Kernel driver Ampere(R)’s Altra(R) SMpro hwmon¶
Supported chips:
Ampere(R) Altra(R)
Prefix:
smproReference: Altra SoC BMC Interface Specification
Author: Thu Nguyen <thu@os.amperecomputing.com>
Description¶
The smpro-hwmon driver supports hardware monitoring for Ampere(R) Altra(R) SoCs based on the SMpro co-processor (SMpro). The following sensor metrics are supported by the driver:
- temperature
- voltage
- current
- power
The interface provides the registers to query the various sensors and their values which are then exported to userspace by this driver.
Usage Notes¶
The driver creates at least two sysfs files for each sensor.
<sensor_type><idx>_labelreports the sensor label.<sensor_type><idx>_inputreturns the sensor value.
The sysfs files are allocated in the SMpro rootfs folder, with one root directory for each instance.
When the SoC is turned off, the driver will fail to read registers and
return -ENXIO.
Sysfs entries¶
The following sysfs files are supported:
Ampere(R) Altra(R):
Name Unit Perm Description temp1_input millicelsius RO SoC temperature temp2_input millicelsius RO Max temperature reported among SoC VRDs temp2_crit millicelsius RO SoC VRD HOT Threshold temperature temp3_input millicelsius RO Max temperature reported among DIMM VRDs temp4_input millicelsius RO Max temperature reported among Core VRDs temp5_input millicelsius RO Temperature of DIMM0 on CH0 temp5_crit millicelsius RO MEM HOT Threshold for all DIMMs temp6_input millicelsius RO Temperature of DIMM0 on CH1 temp6_crit millicelsius RO MEM HOT Threshold for all DIMMs temp7_input millicelsius RO Temperature of DIMM0 on CH2 temp7_crit millicelsius RO MEM HOT Threshold for all DIMMs temp8_input millicelsius RO Temperature of DIMM0 on CH3 temp8_crit millicelsius RO MEM HOT Threshold for all DIMMs temp9_input millicelsius RO Temperature of DIMM0 on CH4 temp9_crit millicelsius RO MEM HOT Threshold for all DIMMs temp10_input millicelsius RO Temperature of DIMM0 on CH5 temp10_crit millicelsius RO MEM HOT Threshold for all DIMMs temp11_input millicelsius RO Temperature of DIMM0 on CH6 temp11_crit millicelsius RO MEM HOT Threshold for all DIMMs temp12_input millicelsius RO Temperature of DIMM0 on CH7 temp12_crit millicelsius RO MEM HOT Threshold for all DIMMs temp13_input millicelsius RO Max temperature reported among RCA VRDs in0_input millivolts RO Core voltage in1_input millivolts RO SoC voltage in2_input millivolts RO DIMM VRD1 voltage in3_input millivolts RO DIMM VRD2 voltage in4_input millivolts RO RCA VRD voltage cur1_input milliamperes RO Core VRD current cur2_input milliamperes RO SoC VRD current cur3_input milliamperes RO DIMM VRD1 current cur4_input milliamperes RO DIMM VRD2 current cur5_input milliamperes RO RCA VRD current power1_input microwatts RO Core VRD power power2_input microwatts RO SoC VRD power power3_input microwatts RO DIMM VRD1 power power4_input microwatts RO DIMM VRD2 power power5_input microwatts RO RCA VRD power Example:
# cat in0_input 830 # cat temp1_input 37000 # cat curr1_input 9000 # cat power5_input 19500000