Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) ================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) MSR Trace Events
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) ================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) The x86 kernel supports tracing most MSR (Model Specific Register) accesses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) To see the definition of the MSRs on Intel systems please see the SDM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) at https://www.intel.com/sdm (Volume 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) Available trace points:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) /sys/kernel/debug/tracing/events/msr/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) Trace MSR reads:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) read_msr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)   - msr: MSR number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)   - val: Value written
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)   - failed: 1 if the access failed, otherwise 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) Trace MSR writes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) write_msr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)   - msr: MSR number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)   - val: Value written
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)   - failed: 1 if the access failed, otherwise 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) Trace RDPMC in kernel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) rdpmc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) The trace data can be post processed with the postprocess/decode_msr.py script::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)   cat /sys/kernel/debug/tracing/trace | decode_msr.py /usr/src/linux/include/asm/msr-index.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) to add symbolic MSR names.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)