Hi again
You can perhaps generate NMI using MSI/MSI-X or HPET (i tried with this)
I did the HPET NMI generator on Intel PCH, it works fine. I just fill the MSI addr/data in a way that it was delivering NMI to certain CPU - physical delivery to a CPU with a certain ID.
If this does not work on AMD, perhaps there is some problem with chipset configuration. Please check the HT specs and try to sort out the MT3 setup.
Thanks Rudolf