tools/power/turbostat: Fallback to an MSR read for EPB
Commit 6d6501d9 ("tools/power/turbostat: Read energy_perf_bias from sysfs") converted turbostat to read the energy_perf_bias value from sysfs. However, older kernels which do not have that file yet, would fail. For those, fall back to the MSR reading. Fixes: 6d6501d9 ("tools/power/turbostat: Read energy_perf_bias from sysfs") Reported-by:Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by:
Borislav Petkov <bp@suse.de> Tested-by:
Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Link: https://lkml.kernel.org/r/20210127132444.981120-1-dedekind1@gmail.com
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