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disk: expose partition type flags

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GPT partition tables include two bytes worth of vendor defined
attributes, per partition. ChromeOS and Qualcomm both use these (with
different encoding!) to handle A/B slot switching with a retry counter.

Expose these via the disk_partition struct so that they can be parsed by
the relevant board code.

This will be used on Qualcomm boards to determine which slot we're
booting on so that we can flash capsule updates to the correct one.

Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
This commit is contained in:
Caleb Connolly 2024-10-12 15:57:18 +02:00
parent ef14c347db
commit eab4675f93
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2 changed files with 2 additions and 0 deletions
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1
disk/part_efi.c
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@ -292,6 +292,7 @@ static int __maybe_unused part_get_info_efi(struct blk_desc *desc, int part,
print_efiname(&gpt_pte[part - 1]));
strcpy((char *)info->type, "U-Boot");
info->bootable = get_bootable(&gpt_pte[part - 1]);
info->type_flags = gpt_pte[part - 1].attributes.fields.type_guid_specific;
if (CONFIG_IS_ENABLED(PARTITION_UUIDS)) {
uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b,
(char *)disk_partition_uuid(info),

1
include/part.h
View file

@ -74,6 +74,7 @@ struct disk_partition {
* PART_EFI_SYSTEM_PARTITION the partition is an EFI system partition
*/
int bootable;
u16 type_flags; /* top 16 bits of GPT partition attributes */
#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
char uuid[UUID_STR_LEN + 1]; /* filesystem UUID as string, if exists */
#endif