+Robert Richter Hi Andy, The cd6h/cd7h port I/O can be disabled on recent AMD processors and these changes replace the cd6h/cd7h port I/O accesses with with MMIO accesses. I can provide more details or answer questions. Regards, Terry On 1/11/22 6:39 AM, Wolfram Sang wrote: > >> I have briefly read the discussion by the link you provided above in >> this thread. I'm not sure I understand the issue and if Intel hardware >> is affected. Is there any summary of the problem? > > I guess the original patch description should explain it. You can find > it here: > > http://patchwork.ozlabs.org/project/linux-i2c/patch/20210715221828.244536-1-Terry.Bowman@xxxxxxx/ > > If this is not sufficient, hopefully Terry can provide more information? >