Re: Using Rust on non-Rust side of kernel

[Jarkko Sakkinen <jarkko@kernel.org>]

On Sun, Aug 24, 2025 at 10:15:37AM +0300, Jarkko Sakkinen wrote:
> > >> There's one particular challenge where this could help: early boot code
> > >> for D-RTM (i.e., Trenchboot) as given my crate is just a thing in stack
> > >> with no deps, it could be linked also to that payload.

Right so if anyone working on Trenchboot (which I'm helping with by
giving feedback on implementation strategy) is raising eyebrows,
fear not ...

It's more about that if redoing any TPM stuff in Rust, it's best
to design as much of it as possible to run bare metal rather than
requiring a kernel, and only leave small slice of IO code to be
integrated to Linux APIs.

I.e. make a design that addresses all the bottlenecks we've seen
over the years... Thus, tpm2-protocol was first designed with
bare metal in mind, and secondly kernel.

BR, Jarkko