Change Log v5->v6:
Part1: No changes.
Part2: Update capsule-pstore.c file header.
Move the variable 'efi_capsule_pstore_info' backward (for removing some function declarations).
History:
The v5 was sent about two years ago [1]. At that time there was a concern about the EFI system table
entry 'CapsulePtr' as below: whether it was an array of capsules or an array of pointers to capsules.
typedef struct { UINT32 CapsuleArrayNumber; VOID* CapsulePtr[1]; } EFI_CAPSULE_TABLE;
The latest UEFI specification v2.8 [2] has a clarification in P268 for 'CapsulePtr' as below:
"CapsulePtr A pointer to an array of capsules that contain the same CapsuleGuid value.
Each CapsulePtr points to an instance of an EFI_CAPSULE_HEADER, with the capsule data
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
concatenated on its end."
^^^^^^^^^^^^^^^^^^^^^^^
According to the highlighted description above, the 'CapsulePtr' should be an array of pointers to capsules.
The capsule-pstore driver and the tested BIOS also use the 'CapsulePtr' as an array of pointers to capsules.
Test:
The v6 is well-tested on an Intel Kaby Lake client platform + BIOS(10/24/2016) and an Intel Ice Lake
client platform + BIOS(09/12/2019).
Reference:
[1] https://lore.kernel.org/linux-efi/?q=capsule-pstore
[2] https://uefi.org/sites/default/files/resources/UEFI_Spec_2_8_A_Feb14.pdf
Qiuxu Zhuo (2):
efi: Add 'nr_config_table' variable in efi structure
eif/capsule-pstore: Add capsule pstore backend
arch/x86/platform/efi/efi.c | 1 +
drivers/firmware/efi/Kconfig | 21 +
drivers/firmware/efi/Makefile | 1 +
drivers/firmware/efi/arm-init.c | 4 +-
drivers/firmware/efi/capsule-pstore.c | 692 ++++++++++++++++++++++++++
drivers/firmware/efi/efi.c | 1 +
include/linux/efi.h | 1 +
7 files changed, 720 insertions(+), 1 deletion(-)
create mode 100644 drivers/firmware/efi/capsule-pstore.c
--
2.17.1
