Logan, You are right about AMD devices connecting to buses [0000:16] and [0000:64]. However I am unable to understand as to how you extend that to mean they belong to Intel 0x09A2. Per my understanding I am expecting Root Complex enumerated as a device, with various other devices hanging off one or more ports/buses. In the PCIe device tree, I don't see that. I see the [domain::bus] as the root of the AMD device. Furthermore I see Intel devices 0x09A2 hanging off the same domain::bus. I will take your word, but the way the root complex is reported could be less confusing. If I could make a request, it will be very helpfulf for folks who don't dabble in this area with a simple cheat sheet plus write explaining with examples the various root complexes and the variou end-points hanging off of them. Let me know if I could help in this effort. Regards, Ramesh