[6] TDX consists of multiple components including Virtual Machine Extensions (VMX) instruction set architecture (ISA) extensions, a technology for memory encryption, and a new CPU operation mode called SEAM ("Secure Arbitration Mode"), which hosts the TDX module.
Shared memory is intended to be used for communicating with the TD host and may receive some TDX protections.
The SEAMREPORT instruction generates a MAC-signed "Report" structure which includes information such as the version numbers of the TDX's components.
The VMM would then use SGX enclaves to convert that "Report" structure into a remotely verifiable "Quote", which it would send to the system requesting attestation.
[13] Microsoft Azure has announced that as of April 24, 2023 their new DCesv5-series and ECesv5-series virtual machines would support Intel TDX.
[16] On the VMM host, TDX involves the use of SGX enclaves to enable support for remote attestation.