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crossystem: provide a way to clear wipeout request

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For test purposes it should be possible to clear the wipeout request
raised by firmware.

BRANCH=none
BUG=chrome-os-partner:36059
TEST=verified that crossystem wipeout_request=0 changes the bit from 1
     to 0, and wipeout_request=1 does not change it from 0 to 1.

Change-Id: Ic45ec03ed3e40e6fee4244804b8c231ee88af95b
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/262466
Reviewed-by: Randall Spangler <rspangler@chromium.org>
This commit is contained in:
Vadim Bendebury
2015-03-25 14:50:02 -07:00
committed by ChromeOS Commit Bot
parent 39392528f4
commit 52ec075896
3 changed files with 11 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
firmware/lib/vboot_nvstorage.c
View File

@@ -366,6 +366,13 @@ int VbNvSet(VbNvContext *context, VbNvParam param, uint32_t value)
raw[BOOT2_OFFSET] |= (uint8_t)value << BOOT2_PREV_RESULT_SHIFT;
break;
case VBNV_FW_REQ_WIPEOUT:
if (value)
raw[HEADER_OFFSET] |= HEADER_WIPEOUT;
else
raw[HEADER_OFFSET] &= ~HEADER_WIPEOUT;
break;
default:
return 1;
}

3
host/lib/crossystem.c
View File

@@ -617,6 +617,9 @@ int VbSetSystemPropertyInt(const char* name, int value) {
return VbSetNvStorage(VBNV_FW_TRY_COUNT, value);
} else if (!strcasecmp(name,"oprom_needed")) {
return VbSetNvStorage(VBNV_OPROM_NEEDED, value);
} else if (!strcasecmp(name,"wipeout_request")) {
/* Can only clear this flag, set only by firmware. */
return VbSetNvStorage(VBNV_FW_REQ_WIPEOUT, 0);
} else if (!strcasecmp(name,"backup_nvram_request")) {
/* Best-effort only, since it requires firmware and TPM support. */
return VbSetNvStorage(VBNV_BACKUP_NVRAM_REQUEST, value);

2
utility/crossystem.c
View File

@@ -95,7 +95,7 @@ const Param sys_param_list[] = {
{"vdat_lkdebug", IS_STRING|NO_PRINT_ALL,
"LoadKernel() debug data (not in print-all)"},
{"vdat_timers", IS_STRING, "Timer values from VbSharedData"},
{"wipeout_request", 0, "Firmware requested factory reset (wipeout)"},
{"wipeout_request", CAN_WRITE, "Firmware requested factory reset (wipeout)"},
{"wpsw_boot", 0, "Firmware write protect hardware switch position at boot"},
{"wpsw_cur", 0, "Firmware write protect hardware switch current position"},
/* Terminate with null name */