On Wed, Feb 19, 2020 at 07:23:39PM +0300, Dmitry Osipenko wrote: > The gpt_sector=<sector> causes the GPT partition search to look at the > specified sector for a valid GPT header if the GPT is not found at the > beginning or the end of block device. > > In particular this is needed for NVIDIA Tegra consumer-grade Android > devices in order to make them usable with the upstream kernel because > these devices use a proprietary / closed-source partition table format > for the EMMC and it's impossible to change the partition's format. Luckily > there is a GPT table in addition to the proprietary table, which is placed > in uncommon location of the EMMC storage and bootloader passes the > location to kernel using "gpt gpt_sector=<sector>" cmdline parameters. > > This patch is based on the original work done by Colin Cross for the > downstream Android kernel. I don't think a magic command line is the way to go. The best would be to reverse-engineer the proprietary partition table format. If that is too hard we can at least key off the odd GPT location based of it's magic number.
