tree 8e3973f079261fbb97b962fcb308cac24617891a
parent ca66aac2893a068f0399295c336ff33d6dddcd40
author Bowgo Tsai <bowgotsai@google.com> 1554889086 +0800
committer Bowgo Tsai <bowgotsai@google.com> 1554951510 +0800

avb_ops: support reading from a logical partition

On some devices (e.g., emulator), init needs to read AVB footer from
a logical partition because:

   1) Dynamic/logical partition is enabled
   2) The partition is AVB chained, i.e., need to locate footer from the end
   3) Logical partition is not understandable by bootloader,
      but there is no bootloader in this case

Bug: 125540538
Bug: 128434470
Test: boot and force the fallback path, to check it can get logical path
Change-Id: Ie304bce234cbf0f938f386f7ce59235c851e0e2d