summaryrefslogtreecommitdiff
path: root/src/security/vboot/Kconfig
blob: 70180c719afd4769591a070abc5f5605f0409d7a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
## This file is part of the coreboot project.
##
## Copyright (C) 2014 The ChromiumOS Authors.  All rights reserved.
## Copyright (C) 2018 Siemens AG
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; version 2 of the License.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##

menu "Verified Boot (vboot)"

config VBOOT
	bool "Verify firmware with vboot."
	default n
	select VBOOT_MOCK_SECDATA if !TPM1 && !TPM2
	depends on !MISSING_BOARD_RESET
	help
	  Enabling VBOOT will use vboot to verify the components of the firmware
	  (stages, payload, etc).

if VBOOT

comment "Anti-Rollback Protection disabled because mocking secdata is enabled."
	depends on VBOOT_MOCK_SECDATA

config VBOOT_MEASURED_BOOT
	bool "Enable Measured Boot"
	default n
	depends on TPM1 || TPM2
	depends on !VBOOT_RETURN_FROM_VERSTAGE
	help
	  Enables measured boot mode in vboot (experimental)

config VBOOT_MEASURED_BOOT_RUNTIME_DATA
	string "Runtime data whitelist"
	default ""
	depends on VBOOT_MEASURED_BOOT
	help
	  Runtime data whitelist of cbfs filenames. Needs to be a comma separated
	  list

config VBOOT_SLOTS_RW_A
	bool "Firmware RO + RW_A"
	help
	  Have one update partition beside the RO partition.

config VBOOT_SLOTS_RW_AB
	bool "Firmware RO + RW_A + RW_B"
	select VBOOT_SLOTS_RW_A
	help
	  Have two update partitions beside the RO partition.

config VBOOT_VBNV_CMOS
	bool
	default n
	depends on PC80_SYSTEM
	help
	  VBNV is stored in CMOS

config VBOOT_VBNV_OFFSET
	hex
	default 0x26
	depends on VBOOT_VBNV_CMOS
	help
	  CMOS offset for VbNv data. This value must match cmos.layout
	  in the mainboard directory, minus 14 bytes for the RTC.

config VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
	bool
	default n
	depends on VBOOT_VBNV_CMOS && BOOT_DEVICE_SUPPORTS_WRITES
	help
	  Vboot non-volatile storage data will be backed up from CMOS to flash
	  and restored from flash if the CMOS is invalid due to power loss.

config VBOOT_VBNV_EC
	bool
	default n
	help
	  VBNV is stored in EC

config VBOOT_VBNV_FLASH
	bool
	default n
	depends on BOOT_DEVICE_SUPPORTS_WRITES
	help
	  VBNV is stored in flash storage

config VBOOT_STARTS_IN_BOOTBLOCK
	bool
	default n
	depends on C_ENVIRONMENT_BOOTBLOCK
	help
	  Firmware verification happens during the end of or right after the
	  bootblock. This implies that a static VBOOT2_WORK() buffer must be
	  allocated in memlayout.

config VBOOT_STARTS_IN_ROMSTAGE
	bool
	default n
	depends on !VBOOT_STARTS_IN_BOOTBLOCK
	help
	  Firmware verification happens during the end of romstage (after
	  memory initialization). This implies that vboot working data is
	  allocated in CBMEM.

config VBOOT_MOCK_SECDATA
	bool "Mock secdata for firmware verification"
	default n
	help
	  Enabling VBOOT_MOCK_SECDATA will mock secdata for the firmware
	  verification to avoid access to a secdata storage (typically TPM).
	  All operations for a secdata storage will be successful. This option
	  can be used during development when a TPM is not present or broken.
	  THIS SHOULD NOT BE LEFT ON FOR PRODUCTION DEVICES.

config VBOOT_DISABLE_DEV_ON_RECOVERY
	bool
	default n
	help
	  When this option is enabled, the Chrome OS device leaves the
	  developer mode as soon as recovery request is detected. This is
	  handy on embedded devices with limited input capabilities.

config VBOOT_SEPARATE_VERSTAGE
	bool
	default n
	depends on VBOOT_STARTS_IN_BOOTBLOCK
	help
	  If this option is set, vboot verification runs in a standalone stage
	  that is loaded from the bootblock and exits into romstage. If it is
	  not set, the verification code is linked directly into the bootblock
	  or the romstage and runs as part of that stage (cf. related options
	  VBOOT_STARTS_IN_BOOTBLOCK/_ROMSTAGE and VBOOT_RETURN_FROM_VERSTAGE).

config VBOOT_RETURN_FROM_VERSTAGE
	bool
	default n
	depends on VBOOT_SEPARATE_VERSTAGE
	help
	  If this is set, the verstage returns back to the calling stage instead
	  of exiting to the succeeding stage so that the verstage space can be
	  reused by the succeeding stage. This is useful if a RAM space is too
	  small to fit both the verstage and the succeeding stage.

config VBOOT_SAVE_RECOVERY_REASON_ON_REBOOT
	bool
	default n
	help
	  This option ensures that the recovery request is not lost because of
	  reboots caused after vboot verification is run. e.g. reboots caused by
	  FSP components on Intel platforms.

config VBOOT_MUST_REQUEST_DISPLAY
	bool
	default y if VGA_ROM_RUN
	default n
	help
	  Set this option to indicate to vboot that this platform will skip its
	  display initialization on a normal (non-recovery, non-developer) boot.
	  Unless display is specifically requested, the video option ROM is not
	  loaded, and any other native display initialization code is not run.

config VBOOT_HAS_REC_HASH_SPACE
	bool
	default n
	help
	  Set this option to indicate to vboot that recovery data hash space
	  is present in TPM.

config VBOOT_LID_SWITCH
	bool
	default n
	help
	  Whether this platform has a lid switch. If it does, vboot will not
	  decrement try counters for boot failures if the lid is closed.

config VBOOT_WIPEOUT_SUPPORTED
	bool
	default n
	help
	  When this option is enabled, the firmware provides the ability to
	  signal the application the need for factory reset (a.k.a. wipe
	  out) of the device

config VBOOT_FWID_MODEL
	string "Firmware ID model"
	default "Google_$(CONFIG_MAINBOARD_PART_NUMBER)" if CHROMEOS
	default "$(CONFIG_MAINBOARD_VENDOR)_$(CONFIG_MAINBOARD_PART_NUMBER)"
	help
	  This is the first part of the FWID written to various regions of a
	  vboot firmware image to identify its version.

config VBOOT_FWID_VERSION
	string "Firmware ID version"
	default ".$(KERNELVERSION)"
	help
	  This is the second part of the FWID written to various regions of a
	  vboot firmware image to identify its version.

config VBOOT_NO_BOARD_SUPPORT
	bool "Allow the use of vboot without board support"
	default n
	help
	  Enable weak functions for get_write_protect_state and
	  get_recovery_mode_switch in order to proceed with refactoring
	  of the vboot2 code base. Later on this code is removed and replaced
	  by interfaces.

config RO_REGION_ONLY
	string "Additional files that should not be copied to RW"
	default ""
	help
	  Add a space delimited list of filenames that should only be in the
	  RO section.

config RW_REGION_ONLY
	string
	default ""
	depends on VBOOT_SLOTS_RW_A
	help
	  Add a space delimited list of filenames that should only be in the
	  RW sections.

config VBOOT_ENABLE_CBFS_FALLBACK
	bool
	default n
	depends on VBOOT_SLOTS_RW_A
	help
	  When this option is enabled cbfs_boot_locate will look for a file in the RO
	  (COREBOOT) region if it isn't available in the active RW region.

menu "GBB configuration"

config GBB_HWID
	string "Hardware ID"
	default ""
	help
	  A hardware identifier for device. On Chrome OS this is used for auto
	  update and recovery, and will be generated when manufacturing by the
	  factory software, in a strictly defined format.
	  Leave empty to get a test-only Chrome OS HWID v2 string generated.

config GBB_BMPFV_FILE
	string "Path to bmpfv image"
	default ""

config GBB_FLAG_DEV_SCREEN_SHORT_DELAY
	bool "Reduce dev screen delay"
	default n

config GBB_FLAG_LOAD_OPTION_ROMS
	bool "Load option ROMs"
	default n

config GBB_FLAG_ENABLE_ALTERNATE_OS
	bool "Allow booting a non-Chrome OS kernel if dev switch is on"
	default n

config GBB_FLAG_FORCE_DEV_SWITCH_ON
	bool "Force dev switch on"
	default n

config GBB_FLAG_FORCE_DEV_BOOT_USB
	bool "Allow booting from USB in dev mode even if dev_boot_usb=0"
	default y

config GBB_FLAG_DISABLE_FW_ROLLBACK_CHECK
	bool "Disable firmware rollback protection"
	default y

config GBB_FLAG_ENTER_TRIGGERS_TONORM
	bool "Return to normal boot with Enter"
	default n

config GBB_FLAG_FORCE_DEV_BOOT_LEGACY
	bool "Allow booting to legacy in dev mode even if dev_boot_legacy=0"
	default n

config GBB_FLAG_FAFT_KEY_OVERIDE
	bool "Allow booting using alternative keys for FAFT servo testing"
	default n

config GBB_FLAG_DISABLE_EC_SOFTWARE_SYNC
	bool "Disable EC software sync"
	default n

config GBB_FLAG_DEFAULT_DEV_BOOT_LEGACY
	bool "Default to booting to legacy in dev mode"
	default n

config GBB_FLAG_DISABLE_PD_SOFTWARE_SYNC
	bool "Disable PD software sync"
	default n

config GBB_FLAG_DISABLE_LID_SHUTDOWN
	bool "Disable shutdown on closed lid"
	default n

config GBB_FLAG_FORCE_MANUAL_RECOVERY
	bool "Always assume manual recovery in recovery mode"
	default n

config GBB_FLAG_DISABLE_FWMP
	bool "Disable Firmware Management Parameters (FWMP)"
	default n

endmenu # GBB

menu "Vboot Keys"
config VBOOT_ROOT_KEY
	string "Root key (public)"
	default "$(VBOOT_SOURCE)/tests/devkeys/root_key.vbpubk"

config VBOOT_RECOVERY_KEY
	string "Recovery key (public)"
	default "$(VBOOT_SOURCE)/tests/devkeys/recovery_key.vbpubk"

config VBOOT_FIRMWARE_PRIVKEY
	string "Firmware key (private)"
	default "$(VBOOT_SOURCE)/tests/devkeys/firmware_data_key.vbprivk"

config VBOOT_KERNEL_KEY
	string "Kernel subkey (public)"
	default "$(VBOOT_SOURCE)/tests/devkeys/kernel_subkey.vbpubk"

config VBOOT_KEYBLOCK
	string "Keyblock to use for the RW regions"
	default "$(VBOOT_SOURCE)/tests/devkeys/firmware.keyblock"

config VBOOT_KEYBLOCK_VERSION
	int "Keyblock version number"
	default 1

config VBOOT_KEYBLOCK_PREAMBLE_FLAGS
	hex "Keyblock preamble flags"
	default 0x0

endmenu # Keys
endif # VBOOT
endmenu # Verified Boot (vboot)