Re: [U-Boot] [PATCH 1/4] part: efi: Add a Kconfig option for the number of partition entries

On 28/11/17 10:34, Maxime Ripard wrote:

On some SoCs, the SPL needs to be located right in the middle of the GPT partition entries.

One way to work around that is to create partition entries for a smaller number of partitions to accomodate with where the SPL will be. Create a Kconfig option to allow to do that.

Signed-off-by: Maxime Ripard maxime.ripard@free-electrons.com

Reviewed-by: Andre Przywara andre.przywara@arm.com

Thanks, Andre.

---

disk/Kconfig | 13 +++++++++++++ include/part_efi.h | 2 +- 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/disk/Kconfig b/disk/Kconfig index 939656212065..f82beef6e689 100644 --- a/disk/Kconfig +++ b/disk/Kconfig @@ -78,6 +78,19 @@ config EFI_PARTITION common when EFI is the bootloader. Note 2TB partition limit; see disk/part_efi.c

+config EFI_PARTITION_ENTRIES_NUMBERS

• int "Number of the EFI partition entries"
• depends on EFI_PARTITION
• default 128
• help

•  Specify the number of partition entries in the GPT. This is
  

•  meant to allow less than the standard specifies for devices
  

•  that might need to place their first-stage bootloader in the
  

•  middle of a regular GPT.
  

•  If unsure, leave at 128 entries, which is the standard
  

•  number.
  

config EFI_PARTITION_ENTRIES_OFF int "Offset (in bytes) of the EFI partition entries" depends on EFI_PARTITION diff --git a/include/part_efi.h b/include/part_efi.h index 31e6bc6e140f..4c8f6cc473c8 100644 --- a/include/part_efi.h +++ b/include/part_efi.h @@ -27,7 +27,7 @@ #define GPT_HEADER_SIGNATURE 0x5452415020494645ULL #define GPT_HEADER_REVISION_V1 0x00010000 #define GPT_PRIMARY_PARTITION_TABLE_LBA 1ULL -#define GPT_ENTRY_NUMBERS 128 +#define GPT_ENTRY_NUMBERS CONFIG_EFI_PARTITION_ENTRIES_NUMBERS #define GPT_ENTRY_SIZE 128

#define PARTITION_SYSTEM_GUID \