pcm-iio reports wrong IB write/read data on iio pcie stack

[fmiao2372]

pcm-iio fails to dump stack "IIO Stack 2 - PCIe0" to get Intel data center max GPU(device id: 0BDB) pcie r/w, it always zero.
However, the "IIO Stack 1 - DMI" show the corrected data, about 40G.

my cpu model:
model : 143
model name : Intel(R) Xeon(R) Gold 6438Y+

results of pcm-iio:

And, it works on Intel(R) Xeon(R) Platinum 8469 CPU @2.00GHz.

Does pcm-iio support all types of SPR? Is there any other iio stack mapping of SPR CPU?
pcm-iio.cpp line 173