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Subject[PATCH 3/5] partitions/efi: add support for uImage.FIT sub-partitions
Add new GUID allowing to parse uImage.FIT stored in a GPT partition
and map filesystem sub-image as sub-partitions.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
block/partitions/efi.c | 6 ++++++
block/partitions/efi.h | 3 +++
2 files changed, 9 insertions(+)

diff --git a/block/partitions/efi.c b/block/partitions/efi.c
index 5e9be13a56a82a..b8a88601ff5780 100644
--- a/block/partitions/efi.c
+++ b/block/partitions/efi.c
@@ -716,6 +716,7 @@ int efi_partition(struct parsed_partitions *state)
gpt_entry *ptes = NULL;
u32 i;
unsigned ssz = queue_logical_block_size(state->disk->queue) / 512;
+ u32 extra_slot = 64;

if (!find_valid_gpt(state, &gpt, &ptes) || !gpt || !ptes) {
kfree(gpt);
@@ -749,6 +750,11 @@ int efi_partition(struct parsed_partitions *state)
ARRAY_SIZE(ptes[i].partition_name));
utf16_le_to_7bit(ptes[i].partition_name, label_max, info->volname);
state->parts[i + 1].has_info = true;
+ /* If this is a U-Boot FIT volume it may have subpartitions */
+ if (IS_ENABLED(CONFIG_FIT_PARTITION) &&
+ !efi_guidcmp(ptes[i].partition_type_guid, PARTITION_LINUX_FIT_GUID))
+ (void) parse_fit_partitions(state, start * ssz, size * ssz,
+ &extra_slot, 127, 1);
}
kfree(ptes);
kfree(gpt);
diff --git a/block/partitions/efi.h b/block/partitions/efi.h
index 84b9f36b9e4797..06c11f6ae3989c 100644
--- a/block/partitions/efi.h
+++ b/block/partitions/efi.h
@@ -51,6 +51,9 @@
#define PARTITION_LINUX_LVM_GUID \
EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \
0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28)
+#define PARTITION_LINUX_FIT_GUID \
+ EFI_GUID( 0xcae9be83, 0xb15f, 0x49cc, \
+ 0x86, 0x3f, 0x08, 0x1b, 0x74, 0x4a, 0x2d, 0x93)

typedef struct _gpt_header {
__le64 signature;
--
2.36.0
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