[PATCH 0/8] Support for 24x7 hcall interface version 2

[Thiago Jung Bauermann]

Hello,

The hypervisor interface to access 24x7 performance counters (which collect
performance information from system power on to system power off) has been
extended in POWER9 adding new fields to the request and result element
structures.

Also, results for some domains now return more than one result element and
those need to be added to get a total count.

The first two patches fix bugs in the existing code. The following 4
patches are code improvements and the last two finally implement support
for the changes in POWER9 described above.

POWER8 systems only support version 1 of the interface, while POWER9
systems only support version 2. I tested these patches on POWER8 to verify
that there are no regressions, and also on POWER9 DD1.

Thiago Jung Bauermann (8):
  powerpc/perf/hv-24x7: Fix passing of catalog version number
  powerpc/perf/hv-24x7: Fix off-by-one error in request_buffer check
  powerpc/perf/hv-24x7: Properly iterate through results
  powerpc-perf/hx-24x7: Don't log failed hcall twice
  powerpc/perf/hv-24x7: Fix return value of hcalls
  powerpc/perf/hv-24x7: Minor improvements
  powerpc/perf/hv-24x7: Support v2 of the hypervisor API
  powerpc/perf/hv-24x7: Aggregate result elements on POWER9 SMT8

 arch/powerpc/perf/hv-24x7.c            | 255 +++++++++++++++++++++++++--------
 arch/powerpc/perf/hv-24x7.h            |  70 +++++++--
 arch/powerpc/platforms/pseries/Kconfig |   2 +-
 3 files changed, 255 insertions(+), 72 deletions(-)

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2.7.4