This error is:
ERRORCODE: 0xc0002051
AC module error : acm_type=0x1, progress=0x05, error=0x8
Which sinit_error.txt shows as:
           01000     OsSinitDataSize incorrect

This shouldn't happen with unmodified tboot code.  If you're using your own 
code, or have modified tboot, please ensure that you have set the 
OsSinitDataSize field correctly per the MLE Developers Guide.

Joe

From: Sansar Choinyambuu [mailto:sunny_a42...@yahoo.com]
Sent: Monday, May 02, 2011 8:53 AM
To: tboot-devel@lists.sourceforge.net
Subject: [tboot-devel] TXT ERRORCODE 0xc0002051 for i5_i7_DUAL-SINIT

Hello

Could somebody explain the meaning of TXT ERRORCODE: 0xc0002051 for 
i5_i7_DUAL-SINIT AC module?

I hoped to find this out in sinit_errors.txt file included in AC module without 
success.
My PC is rebooting at the processor instruction GETSEC[SENTER].

The following is the print-out from txt-stat of tboot/utils.
Intel(r) TXT Configuration Registers:
            STS: 0x00000002
                senter_done: FALSE
                sexit_done: TRUE
                mem_unlock: FALSE
                mem_config_lock: FALSE
                private_open: FALSE
                mem_config_ok: FALSE
            ESTS: 0x00
                txt_reset: FALSE
                txt_wake_error: FALSE
            E2STS: 0x0000000000000000
                slp_entry_error: FALSE
                secrets: FALSE
                block_mem: FALSE
                reset: FALSE
            ERRORCODE: 0xc0002051
            DIDVID: 0x0000001fa0008086
                vendor_id: 0x8086
                device_id: 0xa000
                revision_id: 0x1f
            SINIT.BASE: 0xcb700000
            SINIT.SIZE: 131072B (0x20000)
            HEAP.BASE: 0xcb720000
            HEAP.SIZE: 917504B (0xe0000)
            DPR: 0x00000000cb800031
                lock: TRUE
                top: 0xcb800000
                size: 3MB (3145728B)
***********************************************************
             TXT measured launch: FALSE
             secrets flag set: FALSE
***********************************************************
bios_data (@0x7f87aad4e018, 2c):
             version: 3

             bios_sinit_size: 0x0 (0)
             lcp_pd_base: 0x0
             lcp_pd_size: 0x0 (0)
             num_logical_procs: 4
             flags: 0x00000000
unable to find TBOOT log



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