Software Tuning, Performance Optimization & Platform Monitoring
Discussion regarding monitoring and software tuning methodologies, Performance Monitoring Unit (PMU) of Intel microprocessors, and platform updating.
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MCTP over I3C

danclewis
Beginner
‎11-21-2025 12:22 PM
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Hi, I'm testing MCTP over I3C functionality and all of my testing points to the CPU being in a loopback mode.  Is there a special command or procedure for getting the CPU out of this mode and into a full MCTP protocol support mode?  The CPU I'm using is the  Intel(R) Xeon(R) 6740P. i.e. Granit Rapids.
thanks,

Dan

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ninjaturtle
Beginner
‎02-24-2026 05:24 AM
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Hi danclewis , 
I think you can check the driver 
linux/drivers/i3c/mctp at aspeed-master-v6.18 · AspeedTech-BMC/linux · GitHub
and 
linux/drivers/peci/busses/peci-i3c.c at dev-5.15-intel · Intel-BMC/linux · GitHub

a adapter point /dev/peci-0 will be created , 
which can be used to get some cpu info using intel  peci_mctp_test tools , 
Thanks , 
I am also searching about it ..

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