Change counter inheritance from a 'push' to a 'pull' model: instead of
child tasks pushing their final counts to the parent, reuse the wait4
infrastructure to pull counters as child tasks are exit-processed,
much like how cutime/cstime is collected.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: fix per task clock counter precision
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: rename field names

Shorten them.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: clean up
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Enumerate fixed-mode PMCs based on CPUID, and feed that into the
perfcounter code.

Does not use fixed-mode PMCs yet.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: refactor the x86 code for fixed-mode PMCs

Extend the data structures and rename the existing facilities
to allow for a 'generic' versus 'fixed' counter distinction.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: rename include file

We'll be providing an asm/perf_counter.h to the generic perfcounter code,
so use the already existing x86 file for this purpose and rename it.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: schedule in groups atomically

If there are multiple groups in a task, make sure they are scheduled
in and out atomically.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: remove debug checks
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: cleanup, avoid sparse warnings, reduce kernel size a bit

Fixes these sparse warnings:
 arch/x86/kernel/cpu/perf_counter.c:44:11: warning: symbol 'intel_perfmon_event_map' was not declared. Should it be static?
 arch/x86/kernel/cpu/perf_counter.c:54:11: warning: symbol 'max_intel_perfmon_events' was not declared. Should it be static?
Signed-off-by: NJaswinder Singh <jaswinder@infradead.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: implement default-off counters

Make sure that counters that are created with counter.hw_event.disabled=1,
get created in disabled state.

They can be enabled via:

        prctl(PR_TASK_PERF_COUNTERS_ENABLE);
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Pavel Machek pointed out that performance counters should be flushed
when crossing protection domains on setuid execution.
Reported-by: NPavel Machek <pavel@suse.cz>
Acked-by: NPavel Machek <pavel@suse.cz>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

If counters are exiting via do_exit() not via filp close, then
the CPU context needs to be released - otherwise future percpu
counter creations might fail.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Fix non-working NMI sampling in certain bootup scenarios.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Make perf_max_counters default to at least 1 - this allows the sw
counters to be used.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Do not write MSR_CORE_PERF_GLOBAL_CTRL on CPUs where it does not exist.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: add new feature, new sw counter

Add a counter that counts the number of pagefaults a task
is experiencing.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: add new feature, new sw counter

Add a counter that counts the number of cross-CPU migrations a
task is suffering.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: add new feature, new sw counter

Add a counter that counts the number of context-switches a task
is doing.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: bugfix

Update the task clock counter to the new math.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: implement new performance feature

Counter inheritance can be used to run performance counters in a workload,
transparently - and pipe back the counter results to the parent counter.

Inheritance for performance counters works the following way: when creating
a counter it can be marked with the .inherit=1 flag. Such counters are then
'inherited' by all child tasks (be they fork()-ed or clone()-ed). These
counters get inherited through exec() boundaries as well (except through
setuid boundaries).

The counter values get added back to the parent counter(s) when the child
task(s) exit - much like stime/utime statistics are gathered. So inherited
counters are ideal to gather summary statistics about an application's
behavior via shell commands, without having to modify that application.

The timec.c command utilizes counter inheritance:

  http://redhat.com/~mingo/perfcounters/timec.c

Sample output:

   $ ./timec -e 1 -e 3 -e 5 ls -lR /usr/include/ >/dev/null

   Performance counter stats for 'ls':

           163516953 instructions
                2295 cache-misses
             2855182 branch-misses
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: restructure code

Change counter math from absolute values to clear delta logic.

We try to extract elapsed deltas from the raw hw counter - and put
that into the generic counter.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: new API

Implement the atomic64_t APIs on 32-bit as well. Will be used by
the performance counters code.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx:
  powerpc/40x: Add proper BOOTCFLAGS for cuboot-acadia

* 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6:
  i2c-highlander: Trivial endian casting fixes
  i2c-pmcmsp: Fix endianness misannotation

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  Commands needing to be retried require a complete re-initialization.

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  MIPS: IP32: Update defconfig
  MIPS: Add missing calls to plat_unmap_dma_mem.
  MIPS: Kconfig: Fix the arch-specific header path
  MIPS: Use EI/DI for MIPS R2.

For the console, there is a 1:1 mapping of glyphs which cannot be found
in the current font.  This seems to be meant as a kind of 'emergency
fallback' for fonts without unicode mapping which otherwise would
display nothing readable on the screen.

At the moment it affects all chars for which no substitution character
is defined.  In particular this means that for all chars (>= 128) where
there is no iso88591-1/unicode character (e.g.  control character area)
you'll get the very strange 1:1 mapping of the (cp437) graphics card
glyphs.

I'm pretty sure that the 1:1 mapping should only affect strict ASCII
code characters, i.e.  chars < 128.

The patch limits the mapping as it probably was meant anyway.
Signed-off-by: NIngo Brueckl <ib@wupperonline.de>
Acked-by: NH. Peter Anvin <hpa@zytor.com>
Cc: Egmont Koblinger <egmont@uhulinux.hu>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

There is a major bug in the cp437 to unicode translation table.  Char
0x7c is mapped to U+00a5 which is the Yen sign and wrong.  The right
mapping is U+00a6 (broken bar).

Furthermore, a mapping for U+00b4 (a widely used character) is missing
even though easily possible.

The patch fixes these, as well as it provides a few other useful
mappings.

The changes are as follows:

  0x0f (enhancement) enables a sort of currency symbol
  0x27 (bug) enables a sort of acute accent which is a widely used character
  0x44 (enhancement) enables a sort of icelandic capital letter eth
  0x7c (major bug) corrects mapping
  0xeb (enhancement) enables a sort of icelandic small letter eth
  0xee (enhancement) enables a sort of math 'element of'
Signed-off-by: NIngo Brueckl <ib@wupperonline.de>
Acked-by: NH. Peter Anvin <hpa@zytor.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

dma_free_noncoherent() and dma_free_coherent() are missing calls to
plat_unmap_dma_mem().  This patch adds them.
Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

The header path in the help text for the RUNTIME_DEBUG config option is
obsolete and needs to be updated to match the new location of
architecture-specific header files. While at it, fix the spelling mistake.
Signed-off-by: NDmitri Vorobiev <dmitri.vorobiev@movial.fi>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

For MIPS R2, use the EI and DI instructions to enable and disable
interrupts.
Signed-off-by: NTomaso Paoletti <tpaoletti@caviumnetworks.com>
Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

The test-unit-ready portion of this patch was causing boots to fail on
my test machine (as in http://lkml.org/lkml/2008/12/5/161). With this
patch in place, the system is booting reliably.

Mike Anderson found the same problem in the hp_hw_start_stop code,
and I applied the same solution in cdrom_read_cdda_bpc.
Signed-off-by: NAlan D. Brunelle <alan.brunelle@hp.com>
Cc: Mike Anderson <andmike@linux.vnet.ibm.com>
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

( with manual semantic merge of arch/x86/kernel/cpu/perf_counter.c )

Impact: cleanup

Introduce inc_irq_stat() macro and unify irq_stat accounting code.
Signed-off-by: NHiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: update docs
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: cleanup

Introduce a proper enum for the 3 states of a counter:

	PERF_COUNTER_STATE_OFF		= -1
	PERF_COUNTER_STATE_INACTIVE	=  0
	PERF_COUNTER_STATE_ACTIVE	=  1

and rename counter->active to counter->state and propagate the
changes everywhere.
Signed-off-by: NIngo Molnar <mingo@elte.hu>