[tboot-devel] TPM_Extend Attempt

[Jonathan M. <jon...@cm...>]

Hello,

tboot-20101005 is rebooting at GETSEC[SENTER].  Here is information
about the system:

Laptop: Dell Latitude E6400 with BIOS rev A28 (latest available as of
2011.03.20). VT-d, VT-x, TXT, TPM are all enabled in BIOS.

SINIT: GM45_GS45_PM45_SINIT_21.BIN

tboot-20101005, both default and debug builds. No LCP configured.


TPM: Broadcom:

$ tpm_version
 TPM 1.2 Version Info:
 Chip Version:        1.2.7.11
 Spec Level:          2
 Errata Revision:     1
 TPM Vendor ID:       BRCM
 TPM Version:         01010000
 Manufacturer Info:   4252434d

Note that it did not ship with an Endorsement Key.  I did tpm_createek
and tpm_takeownership with trousers from Ubuntu Linux v9.04.

Attached is the logfile harvested with txt-stat after a reboot.
TXT.ERRORCODE is 0xc00040d1, which is "AC module error : acm_type=1,
progress=0d, error=0", with description "TPM_Extend Attempt" in
sinit_errors.txt.

I haven't seen this before and I'm not sure how to interpret it.  The
TPM works fine in Linux.  It looks like tboot's GetCapability calls to
the TPM are returning meaningful values, so it looks like tboot is
interacting with the TPM in a reasonable way.

Any ideas on what might be wrong?

Thanks,
-Jon