Thanks for your reply.
Now I'm trying to use X220 Tablet. It seems that this mode has the same environment as X220.
However, a new problem is which ACM should I use for X220 tablet. Since the CPU of X220 tablet is Intel (R) Core (TM) i7-2620M, I think the 2nd_gen_i5_i7_SINIT_51.BIN should be OK according to the description on http://software.intel.com/en-us/articles/intel-trusted-execution-technology/
. However, when test using utils/acminfo, it reports "ACM does not match platform: processor mismatch". Since X220 and X220 tablet use the same processor, could I know which ACM is suitable for X220?
Using the 2nd_gen_i5_i7_SINIT_51.BIN, I can see some error and the system hangs. But since there is no way to enter the system, I cannot get the concrete error. Booting to an normal kernel without tboot can only get an empty tboot log.
Do you have some suggestions?