Re: [RFC PATCH 0/4] Alternative TPM patches for Trenchboot

[James Bottomley]

On Mon, 2024-11-04 at 11:34 -0500, Daniel P. Smith wrote:
[...]
> In case the question comes up from those not familiar, the kexec does
> an GETSEC[SEXIT] which closes off access to Localities 1 and 2, thus 
> locking the DRTM PCR values. It brings the CPUs out of SMX mode so
> the target kernel does not require to have any knowledge about
> running in that mode.

So, to repeat the question: why a sysfs interface for setting the
default locality?  If I understand correctly from what you say above,
it can't be used in any kernel except the SL one, and that one could
run permanently in it, so there's no requirement at all for user space
to be able to change this, is there?

Regards,

James