How to view I/O bridge in linux?

Question

My laptop lenovo legion r7000 2020 env (with amd r7 4800h cpu):

$ uname -a
Linux CzgArch 6.3.8-arch1-1 #1 SMP PREEMPT_DYNAMIC Wed, 14 Jun 2023 20:10:31 +0000 x86_64 GNU/Linux

Recently when I searched for NUMA, I found this Q&A, then I get the image by lstopo --of png > server.png: cpu_arch (I don't have enough reputation. So you should open the link to view the image. Sorry. This is my first question.)

Then I viewed the man lstopo and found the 2.0 on the line between package and PCI 01:00:0 is I/O bridge. Does it mean the same as PCI/PCI bridge?

I used the lspci -tvv to view the bridge, but not found related infos:

$ lspci -tvv                   
-[0000:00]-+-00.0  Advanced Micro Devices, Inc. [AMD] Renoir/Cezanne Root Complex
           +-00.2  Advanced Micro Devices, Inc. [AMD] Renoir/Cezanne IOMMU
           +-01.0  Advanced Micro Devices, Inc. [AMD] Renoir PCIe Dummy Host Bridge
           +-01.1-[01]--+-00.0  NVIDIA Corporation TU117M
           |            \-00.1  NVIDIA Corporation Device 10fa
...

Here [01]--+-00.0 corresponds to the above image 01:00.0 device.

Q: how to interpret bridge strings like 2.0 in the above image?

please be more specific if it is a business related question in a business environment — djdomi, Jul 02 '23 at 19:13
Thanks for the comment. I found the referenced Q&A in serverfault, so I posted here. It isn't in one business environment. I will update my question with some information about my laptop. Hope that will help you understand my question. — zg c, Jul 02 '23 at 19:35

How to view I/O bridge in linux?

0 Answers0