[SOLVED] PCIE Passthrough Vendor ID?

May 1, 2022
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Hello,

i configure pci passthrough on my Proxmox and i saw in the GUI under the Advanced tab the Option to assign a Vendor / Device ID, but what is the usecase of this "feature" and in what format do i have to enter the Vendor / Device ID?

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br
NojuHD
 
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oguz

Proxmox Retired Staff
Retired Staff
Nov 19, 2018
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hi,

but what is the usecase of this "feature"
it allows you to set an arbitrary vendor ID and device ID for the passthroughed device, e.g. your GPU.
the guest would then see that ID, instead of the actual vendor of the device.

for a standard PCI passthrough normally it's not necessary to spoof this value.

what format do i have to enter the Vendor / Device ID?
it's in the form of hexadecimal numbers, for example 0x1002 or 0x1022 in the beginning is for AMD devices (vendor ID). you can also look them up in /usr/share/misc/pci.ids. to see your devices ids' you can use lspci -nn. the last part that looks like [somenumber:somenumber] is the identifier, e.g. [10de:0040] would be NVIDIA GeForce 6800 Ultra, and would have the values 0x10de (vendor ID) and 0x0040 (device ID).

also take a look here [0] and man pci.ids

hope this explains some things for you!

[0]: https://wiki.debian.org/HowToIdentifyADevice/PCI
 
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pilgrimage

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Oct 17, 2021
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How exactly can we do this?

/usr/share/misc/pci.ids


It looks like the following in the list.


My Default lspci output Proxmox.
682b Cape Verde PRO / Venus LE / Tropo PRO-L [Radeon HD 8830M / R7 250 / R7 M465X]
0128 079c Radeon R7 465X
1462 3012 Radeon R7 250






i guess i need to enter this vendor id. However, I couldn't figure out where to enter.


683d Cape Verde XT [Radeon HD 7770/8760 / R7 250X]
1002 0030 Radeon HD 8760 OEM
1019 0030 Radeon HD 8760 OEM
103c 6890 Radeon HD 8760 OEM
1043 8760 Radeon HD 8760 OEM
1462 2710 R7770-PMD1GD5
174b 8304 Radeon HD 8760 OEM

By the way, my card feature actually is:

https://www.techpowerup.com/gpu-specs/dell-r7-450-4-gb.b4966

thankyou.
 

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