Right.
The tboot policy was extended to PCR 17 in the code, if 
TB_POLCTL_EXTEND_PCR17 is set.

Thanks.
Shane

Michael Gissing wrote:
> Hi!
> 
> I tried to calculate the final value of PCR 18 by paper and pen, it 
> seems that tboot README is wrong about that. In section "PCR Usage" it 
> says that tboot policy will also be extended to PCR 18, that's wrong.
> 
> PCR 18 is calculated only by:
> 1) extend hash of tboot (as measured by lcp_mlehash)
> 2) extend (SHA-1(commandline of first module) | SHA-1(first module))
> 
> greetz
> Michael
> 
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