Hello Charles

Welcome to the Intel® Embedded Community.

TLP Hints is a feature of PCI Express 2.1.   Follow the link below to a paper that provides some additional info on PCIe 2.1 and 3.0:

https://www-ssl.intel.com/content/www/us/en/io/pci-express/intel-pci-pci-express-3-case-study.html?wapkw=

I am told that the processor platforms currently shipping from Intel are at 2.0 level, not surprising considering the 3.0 spec was only recently published

While I can't make a direction statement on behalf of Intel, I think it's a no brainer that since Intel has spearheaded PCIe innovation ever since the inception of the original PCI that you will see 2.1 / 3.0 support in the processor future roadmap.  In fact if you Google "Intel PCI Express 3.0" you will find third-party articles on the subject. 

Access to the Intel roadmap requires a Confidential Non-Disclosure Agreement (CNDA).   If you are interested in learning more, following is the best way:

Upgrade your community account to Privileged status with the following link.  This will initiate the CNDA process.  (If you are already a Privileged member, then you are already done with this step).

https://edc.intel.com/My-Account.aspx

When you obtain Privileged status, please post another message to this thread and we will give you further directions.

I hope this helps.

Felix

J. Felix McNulty

Community Moderator (Intel contractor)