On Feb 25, 2010, at 6:09 PM, Scott Wood wrote:

This implements perf_event support for the Freescale embedded =

performance

monitor, based on the existing perf_event.c that supports =

server/classic

chips.
=20
Some limitations:
- Performance monitor interrupts are regular EE interrupts, and thus =

you

 can't profile places with interrupts disabled.  We may want to =

implement

 soft IRQ-disabling, with perfmon interrupts exempted and treated as =

NMIs.

- When trying to schedule multiple event groups at once, and using
 restricted events, situations could arise where scheduling fails even
 though it would be possible.  Consider three groups, each with two =

events.

 One group has restricted events, the others don't.  The two =

non-restricted

 groups are scheduled, then one is removed, which happens to occupy =

the two

 counters that can't do restricted events.  The remaining =

non-restricted

 group will not be moved to the non-restricted-capable counters to =

make

 room if the restricted group tries to be scheduled.
=20
Signed-off-by: Scott Wood <redacted>
---
Changes from previous version:
- Factored out callchain makefile patch
- Split up header files
- Renamed pmu struct
- Added threshold support
=20
arch/powerpc/include/asm/perf_event.h              |  133 +----
arch/powerpc/include/asm/perf_event_fsl_emb.h      |   50 ++
.../asm/{perf_event.h =3D> perf_event_server.h}      |    4 +-
arch/powerpc/include/asm/reg_fsl_emb.h             |    2 +-
arch/powerpc/kernel/Makefile                       |    4 +
arch/powerpc/kernel/cputable.c                     |    2 +-
arch/powerpc/kernel/e500-pmu.c                     |  129 ++++
arch/powerpc/kernel/perf_event_fsl_emb.c           |  654 =

++++++++++++++++++++

arch/powerpc/platforms/Kconfig.cputype             |   10 +
9 files changed, 874 insertions(+), 114 deletions(-)
rewrite arch/powerpc/include/asm/perf_event.h (92%)
create mode 100644 arch/powerpc/include/asm/perf_event_fsl_emb.h
rename arch/powerpc/include/asm/{perf_event.h =3D> =

perf_event_server.h} (98%)

create mode 100644 arch/powerpc/kernel/e500-pmu.c
create mode 100644 arch/powerpc/kernel/perf_event_fsl_emb.c

Paul do you intend to Ack this or don't care?

- k