topic Re: MCTP over I3C in Software Tuning, Performance Optimization & Platform Monitoring

MCTP over I3C

danclewis — Fri, 21 Nov 2025 20:22:40 GMT

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

Re: MCTP over I3C

ninjaturtle — Tue, 24 Feb 2026 13:24:59 GMT

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 ..