Thanks all for the detailed answers:
* Initially, I thought the real blocker would be that it's too much footprint 
for too small gain.
* Now I see a clear list of several blockers across multiple domains.

Oh well, it was too good to be true ;-)

--
Oron Peled

On Tuesday, 30 June 2026 17:00:33 IDT Zbigniew Jędrzejewski-Szmek wrote:
> On Tue, Jun 30, 2026 at 01:42:19PM +0200, Lennart Poettering wrote:
> > On Di, 30.06.26 09:43, Zbigniew Jędrzejewski-Szmek ([email protected]) 
> > wrote:
> > 
> > > This approach has been discussed extensively in the past. The "no more
> > > boot loader" project of the grub team implements something like this.
> > >
> > > It is a flexible and powerful approach, but it does have certain 
> > > downsides:
> > 
> > There are a bunch more issues:
> > 
> > - can't kexec windows, i.e. multi-boot stuff is borked with this
> Indeed, I forgot about this. There's even a "prioritized bug" open for this
> (https://bugzilla.redhat.com/show_bug.cgi?id=2049849).
> 
> > - no mechanism for passing over userspace tpm event log
> This could be handled with LUO…
> 
> > - unclear regarding authenticating invoked kernels, i.e. one would
> >   expect that on kexec the kernel would authenticate the next kernel,
> >   and not userspace, but that's not where we are at.
> 
> Zbyszek
> 


-- 
Oron Peled                                 Voice: +972-4-8228492



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