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| author | Duncan Laurie <dlaurie@google.com> | 2018-04-12 10:20:16 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2018-04-17 15:47:13 -0700 |
| commit | 534194ead77895dd131ed59b968b21a2ae36f133 (patch) | |
| tree | 28506beacf01d948e008b903b21e2b27e41a9e92 /host | |
| parent | f2a16b86fa1830e425fa66923b8ed3e2099b955d (diff) | |
| download | vboot-534194ead77895dd131ed59b968b21a2ae36f133.tar.gz | |
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:74339386
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>
Diffstat (limited to 'host')
| -rw-r--r-- | host/lib/crossystem.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/host/lib/crossystem.c b/host/lib/crossystem.c index f379d228..e8c48d86 100644 --- a/host/lib/crossystem.c +++ b/host/lib/crossystem.c @@ -508,6 +508,8 @@ int VbGetSystemPropertyInt(const char *name) value = vb2_get_nv_storage(VB2_NV_DEV_BOOT_SIGNED_ONLY); } else if (!strcasecmp(name,"dev_boot_fastboot_full_cap")) { value = vb2_get_nv_storage(VB2_NV_DEV_BOOT_FASTBOOT_FULL_CAP); + } else if (!strcasecmp(name,"dev_enable_udc")) { + value = vb2_get_nv_storage(VB2_NV_DEV_ENABLE_UDC); } else if (!strcasecmp(name,"oprom_needed")) { value = vb2_get_nv_storage(VB2_NV_OPROM_NEEDED); } else if (!strcasecmp(name,"recovery_subcode")) { @@ -708,6 +710,9 @@ int VbSetSystemPropertyInt(const char *name, int value) } else if (!strcasecmp(name, "fastboot_unlock_in_fw")) { return vb2_set_nv_storage_with_backup( VB2_NV_FASTBOOT_UNLOCK_IN_FW, value); + } else if (!strcasecmp(name, "dev_enable_udc")) { + return vb2_set_nv_storage_with_backup( + VB2_NV_DEV_ENABLE_UDC, value); } else if (!strcasecmp(name, "boot_on_ac_detect")) { return vb2_set_nv_storage_with_backup( VB2_NV_BOOT_ON_AC_DETECT, value); |