u-boot.git/disk/part_efi.c, branch v2017.09

part: efi: Disable overlap check

2017-09-03T15:04:51+00:00

The current code checks that no partitions overlap with the GPT partition
table using the offset of the first LBA usable for that partition.

This works fine, unless you have a partition entry that is further away
than it usually is and you want to create partitions in the gap between the
GPT header and the GPT partition entries, for example to reflash a
bootloader that needs to be set there.

Rework the test to something a bit smarter that checks whether a partition
would overlap with either the GPT header or the partition entries, no
matter where it is on the disk.

Partitions that do not have a start LBA specified will still start at the
first LBA usable set in the GPT header, to avoid weird behaviours.

Signed-off-by: Maxime Ripard 
Reviewed-by: Tom Rini

part: efi: make gpt_fill_pte take the device descriptor

2017-09-03T15:04:51+00:00

The gpt_fill_pte will need to access the device block size. Let's pass the
device descriptor as an argument.

Signed-off-by: Maxime Ripard 
Reviewed-by: Tom Rini

part: efi: rework the partition start and size in gpt_fill_pte

2017-09-03T15:04:48+00:00

The start variable is only used inside a loop, and is never affected inside
it, so it's a purely local variable.

In the same way the partition size is accessed several times, so we can
store it in a variable.

Signed-off-by: Maxime Ripard 
Reviewed-by: Tom Rini

part: efi: Fix offset

2017-09-03T15:04:47+00:00

Both the config option and the DT options specify the offset to set the GPT
at in bytes, yet the code treats those values as block numbers.

Fix that.

Signed-off-by: Maxime Ripard 
Reviewed-by: Tom Rini 
Reviewed-by: Philipp Tomsich

GPT: add accessor function for disk GUID

2017-08-04T13:56:04+00:00

In order to read the GPT, modify the partition name strings, and then
write out a new GPT, the disk GUID is needed.  While there is an
existing accessor for the partition UUIDs, there is none yet for the
disk GUID.

Changes since v6: none.

Signed-off-by: Alison Chaiken

EFI: replace number with UUID_STR_LEN macro

2017-08-04T13:55:29+00:00

Changes since v6: none.

Signed-off-by: Alison Chaiken

part_efi: support padding between the GPT header and partition entries

2017-03-20T22:04:18+00:00

Some architectures require their SPL loader at a fixed address within
the first 16KB of the disk. To avoid an overlap with the partition
entries of the EFI partition table, the first safe offset (in bytes,
from the start of the device) for the entries can be set through
CONFIG_EFI_PARTITION_ENTRIES_OFF (via Kconfig)

When formatting a device with an EFI partition table, we may need to
leave a gap between the GPT header (always in LBA 1) and the partition
entries. The GPT header already contains a field to specify the
on-disk location, which has so far always been set to LBA 2. With this
change, a configurable offset will be translated into a LBA address
indicating where to put the entries.

Now also allows an override via device-tree using a config-node (see
doc/device-tree-bindings/config.txt for documentation).

Tested (exporting an internal MMC formatted with this) against Linux,
MacOS X and Windows.

Signed-off-by: Philipp Tomsich 
Reviewed-by: Simon Glass 
[trini: __maybe_unused on config_offset to avoid warning]
Signed-off-by: Tom Rini

gpt: Fix uuid string format

2017-03-17T18:15:10+00:00

Change GPT UUID string format from UUID to GUID per specification.

Signed-off-by: Vincent Tinelli 
Reviewed-by: Simon Glass

cmd: gpt: backup boot code before writing MBR

2017-02-08T20:56:29+00:00

On some cases the first 440 bytes of MBR are used to keep an additional
information for ROM boot loader. 'gpt write' command doesn't preserve
that area and makes boot code gone.

Preserve boot code area when run 'gpt write' command.

Signed-off-by: Vincent Tinelli 
Signed-off-by: Brennan Ashton 
Signed-off-by: Andy Shevchenko 
Reviewed-by: Simon Glass

cmd, disk: convert CONFIG_PARTITION_UUIDS, CMD_PART and CMD_GPT

2017-01-28T13:48:03+00:00

We convert CONFIG_PARTITION_UUIDS to Kconfig first.  But in order to cleanly
update all of the config files we must also update CMD_PART and CMD_GPT to also
be in Kconfig in order to avoid complex logic elsewhere to update all of the
config files.

Signed-off-by: Patrick Delaunay 
Signed-off-by: Patrick Delaunay 
Signed-off-by: Tom Rini