linux.git/arch/x86/kernel/cpu/Makefile, branch v2.6.37

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-08-06T17:07:34+00:00

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  um, x86: Cast to (u64 *) inside set_64bit()
  x86-32, asm: Directly access per-cpu GDT
  x86-64, asm: Directly access per-cpu IST
  x86, asm: Merge cmpxchg_486_u64() and cmpxchg8b_emu()
  x86, asm: Move cmpxchg emulation code to arch/x86/lib
  x86, asm: Clean up and simplify 
  x86, asm: Clean up and simplify set_64bit()
  x86: Add memory modify constraints to xchg() and cmpxchg()
  x86-64: Simplify loading initial_gs
  x86: Use symbolic MSR names
  x86: Remove redundant K6 MSRs

x86, asm: Move cmpxchg emulation code to arch/x86/lib

2010-07-28T23:53:49+00:00

Move cmpxchg emulation code from arch/x86/kernel/cpu (which is
otherwise CPU identification) to arch/x86/lib, where other emulation
code lives already.

Signed-off-by: H. Peter Anvin 
LKML-Reference:

x86, cpu: Split addon_cpuid_features.c

2010-07-20T02:02:41+00:00

addon_cpuid_features.c contains exactly two almost completely
unrelated functions, plus has a long and very generic name.  Split it
into two files, scattered.c for the scattered feature flags, and
topology.c for the topology information.

Signed-off-by: H. Peter Anvin 
LKML-Reference:

x86: Detect running on a Microsoft HyperV system

2010-05-07T01:24:15+00:00

This patch integrates HyperV detection within the framework currently
used by VmWare. With this patch, we can avoid having to replicate the
HyperV detection code in each of the Microsoft HyperV drivers.

Reworked and tweaked by Greg K-H to build properly.

Signed-off-by: K. Y. Srinivasan 
LKML-Reference: <20100506190841.GA1605@kroah.com>
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: "H. Peter Anvin" 
Cc: Vadim Rozenfeld 
Cc: Avi Kivity 
Cc: Gleb Natapov 
Cc: Frederic Weisbecker 
Cc: Alexey Dobriyan 
Cc: "K.Prasad" 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Cc: Paul Mackerras 
Cc: Alan Cox 
Cc: Haiyang Zhang 
Cc: Hank Janssen 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: H. Peter Anvin

x86: Remove "x86 CPU features in debugfs" (CONFIG_X86_CPU_DEBUG)

2010-01-24T02:27:47+00:00

CONFIG_X86_CPU_DEBUG, which provides some parsed versions of the x86
CPU configuration via debugfs, has caused boot failures on real
hardware.  The value of this feature has been marginal at best, as all
this information is already available to userspace via generic
interfaces.

Causes crashes that have not been fixed + minimal utility -> remove.

See the referenced LKML thread for more information.

Reported-by: Ozan Çağlayan 
Signed-off-by: H. Peter Anvin 
LKML-Reference: 
Cc: Jaswinder Singh Rajput 
Cc: Linus Torvalds 
Cc: Rafael J. Wysocki 
Cc: Yinghai Lu 
Cc:

perf events: Do not generate function trace entries in perf code

2009-11-23T09:19:20+00:00

Decreases perf overhead when function tracing is enabled,
by about 50%.

Cc: Peter Zijlstra 
Cc: Mike Galbraith 
Cc: Paul Mackerras 
Cc: Arnaldo Carvalho de Melo 
Cc: Frederic Weisbecker 
LKML-Reference: 
Signed-off-by: Ingo Molnar

perf: Do the big rename: Performance Counters -> Performance Events

2009-09-21T12:28:04+00:00

Bye-bye Performance Counters, welcome Performance Events!

In the past few months the perfcounters subsystem has grown out its
initial role of counting hardware events, and has become (and is
becoming) a much broader generic event enumeration, reporting, logging,
monitoring, analysis facility.

Naming its core object 'perf_counter' and naming the subsystem
'perfcounters' has become more and more of a misnomer. With pending
code like hw-breakpoints support the 'counter' name is less and
less appropriate.

All in one, we've decided to rename the subsystem to 'performance
events' and to propagate this rename through all fields, variables
and API names. (in an ABI compatible fashion)

The word 'event' is also a bit shorter than 'counter' - which makes
it slightly more convenient to write/handle as well.

Thanks goes to Stephane Eranian who first observed this misnomer and
suggested a rename.

User-space tooling and ABI compatibility is not affected - this patch
should be function-invariant. (Also, defconfigs were not touched to
keep the size down.)

This patch has been generated via the following script:

  FILES=$(find * -type f | grep -vE 'oprofile|[^K]config')

  sed -i \
    -e 's/PERF_EVENT_/PERF_RECORD_/g' \
    -e 's/PERF_COUNTER/PERF_EVENT/g' \
    -e 's/perf_counter/perf_event/g' \
    -e 's/nb_counters/nb_events/g' \
    -e 's/swcounter/swevent/g' \
    -e 's/tpcounter_event/tp_event/g' \
    $FILES

  for N in $(find . -name perf_counter.[ch]); do
    M=$(echo $N | sed 's/perf_counter/perf_event/g')
    mv $N $M
  done

  FILES=$(find . -name perf_event.*)

  sed -i \
    -e 's/COUNTER_MASK/REG_MASK/g' \
    -e 's/COUNTER/EVENT/g' \
    -e 's/\/event_id/g' \
    -e 's/counter/event/g' \
    -e 's/Counter/Event/g' \
    $FILES

... to keep it as correct as possible. This script can also be
used by anyone who has pending perfcounters patches - it converts
a Linux kernel tree over to the new naming. We tried to time this
change to the point in time where the amount of pending patches
is the smallest: the end of the merge window.

Namespace clashes were fixed up in a preparatory patch - and some
stylistic fallout will be fixed up in a subsequent patch.

( NOTE: 'counters' are still the proper terminology when we deal
  with hardware registers - and these sed scripts are a bit
  over-eager in renaming them. I've undone some of that, but
  in case there's something left where 'counter' would be
  better than 'event' we can undo that on an individual basis
  instead of touching an otherwise nicely automated patch. )

Suggested-by: Stephane Eranian 
Acked-by: Peter Zijlstra 
Acked-by: Paul Mackerras 
Reviewed-by: Arjan van de Ven 
Cc: Mike Galbraith 
Cc: Arnaldo Carvalho de Melo 
Cc: Frederic Weisbecker 
Cc: Steven Rostedt 
Cc: Benjamin Herrenschmidt 
Cc: David Howells 
Cc: Kyle McMartin 
Cc: Martin Schwidefsky 
Cc: "David S. Miller" 
Cc: Thomas Gleixner 
Cc: "H. Peter Anvin" 
Cc: 
LKML-Reference: 
Signed-off-by: Ingo Molnar

x86: sched: Provide arch implementations using aperf/mperf

2009-09-15T14:51:27+00:00

APERF/MPERF support for cpu_power.

APERF/MPERF is arch defined to be a relative scale of work capacity
per logical cpu, this is assumed to include SMT and Turbo mode.

APERF/MPERF are specified to both reset to 0 when either counter
wraps, which is highly inconvenient, since that'll give a blimp
when that happens. The manual specifies writing 0 to the counters
after each read, but that's 1) too expensive, and 2) destroys the
possibility of sharing these counters with other users, so we live
with the blimp - the other existing user does too.

Signed-off-by: Peter Zijlstra 
LKML-Reference: 
Signed-off-by: Ingo Molnar

Merge branch 'bugfix' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen into x86/urgent

2009-08-20T10:05:24+00:00

x86: make sure load_percpu_segment has no stackprotector

2009-08-20T00:09:21+00:00

load_percpu_segment() is used to set up the per-cpu segment registers,
which are also used for -fstack-protector.  Make sure that the
load_percpu_segment() function doesn't have stackprotector enabled.

[ Impact: allow percpu setup before calling stack-protected functions ]

Signed-off-by: Jeremy Fitzhardinge