[PATCH V2 0/2] Fix session topology test for powerpc and add utility function to get cpuinfo entries

[Athira Rajeev <atrajeev@linux.vnet.ibm.com>]

The session topology test fails in powerpc pSeries platform.
Test logs:
<<>>
Session topology : FAILED!
<<>>

This test uses cpu topology information and in powerpc,
some of the topology info is restricted in environment
like virtualized platform. Hence this test needs to be
skipped in pSeries platform for powerpc. The information
about platform is available in /proc/cpuinfo.

Patch 1 adds generic utility function in "util/header.c"
to read /proc/cpuinfo for any entry. Though the testcase
fix needs value from "platform" entry, making this as a
generic function to return value for any entry from the
/proc/cpuinfo file which can be used commonly in future
usecases.

Patch 2 uses the newly added utility function to look for
platform and skip the test in pSeries platform for powerpc.

Athira Rajeev (2):
  tools/perf: Add utility function to read /proc/cpuinfo for any field
  tools/perf/tests: Fix session topology test to skip the test in guest
    environment

Changelog:
 V1 -> v2:
 Addressed review comments from Kajol.
 Use "strim" to remove space from string. Also
 use "feof" to check for EOF instead of using new
 variable "ret".

 tools/perf/tests/topology.c | 17 ++++++++++++
 tools/perf/util/header.c    | 53 +++++++++++++++++++++++++++++++++++++
 tools/perf/util/header.h    |  1 +
 3 files changed, 71 insertions(+)

-- 
2.35.1