tree a200e542a8e71b556c509d738b3facd4196b7427
parent 1efb5acb5d94900048d55cba5c596a33d30973dc
author Duncan Laurie <dlaurie@google.com> 1523553616 -0700
committer ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> 1524859758 +0000

Add new NV and GBB flag to control UDC

This change adds a new NV and GBB flag for controlling USB device
mode behavior, adding an additional step to enable UDC on systems
that support it.

Users of this feature will need to first enable developer mode and
then enable UDC separately by running "crossystem dev_enable_udc=1".

Alternatively those without write protect enabled can set a GBB
flag to have UDC enabled by default while in developer mode.

This is based on the security reviewed proposal at
https://docs.google.com/document/d/1b6avd9xvhvljN_NKtctWrClj4mSYZ_uPmp7MmAnPwqs

BUG=b:78577893
BRANCH=poppy
TEST=manual testing on Eve device

Change-Id: I6f440320f28b033639b53246d3034bc8acc37a33
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1010769
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1033630
Commit-Queue: Furquan Shaikh <furquan@chromium.org>
Tested-by: Furquan Shaikh <furquan@chromium.org>
Trybot-Ready: Furquan Shaikh <furquan@chromium.org>