[U-Boot] [PATCH 0/3] add support for GPT partition name manipulation

Tom Rini
2017-05-26T12:38:45Z

On Sat, May 20, 2017 at 07:27:52PM -0700, alison at peloton-tech.com wrote:

> From: Alison Chaiken <alison@she-devel.com>
>
> One way for userspace and the bootloader to exchange information about
> dynamic image selection is via the storage device partition table, as
> described at
>
> https://source.android.com/devices/tech/ota/ab_updates
>
> The scheme described there relies on setting partitions' "boot" flag.
> When no partition on a device is bootable since the kernel and U-Boot
> are stored elsewhere, the name field in the GPT partition table offers
> another logical place to store information. These patches allow users
> to easily modify GPT partition names via bootscripts that can select
> different images based on a boot-failure counter, or when userspace
> installs a software update.
>
> These patches have been tested on a TI DRA7xx-based SOM with U-Boot
> 2015.07. The storage device is an eMMC.
>
> Alison Chaiken (3):
> GPT: add accessor function for disk GUID
> GPT: read partition table from device into a data structure
> rename GPT partitions to detect boot failure
>
> cmd/gpt.c | 339 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
> disk/part_efi.c | 31 ++++++
> include/part.h | 24 ++++
> 3 files changed, 392 insertions(+), 2 deletions(-)

Interesting. Adding Lukasz for comments as well. I was thinking
perhaps the final patch in the series might want to be guarded with some
Kconfig option as it's rather specific to this update mechanism and
probably causes a noticeable size increase due to the strings. Thanks!

--
Tom
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