Linux lets this happen?
AMD has something similar, but it is optional, it is an ARM chip added in, and it doesn't have the lack of transparency Intel has kept on what it can do. For AMD, the ARM chip portion can do two things: 1) serves as a general offload device for encryption/decryption work and 2) Independently check all x86 modules for appropriate checksums of programs/modules and terminate unauthorized code, if desired. Intel's approach does program a permanent back door for remote monitoring for which you can not know this is occurring over your network or through the Internet.
This is how I understand the Intel and AMD approaches, as of today.