b3bd153180
Requirement: in CPU partition VM (RTVM), vtune or perf can be used to sample hotspot code path to tune the RT performance, It need support PMU/PEBS (Processor Event Based Sampling). Intel TCC asks for it, too. It exposes PEBS related capabilities/features and MSRs to CPU partition VM, like RTVM. PEBS is a part of PMU. Also PEBS needs DS (Debug Store) feature to support. So DS is exposed too. Limitation: current it just support PEBS feature in VM level, when CPU traps to HV, the performance counter will stop. Perf global control MSR is used to do this work. So, the counters shall be close to native. Tracked-On: #6966 Acked-by: Anthony Xu <anthony.xu@intel.com> Signed-off-by: Minggui Cao <minggui.cao@intel.com> |
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| arch/x86/asm | ||
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| debug | ||
| dm | ||
| hw | ||
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| public | ||