tools/power turbostat: Check for non-zero value when MSR probing

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For some MSRs, for example, the Platform Energy Counter (RAPL PSYS), it
is required to additionally check for a non-zero value to confirm that
it is present.

From Intel SDM vol. 4:

    Platform Energy Counter (R/O)
    This MSR is valid only if both platform vendor hardware
    implementation and BIOS enablement support it.
    This MSR will read 0 if not valid.

Signed-off-by: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

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Patryk Wlazlyn 2025-01-14 16:11:28 +01:00 • committed by Len Brown

parent 1af5baeda5

commit 7c6fee25bd

1 changed files with 7 additions and 3 deletions

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tools/power/x86/turbostat/turbostat.c

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