Tboot works fine with a Linux kernel that supports it (2.6.35+). You can find more details on it in the kernel source tree at Documentation/intel_txt.txt.
From: Ning Qu [mailto:email@example.com]
Sent: Tuesday, February 14, 2012 5:43 PM
Subject: [tboot-devel] is that possible to use tboot with Linux kernel only?
Just read through the readme, seems right now Xen is required ... Any one tried to use tboot with Linux Kernel only scenario?