Hi Akashi-san,
On Sat, 4 Mar 2023 at 10:28, Takahiro Akashi takahiro.akashi@linaro.org wrote:
Kojima-san,
On Wed, Mar 01, 2023 at 06:15:18PM +0900, Masahisa Kojima wrote:
Firmware version management is not implemented in the current FMP implementation. This series aims to add the versioning support in FMP.
I think that you need to think of A/B update case, especially when a capsule update is *reverted* to an older version.
A/B update(FWU) has their own version information in the Image Directory defined in FWU spec[1], this is not implemented yet on U-Boot. On second thought, I think A/B update(FWU) case should be excluded from the version management introduced by this series.
In addition, please don't forget in the next patch set:
- update the man page of mkeficapsule command
- add test cases (in pytest)
Yes, noted.
[1] https://developer.arm.com/documentation/den0118/a/
Thanks, Masahisa Kojima
-Takahiro Akashi
EDK2 reference implementation utilizes the FMP Payload Header inserted right before the capsule payload. With this series, U-Boot also follows the EDK2 implementation.
Currently, there is no way to know the current running firmware version through the EFI interface. FMP->GetImageInfo() returns always 0 for the version number. So a user can not know that expected firmware is running after the capsule update.
With this series applied, version number can be specified in the capsule file generation with mkeficapsule tool, then user can know the running firmware version through FMP->GetImageInfo() and ESRT.
Note that this series does not mandate the FMP Payload Header, compatible with boards that are already using the existing U-Boot FMP implementation. If no FMP Payload Header is found in the capsule file, fw_version, lowest supported version, last attempt version and last attempt status is set to 0 and this is the same behavior as existing FMP implementation.
Changes in v2:
- add FMP Payload Header generation in mkeficapsule tool
Masahisa Kojima (4): efi_loader: store firmware version into FmpState variable efi_loader: versioning support in GetImageInfo efi_loader: check lowest supported version in capsule update mkeficapsule: add FMP Payload Header
lib/efi_loader/efi_firmware.c | 271 ++++++++++++++++++++++++++++++---- tools/mkeficapsule.c | 81 +++++++++- 2 files changed, 319 insertions(+), 33 deletions(-)
-- 2.17.1