The first patch adds support for deriving from /proc/cpuinfo and adds
tests. The second patch from Kan Liang derives it from CPUID available
on newer Intel processors as discussed here:
https://lore.kernel.org/lkml/20220527040407.4193232-1-irogers@google.com/#t

v2. Adds warnings to make clear if things have changed/broken on future
    Intel platforms. It also adds caching and an Intel specific that a
    value is computed.

Ian Rogers (1):
  perf metrics: Add literal for system TSC frequency

Kan Liang (1):
  perf tsc: Add arch TSC frequency information

 tools/perf/arch/x86/util/cpuid.h  | 34 +++++++++++++++++
 tools/perf/arch/x86/util/header.c | 27 ++++++--------
 tools/perf/arch/x86/util/tsc.c    | 33 ++++++++++++++++
 tools/perf/tests/expr.c           | 15 ++++++++
 tools/perf/util/expr.c            | 62 +++++++++++++++++++++++++++++++
 tools/perf/util/tsc.h             |  1 +
 6 files changed, 156 insertions(+), 16 deletions(-)
 create mode 100644 tools/perf/arch/x86/util/cpuid.h

-- 
2.37.0.170.g444d1eabd0-goog