Comment # 59 on bug 1122614 from Andreas F�rber

(In reply to Michael Chang from comment #58)
> (In reply to Chester Lin from comment #56)
> > (In reply to Chester Lin from comment #54)
> 
> > The maintainer Ard suggests that this issue should be fixed in bootloader or
> > grub.
> > 
> > https://patchwork.kernel.org/patch/11072713/#22797553
> 
> I had some conversation with Chester and it looks to be u-boot currently
> making the reservation below 128MB, the grub doesn't have such reservation
> to be corrected.

Yes, we know U-Boot is making the reservation. But it makes it for a reason.

For RPi3 and RPi4 we are evaluating TF-A, which would avoid the spin-table in
favor of a PSCI hypercall (U-Boot could then be extended to check the DT for
whether or not to make the reservation), but for RPi2 and earlier I am not
aware of anyone investigating TF-A and I'm not familiar of whether in absence
of EL3 in ARMv7 there might be some other solution there.