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26 lines
1.0 KiB
Plaintext
26 lines
1.0 KiB
Plaintext
menu "Bootloader Rollback"
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config BOOTLOADER_ANTI_ROLLBACK_ENABLE
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bool "Enable bootloader rollback support"
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depends on SOC_RECOVERY_BOOTLOADER_SUPPORTED
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default n
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help
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This option prevents rollback to previous bootloader image with lower security version.
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config BOOTLOADER_SECURE_VERSION
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int "Secure version of bootloader"
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depends on BOOTLOADER_ANTI_ROLLBACK_ENABLE
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default 0
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range 0 4
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help
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The secure version is the sequence number stored in the header of each bootloader.
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The ROM Bootloader which runs the 2nd stage bootloader (PRIMARY or RECOVERY) checks that
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the security version is greater or equal that recorded in the eFuse field.
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Bootloaders that have a secure version in the image < secure version in efuse will not boot.
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The security version is worth increasing if in previous versions there is
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a significant vulnerability and their use is not acceptable.
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endmenu
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