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David Vincze03368b82020-04-01 12:53:53 +02001# Copyright (c) 2017-2020 Linaro Limited
David Vinczec3084132020-02-18 14:50:47 +01002# Copyright (c) 2020 Arm Limited
Andrzej Puzdrowski64ad0922017-09-22 11:33:41 +02003#
4# SPDX-License-Identifier: Apache-2.0
5#
6
Marti Bolivar0e091c92018-04-12 11:23:16 -04007mainmenu "MCUboot configuration"
Andrzej Puzdrowski64ad0922017-09-22 11:33:41 +02008
Marti Bolivar0e091c92018-04-12 11:23:16 -04009comment "MCUboot-specific configuration options"
Andrzej Puzdrowski64ad0922017-09-22 11:33:41 +020010
Emanuele Di Santo865777d2018-11-08 11:28:15 +010011# Hidden option to mark a project as MCUboot
12config MCUBOOT
13 default y
14 bool
Rajavardhan Gundi07ba28f2018-12-10 15:44:48 +053015 select MPU_ALLOW_FLASH_WRITE if ARM_MPU
Marcin Niestrojc6be76a2020-03-22 14:39:35 +010016 select USE_DT_CODE_PARTITION if HAS_FLASH_LOAD_OFFSET
Emanuele Di Santo865777d2018-11-08 11:28:15 +010017
Marti Bolivarbc2fa4e2018-04-12 12:18:32 -040018config BOOT_USE_MBEDTLS
19 bool
20 # Hidden option
21 default n
22 help
23 Use mbedTLS for crypto primitives.
24
25config BOOT_USE_TINYCRYPT
26 bool
27 # Hidden option
28 default n
Sebastian Bøe913a3852019-01-22 13:53:12 +010029 # When building for ECDSA, we use our own copy of mbedTLS, so the
30 # Zephyr one must not be enabled or the MBEDTLS_CONFIG_FILE macros
31 # will collide.
32 depends on ! MBEDTLS
Marti Bolivarbc2fa4e2018-04-12 12:18:32 -040033 help
34 Use TinyCrypt for crypto primitives.
35
Sigvart Hovlandebd05032019-03-21 10:47:32 +010036config BOOT_USE_CC310
37 bool
38 # Hidden option
39 default n
40 # When building for ECDSA, we use our own copy of mbedTLS, so the
41 # Zephyr one must not be enabled or the MBEDTLS_CONFIG_FILE macros
42 # will collide.
43 depends on ! MBEDTLS
44 help
45 Use cc310 for crypto primitives.
46
47config BOOT_USE_NRF_CC310_BL
48 bool
49 default n
50
51config NRFXLIB_CRYPTO
52 bool
53 default n
54
55config NRF_CC310_BL
56 bool
57 default n
58
Andrzej Puzdrowski97543282018-04-12 15:16:56 +020059menu "MCUBoot settings"
60
Dominik Ermel4dc3f442020-05-26 08:45:14 +000061config SINGLE_IMAGE_DFU
62 bool "Single image application"
63 default n
64 help
65 Single image area is used for application which means that
66 uploading a new application overwrites the one that previously
67 occupied the area.
68
Marti Bolivarbc2fa4e2018-04-12 12:18:32 -040069choice
70 prompt "Signature type"
71 default BOOT_SIGNATURE_TYPE_RSA
72
Arvin Farahmandfb5ec182020-05-05 11:44:12 -040073config BOOT_SIGNATURE_TYPE_NONE
74 bool "No signature; use only hash check"
75 select BOOT_USE_TINYCRYPT
76
Marti Bolivarbc2fa4e2018-04-12 12:18:32 -040077config BOOT_SIGNATURE_TYPE_RSA
78 bool "RSA signatures"
79 select BOOT_USE_MBEDTLS
Marti Bolivara4818a52018-04-12 13:02:38 -040080 select MBEDTLS
Marti Bolivarbc2fa4e2018-04-12 12:18:32 -040081
Fabio Utzig105b59a2019-05-13 15:08:12 -070082if BOOT_SIGNATURE_TYPE_RSA
83config BOOT_SIGNATURE_TYPE_RSA_LEN
84 int "RSA signature length"
85 range 2048 3072
86 default 2048
87endif
88
Marti Bolivarbc2fa4e2018-04-12 12:18:32 -040089config BOOT_SIGNATURE_TYPE_ECDSA_P256
90 bool "Elliptic curve digital signatures with curve P-256"
Marti Bolivarbc2fa4e2018-04-12 12:18:32 -040091
Sigvart Hovlandebd05032019-03-21 10:47:32 +010092if BOOT_SIGNATURE_TYPE_ECDSA_P256
93choice
94 prompt "Ecdsa implementation"
Fabio Utzig34e93a52020-02-03 09:59:53 -030095 default BOOT_ECDSA_TINYCRYPT
96config BOOT_ECDSA_TINYCRYPT
Sigvart Hovlandebd05032019-03-21 10:47:32 +010097 bool "Use tinycrypt"
98 select BOOT_USE_TINYCRYPT
99config BOOT_CC310
100 bool "Use CC310"
101 select BOOT_USE_NRF_CC310_BL if HAS_HW_NRF_CC310
102 select NRF_CC310_BL if HAS_HW_NRF_CC310
103 select NRFXLIB_CRYPTO if SOC_FAMILY_NRF
104 select BOOT_USE_CC310
105endchoice
106endif
Fabio Utzig34e93a52020-02-03 09:59:53 -0300107
108config BOOT_SIGNATURE_TYPE_ED25519
109 bool "Edwards curve digital signatures using ed25519"
110
111if BOOT_SIGNATURE_TYPE_ED25519
112choice
113 prompt "Ecdsa implementation"
114 default BOOT_ED25519_TINYCRYPT
115config BOOT_ED25519_TINYCRYPT
116 bool "Use tinycrypt"
117 select BOOT_USE_TINYCRYPT
118config BOOT_ED25519_MBEDTLS
119 bool "Use mbedTLS"
120 select BOOT_USE_MBEDTLS
121 select MBEDTLS
122endchoice
123endif
124
Marti Bolivarbc2fa4e2018-04-12 12:18:32 -0400125endchoice
126
Fabio Utzigc690c762018-04-26 10:51:09 -0300127config BOOT_SIGNATURE_KEY_FILE
128 string "PEM key file"
129 default ""
130 help
Marek Pietabdcfc852020-08-04 02:22:55 -0700131 You can use either absolute or relative path.
132 In case relative path is used, the build system assumes that it starts
133 from the directory where the MCUBoot KConfig configuration file is
134 located. If the key file is not there, the build system uses relative
135 path that starts from the MCUBoot repository root directory.
Fabio Utzigc690c762018-04-26 10:51:09 -0300136 The key file will be parsed by imgtool's getpub command and a .c source
137 with the public key information will be written in a format expected by
138 MCUboot.
139
Andrzej Puzdrowski9a605b62020-03-16 13:34:30 +0100140config MCUBOOT_CLEANUP_ARM_CORE
141 bool "Perform core cleanup before chain-load the application"
142 depends on CPU_CORTEX_M
143 default y
144
Marti Bolivara4818a52018-04-12 13:02:38 -0400145config MBEDTLS_CFG_FILE
146 default "mcuboot-mbedtls-cfg.h"
147
David Vincze03368b82020-04-01 12:53:53 +0200148config BOOT_HW_KEY
149 bool "Use HW key for image verification"
150 default n
151 help
152 Use HW key for image verification, otherwise the public key is embedded
153 in MCUBoot. If enabled the public key is appended to the signed image
154 and requires the hash of the public key to be provisioned to the device
155 beforehand.
156
Marti Bolivarbc2fa4e2018-04-12 12:18:32 -0400157config BOOT_VALIDATE_SLOT0
David Vincze2d736ad2019-02-18 11:50:22 +0100158 bool "Validate image in the primary slot on every boot"
Marti Bolivarbc2fa4e2018-04-12 12:18:32 -0400159 default y
160 help
David Vincze2d736ad2019-02-18 11:50:22 +0100161 If y, the bootloader attempts to validate the signature of the
162 primary slot every boot. This adds the signature check time to
Marti Bolivarbc2fa4e2018-04-12 12:18:32 -0400163 every boot, but can mitigate against some changes that are
164 able to modify the flash image itself.
165
Dominik Ermel4dc3f442020-05-26 08:45:14 +0000166if !SINGLE_IMAGE_DFU
Marti Bolivarbc2fa4e2018-04-12 12:18:32 -0400167config BOOT_UPGRADE_ONLY
168 bool "Overwrite image updates instead of swapping"
169 default n
170 help
David Vincze2d736ad2019-02-18 11:50:22 +0100171 If y, overwrite the primary slot with the upgrade image instead
172 of swapping them. This prevents the fallback recovery, but
Marti Bolivarbc2fa4e2018-04-12 12:18:32 -0400173 uses a much simpler code path.
174
Fabio Utzigc58842e2019-11-28 10:30:01 -0300175config BOOT_SWAP_USING_MOVE
Fabio Utzigdd2b6802020-01-06 09:10:45 -0300176 bool "Swap mode that can run without a scratch partition"
Håkon Øye Amundsen09be7832020-01-24 14:34:49 +0000177 default y if SOC_FAMILY_NRF
Fabio Utzigc58842e2019-11-28 10:30:01 -0300178 default n
179 help
180 If y, the swap upgrade is done in two steps, where first every
181 sector of the primary slot is moved up one sector, then for
182 each sector X in the secondary slot, it is moved to index X in
183 the primary slot, then the sector at X+1 in the primary is
184 moved to index X in the secondary.
185 This allows a swap upgrade without using a scratch partition,
186 but is currently limited to all sectors in both slots being of
187 the same size.
Dominik Ermel4dc3f442020-05-26 08:45:14 +0000188endif
Fabio Utzigc58842e2019-11-28 10:30:01 -0300189
Dominik Ermel4dc3f442020-05-26 08:45:14 +0000190if !SINGLE_IMAGE_DFU
Fabio Utzigd0533ed2018-12-19 07:56:33 -0200191config BOOT_BOOTSTRAP
Sam Bristowd0ca0ff2019-10-30 20:51:35 +1300192 bool "Bootstrap erased the primary slot from the secondary slot"
Fabio Utzigd0533ed2018-12-19 07:56:33 -0200193 default n
194 help
195 If y, enables bootstraping support. Bootstrapping allows an erased
David Vincze2d736ad2019-02-18 11:50:22 +0100196 primary slot to be initialized from a valid image in the secondary slot.
Fabio Utzigd0533ed2018-12-19 07:56:33 -0200197 If unsure, leave at the default value.
198
Fabio Utzigca8ead22019-12-20 07:06:04 -0300199config BOOT_SWAP_SAVE_ENCTLV
200 bool "Save encrypted key TLVs instead of plaintext keys in swap metadata"
201 default n
202 help
203 If y, instead of saving the encrypted image keys in plaintext in the
204 swap resume metadata, save the encrypted image TLVs. This should be used
205 when there is no security mechanism protecting the data in the primary
206 slot from being dumped. If n is selected (default), the keys are written
207 after being decrypted from the image TLVs and could be read by an
208 attacker who has access to the flash contents of the primary slot (eg
209 JTAG/SWD or primary slot in external flash).
210 If unsure, leave at the default value.
211
Fabio Utzig5fe874c2018-08-31 07:41:50 -0300212config BOOT_ENCRYPT_RSA
Fabio Utzig42cc29a2019-11-05 07:54:41 -0300213 bool "Support for encrypted upgrade images using RSA"
Fabio Utzig5fe874c2018-08-31 07:41:50 -0300214 default n
215 help
David Vincze2d736ad2019-02-18 11:50:22 +0100216 If y, images in the secondary slot can be encrypted and are decrypted
217 on the fly when upgrading to the primary slot, as well as encrypted
Fabio Utzig42cc29a2019-11-05 07:54:41 -0300218 back when swapping from the primary slot to the secondary slot. The
219 encryption mechanism used in this case is RSA-OAEP (2048 bits).
220
221config BOOT_ENCRYPT_EC256
222 bool "Support for encrypted upgrade images using ECIES-P256"
223 default n
224 help
225 If y, images in the secondary slot can be encrypted and are decrypted
226 on the fly when upgrading to the primary slot, as well as encrypted
227 back when swapping from the primary slot to the secondary slot. The
228 encryption mechanism used in this case is ECIES using primitives
229 described under "ECIES-P256 encryption" in docs/encrypted_images.md.
Fabio Utzig5fe874c2018-08-31 07:41:50 -0300230
Fabio Utzigb6f014c2020-04-02 13:25:01 -0300231config BOOT_ENCRYPT_X25519
232 bool "Support for encrypted upgrade images using ECIES-X25519"
233 default n
234 help
235 If y, images in the secondary slot can be encrypted and are decrypted
236 on the fly when upgrading to the primary slot, as well as encrypted
237 back when swapping from the primary slot to the secondary slot. The
238 encryption mechanism used in this case is ECIES using primitives
239 described under "ECIES-X25519 encryption" in docs/encrypted_images.md.
Dominik Ermel4dc3f442020-05-26 08:45:14 +0000240endif
Fabio Utzigb6f014c2020-04-02 13:25:01 -0300241
Marti Bolivar0e091c92018-04-12 11:23:16 -0400242config BOOT_MAX_IMG_SECTORS
243 int "Maximum number of sectors per image slot"
244 default 128
245 help
246 This option controls the maximum number of sectors that each of
247 the two image areas can contain. Smaller values reduce MCUboot's
248 memory usage; larger values allow it to support larger images.
249 If unsure, leave at the default value.
250
Emanuele Di Santo205c8c62018-07-20 11:42:31 +0200251config BOOT_ERASE_PROGRESSIVELY
252 bool "Erase flash progressively when receiving new firmware"
253 default y if SOC_NRF52840
254 help
255 If enabled, flash is erased as necessary when receiving new firmware,
256 instead of erasing the whole image slot at once. This is necessary
257 on some hardware that has long erase times, to prevent long wait
258 times at the beginning of the DFU process.
259
David Vincze1cf11b52020-03-24 07:51:09 +0100260config MEASURED_BOOT
261 bool "Store the boot state/measurements in shared memory"
262 default n
263 help
264 If enabled, the bootloader will store certain boot measurements such as
265 the hash of the firmware image in a shared memory area. This data can
266 be used later by runtime services (e.g. by a device attestation service).
267
268config BOOT_SHARE_DATA
269 bool "Save application specific data in shared memory area"
270 default n
271
Rajavardhan Gundi51c9d702019-02-20 14:08:52 +0530272config BOOT_WAIT_FOR_USB_DFU
273 bool "Wait for a prescribed duration to see if USB DFU is invoked"
274 default n
275 select USB
276 select USB_DFU_CLASS
277 select IMG_MANAGER
278 help
279 If y, MCUboot waits for a prescribed duration of time to allow
280 for USB DFU to be invoked. Please note DFU always updates the
281 slot1 image.
282
Marti Bolivarbc2fa4e2018-04-12 12:18:32 -0400283config ZEPHYR_TRY_MASS_ERASE
284 bool "Try to mass erase flash when flashing MCUboot image"
285 default y
286 help
287 If y, attempt to configure the Zephyr build system's "flash"
288 target to mass-erase the flash device before flashing the
289 MCUboot image. This ensures the scratch and other partitions
290 are in a consistent state.
291
292 This is not available for all targets.
293
David Brownf6d14c22019-12-10 15:36:36 -0700294config BOOT_USE_BENCH
295 bool "Enable benchmark code"
296 default n
297 help
298 If y, adds support for simple benchmarking that can record
299 time intervals between two calls. The time printed depends
300 on the particular Zephyr target, and is generally ticks of a
301 specific board-specific timer.
302
Michael Scott74ceae52019-02-01 14:01:09 -0800303module = MCUBOOT
Piotr Mienkowski15aa6ef2019-04-08 22:48:15 +0200304module-str = MCUBoot bootloader
Michael Scott74ceae52019-02-01 14:01:09 -0800305source "subsys/logging/Kconfig.template.log_config"
Michael Scott74ceae52019-02-01 14:01:09 -0800306
Andrzej Puzdrowskiaf148532020-02-25 12:51:26 +0100307config MCUBOOT_LOG_THREAD_STACK_SIZE
308 int "Stack size for the MCUBoot log processing thread"
309 depends on LOG && !LOG_IMMEDIATE
310 default 2048 if COVERAGE_GCOV
311 default 1024 if NO_OPTIMIZATIONS
312 default 1024 if XTENSA
313 default 4096 if (X86 && X86_64)
314 default 4096 if ARM64
315 default 768
316 help
317 Set the internal stack size for MCUBoot log processing thread.
318
Marti Bolivar0e091c92018-04-12 11:23:16 -0400319menuconfig MCUBOOT_SERIAL
320 bool "MCUboot serial recovery"
321 default n
322 select REBOOT
Emanuele Di Santo30a92652019-01-16 14:01:08 +0100323 select GPIO
Marti Bolivar0e091c92018-04-12 11:23:16 -0400324 select SERIAL
Emanuele Di Santo30a92652019-01-16 14:01:08 +0100325 select UART_INTERRUPT_DRIVEN
Marti Bolivar0e091c92018-04-12 11:23:16 -0400326 select BASE64
327 select TINYCBOR
328 help
329 If y, enables a serial-port based update mode. This allows
330 MCUboot itself to load update images into flash over a UART.
331 If unsure, leave at the default value.
332
333if MCUBOOT_SERIAL
334
Emanuele Di Santoc4bf7802018-07-20 11:39:57 +0200335choice
336 prompt "Serial device"
Andrzej Puzdrowskif4a9a9d2020-04-24 12:31:51 +0200337 default BOOT_SERIAL_UART if !BOARD_NRF52840DONGLE_NRF52840
338 default BOOT_SERIAL_CDC_ACM if BOARD_NRF52840DONGLE_NRF52840
Emanuele Di Santoc4bf7802018-07-20 11:39:57 +0200339
340config BOOT_SERIAL_UART
341 bool "UART"
342 # SERIAL and UART_INTERRUPT_DRIVEN already selected
343
344config BOOT_SERIAL_CDC_ACM
345 bool "CDC ACM"
346 select USB
347 select USB_DEVICE_STACK
348 select USB_CDC_ACM
349
350endchoice
351
Marti Bolivar0e091c92018-04-12 11:23:16 -0400352config BOOT_MAX_LINE_INPUT_LEN
353 int "Maximum command line length"
354 default 512
355 help
356 Maximum length of commands transported over the serial port.
357
358config BOOT_SERIAL_DETECT_PORT
359 string "GPIO device to trigger serial recovery mode"
360 default GPIO_0 if SOC_FAMILY_NRF
361 help
362 Zephyr GPIO device which contains the pin used to trigger
363 serial recovery mode.
364
365config BOOT_SERIAL_DETECT_PIN
366 int "Pin to trigger serial recovery mode"
Andrzej Puzdrowskif4a9a9d2020-04-24 12:31:51 +0200367 default 6 if BOARD_NRF9160DK_NRF9160
Andrzej Puzdrowskifefdea22020-03-27 09:41:14 +0100368 default 11 if BOARD_NRF52840DK_NRF52840
Andrzej Puzdrowskif4a9a9d2020-04-24 12:31:51 +0200369 default 13 if BOARD_NRF52DK_NRF52832
Håkon Øye Amundsen6fc25952020-01-02 15:15:42 +0000370 default 23 if BOARD_NRF5340_DK_NRF5340_CPUAPP || BOARD_NRF5340_DK_NRF5340_CPUAPPNS
Marti Bolivar0e091c92018-04-12 11:23:16 -0400371 help
372 Pin on the serial detect port which triggers serial recovery mode.
373
374config BOOT_SERIAL_DETECT_PIN_VAL
375 int "Serial detect pin trigger value"
376 default 0
377 range 0 1
378 help
379 Logic value of the detect pin which triggers serial recovery
380 mode.
381
Andrzej Puzdrowskif0004802019-10-01 14:13:35 +0200382# Workaround for not being able to have commas in macro arguments
383DT_CHOSEN_Z_CONSOLE := zephyr,console
384
385config RECOVERY_UART_DEV_NAME
386 string "UART Device Name for Recovery UART"
387 default "$(dt_chosen_label,$(DT_CHOSEN_Z_CONSOLE))" if HAS_DTS
388 default "UART_0"
389 depends on BOOT_SERIAL_UART
390 help
391 This option specifies the name of UART device to be used for
392 serial recovery.
393
Marti Bolivar0e091c92018-04-12 11:23:16 -0400394endif # MCUBOOT_SERIAL
Andrzej Puzdrowski64ad0922017-09-22 11:33:41 +0200395
Rafał Kuźniad854bb62020-06-17 15:06:47 +0200396config BOOT_INTR_VEC_RELOC
397 bool "Relocate the interrupt vector to the application"
398 default n
399 depends on SW_VECTOR_RELAY || CPU_CORTEX_M_HAS_VTOR
400 help
401 Relocate the interrupt vector to the application before it is started.
402 Select this option if application requires vector relocation,
403 but it doesn't relocate vector in its reset handler.
404
Andrzej Puzdrowski16b6d152020-06-01 14:16:54 +0200405config UPDATEABLE_IMAGE_NUMBER
406 int "Number of updateable images"
407 default 1
Dominik Ermel4dc3f442020-05-26 08:45:14 +0000408 range 1 1 if SINGLE_IMAGE_DFU
Andrzej Puzdrowski16b6d152020-06-01 14:16:54 +0200409 help
410 Enables support of multi image update.
411
412choice
413 prompt "Downgrade prevention"
414 optional
415
416config MCUBOOT_DOWNGRADE_PREVENTION
417 bool "SW based downgrade prevention"
418 depends on BOOT_UPGRADE_ONLY
419 help
420 Prevent downgrades by enforcing incrementing version numbers.
421 When this option is set, any upgrade must have greater major version
422 or greater minor version with equal major version. This mechanism
423 only protects against some attacks against version downgrades (for
424 example, a JTAG could be used to write an older version).
425
426config MCUBOOT_HW_DOWNGRADE_PREVENTION
427 bool "HW based downgrade prevention"
428 help
429 Prevent undesirable/malicious software downgrades. When this option is
430 set, any upgrade must have greater or equal security counter value.
431 Because of the acceptance of equal values it allows for software
432 downgrade to some extent.
433
434endchoice
435
Andrzej Puzdrowski97543282018-04-12 15:16:56 +0200436endmenu
437
Carles Cufi84ede582018-01-29 15:12:00 +0100438config MCUBOOT_DEVICE_SETTINGS
439 # Hidden selector for device-specific settings
440 bool
441 default y
442 # CPU options
443 select MCUBOOT_DEVICE_CPU_CORTEX_M0 if CPU_CORTEX_M0
Carles Cufi67c792e2018-01-29 15:14:31 +0100444 # Enable flash page layout if available
445 select FLASH_PAGE_LAYOUT if FLASH_HAS_PAGE_LAYOUT
Andrzej Puzdrowskib788c712018-04-12 12:42:49 +0200446 # Enable flash_map module as flash I/O back-end
447 select FLASH_MAP
Carles Cufi84ede582018-01-29 15:12:00 +0100448
449config MCUBOOT_DEVICE_CPU_CORTEX_M0
450 # Hidden selector for Cortex-M0 settings
451 bool
452 default n
453 select SW_VECTOR_RELAY if !CPU_CORTEX_M0_HAS_VECTOR_TABLE_REMAP
454
Marti Bolivar0e091c92018-04-12 11:23:16 -0400455comment "Zephyr configuration options"
Andrzej Puzdrowski64ad0922017-09-22 11:33:41 +0200456
Marti Bolivarf84cc4b2019-08-20 16:06:56 -0700457# Disabling MULTITHREADING provides a code size advantage, but
458# it requires peripheral drivers (particularly a flash driver)
459# that works properly with the option enabled.
460#
461# If you know for sure that your hardware will work, you can default
462# it to n here. Otherwise, having it on by default makes the most
463# hardware work.
464config MULTITHREADING
Andrzej Puzdrowski9a4946c2020-02-20 12:39:12 +0100465 default y if BOOT_SERIAL_CDC_ACM #usb driver requires MULTITHREADING
Marti Bolivarf84cc4b2019-08-20 16:06:56 -0700466 default n if SOC_FAMILY_NRF
467 default y
468
Andrzej Puzdrowski9a4946c2020-02-20 12:39:12 +0100469config LOG_IMMEDIATE
470 default n if MULTITHREADING
Andrzej Puzdrowski3f092bd2020-02-17 13:25:32 +0100471 default y
472
473config LOG_PROCESS_THREAD
474 default n # mcuboot has its own log processing thread
475
476# override USB device name
477config USB_DEVICE_PRODUCT
478 default "MCUBOOT"
Andrzej Puzdrowski9a4946c2020-02-20 12:39:12 +0100479
Robert Lubos1b19d2a2020-01-31 14:05:35 +0100480source "Kconfig.zephyr"