Question for AMD users: How many USB controllers?

General Discussion
1

A question for all AMD users: How many USB controllers does your motherboard have?
Can you tell me the model of your motherboard and the results of these commands:
qvm-pci | grep -i usb | wc -l
lspci | grep -i usb | wc -l
cat /sys/class/dmi/id/board_name

Here’s what it looks like for me:
[user@dom0 ~]$ qvm-pci | grep -i usb | wc -l
1
[user@dom0 ~]$ lspci | grep -i usb | wc -l
1
[user@dom0 ~]$ cat /sys/class/dmi/id/board_name
PRIME B760M-A

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Are USB Keyboards actually ruining the isolation-based security?
2

I guess the audience here is bit tot paranoid (rightfully) to provide you with a considerable amount of information.

You should have a look at the various chipsets and the distinct controllers they offer. (typically 1-2)

Maybe also take into account that some boards come with additional 3rd party usb controllers. But these, you could filter in product search engines …

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3

Manufacturers almost never specify how many USB controllers a motherboard has, except for ultra-high-end motherboards.

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4

I’m not sure from the way the question was set if you know it, but with modern AMD AM4 and AM5 CPUs you can have USB host controllers both in the CPU and in the motherboard chipset. You can also have extra third party controllers on the motherboard if you buy premium. Figuring out what you will get is complicated and figuring out if you can pass through some or any of the controllers individually is even more complicated.

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