Kernel cmdline parameters

[Paco GB]

Hi again,

Trying to understand how the ChromeOS kernel works, I have some questions about the kernel cmdline parameters "root_hexdigest" and "salt" I would want to ask you:

- How are those two parameters generated? 

- Are they different for the Kernel A and Kernel B? 

Thank you!

[Mike Frysinger]

those are standard dm-verity parameters.  please see the upstream verity docs:

  https://www.kernel.org/doc/Documentation/device-mapper/verity.txt

as for diff between kernel a & kernel b, the kernel doesn't care.  the values reflect the rootfs, so if root a is diff from root b, then the parameters will be diff too.

-mike

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[Paco GB]

Thanks Mike, it was very helpful