i.MX 8MM secure boot: The difference between "CONFIG_SECURE_BOOT" and "CONFIG_IMX_HAB"

[callme_friend]

I tried the Secure Boot of I.MX 8mm. When looking at the information, I saw "config_secure_boot" and "config_imx_hab", and there were Guide documents under U-Boot/DOC: doc/imx/ahab/  doc/imx/habv4/

What is the difference between HABv4 and aHAB?

Is there a more detailed explanation document?

[Dhruvit · Accepted solution]

Hi @callme_friend,

I hope you are doing well.

CONFIG_SECURE_BOOT option is replaced with CONFIG_IMX_HAB in the newer BSP using the below commit.

imx: replace CONFIG_SECURE_BOOT with CONFIG_IMX_HAB

HABv4 and AHAB are both different secure-boot concept.

AHAB is new secure-boot concept used in i.MX 8/8x/8ULP/9x family of applications processors

&

HABv4 is available in i.MX 50, i.MX 53, i.MX 6, i.MX 7 series and i.MX 8M family of applications processors

Please refer to the documents.

i.MX Secure Boot on HABv4 Supported Devices

Secure Boot on AHAB Supported Devices

Thanks & Regards,
Dhruvit Vasavada