crossystem(1)

Usage:

crossystem [--all]

Prints all parameters with descriptions and current values. If --all is specified, prints even normally hidden fields.

crossystem [param1 [param2 [...]]]

Prints the current value(s) of the parameter(s).

crossystem [param1=value1] [param2=value2 [...]]]

Sets the parameter(s) to the specified value(s).

crossystem [param1?value1] [param2?value2 [...]]]

Checks if the parameter(s) all contain the specified value(s).

Stops at the first error. Valid parameters:

arch

Platform architecture

backup_nvram_request

Backup the nvram somewhere at the next boot. Cleared on success.

battery_cutoff_request

Cut off battery and shutdown on next boot.

block_devmode

Block all use of developer mode

clear_tpm_owner_request

Clear TPM owner on next boot

clear_tpm_owner_done

Clear TPM owner done

cros_debug

OS should allow debug features

dbg_reset

Debug reset mode request (writable)

debug_build

OS image built for debug features

dev_boot_usb

Enable developer mode boot from USB/SD (writable)

dev_boot_legacy

Enable developer mode boot Legacy OSes (writable)

dev_boot_signed_only

Enable developer mode boot only from official kernels (writable)

dev_default_boot

default boot from legacy or usb (writable)

devsw_boot

Developer switch position at boot

devsw_cur

Developer switch current position

disable_dev_request

Disable virtual dev-mode on next boot

ecfw_act

Active EC firmware

fmap_base

Main firmware flashmap physical address

fwb_tries

Try firmware B count (writable)

fw_vboot2

1 if firmware was selected by vboot2 or 0 otherwise

fwid

Active firmware ID

fwupdate_tries

Times to try OS firmware update (writable, inside kern_nv)

fw_tried

Firmware tried this boot (vboot2)

fw_try_count

Number of times to try fw_try_next (writable)

fw_try_next

Firmware to try next (vboot2,writable)

fw_result

Firmware result this boot (vboot2,writable)

fw_prev_tried

Firmware tried on previous boot (vboot2)

fw_prev_result

Firmware result of previous boot (vboot2)

hwid

Hardware ID

kern_nv

Non-volatile field for kernel use

kernkey_vfy

Type of verification done on kernel key block

loc_idx

Localization index for firmware screens (writable)

mainfw_act

Active main firmware

mainfw_type

Active main firmware type

nvram_cleared

Have NV settings been lost? Write 0 to clear

oprom_needed

Should we load the VGA Option ROM at boot?

recovery_reason

Recovery mode reason for current boot

recovery_request

Recovery mode request (writable)

recovery_subcode

Recovery reason subcode (writable)

recoverysw_boot

Recovery switch position at boot

recoverysw_cur

Recovery switch current position

recoverysw_ec_boot

Recovery switch position at EC boot

ro_fwid

Read-only firmware ID

sw_wpsw_boot

Firmware write protect software setting enabled at boot (Baytrail only)

tpm_attack

TPM was interrupted since this flag was cleared

tpm_fwver

Firmware version stored in TPM

tpm_kernver

Kernel version stored in TPM

tpm_rebooted

TPM requesting repeated reboot (vboot2)

try_ro_sync

try read only software sync

tried_fwb

Tried firmware B before A this boot

vdat_flags

Flags from VbSharedData

vdat_lfdebug

LoadFirmware() debug data (not in print-all)

vdat_lkdebug

LoadKernel() debug data (not in print-all)

vdat_timers

Timer values from VbSharedData

wipeout_request

Firmware requested factory reset (wipeout)

wpsw_boot

Firmware write protect hardware switch position at boot

wpsw_cur

Firmware write protect hardware switch current position