• Add PERF_PARAM_CPU_CLOCK constant
  
• Add PERF_PARAM_TASK_CLOCK constant
  
• Add PERF_PARAM_PAGE_FAULTS constant
  
• Add PERF_PARAM_CONTEXT_SWITCHES constant
  
• Add PERF_PARAM_CPU_MIGRATIONS constant
  
• Add PERF_PARAM_PAGE_FAULTS_MIN constant
  
• Add PERF_PARAM_PAGE_FAULTS_MAJ constant
  
• Add PERF_PARAM_ALIGNMENT_FAULTS constant
  
• Add PERF_PARAM_EMULATION_FAULTS constant
  
• Add block threshold event
  
• Add virDomainSetBlockThreshold API
  
• Add VIR_MIGRATE_TLS constant