Hi,

Looking at the tboot source code it seems to support finding and installing a 
user-provided AC module. Is this feature actually used with recent systems or 
do all systems ship with an ACM installed?

I found the following line in the TXT development guide 
<http://www.intel.com/content/www/us/en/software-developers/intel-txt-software-development-guide.html>:

|Since the TXT architecture requires that BIOS provide at least one BIOS ACM, 
NumAcms must always be greater than 0. |

So it appears an ACM must be installed. Are there any known systems violating 
this constraint?

Thanks,
Daniel

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