4e949e9b9d
The SMM freeze feature was introduced since PerfMon V2. But the current
code unconditionally enables the feature for all platforms. It can
generate #GP exception, if the related FREEZE_WHILE_SMM bit is set for
the machine with PerfMon V1.
To disable the feature for PerfMon V1, perf needs to
- Remove the freeze_on_smi sysfs entry by moving intel_pmu_attrs to
intel_pmu, which is only applied to PerfMon V2 and later.
- Check the PerfMon version before flipping the SMM bit when starting CPU
Fixes:
|
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|---|---|---|
| .. | ||
| bts.c | ||
| core.c | ||
| cstate.c | ||
| ds.c | ||
| knc.c | ||
| lbr.c | ||
| Makefile | ||
| p4.c | ||
| p6.c | ||
| pt.c | ||
| pt.h | ||
| rapl.c | ||
| uncore_nhmex.c | ||
| uncore_snb.c | ||
| uncore_snbep.c | ||
| uncore.c | ||
| uncore.h | ||