tools/power turbostat: Validate RAPL MSRs for AWS Nitro Hypervisor

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Even though the platform->plat_rapl_msrs enumeration may be accurate,
a VM, such as AWS Nitro Hypervisor, may deny access to the underlying MSRs.

Probe if PKG_ENERGY is readable and non-zero.
If no, ignore all RAPL MSRs.

Reported-by: Emily Ehlert <ehemily@amazon.de>
Tested-by: Emily Ehlert <ehemily@amazon.de>
Signed-off-by: Len Brown <len.brown@intel.com>

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Len Brown 2025-11-30 00:11:22 -05:00

parent 51860d6330

commit 19476a592b

1 changed files with 98 additions and 58 deletions

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tools/power/x86/turbostat/turbostat.c

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