[PATCH v4 0/2] powerpc: add support for new hcall H_BEST_ENERGY

[Vaidyanathan Srinivasan]

Hi Ben,

The following series adds a kernel module for powerpc pseries
platforms in order to export platform energy management capabilities.

The module exports data from a new hypervisor call H_BEST_ENERGY.

Some of the comments and suggestions made on the previous iteration of the
patch has been incorporated.

Changes in v4:

* Added more documentation
* Added check_for_h_best_energy() to look in ibm,hypertas-functions so
  that sysfs entries are not created in an unsupported platform
* Added cleaner error checks and correct of_node_put()
* Rebased and tested on 2.6.35-rc5

Changed in v3:

[3] [PATCH v3 0/2] powerpc: add support for new hcall H_BEST_ENERGY
http://lists.ozlabs.org/pipermail/linuxppc-dev/2010-June/083414.html

* Added more documentation in the cleanup patch
* Removed RFC tag, rebased and tested on 2.6.35-rc3
* Ready for inclusion in powerpc/next tree for further testing

Changes in v2:

[2] [RFC PATCH v2 0/2] powerpc: add support for new hcall H_BEST_ENERGY
http://lists.ozlabs.org/pipermail/linuxppc-dev/2010-May/082246.html

* Cleanup cpu/thread/core APIs
* Export APIs to module instead of threads_per_core
* Use of_find_node_by_path() instead of of_find_node_by_name()
* Error checking and whitespace cleanups

First version:
[1] [RFC] powerpc: add support for new hcall H_BEST_ENERGY
http://lists.ozlabs.org/pipermail/linuxppc-dev/2010-March/080796.html

This patch series will apply on 2.6.35-rc5 as well as powerpc/next
tree.  Please review and include in powerpc/next tree for further
testing.  

I could incrementally reduce some of the error checks as suggested by
Michael Neuling as next steps.

Thanks,
Vaidy
---

Vaidyanathan Srinivasan (2):
      powerpc: cleanup APIs for cpu/thread/core mappings
      powerpc: add support for new hcall H_BEST_ENERGY


 arch/powerpc/include/asm/cputhreads.h           |   15 +
 arch/powerpc/include/asm/hvcall.h               |    3 
 arch/powerpc/kernel/smp.c                       |   19 +
 arch/powerpc/mm/mmu_context_nohash.c            |   12 -
 arch/powerpc/platforms/pseries/Kconfig          |   10 +
 arch/powerpc/platforms/pseries/Makefile         |    1 
 arch/powerpc/platforms/pseries/pseries_energy.c |  326 +++++++++++++++++++++++
 7 files changed, 370 insertions(+), 16 deletions(-)
 create mode 100644 arch/powerpc/platforms/pseries/pseries_energy.c