linux.git/arch/arm/plat-versatile, branch v3.13

ARM: vexpress: add big endian support

2013-10-19T19:46:34+00:00

Add support for the versatile express systems to boot big-endian.

Signed-off-by: Ben Dooks

arm: delete cpuinit/CPUINIT usage from all ARM users

2013-07-14T23:36:52+00:00

The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications.  For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.

After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out.  Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.

Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
and are flagged as __cpuinit  -- so if we remove the __cpuinit from
the arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
related content into no-ops as early as possible, since that will get
rid of these warnings.  In any case, they are temporary and harmless.

This removes all the ARM uses of the __cpuinit macros from C code,
and all __CPUINIT from assembly code.  It also had two ".previous"
section statements that were paired off against __CPUINIT
(aka .section ".cpuinit.text") that also get removed here.

[1] https://lkml.org/lkml/2013/5/20/589

Cc: Russell King 
Cc: Will Deacon 
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Paul Gortmaker

Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-07-06T21:09:38+00:00

Pull timer core updates from Thomas Gleixner:
 "The timer changes contain:

   - posix timer code consolidation and fixes for odd corner cases

   - sched_clock implementation moved from ARM to core code to avoid
     duplication by other architectures

   - alarm timer updates

   - clocksource and clockevents unregistration facilities

   - clocksource/events support for new hardware

   - precise nanoseconds RTC readout (Xen feature)

   - generic support for Xen suspend/resume oddities

   - the usual lot of fixes and cleanups all over the place

  The parts which touch other areas (ARM/XEN) have been coordinated with
  the relevant maintainers.  Though this results in an handful of
  trivial to solve merge conflicts, which we preferred over nasty cross
  tree merge dependencies.

  The patches which have been committed in the last few days are bug
  fixes plus the posix timer lot.  The latter was in akpms queue and
  next for quite some time; they just got forgotten and Frederic
  collected them last minute."

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (59 commits)
  hrtimer: Remove unused variable
  hrtimers: Move SMP function call to thread context
  clocksource: Reselect clocksource when watchdog validated high-res capability
  posix-cpu-timers: don't account cpu timer after stopped thread runtime accounting
  posix_timers: fix racy timer delta caching on task exit
  posix-timers: correctly get dying task time sample in posix_cpu_timer_schedule()
  selftests: add basic posix timers selftests
  posix_cpu_timers: consolidate expired timers check
  posix_cpu_timers: consolidate timer list cleanups
  posix_cpu_timer: consolidate expiry time type
  tick: Sanitize broadcast control logic
  tick: Prevent uncontrolled switch to oneshot mode
  tick: Make oneshot broadcast robust vs. CPU offlining
  x86: xen: Sync the CMOS RTC as well as the Xen wallclock
  x86: xen: Sync the wallclock when the system time is set
  timekeeping: Indicate that clock was set in the pvclock gtod notifier
  timekeeping: Pass flags instead of multiple bools to timekeeping_update()
  xen: Remove clock_was_set() call in the resume path
  hrtimers: Support resuming with two or more CPUs online (but stopped)
  timer: Fix jiffies wrap behavior of round_jiffies_common()
  ...

ARM: 7766/1: versatile: don't mark pen as __INIT

2013-06-24T14:23:56+00:00

When booting fewer cores than are physically present on a versatile
platform (e.g. when passing maxcpus=N on the command line), some
secondary cores may remain in the holding pen, which is marked __INIT,
as each CPU's gic cpumask is initialised to 0xff, and thus an IPI to any
CPU will wake up *all* secondaries. This behaviour is crucial to the GIC
cpumask self-discovery. Late in the boot process, the memory comprising
the holding pen will be released to the kernel for more general use, and
may be overwritten with arbitrary data, which can cause the held
secondaries to start behaving unpredictably. This can lead to all manner
of odd behaviour from the kernel.

As preventing cpus from entering the pen would require invasive changes
to the GIC driver and to existing dts used in the wild, we instead
remove the __INIT marker from the pen, keeping it around and leaving the
unused secondary CPUs dormant.

Link: http://lists.infradead.org/pipermail/linux-arm-kernel/2013-June/175039.html

Signed-off-by: Mark Rutland 
Acked-by: Pawel Moll 
Acked-by: Nicolas Pitre 
Cc: Lorenzo Pieralisi 
Signed-off-by: Russell King

sched_clock: Make ARM's sched_clock generic for all architectures

2013-06-12T21:02:13+00:00

Nothing about the sched_clock implementation in the ARM port is
specific to the architecture. Generalize the code so that other
architectures can use it by selecting GENERIC_SCHED_CLOCK.

Signed-off-by: Stephen Boyd 
[jstultz: Merge minor collisions with other patches in my tree]
Signed-off-by: John Stultz

irqchip: gic: Perform the gic_secondary_init() call via CPU notifier

2013-03-26T16:12:02+00:00

All the calls to gic_secondary_init() pass 0 as the first argument.
Since this function is called on each CPU when starting, it can be done
in a platform-independent way via a CPU notifier registered by the GIC
code.

Signed-off-by: Catalin Marinas 
Acked-by: Stephen Warren 
Acked-by: Viresh Kumar 
Acked-by: Santosh Shilimkar 
Acked-by: Rob Herring 
Acked-by: Simon Horman 
Tested-by: Simon Horman 
Acked-by: Srinidhi Kasagar 
Tested-by: Dinh Nguyen 
Acked-by: Nicolas Pitre 
Tested-by: Marc Zyngier 
Cc: Russell King 
Cc: Thomas Gleixner 
Cc: Kukjin Kim 
Cc: Sascha Hauer 
Cc: David Brown 
Cc: Bryan Huntsman 
Cc: Tony Lindgren 
Cc: Magnus Damm 
Cc: Shiraz Hashim 
Cc: Linus Walleij 
Cc: Will Deacon 
Cc: Kukjin Kim 
Cc: Barry Song

Merge tag 'v3.8-rc5' into next/cleanup

2013-01-28T06:07:20+00:00

Linux 3.8-rc5

Signed-off-by: Olof Johansson

ARM: vexpress: extend the MPIDR range used for pen release check

2013-01-24T12:19:23+00:00

In ARM multi-cluster systems the MPIDR affinity level 0 cannot be used as a
single cpu identifier, affinity levels 1 and 2 must be taken into account as
well.
This patch extends the MPIDR usage to affinity levels 1 and 2 in versatile
secondary cores start up code in order to compare the passed pen_release
value with the full-blown affinity mask.

Signed-off-by: Lorenzo Pieralisi 
Signed-off-by: Liviu Dudau 
Acked-by: Nicolas Pitre 
Signed-off-by: Pawel Moll

irqchip: Move ARM gic.h to include/linux/irqchip/arm-gic.h

2013-01-12T16:47:32+00:00

Now that we have GIC moved to drivers/irqchip and all GIC DT init for
platforms using irqchip_init, move gic.h and update the remaining
includes.

Signed-off-by: Rob Herring 
Cc: Thomas Gleixner 
Cc: Russell King 
Cc: Anton Vorontsov 
Cc: Kukjin Kim 
Cc: Sascha Hauer 
Cc: David Brown 
Cc: Daniel Walker 
Cc: Bryan Huntsman 
Cc: Tony Lindgren 
Cc: Paul Mundt 
Cc: Magnus Damm 
Cc: Viresh Kumar 
Cc: Shiraz Hashim 
Cc: Stephen Warren 
Cc: Srinidhi Kasagar 
Cc: Linus Walleij 
Cc: Samuel Ortiz

ARM: GIC: remove direct use of gic_raise_softirq

2013-01-10T17:45:43+00:00

In preparation of moving gic code to drivers/irqchip, remove the direct
platform dependencies on gic_raise_softirq. Move the setup of
smp_cross_call into the gic code and use arch_send_wakeup_ipi_mask
function to trigger wake-up IPIs.

Signed-off-by: Rob Herring 
Cc: Russell King 
Cc: Kukjin Kim 
Cc: Sascha Hauer 
Cc: David Brown 
Cc: Daniel Walker 
Cc: Bryan Huntsman 
Acked-by: Tony Lindgren 
Acked-by: Santosh Shilimkar 
Cc: Paul Mundt 
Cc: Magnus Damm 
Acked-by: Viresh Kumar 
Cc: Shiraz Hashim 
Acked-by: Stephen Warren 
Cc: Srinidhi Kasagar 
Cc: Linus Walleij 
Acked-by: Olof Johansson