linux-toradex.git/arch/arm/oprofile, branch v4.4.52

Merge branch 'devel-stable' into for-next

2014-08-05T09:27:25+00:00

Conflicts:
	arch/arm/kernel/perf_event_cpu.c

ARM: 8075/1: oprofile: Use of arm_get_current_stackframe

2014-07-18T11:29:20+00:00

Use the newly introduced API so that FP is correctly referenced from
either R7/R11 based on whether we are running in THUMB2 mode or not.

Signed-off-by: Nikolay Borisov 
Acked-by: Will Deacon 
Acked-by: Robert Richter 
Signed-off-by: Russell King

arm: perf: clean up PMU names

2014-07-02T14:48:25+00:00

The perf userspace tools can't handle dashes or spaces in PMU names,
which conflicts with the current naming scheme in the arm perf backend.
This prevents these PMUs from being accessed by name from the perf
tools. Additionally the ARMv6 pmus are named "v6", which does not fully
distinguish them in the sys/bus/event_source namespace.

This patch renames the PMUs consistently to a lower case form with
underscores, e.g. "armv6_1176", "armv7_cortex_a9". This is both readily
accepted by today's perf tool, and far easier to type than the
(apparently unused) convention in use previously. The OProfile name
conversion code is updated to handle this.

Due to a copy-paste error involving two "xscale1" entries, "xscale2" has
never been matched by the name OProfile name mapping. While we're
updating names, this is corrected.

Acked-by: Will Deacon 
Tested-by: Christopher Covington 
Signed-off-by: Mark Rutland 
[sachin: fixed missing semicolons in armv6 backend]
Signed-off-by: Sachin Kamat 
Signed-off-by: Will Deacon

ARM: 7448/1: perf: remove arm_perf_pmu_ids global enumeration

2012-07-09T16:41:10+00:00

In order to provide PMU name strings compatible with the OProfile
user ABI, an enumeration of all PMUs is currently used by perf to
identify each PMU uniquely. Unfortunately, this does not scale well
in the presence of multiple PMUs and creates a single, global namespace
across all PMUs in the system.

This patch removes the enumeration and instead uses the name string
for the PMU to map onto the OProfile variant. perf_pmu_name is
implemented for CPU PMUs, which is all that OProfile cares about anyway.

Signed-off-by: Will Deacon 
Signed-off-by: Russell King

oprofile, arm/sh: Fix oprofile_arch_exit() linkage issue

2011-12-23T10:58:34+00:00

This change fixes a linking problem, which happens if oprofile
is selected to be compiled as built-in:

  `oprofile_arch_exit' referenced in section `.init.text' of
  arch/arm/oprofile/built-in.o: defined in discarded section
  `.exit.text' of arch/arm/oprofile/built-in.o

The problem is appeared after commit 87121ca504, which
introduced oprofile_arch_exit() calls from __init function. Note
that the aforementioned commit has been backported to stable
branches, and the problem is known to be reproduced at least
with 3.0.13 and 3.1.5 kernels.

Signed-off-by: Vladimir Zapolskiy 
Signed-off-by: Robert Richter 
Cc: Will Deacon 
Cc: oprofile-list 
Cc: 
Link: http://lkml.kernel.org/r/20111222151540.GB16765@erda.amd.com
Signed-off-by: Ingo Molnar

Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2011-02-15T18:18:48+00:00

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Fix text_poke_smp_batch() deadlock
  perf tools: Fix thread_map event synthesizing in top and record
  watchdog, nmi: Lower the severity of error messages
  ARM: oprofile: Fix backtraces in timer mode
  oprofile: Fix usage of CONFIG_HW_PERF_EVENTS for oprofile_perf_init and friends

ARM: 6654/1: perf/oprofile: fix off-by-one in stack check

2011-02-10T15:29:03+00:00

Since tail is the previous fp - 1, we need to compare the new fp with tail + 1
to ensure that we don't end up passing in the same tail again, in order to
avoid a potential infinite loop in the perf interrupt handler (which has been
observed to occur).  A similar fix seems to be needed in the OProfile code.

Acked-by: Will Deacon 
Signed-off-by: Rabin Vincent 
Signed-off-by: Russell King

ARM: oprofile: Fix backtraces in timer mode

2011-01-26T18:21:28+00:00

Always allow backtraces when using oprofile on ARM, even if a PMU
isn't present. Restores functionality originally introduced in commit
1b7b56982fdcd9d85effd76f3928cf5d6eb26155 ("oprofile: Always allow
backtraces on ARM") by Richard Purdie.

It is not that obvious, but there is now only one oprofile_arch_init()
function. So the .backtrace callback is available also in timer mode.

Implemented by removing code and using stubs for oprofile_perf_{init,
exit} provided by . This allows cleaning of other
architecture specific implementations too.

Cc: stable@kernel.org # 37.x
Signed-off-by: Ari Kauppi 
Acked-by: Will Deacon 
Signed-off-by: Robert Richter

oprofile: Abstract the perf-events backend

2010-10-11T15:46:16+00:00

Move the perf-events backend from arch/arm/oprofile into
drivers/oprofile so that the code can be shared between architectures.

This allows each architecture to maintain only a single copy of the PMU
accessor functions instead of one for both perf and OProfile. It also
becomes possible for other architectures to delete much of their
OProfile code in favour of the common code now available in
drivers/oprofile/oprofile_perf.c.

Signed-off-by: Matt Fleming 
Tested-by: Will Deacon 
Signed-off-by: Robert Richter

ARM: oprofile: Move non-ARM code into separate init/exit

2010-10-11T15:46:15+00:00

In preparation for moving the majority of this oprofile code into an
architecture-neutral place separate the architecture-independent code
into oprofile_perf_init() and oprofile_perf_exit().

Signed-off-by: Matt Fleming 
Tested-by: Will Deacon 
Signed-off-by: Robert Richter