On Cortex-A15 (r0p0..r3p2) the TLBI/DSB are not adequately shooting down
all use of the old entries. This patch implements the erratum workaround
which consists of:

1. Dummy TLBIMVAIS and DSB on the CPU doing the TLBI operation.
2. Send IPI to the CPUs that are running the same mm (and ASID) as the
   one being invalidated (or all the online CPUs for global pages).
3. CPU receiving the IPI executes a DMB and CLREX (part of the exception
   return code already).

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Jason Cooper reports these build errors:
arch/arm/kernel/built-in.o: In function `iwmmxt_do':
/.../arch/arm/kernel/pj4-cp0.c:36: undefined reference to `iwmmxt_task_release'
/.../arch/arm/kernel/pj4-cp0.c:40: undefined reference to `iwmmxt_task_switch'
make: *** [vmlinux] Error 1

This is caused because the PJ4 code explicitly references the iWMMXt
code, but doesn't require it to be built.  Fix this by ensuring that
iWMMXt is always enabled with PJ4.

Reported-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Pull ARM SoC bug fixes from Arnd Bergmann:
 "Things are calming down for arm-soc as well.  This set of bug fixes is
  dominated in size by the at91 platform bug fixes.  Some of them were
  meant to go through the framebuffer tree during the merge window, but
  since the framebuffer maintainer could not be reached, I offered to
  take them here.  The other notable at91 change is the addition of
  pinctrl definitions to fix the NAND controller.

  The rest are mostly simple regression fixes:

   - Our removal of VIRT_TO_BUS conflicted with Stephen Rothwell's
     renaming of the Kconfig symbol.  You will get a trivial merge
     conflict here, we still want to remove it.
   - missing bits for clocks on imx and s5pv210
   - missing header inclusions in mmp and shmobile
   - typos in s5pv210 camera and vt8500 clock support code

  and three trivial fixes for pre-3.8 bugs:

   - an old bogus build warning in the joystick driver
   - a misleading Kconfig description
   - a NULL pointer check on davinci"

* tag 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: fix CONFIG_VIRT_TO_BUS handling
  ARM: i.MX35: enable MAX clock
  ARM: Scorpion is a v7 architecture, not v6
  ARM: mmp: add platform_device head file in gplugd
  input/joystick: use get_cycles on ARM
  [media] s5p-fimc: fix s5pv210 build
  clk: vt8500: Fix "fix device clock divisor calculations"
  ARM: i.MX25: Fix DT compilation
  ARM: at91: fix infinite loop in at91_irq_suspend/resume
  ARM: at91: add gpio suspend/resume support when using pinctrl
  ARM: at91: fix LCD-wiring mode
  atmel_lcdfb: fix 16-bpp modes on older SOCs
  ARM: at91: dt: at91sam9x5: complete NAND pinctrl
  ARM: at91: dt: at91sam9x5: correct NAND pins comments
  ARM: davinci: edma: fix dmaengine induced null pointer dereference on da830
  ARM: shmobile: marzen: Include mmc/host.h
  ARM: EXYNOS: Add #dma-cells for generic dma binding support for PL330
  ARM: S5PV210: Fix PL330 DMA controller clkdev entries

887cbce0 "arch Kconfig: centralise CONFIG_ARCH_NO_VIRT_TO_BUS"
and  4febd95a8 "Select VIRT_TO_BUS directly where needed" from
Stephen Rothwell changed globally how CONFIG_VIRT_TO_BUS is
selected, while my own a5d533ee0 "ARM: disable virt_to_bus/
virt_to_bus almost everywhere" was merged at the same time and
changed which platforms select it on ARM.

The result of this conflict was that we again see CONFIG_VIRT_TO_BUS
on all ARM systems. This patch fixes up the problem and removes
CONFIG_ARCH_NO_VIRT_TO_BUS again on ARM.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>

Scorpion processors have always been v7 CPUs. Fix the Kconfig
text to reflect this.

Reported-by: Stepan Moskovchenko <stepanm@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Pull Xen fixes from Konrad Rzeszutek Wilk:
 - Compile warnings and errors (one on x86, two on ARM)
 - WARNING in xen-pciback
 - Use the acpi_processor_get_performance_info instead of the 'register'
   version

* tag 'stable/for-linus-3.9-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/acpi: remove redundant acpi/acpi_drivers.h include
  xen: arm: mandate EABI and use generic atomic operations.
  acpi: Export the acpi_processor_get_performance_info
  xen/pciback: Don't disable a PCI device that is already disabled.

In commit 887cbce0adea ("arch Kconfig: centralise ARCH_NO_VIRT_TO_BUS")
I introduced the config sybmol HAVE_VIRT_TO_BUS and selected that where
needed.  I am not sure what I was thinking.  Instead, just directly
select VIRT_TO_BUS where it is needed.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mvebu fixes for v3.9 from Jason Cooper <jason@lakedaemon.net>:

The first four patches:

  89c58c1 rtc: rtc-mv: Add support for clk to avoid lockups
  de88747 gpio: mvebu: Add clk support to prevent lockup
  7bf5b40 ARM: kirkwood: fix to retain gbe MAC addresses for DT kernels
  93fff4c ARM: kirkwood: of_serial: fix clock gating by removing clock-frequency

are Cc'd to stable since they were held over from the previous merge window.

The rest are a small collection of fixes and a couple of devicetree conversion
catchups.

* tag 'mvebu_fixes_for_v3.9' of git://git.infradead.org/users/jcooper/linux:
  arm: mach-orion5x: fix typo in compatible string of a .dts file
  arm: mvebu: fix address-cells in mpic DT node
  arm: plat-orion: fix address decoding when > 4GB is used
  arm: mvebu: Reduce reg-io-width with UARTs
  ARM: Dove: add RTC device node
  arm: mvebu: enable the USB ports on Armada 370 Reference Design board
  ARM: dove: drop "select COMMON_CLK_DOVE"
  rtc: rtc-mv: Add support for clk to avoid lockups
  gpio: mvebu: Add clk support to prevent lockup
  ARM: kirkwood: fix to retain gbe MAC addresses for DT kernels
  ARM: kirkwood: of_serial: fix clock gating by removing clock-frequency

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

When building a multiplatform kernel, we could end up with a smaller
number of GPIOs than the one required by the platform the kernel was
running on.

Sort the max GPIO number by descending order so that we always take the
highest number required.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Rob Herring has observed that c81611c4e96f "xen: event channel arrays are
xen_ulong_t and not unsigned long" introduced a compile failure when building
without CONFIG_AEABI:

/tmp/ccJaIZOW.s: Assembler messages:
/tmp/ccJaIZOW.s:831: Error: even register required -- `ldrexd r5,r6,[r4]'

Will Deacon pointed out that this is because OABI does not require even base
registers for 64-bit values. We can avoid this by simply using the existing
atomic64_xchg operation and the same containerof trick as used by the cmpxchg
macros. However since this code is used on memory which is shared with the
hypervisor we require proper atomic instructions and cannot use the generic
atomic64 callbacks (which are based on spinlocks), therefore add a dependency
on !GENERIC_ATOMIC64. Since we already depend on !CPU_V6 there isn't much
downside to this.

While thinking about this we also observed that OABI has different struct
alignment requirements to EABI, which is a problem for hypercall argument
structs which are shared with the hypervisor and which must be in EABI layout.
Since I don't expect people to want to run OABI kernels on Xen depend on
CONFIG_AEABI explicitly too (although it also happens to be enforced by the
!GENERIC_ATOMIC64 requirement too).

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Rob Herring <robherring2@gmail.com>
Acked-by: Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>