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part: detect EFI system partition

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Up to now for MBR and GPT partitions the info field 'bootable' was set to 1
if either the partition was an EFI system partition or the bootable flag
was set.

Turn info field 'bootable' into a bit mask with separate bits for bootable
and EFI system partition.

This will allow us to identify the EFI system partition in the UEFI
sub-system.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2020-03-19 13:49:34 +01:00
parent 4fe050e65f
commit 25801acc1f
4 changed files with 32 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

16
disk/part_efi.c
View file

@ -71,11 +71,15 @@ static char *print_efiname(gpt_entry *pte)
static const efi_guid_t system_guid = PARTITION_SYSTEM_GUID;
static inline int is_bootable(gpt_entry *p)
static int get_bootable(gpt_entry *p)
{
return p->attributes.fields.legacy_bios_bootable ||
!memcmp(&(p->partition_type_guid), &system_guid,
sizeof(efi_guid_t));
int ret = 0;
if (!memcmp(&p->partition_type_guid, &system_guid, sizeof(efi_guid_t)))
ret |= PART_EFI_SYSTEM_PARTITION;
if (p->attributes.fields.legacy_bios_bootable)
ret |= PART_BOOTABLE;
return ret;
}
static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba,
@ -286,7 +290,7 @@ int part_get_info_efi(struct blk_desc *dev_desc, int part,
snprintf((char *)info->name, sizeof(info->name), "%s",
print_efiname(&gpt_pte[part - 1]));
strcpy((char *)info->type, "U-Boot");
info->bootable = is_bootable(&gpt_pte[part - 1]);
info->bootable = get_bootable(&gpt_pte[part - 1]);
#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
UUID_STR_FORMAT_GUID);
@ -501,7 +505,7 @@ int gpt_fill_pte(struct blk_desc *dev_desc,
memset(&gpt_e[i].attributes, 0,
sizeof(gpt_entry_attributes));
if (partitions[i].bootable)
if (partitions[i].bootable & PART_BOOTABLE)
gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
/* partition name */