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arch/risc-v: flash encryption support for ESP32-C3|C6|H2

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Add Kconfig option to enable flash encryption.
Default E-Fuse state is now VIRTUAL.
Modifies SPI Flash driver for encrypted operation.
Limitations:
- Requires MCUBoot
- Flash fully encrypted (no unencrypted MTD part. support)

Signed-off-by: Filipe Cavalcanti <filipe.cavalcanti@espressif.com>
This commit is contained in:
Filipe Cavalcanti
2025-09-04 13:18:33 -03:00
committed by simbit18
parent 846f86e011
commit 0835b345e8
6 changed files with 562 additions and 26 deletions
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tools/espressif/Config.mk
+4
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@@ -101,7 +101,11 @@ ifeq ($(CONFIG_ESPRESSIF_BOOTLOADER_MCUBOOT),y)
APP_IMAGE := nuttx.bin
FLASH_APP := $(APP_OFFSET) $(APP_IMAGE)
ifeq ($(CONFIG_ESPRESSIF_SECURE_FLASH_ENC_ENABLED),y)
IMGTOOL_ALIGN_ARGS := --align 32 --max-align 32
else
IMGTOOL_ALIGN_ARGS := --align 4
endif
IMGTOOL_SIGN_ARGS := --pad $(VERIFIED) $(IMGTOOL_ALIGN_ARGS) -v $(CONFIG_ESPRESSIF_MCUBOOT_SIGN_IMAGE_VERSION) -s auto \
-H $(CONFIG_ESPRESSIF_APP_MCUBOOT_HEADER_SIZE) --pad-header \
-S $(CONFIG_ESPRESSIF_OTA_SLOT_SIZE)