Hello Takahiro,
Am 17.06.2023 um 02:45 schrieb AKASHI Takahiro:
On Fri, Jun 16, 2023 at 01:34:21PM +0200, Stefan Herbrechtsmeier wrote:
From: Stefan Herbrechtsmeier stefan.herbrechtsmeier@weidmueller.com
Currently, the mkeficapsule tool supports at most one payload inside the capsule. However, the UEFI specification and the u-boot code support multiple payloads inside one capsule. Extend the tool by this feature. The tool is kept backwards-compatible, so it can still be used and called exactly as before if desired.
One of reasons why only a single image be included is that I didn't see any strong reason to do so because U-Boot already has an archive format of multiple images, named FIT. I wanted to utilize the existing framework which is widely used on U-Boot and the current implementation of FMP supports this format. It seems to be just enough.
Do you have any useful use case of multiple images?
-Takahiro Akashi
thank you for the feedback. I did not of think of this as the solution to our use case as I had my EFI view point glasses on. I will check if we can use the existing solution for our use case. However, I think the extension is either still valuable or some u-boot code could be removed.
Currently, the u-boot EFI code allows for multiple payloads as does the EFI specification. Are there any tests which test this part of the u-boot code? AFAIK my extension of the mkeficapsule tool is the first that allows for testing this u-boot code and does so with the accompanying tests.
Another question is: Why does the support for multiple payloads inside a capsule exists in the u-boot code basis in the first place? Right now there seem to be two ways to update multiple binaries with a capsule update (a FIT image and a capsule containing multiple payloads). Either it should be a valid assumption that both features can be used and the accompanying tools can be extended to help make use of them or documentation should exist which points out that only one of the solutions is acceptable.
Best Regards Malte
Malte Schmidt (5): mkeficapsule: constify function parameters mkeficapsule: add support for multiple payloads inside capsule test: efi_capsule: test a capsule update containing multiple images doc: uefi: update mkeficapsule documentation doc: uefi: clarify capsule concept
doc/develop/uefi/uefi.rst | 73 +- test/py/tests/test_efi_capsule/conftest.py | 18 +- .../test_capsule_firmware_raw.py | 46 +- .../test_capsule_firmware_signed_raw.py | 24 +- tools/eficapsule.h | 5 - tools/mkeficapsule.c | 651 +++++++++++++----- 6 files changed, 622 insertions(+), 195 deletions(-)
-- 2.30.2