[PATCH V34 09/29] kexec_file: Restrict at runtime if the kernel is locked down

[Matthew Garrett]

On Thu, Jun 27, 2019 at 11:14 AM James Morris <jmorris at namei.org> wrote:
>
> On Thu, 27 Jun 2019, Matthew Garrett wrote:
>
> > By that metric, on a secure boot system how do we determine that code
> > running in the firmware environment wasn't compromised before it
> > launched the initial signed kernel?
>
> Remote attestation tied to a hardware root of trust, before allowing
> access to any further resources.

If you use IMA you can get the same guarantees over kexec.