On Thu, 25 Apr 2024 at 16:16, Caleb Connolly caleb.connolly@linaro.org wrote:
I discussed an idea with Ilias to generate GUIDs dynamically based on the board compatible/model, which seem to essentially just an abstraction on this..
Yup, that works too -- on the assumption the compatible string is unique enough.
Of course, it's much better if they have different GUIDs in the ESRT to completely avoid the chance of the wrong firmware being flashed on the wrong device.
So expanding on the above a bit, the idea Ilias and I brainstormed was to use v5 GUIDs (which are deterministic based on a "salt" GUID and some arbitrary data which is hashed together). We would use the board model and compatible, as well as the firmware image name to generate these.
So that's kinda like Microsoft CHID, and I'm wondering why you couldn't just use one of the GUIDs from `sudo fwupdtool hwids` actually *as* the capsule GUID.
Richard.