Add support for the ELF auxv entry AT_HWCAP2 when running 32-bit
ELF binaries in compat mode.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Add ELF_HWCAP2 to the set of auxv entries that is passed to
a 32-bit ELF program running in 32-bit compat mode under a
64-bit kernel.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Currently we flush the entire dcache at boot within __cpu_setup, but
this is unnecessary as the booting protocol demands that the dcache is
invalid and off upon entering the kernel. The presence of the cache
flush only serves to hide bugs in bootloaders, and is not safe in the
presence of SMP.

In an SMP boot scenario the CPUs enter coherency outside of the kernel,
and the primary CPU enables its caches before bringing up secondary
CPUs. Therefore if any secondary CPU has an entry in its cache (in
violation of the boot protocol), the primary CPU might snoop it even if
the secondary CPU's cache is disabled. The boot-time cache flush only
serves to hide a firmware bug, and slows down a cpu boot unnecessarily.

This patch removes the unnecessary boot-time cache flush.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
[catalin.marinas@arm.com: make __flush_dcache_all local only]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Enable cpufreq and power kconfig menus on arm64 along with arm cpufreq
drivers. The power menu is needed for OPP support. At least on Calxeda
systems, the same cpufreq driver is used for arm and arm64 based
systems.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

psci_init() is written to return err code if something goes wrong. However,
the single user, setup_arch(), doesn't care about it. Moreover, every error
path is supplied with a clear message which is enough for pleasant debugging.

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Since 652af899

 "arm64: factor out spin-table
boot method" psci prefix's been introduced. We have a common pr_fmt, so clean
them up.

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

This patch adds support for DMA API cache maintenance on SoCs without
hardware device cache coherency.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Since arm64 does not support ISA, there is no need for early swiotlb
initialisation. This patch switches the DMA mapping code to
swiotlb_tlb_late_init_with_default_size(). A side effect of this is that
GFP_DMA is used for the swiotlb buffer and devices with a 32-bit
coherent mask are correctly supported.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

On arm64 we do not have two DMA zones, so it does not make sense to
implement ZONE_DMA32. This patch changes ZONE_DMA32 with ZONE_DMA, the
latter covering 32-bit dma address space to honour GFP_DMA allocations.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Remove some unnecessary bits that were apparently carried over from
another architecture's implementation:

- No need to get_page() the vdso text/data - these are part of the
  kernel image.
- No need for ClearPageReserved on the vdso text.
- No need to vmap the first text page to check the ELF header - this
  can be done through &vdso_start.

Also some minor cleanup:
- Use kcalloc for vdso_pagelist array allocation.
- Don't print on allocation failure, slab/slub will do that for us.

Signed-off-by: Nathan Lynch <nathan_lynch@mentor.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arm64_swiotlb_alloc/free_coherent name can be misleading
somtimes with CMA support being enabled after this
patch (c2104debc235b745265b64d610237a6833fd53)

Change this name to be more generic:
__dma_alloc/free_coherent

Signed-off-by: Ritesh Harjani <ritesh.harjani@gmail.com>
[catalin.marinas@arm.com: renamed arm64_swiotlb_dma_ops to coherent_swiotlb_dma_ops]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Change the soft_restart() routine to call cpu_reset() at its identity mapped
physical address.

The cpu_reset() routine must be called at its identity mapped physical address
so that when the MMU is turned off the instruction pointer will be at the correct
location in physical memory.

Signed-off-by: Geoff Levand <geoff@infradead.org> for Huawei, Linaro
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

This patch changes the idmap page table creation during boot to cover
the whole kernel image, allowing functions like cpu_reset() to be safely
called with the physical address.

This patch also simplifies the create_block_map asm macro to no longer
take an idmap argument and always use the phys/virt/end parameters. For
the idmap case, phys == virt.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Over the past couple of years, the generic mmu_gather gained range
tracking - 597e1c35 (mm/mmu_gather: enable tlb flush range in generic
mmu_gather), 2b047252 (Fix TLB gather virtual address range
invalidation corner cases) - and tlb_fast_mode() has been removed -
29eb7782

 (arch, mm: Remove tlb_fast_mode()).

The new mmu_gather structure is now suitable for arm64 and this patch
converts the arch asm/tlb.h to the generic code. One functional
difference is the shift_arg_pages() case where previously the code was
flushing the full mm (no tlb_start_vma call) but now it flushes the
range given to tlb_gather_mmu() (possibly slightly more efficient
previously).

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>

The patch moves the PCI I/O space (currently at 64K) before the
earlyprintk mapping and extends it to 16MB.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

processor debug state PSTATE.D is unmasked in smp call
clear_os_lock for secondary cpus. So debug state is still
masked in normal kernel context.  With this patch, unmask
debug state on secondary boot for the cpus in normal kernel
context. Now kgdb tests passed with multicore.

Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Add HAVE_ARCH_KGDB for arm64 Kconfig

Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

typecast instruction_pointer macro to unsigned long to
resolve following compiler warnings like
warning: format '%lx' expects argument of type 'long unsigned int',
but argument 2 has type 'u64' [-Wformat]

Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

The function kgdb_breakpoint() sets up break point at
compile time by calling arch_kgdb_breakpoint();
Though this call is surrounded by wmb() barrier,
the compile can still re-order the break point,
because this scheduling barrier is not a code motion
barrier in gcc.

Making kgdb_breakpoint() as noinline solves this problem
of code reording around break point instruction and also
avoids problem of being called as inline function from
other places

More details about discussion on this can be found here
http://comments.gmane.org/gmane.linux.ports.arm.kernel/269732



Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Add KGDB software step debugging support for EL1 debug
in AArch64 mode.

KGDB registers step debug handler with debug monitor.
On receiving 'step' command from GDB tool, target enables
software step debugging and step address is updated in ELR.

Software Step debugging is disabled when 'continue' command
is received

Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Add KGDB debug support for kernel debugging.
With this patch, basic KGDB debugging is possible.GDB register
layout is updated and GDB tool can establish connection with
target and can set/clear breakpoints.

Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Add macros to enable and disable to manage PSTATE.D
for debugging. The macros local_dbg_save and local_dbg_restore
are moved to irqflags.h file

KGDB boot tests fail because of PSTATE.D is masked.
unmask it for debugging support

Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Pull ARM SoC fixes from Olof Johansson:
 "A collection of fixes for ARM platforms.  Most are fixes for DTS
  files, mostly from DT conversion on OMAP which is still finding a few
  issues here and there.

  There's a couple of small stale code removal patches that we usually
  queue for the next release instead, but they seemed harmless enough to
  bring in now.

  Also, a fix for backlight on some PXA platforms, and a cache
  configuration fix for Tegra, etc"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (25 commits)
  MAINTAINERS: add additional ARM BCM281xx/BCM11xxx maintainer
  ARM: tegra: only run PL310 init on systems with one
  ARM: tegra: Add head numbers to display controllers
  ARM: imx6: build pm-imx6q.c independently of CONFIG_PM
  ARM: tegra: fix RTC0 alias for Cardhu
  ARM: dove: dt: revert PMU interrupt controller node
  Documentation: dt: OMAP: Update Overo/Tobi
  ARM: dts: Add support for both OMAP35xx and OMAP36xx Overo/Tobi
  ARM: dts: omap3-tobi: Use the correct vendor prefix
  ARM: dts: omap3-tobi: Fix boot with OMAP36xx-based Overo
  ARM: OMAP2+: Remove legacy macros for zoom platforms
  ARM: OMAP2+: Remove MACH_NOKIA_N800
  ARM: dts: N900: add missing compatible property
  ARM: dts: N9/N950: fix boot hang with 3.14-rc1
  ARM: OMAP1: nokia770: enable tahvo-usb
  ARM: OMAP2+: gpmc: fix: DT ONENAND child nodes not probed when MTD_ONENAND is built as module
  ARM: OMAP2+: gpmc: fix: DT NAND child nodes not probed when MTD_NAND is built as module
  ARM: dts: omap3-gta04: Fix mmc1 properties.
  ARM: dts: omap3-gta04: Fix 'aux' gpio key flags.
  ARM: OMAP2+: add missing ARCH_HAS_OPP
  ...

Pull regulator fixes from Mark Brown:
 "Mostly unexciting driver fixes, plus one fix to lower the severity of
  the log message when we don't use an optional regulator - the fixes
  for ACPI system made this come up more often and it was correctly
  observed that it was causing undue concern for users"

* tag 'regulator-v3.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: max14577: Fix invalid return value on DT parse success
  regulator: core: Change dummy supplies error message to a warning
  regulator: s5m8767: Add missing of_node_put
  regulator: s5m8767: Use of_get_child_by_name
  regulator: da9063: Bug fix when setting max voltage on LDOs 5-11

Pull timer fix from Thomas Gleixner:
 "Serialize the registration of a new sched_clock in the currently ARM
  only generic sched_clock facilty to avoid sched_clock havoc"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched_clock: Prevent callers from seeing half-updated data

Pull x86 fixes from Thomas Gleixner:

 - a bugfix which prevents a divide by 0 panic when the newly introduced
   try_msr_calibrate_tsc() fails

 - enablement of the Baytrail platform to utilize the newfangled msr
   based calibration

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: tsc: Add missing Baytrail frequency to the table
  x86, tsc: Fallback to normal calibration if fast MSR calibration fails

Pull irq fixes from Thomas Gleixner:
 "Another four fixlets to tame the ARM orion irq chip"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip: orion: Fix getting generic chip pointer.
  irqchip: orion: clear stale interrupts in irq_startup
  irqchip: orion: use handle_edge_irq on bridge irqs
  irqchip: orion: clear bridge cause register on init

Pull USB fixes from Greg KH:
 "Here are a number of USB fixes for reported issues for 3.14-rc4

  The majority of these are for USB gadget, phy, and musb driver issues.
  And there's a few new device ids thrown in for good measure"

* tag 'usb-3.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: chipidea: need to mask when writting endptflush and endptprime
  usb: musb: correct use of schedule_delayed_work()
  usb: phy: msm: fix compilation errors when !CONFIG_PM_SLEEP
  usb: gadget: fix NULL pointer dereference
  usb: gadget: printer: using gadget_is_otg to check otg support at runtime
  phy: let phy_provider_register be the last step in registering PHY
  phy-core: Don't allow building phy-core as a module
  phy-core: Don't propagate -ENOSUPP from phy_pm_runtime_get_sync to caller
  phy-core: phy_get: Leave error logging to the caller
  phy,phy-bcm-kona-usb2.c: Add dependency on HAS_IOMEM
  usb: musb: correct use of schedule_delayed_work()
  usb: musb: do not sleep in atomic context
  USB: serial: option: blacklist interface 4 for Cinterion PHS8 and PXS8
  USB: EHCI: add delay during suspend to prevent erroneous wakeups
  usb: gadget: bcm63xx_udc: fix build failure on DMA channel code
  usb: musb: do not sleep in atomic context
  usb: gadget: s3c2410_udc: Fix build error
  usb: musb: core: Fix remote-wakeup resume
  usb: musb: host: Fix SuperSpeed hub enumeration
  usb: musb: fix obex in g_nokia.ko causing kernel panic

Pull TTY revert from Greg KH:
 "Here is a single commit, a revert of a sysfs file change that ended up
  breaking a userspace tool"

* tag 'tty-3.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  Revert "tty: Set correct tty name in 'active' sysfs attribute"

Pull staging tree fix from Greg KH:
 "Here is a single android driver fix for 3.14-rc4 that fixes a reported
  problem in the binder driver"

* tag 'staging-3.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: binder: Fix death notifications

Pull char/misc fix from Greg KH:
 "Here is a single commit, to fix a reported problem in the mei driver"

* tag 'char-misc-3.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  mei: set client's read_cb to NULL when flow control fails

Add myself as an additional maintainer for the Broadcom mobile
SoCs.

Signed-off-by: Matt Porter <mporter@linaro.org>
Acked-by: Christian Daudt <bcm@fixthebug.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

Merge remote-tracking branches 'regulator/fix/da9063', 'regulator/fix/max14577' and 'regulator/fix/s5m8767' into regulator-linus

This reverts commit d8a5dc30

.

This breaks plymouth installs, either because plymouth is using the file
"incorrectly" or because the patch is incorrect.  Either way, this needs
to be reverted until it is all figured out.

Reported-by: Josh Boyer <jwboyer@fedoraproject.org>
Reported-by: Ray Strode <halfline@gmail.com>
Cc: Lennart Poettering <lennart@poettering.net>
Cc: Kay Sievers <kay@vrfy.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: David Herrmann <dh.herrmann@gmail.com>
Cc: Werner Fink <werner@suse.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Pull scheduler fixes from Ingo Molnar:
 "Misc fixlets: a fair number of them resulting from the new
  SCHED_DEADLINE code"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/deadline: Remove useless dl_nr_total
  sched/deadline: Test for CPU's presence explicitly
  sched: Add 'flags' argument to sched_{set,get}attr() syscalls
  sched: Fix information leak in sys_sched_getattr()
  sched,numa: add cond_resched to task_numa_work
  sched/core: Make dl_b->lock IRQ safe
  sched/core: Fix sched_rt_global_validate
  sched/deadline: Fix overflow to handle period==0 and deadline!=0
  sched/deadline: Fix bad accounting of nr_running

Pull perf fixes from Ingo Molnar:
 "Misc fixlets from all around the place"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/uncore: Fix IVT/SNB-EP uncore CBOX NID filter table
  perf/x86: Correctly use FEATURE_PDCM
  perf, nmi: Fix unknown NMI warning
  perf trace: Fix ioctl 'request' beautifier build problems on !(i386 || x86_64) arches
  perf trace: Add fallback definition of EFD_SEMAPHORE
  perf list: Fix checking for supported events on older kernels
  perf tools: Handle PERF_RECORD_HEADER_EVENT_TYPE properly
  perf probe: Do not add offset twice to uprobe address
  perf/x86: Fix Userspace RDPMC switch
  perf/x86/intel/p6: Add userspace RDPMC quirk for PPro

Pull hwmon fix from Guenter Roeck:
 "Fix writing the minimum temperature in max1668 driver"

* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (max1668) Fix writing the minimum temperature

Pull xfs fixes from Dave Chinner:
 "This is the first pull request I've had to do for you, so I'm still
  sorting things out.  The reason I'm sending this and not Ben should be
  obvious from the first commit below - SGI has stepped down from the
  XFS maintainership role.  As such, I'd like to take another
  opportunity to thank them for their many years of effort maintaining
  XFS and supporting the XFS community that they developed from the
  ground up.

  So I haven't had time to work things like signed tags into my
  workflows yet, so this is just a repo branch I'm asking you to pull
  from.  And yes, I named the branch -rc4 because I wanted the fixes in
  rc4, not because the branch was for merging into -rc3.  Probably not
  right, either.

  Anyway, I should have everything sorted out by the time the next merge
  window comes around.  If there's anything that you don't like in the
  pull req, feel free to flame me unmercifully.

  The changes are fixes for recent regressions and important thinkos in
  verification code:

        - a log vector buffer alignment issue on ia32
        - timestamps on truncate got mangled
        - primary superblock CRC validation fixes and error message
          sanitisation"

* 'xfs-fixes-for-3.14-rc4' of git://oss.sgi.com/xfs/xfs:
  xfs: limit superblock corruption errors to actual corruption
  xfs: skip verification on initial "guess" superblock read
  MAINTAINERS: SGI no longer maintaining XFS
  xfs: xfs_sb_read_verify() doesn't flag bad crcs on primary sb
  xfs: ensure correct log item buffer alignment
  xfs: ensure correct timestamp updates from truncate