On Mon, Oct 02, 2017 at 05:02:40PM -0700, Vadim Bendebury wrote:
> note that this debug header is going away in new Chrome OS designs. Its
> functionality is going to be provided by the closed case debugging (aka
> CCD) facility, where authorized user using a special debug cable can gain
> access to the AP and EC consoles, reprogram  AP and EC firmware, etc.

Will the closed chassis debugging require user authorization of some sort
and perhaps only be effective in developer mode?  One of the major
concerns with the Intel SVT adapter is that it claims to work "where
USB3-hosted DCI is unavailable", including cold-boot:

https://designintools.intel.com/product_p/itpxdpsvt.htm

There were talks about it at CCC and HITB:

https://conference.hitb.org/hitbsecconf2017ams/materials/D2T4%20-%20Maxim%20Goryachy%20and%20Mark%20Ermalov%20-%20Intel%20DCI%20Secrets.pdf

Hopefully the Chromebook CCD doesn't turn into an evil-maid toolkit...

--
Trammell