config AVB_LIBAVB_USER bool "Android AVB read/write hardware" help This config support the android things system to read/write hardware image, like vbmeta, misc, and so on. And it can provide some a/b and avb information to fastboot and kernel. config AVB_VBMETA_PUBLIC_KEY_VALIDATE bool "Support vbmeta public key validate" depends on AVB_LIBAVB_USER help support vbmeta public key validate. config SPL_AVB_LIBAVB_USER bool "Android AVB read/write hardware for spl" help This config support the android things system to read/write hardware image, like vbmeta, misc, and so on. And it can provide some a/b and avb information to fastboot and kernel. config TPL_AVB_LIBAVB_USER bool "Android AVB read/write hardware for tpl" help This config support the android things system to read/write hardware image, like vbmeta, misc, and so on. And it can provide some a/b and avb information to fastboot and kernel.