This series is based on the capsule update rfc series sent by Takahiro Akashi[1].
These routines have been tested on the qemu arm64 platform for updating the u-boot firmware through the capsule-on-disk functionality of the uefi spec. A sub-command has been added under the 'efidebug capsule' category of commands for initiating the firmware update.
The capsule file is placed on the efi system partition(esp), under the EFI/UpdateCapsule directory. The BootNext and BootXXXX variables are set accordingly by using the 'efidebug boot add' command.
The capsule update can then be initiated by the following command 'efidebug capsule disk-update'.
The feature can be enabled through the following config options CONFIG_EFI_CAPSULE_UPDATE=y CONFIG_EFI_CAPSULE_ON_DISK=y CONFIG_EFI_CAPSULE_UPDATE_FIRMWARE=y CONFIG_EFI_FIRMWARE_MANAGEMENT_PROTOCOL=y CONFIG_CMD_EFIDEBUG=y
The GenerateCapsule.py script in edk2 has been used to generate the capsule file.
Todo * Capsule authentication support. * Implement firmware version support. * Invoke capsule update functionality during platform boot. This might be taken up by Takahiro.
[1] - https://lists.denx.de/pipermail/u-boot/2020-March/403038.html
Sughosh Ganu (4): efidebug: capsule: Add a command to update capsule on disk semihosting: Change semihosting file operation functions into global symbols semihosting: Add support for writing to a file qemu: arm64: Add support for efi firmware management protocol routines
arch/arm/lib/semihosting.c | 48 ++++++- board/emulation/qemu-arm/Kconfig | 12 ++ board/emulation/qemu-arm/Makefile | 1 + board/emulation/qemu-arm/qemu_efi_fmp.c | 173 ++++++++++++++++++++++++ cmd/efidebug.c | 14 ++ include/semihosting.h | 14 ++ 6 files changed, 257 insertions(+), 5 deletions(-) create mode 100644 board/emulation/qemu-arm/qemu_efi_fmp.c create mode 100644 include/semihosting.h