jf: Cleanup

Change-Id: I0580ee57d9b9a3392388513f09f085dfbdb2d1f5
msm: cpufreq: Add support for CPU clocks and msm-cpufreq device

Add support for using clock APIs to do CPU/L2 frequency scaling. When clock
APIs are used to control CPU/L2 frequencies, the cpufreq driver must handle
the CPU -> L2 -> DDR bandwidth voting. Use a msm-cpufreq device to provide
the per SoC list of CPU frequencies and their L2/DDR bandwidth mapping
information.

If CPU/L2 clocks are not available, fallback to using acpuclock APIs. We
eventually want to remove the use of non-standard acpuclock APIs.

Change-Id: I2c4e2c3967d73e8cdbd9833f3cb36f3d75e27b4a
Signed-off-by: Saravana Kannan <skannan@codeaurora.org>

Conflicts:
	arch/arm/mach-msm/cpufreq.c
msm: cpufreq: Update frequency index

A deprecated api can be used to limit the minimum and maximum cpu speeds.
Another driver temporarily needs to switch back to this api, instead of
using the new version. Make this api functional again by ensuring a stale
value is updated properly.

Change-Id: Ia63772e43ec534cf2bb58e7627a87315dae5d891
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>
msm: pm: avoid array overrun for msm_pm_sleep_modes

The array is not defined for the maximum possible size.
So it is possible that the array may overrun when it is
dereferenced using MSM_PM_MODE macro.

Add a dummy entry to make sure array is of max size.

Change-Id: I5783b0aa6c8295c5c5aabcb498700c6af1a3eba5
Signed-off-by: Venkat Devarasetty <vdevaras@codeaurora.org>
ARM: mm: Remove SW emulation for ARM domain manager

8x50 is no longer supported in the msm-3.4 kernel, so remove this
feature.

Change-Id: I2156ef22cca82d3cce6a7d39e366b93cab32f811
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
msm: perf: add debug patch logging framework

Provide a mechanism to track which msm perf patches
are present in a kernel. Some kernel branches do
not include all patches which causes problems trying
to debug perf issues. This framework provides a way
to keep track of which patches have been included
in a build.

Change-Id: Ib8ef311454564c4609d94decd93e039c80104275
Signed-off-by: Neil Leeder <nleeder@codeaurora.org>
Perf: Restore counter after powercollapse for generic ARM PMU's

The MSM SoC's which have ARM's CPU's can power collapse. Ensure
the CPU side PMU's correctly restore the counters after coming
out of power collapse.

Change-Id: I544a1dd8ced26f726ba115d14867d9e34c2a7944
Signed-off-by: Ashwin Chaugule <ashwinc@codeaurora.org>
Perf: Make L1 PMU IRQ name target independent

Remove target name from IRQ string, since the percpu IRQ API
is shared with all Qcomm targets.

Change-Id: Id0e7d9267654b373e9360806900259e00bf5a0ab
Signed-off-by: Ashwin Chaugule <ashwinc@codeaurora.org>
Perf: Let platforms decide IRQ request methods.

This is in preparation for adding support for the unicore A5
and dualcore A5, both of which have the same MIDR value.

Instead of adding extra parsing to the ARM generic perf_event file,
this patch moves it to the 'mach' directory where targets types
can be detected in an implementation specific manner.

The default behavior is maintained for all other ARM targets.

Change-Id: I041937273dbbd0fa4c602cf89a2e0fee7f73342b
Signed-off-by: Ashwin Chaugule <ashwinc@codeaurora.org>
Perf: Toggle PMU IRQ when CPU's are hotplugged

When a CPU is hotplugged out while a perf session
is active, disarm the IRQ when the CPU is preparing
to die. This ensures that perf doesn't lock up when
it tries to free the irq of a hotplugged CPU.
Similarly, when a CPU comes online during a perf session
enable the IRQ so that perf doesn't try to disable
an unarmed IRQ when it finishes.

Change-Id: Ic4e412e5f1effae0db34a3e4b5e7e5c65faed2a0
Signed-off-by: Ashwin Chaugule <ashwinc@codeaurora.org>
Perf: Correct irq for CPU hotplug detection

The platform data was requesting the wrong number,
it should request the first perf irq item.

Change-Id: I4a25b4704ed9e76172c6b0d4ca4b28a3286ab2ad
Signed-off-by: Neil Leeder <nleeder@codeaurora.org>
Revert "Revert "ARM: 7169/1: topdown mmap support""

This reverts commit f27e4f0e730b99ca4dabed0b408d96dbf73a8fac.

An alternate fix has been proposed where userspace programs
set ADDR_COMPAT_LAYOUT. Bring back the topdown mmap support.

Change-Id: Ibd6e74d406db3a5ddb609e2d2a7a6e9dc2080eca
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>

Conflicts:
	arch/arm/include/asm/pgtable.h
	arch/arm/include/asm/processor.h
ARM: fix warning caused by wrongly typed arm_dma_limit

arch/arm/mm/init.c: In function 'arm_memblock_init':
arch/arm/mm/init.c:380: warning: comparison of distinct pointer types lacks a cast

by fixing the typecast in its definition when DMA_ZONE is disabled.
This was missed in 4986e5c7c (ARM: mm: fix type of the arm_dma_limit
global variable).

Change-Id: Id076f2bebe307609265afdd4229181d2004c5f9c
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>
ARM: Drop VCM framework

This framework wasn't accepted upstream and is not used. Drop it.

Change-Id: Ieb381a679873cbfb4baf245a5bcb8df1c730d964
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
arm: common: move cpaccess sysfs node

cpaccess uses sysdev which is being deprecated.
Move the cpaccess node out of the /sys/devices/system
directory to /sys/devices. Temporarily leave the original
sysdev node for migration purposes, until userspace
applications can be moved to the new node.

Change-Id: Iacc776968f892fc6c6463764e576d987e4371716
Signed-off-by: Neil Leeder <nleeder@codeaurora.org>
perf: Remove deprecated code

Change-Id: I30b874b35d6e75be3b05245f689f456fdb3cd70c
sched: Unthrottle rt runqueues in __disable_runtime()

migrate_tasks() uses _pick_next_task_rt() to get tasks from the
real-time runqueues to be migrated. When rt_rq is throttled
_pick_next_task_rt() won't return anything, in which case
migrate_tasks() can't move all threads over and gets stuck in an
infinite loop.

Instead unthrottle rt runqueues before migrating tasks.

Additionally: move unthrottle_offline_cfs_rqs() to rq_offline_fair()

Change-Id: If8a4a399f1a14b7f4789c1b205dcfadbde555214
Signed-off-by: Peter Boonstoppel <pboonstoppel@nvidia.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Turner <pjt@google.com>
Link: http://lkml.kernel.org/r/5FBF8E85CA34454794F0F7ECBA79798F379D3648B7@HQMAIL04.nvidia.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Git-commit: a4c96ae319b8047f62dedbe1eac79e321c185749
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
watchdog: Fix warning caused by use of smp_processor_id()

watchdog driver creates per-cpu kernel threads that are bound to
separate cpus. Use of smp_processor_id() by such threads in
__touch_watchdog() is perfectly fine, as they are generally pinned to
the cpu on which they are running.

During cpu offline event, however, affinity for the watchdog thread
bound to dying cpu is broken before it is killed. There is a small
time window between affinity broken and thread dying in which thread
can run on a cpu with its affinity not set to that cpu exclusively.
This will trigger a warning from use of smp_processor_id(), which is
harmless in this case as it will provide the required heartbeat on cpu
where it is running and moreover that thread will be shortly killed.

Mute the harmless warning by use of raw_smp_processor_id() in
__touch_watchdog(). This seems less intrusive fix than killing threads
in CPU_DOWN_PREPARE event handler.

Change-Id: I7fa22ff529aeea0ec3d5610cfec87aea92cf95a0
CRs-Fixed: 517188
Signed-off-by: Srivatsa Vaddagiri <vatsa@codeaurora.org>
tracing/sched: Add trace events to track cpu hotplug.

Add ftrace event trace_sched_cpu_hotplug to track cpu
hot-add and hot-remove events.

This is useful in a variety of power, performance and
debug analysis scenarios.

Change-Id: I5d202c7a229ffacc3aafb7cf9afee0b0ee7b0931
Signed-off-by: Arun Bharadwaj <abharadw@codeaurora.org>
AIO: Don't plug the I/O queue in do_io_submit()
Asynchronous I/O latency to a solid-state disk greatly increased
between the 2.6.32 and 3.0 kernels. By removing the plug from
do_io_submit(), we observed a 34% improvement in the I/O latency.

Unfortunately, at this level, we don't know if the request is to
a rotating disk or not.

Change-Id: I7101df956473ed9fd5dcff18e473dd93b688a5c1
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Cc: linux-aio@kvack.org
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jeff Moyer <jmoyer@redhat.com>