Module pmu

Chapter 11. Performance Monitoring Unit Extension (EID #0x504D55 “PMU”).

Modules

• cache_event
  Hardware Cache Event ID.
• cache_operation
  Hardware Cache Operation ID.
• cache_result
  Hardware Cache Operation Result ID.
• event_type
  PMU Event Types.
• firmware_event
  Firmware Event Codes.
• hardware_event
  Hardware General Event Codes.
• shmem_size
  Size of shared memory on PMU extension set by supervisor software for current hart.

Constants

• COUNTER_CONFIG_MATCHING
  Function ID to find and configure a counter from a set of counters.
• COUNTER_FW_READ
  Function ID to provide the current value of a firmware counter.
• COUNTER_FW_READ_HI
  Function ID to provide the upper 32 bits from the value of the current firmware counter.
• COUNTER_GET_INFO
  Function ID to get details about the specified counter.
• COUNTER_START
  Function ID to start or enable a set of counters on the calling hart with the specified initial value.
• COUNTER_STOP
  Function ID to stop or disable a set of counters on the calling hart.
• EID_PMU
  Extension ID for Performance Monitoring Unit extension.
• NUM_COUNTERS
  Function ID to get the number of counters, both hardware and firmware.
• SNAPSHOT_SET_SHMEM
  Function ID to set and enable the PMU snapshot shared memory.