6 Replies Latest reply on Oct 13, 2017 7:33 AM by mike_berger

    DMI - Intel oem structures?

    mike_berger

      Hi Everyone!

      I have been recently poking around with the smbios spec to write my own DMI decoder (just for pure fun of it) and at the point when I've started to look at the OEM-specific data, I noticed that there's a couple of structures pointing at Intel's proprietary stuff. Here are examples:

       

      # hexdump -v -C /sys/firmware/dmi/entries/130-0/raw

      00000000  82 14 0a 00 24 41 4d 54  01 01 01 01 01 a5 ff 03  |....$AMT........|

      00000010  00 00 01 00 00 00                                 |......|

      00000016

      # hexdump -v -C /sys/firmware/dmi/entries/131-0/raw

      00000000  83 40 0b 00 35 00 00 00  07 00 00 00 00 00 3f 00  |.@..5.........?.|

      00000010  f8 00 4f 1c ff ff ff ff  09 e0 00 00 01 00 07 00  |..O.............|

      00000020  76 04 1e 00 00 00 00 00  c8 00 02 15 00 00 00 00  |v...............|

      00000030  00 00 00 00 f6 00 00 00  76 50 72 6f 00 00 00 00  |........vPro....|

      00000040  00 00                                             |..|

      00000042

      # hexdump -v -C /sys/firmware/dmi/entries/131-1/raw

      00000000  83 16 31 00 01 00 00 00  00 00 00 00 00 00 00 00  |..1.............|

      00000010  00 00 00 00 00 01 54 56  54 2d 45 6e 61 62 6c 65  |......TVT-Enable|

      00000020  6d 65 6e 74 00 00                                 |ment..|

      00000026

       

      Now, I am not sure about the last one, but 130-0 131-0 clearly have some ascii codes in the structure which point at Intel's vPRO|AMT technologies (though 131-1 is second instance of the same type, thus should be Intel's as well).

       

      My question here would be, if there's any documentation available which covers above structures (Assuming that those are indeed Intel's ) so it could be used as a reference and map for getting some more useful data about given components.

       

      The above was taken from T420 ThinkPad Lenovo Laptop with EC: 1.20, BIOS: 1.46 (83ET76WW), SMBIOS: 2.6, spinning on Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz. Let me know if you would need some additional info to look into this.

       

      Thanks in advance for your input!

       

      Regards,

      Michal