 00:45:02 +01:00
Arnd Bergmann
192a5e8c96 - Add SMP support for the Oxford Semiconductor OX820 SoC
from http://lkml.kernel.org/r/20161021085848.1754-1-narmstrong@baylibre.com
 
 Changes since v1 Pull Request at : http://lkml.kernel.org/r/1305c61f-b1ef-7caf-7788-67e2b907e873@baylibre.com
  - Clarify copyright dates in commit message
  - Remove linux/arch/... lines from the top of the files
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Merge tag 'oxnas-arm-soc-for-4.10-v2' of https://github.com/OXNAS/linux into next/soc

Pull "ARM: OXNAS SoC updates for 4.10" from Neil Armstrong:

- Add SMP support for the Oxford Semiconductor OX820 SoC
from http://lkml.kernel.org/r/20161021085848.1754-1-narmstrong@baylibre.com

Changes since v1 Pull Request at : http://lkml.kernel.org/r/1305c61f-b1ef-7caf-7788-67e2b907e873@baylibre.com
 - Clarify copyright dates in commit message
 - Remove linux/arch/... lines from the top of the files

* tag 'oxnas-arm-soc-for-4.10-v2' of https://github.com/OXNAS/linux:
  ARM: oxnas: Add OX820 config and makefile entry
  ARM: oxnas: Add OX820 SMP support
2016-11-26 00:30:46 +01:00
Arnd Bergmann
112525b147 Qualcomm Device Tree Changes for v4.10 - v2
* Add EBI2 support to MSM8660
 * Add SMSC ethernet support to APQ8060
 * Add support for display, pstore, iommu, and hdmi to APQ8064
 * Add SDHCI node to MSM8974 Hammerhead
 * Add WP8548 MangOH board support (MDM9615)
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Merge tag 'qcom-dts-for-4.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux into next/dt

Pull "Qualcomm Device Tree Changes for v4.10 - v2" from Andy Gross:

* Add EBI2 support to MSM8660
* Add SMSC ethernet support to APQ8060
* Add support for display, pstore, iommu, and hdmi to APQ8064
* Add SDHCI node to MSM8974 Hammerhead
* Add WP8548 MangOH board support (MDM9615)

* tag 'qcom-dts-for-4.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux:
  ARM: dts: add SMSC ethernet on the APQ8060 Dragonboard
  ARM: dts: add EBI2 to the Qualcomm MSM8660 DTSI
  arm: dts: qcom: apq8064-nexus7: Add pstore support to nexus7
  arm: dts: qcom: apq8064-nexus7: Add DSI and panel nodes
  arm: dts: qcom: apq8064: Add dsi, gpu and iommu nodes
  arm: dts: qcom: apq8064-ifc6410: Add HDMI support
  arm: dts: qcom: apq8064: Add display DT nodes
  ARM: dts: qcom: msm8974-hammerhead: Add sdhci1 node
  dt-bindings: arm: Add Sierra Wireless modules bindings
  ARM: dts: Add WP8548 based MangOH Green board DTS
  ARM: dts: Add Sierra Wireless WP8548 dtsi
  dt-bindings: qcom: Add MDM9615 bindings
  ARM: dts: Add MDM9615 dtsi
2016-11-26 00:27:56 +01:00
Arnd Bergmann
2ad5c1a5fc This device-tree pxa update brings :
- pxa25x support
  - cpu operating points in preparation for cpufreq-dt
  - small fixes
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Merge tag 'pxa-dt-4.10' of https://github.com/rjarzmik/linux into next/dt

Pull "This device-tree pxa update brings" from Robert Jarzmik:

 - pxa25x support
 - cpu operating points in preparation for cpufreq-dt
 - small fixes

* tag 'pxa-dt-4.10' of https://github.com/rjarzmik/linux:
  ARM: dts: pxa: add pxa27x cpu operating points
  ARM: dts: pxa: add pxa25x cpu operating points
  ARM: dts: pxa: fix gpio0 and gpio1 interrupts
  ARM: dts: pxa: fix no. of gpio cells in the pxa gpio binding documentation
  ARM: dts: pxa: add pxa25x .dtsi file
2016-11-26 00:25:04 +01:00
Geliang Tang
4362321817 ARM: lpc32xx: drop duplicate header device.h
Drop duplicate header device.h from phy3250.c.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Reviewed-by: Sylvain Lemieux <slemieux.tyco@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2016-11-26 00:22:51 +01:00
Geliang Tang
7548dd7e47 ARM: ixp4xx: drop duplicate header gpio.h
Drop duplicate header gpio.h from dsmg600-setup.c.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2016-11-26 00:21:50 +01:00
Alexandre TORGUE
292b44c3a3 ARM: configs: Add new config fragment to change RAM start point
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2016-11-26 00:20:09 +01:00
Niklas Cassel
c00f318841 ARM: dts: artpec: add pcie support
Add PCIe support to the ARTPEC-6 SoC. This uses the existing
pcie-artpec6 driver.
So, all that is needed is device tree entries in the DTS.

Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Jesper Nilsson <jespern@axis.com>
2016-11-26 00:11:30 +01:00
Niklas Cassel
048f789b95 ARM: ARTPEC-6: add select MFD_SYSCON to MACH_ARTPEC6
Since the ARTPEC-6 machine port already uses syscon,
MACH_ARTPEC6 should select MFD_SYSCON.

Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Jesper Nilsson <jespern@axis.com>
2016-11-26 00:06:34 +01:00
Niklas Cassel
afafe375df ARM: dts: artpec: add pcie support
Add PCIe support to the ARTPEC-6 SoC. This uses the existing
pcie-artpec6 driver.
So, all that is needed is device tree entries in the DTS.

Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Jesper Nilsson <jespern@axis.com>
2016-11-26 00:06:20 +01:00
Arnd Bergmann
7677796fe6 - Add DTSI for Oxford Semiconductor OX820
- Add DTS for Cloud Engines PogoPlug v3 board
 - Fix MAINTAINERS Oxnas entry for dts files
 from http://lkml.kernel.org/r/20161102141850.25164-1-narmstrong@baylibre.com
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Merge tag 'oxnas-arm-soc-dt-for-4.10' of https://github.com/OXNAS/linux into next/dt

Pull "ARM: OXNAS SoC DT updates for 4.10" from Neil Armstrong:

- Add DTSI for Oxford Semiconductor OX820
- Add DTS for Cloud Engines PogoPlug v3 board
- Fix MAINTAINERS Oxnas entry for dts files
from http://lkml.kernel.org/r/20161102141850.25164-1-narmstrong@baylibre.com

* tag 'oxnas-arm-soc-dt-for-4.10' of https://github.com/OXNAS/linux:
  MAINTAINERS: oxnas: Add new files definitions
  ARM: dts: Add support for OX820 and Pogoplug V3
2016-11-25 23:59:15 +01:00
Arnd Bergmann
f2e45e804d Merge branch 'v4.9-rc2-arm-configs-pata' of https://github.com/bzolnier/linux into next/defconfig
Merge "IDE to PATA change in ARM defconfigs from Bartlomiej Zolnierkiewicz:

On Monday, October 31, 2016 07:14:13 PM Bartlomiej Zolnierkiewicz wrote:
> On Monday, October 31, 2016 03:46:22 PM Russell King - ARM Linux wrote:
> > On Wed, Oct 26, 2016 at 07:01:12PM +0200, Bartlomiej Zolnierkiewicz wrote:
> > > On Wednesday, July 13, 2016 04:37:31 PM Arnd Bergmann wrote:
> > > > I'd be fine with just getting a pull request with all the patches that
> > > > had no negative feedback and that were not already applied (if any).
> > >
> > > Here it is (sorry for taking so long).
> >
> > I've just been digging in the dmesg logs from when I was using the
> > Assabet+Neponset as my firewall, and it was having to use the IDE
> > ide-cs driver rather than the pata pcmcia driver.
> >
> > I don't recall whether the pata pcmcia driver was a problem or not,
> > as the PCMCIA interface can't cope with _any_ 32-bit accesses.  I
> > think PATA tries to use the "highest" possible access size by
> > default...
>
> It doesn't actually - it defaults to 16-bits for PIO data access and
> you must explicitly enable 32-bits using ATA_PFLAG_PIO32 port flag
> (pata_pcmcia doesn't set it so it should be okay).  Also taskfile
> registers are accessed using 8-bits access by default transport
> functions (which are used by pata_pcmcia).

Please also note that:

- assebet_defconfig currently doesn't even enable ide-cs
  (CONFIG_BLK_DEV_IDECS) in the mainline kernel

- neponset_defconfig doesn't even enable IDE (CONFIG_IDE)
  in the mainline kernel

so there is no risk of breaking anything..

* 'v4.9-rc2-arm-configs-pata' of https://github.com/bzolnier/linux:
  arm: spitz_defconfig: convert to use libata PATA drivers
  arm: s3c2410_defconfig: convert to use libata PATA drivers
  arm: netwinder_defconfig: convert to use libata PATA drivers
  arm: jornada720_defconfig: convert to use libata PATA drivers
  arm: ixp4xx_defconfig: convert to use libata PATA drivers
  arm: h3600_defconfig: convert to use libata PATA drivers
  arm: corgi_defconfig: convert to use libata PATA drivers
  arm: am200epdkit_defconfig: convert to use libata PATA drivers
  arm: omap1_defconfig: convert to use libata PATA drivers
  arm: collie_defconfig: convert to use libata PATA drivers
  arm: shannon_defconfig: disable IDE subsystem
  arm: mainstone_defconfig: disable IDE subsystem
  arm: lart_defconfig: disable IDE subsystem
  arm: cerfcube_defconfig: disable IDE subsystem
  arm: badge4_defconfig: disable IDE subsystem
  arm: assabet_defconfig: disable IDE subsystem
2016-11-25 23:17:35 +01:00
Arnd Bergmann
6e631f6d35 STi DT fix:
The I2C nodes are missing #address-cells and #size-cells.
 This is causing warning at device tree compilation when
 some I2C device sub-nodes are defined.
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Merge tag 'sti-dt-for-v4.9-rc-round2' of git://git.kernel.org/pub/scm/linux/kernel/git/pchotard/sti into fixes

Pull "STi DT fix" from Patrice Chotard:

The I2C nodes are missing #address-cells and #size-cells.
This is causing warning at device tree compilation when
some I2C device sub-nodes are defined.

* tag 'sti-dt-for-v4.9-rc-round2' of git://git.kernel.org/pub/scm/linux/kernel/git/pchotard/sti:
  ARM: dts: STiH407-family: fix i2c nodes
2016-11-25 22:38:51 +01:00
Arnd Bergmann
6895eae353 Allwinner fixes for 4.9, second iteration
A renaming of the GR8 DTSI and DTS to make it explicitly part of the sun5i
 family.
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Merge tag 'sunxi-fixes-for-4.9-2' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into fixes

Pull "Allwinner fixes for 4.9, second iteration" from Maxime Ripard:

A renaming of the GR8 DTSI and DTS to make it explicitly part of the sun5i
family.

* tag 'sunxi-fixes-for-4.9-2' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux:
  ARM: gr8: Rename the DTSI and relevant DTS
2016-11-25 22:36:00 +01:00
Uwe Kleine-König
26ca8b52d6 ARM: dts: add support for Turris Omnia
This machine is an open hardware router by cz.nic driven by a
Marvell Armada 385.

Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Signed-off-by: Tomas Hlavacek <tmshlvck@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
2016-11-25 17:11:34 +01:00
John David Anglin
5035b230e7 parisc: Also flush data TLB in flush_icache_page_asm
This is the second issue I noticed in reviewing the parisc TLB code.

The fic instruction may use either the instruction or data TLB in
flushing the instruction cache.  Thus, on machines with a split TLB, we
should also flush the data TLB after setting up the temporary alias
registers.

Although this has no functional impact, I changed the pdtlb and pitlb
instructions to consistently use the index register %r0.  These
instructions do not support integer displacements.

Tested on rp3440 and c8000.

Signed-off-by: John David Anglin  <dave.anglin@bell.net>
Cc: <stable@vger.kernel.org> # v3.16+
Signed-off-by: Helge Deller <deller@gmx.de>
2016-11-25 12:32:01 +01:00