Where does libvirt/qemu get CPU information from?

Question

linux

Interested in where Libvirt / qemu get information about the name of the processor, and how it can be replaced. It is necessary because I took the Intel confidential processor from Ali and many do not like this derivation of the name.

Answer 1

From man qemu-cpu-models
Accordingly, replace the use of Host passthrough with some suitable model from the list.

Answer 2

For different companies (Intel, AMD) and for different generations, the ways of finding out the exact brand of the processor varied. Up to the fact that the exact brand of the processor had to be determined by indirect signs such as the length of the pipeline, determined experimentally by a self-modifying program (EMNIP - it ended on the Pentium).
For modern processors, most likely, PnP is used, which gives the code (number) of the manufacturer and device. And then - in the program d.b. a table that contains the human-readable names of each processor brand.
You can check this by looking at the source codes of the programs you specified. If there is a file with names, then I'm right.
PS: And who exactly and why " such a derivation of the name does not suit "?