Hi Igor,
On ven., févr. 09, 2024 at 11:14, Igor Opaniuk igor.opaniuk@gmail.com wrote:
Hi everyone,
I'm currently planning a big overhaul of the current implementation of AVB/AB in U-Boot during the 2024 year, which I have barely touched since 2019. I used to believe that it was stillborn, but looks like it's being actively used now by some SoC vendors and Google folks [1][2].
This is great news! I am not aware of any development related to the above but I'm looking forward to this.
I can't speak for all vendors but I know that TI uses both the AVB and AB implementation on their AM62x Android solution.
This is what I have in my todo list:
- Backport latest libavb from AOSP upstream and add support for Verified Boot 1.3.0 version
- Sync include/android_bootloader_message.h with AOSP upstream
- Check and backport fixes for AVB in AOSP U-Boot fork if needed [1]
- Get acquainted with a current state of A/B support in AOSP and backport all needed changes
- Re-factor libavb, switch to U-Boot existing implementation of rsa/sha256/sha512
- Add SHA512 implementation that leverage ARMv8 CE (pull it from Linux)
- Enable hw acceleration of SHA256/SHA512 that supports ARMv8 Crypto Extensions to speed up verification process on ARMv8-based boards.
- AVB support for NAND storage
I know that this has been send but I don't think Alistair has send any follow-up on this: https://patchwork.ozlabs.org/project/uboot/patch/20220926220211.868968-1-ade...
If someone is already working on anything from the above list - please feel free to reach out to me, so we can avoid duplication of effort.
Any comments/suggestions are welcome! Thanks!
From my understanding, the AOSP version of U-Boot has quite a different
bootflow since it relies on the (out-of-tree) boot_android command [3]
[3] https://android.googlesource.com/platform/external/u-boot/+/refs/heads/main/...
Please keep me in the loop with your progress. If you want, you can reach me on IRC as well (libera: #u-boot, nick: mkorpershoek)
[1] https://android.googlesource.com/platform/external/u-boot [2] https://source.android.com/docs/devices/cuttlefish/bootloader-dev [3] https://android.googlesource.com/platform/bootable/recovery/+/main/bootloade...
-- Best regards - Atentamente - Meilleures salutations
Igor Opaniuk
mailto: igor.opaniuk@gmail.com skype: igor.opanyuk http://ua.linkedin.com/in/iopaniuk