[PATCH 00/17] (no cover subject)

[Peng Fan]

> Subject: Re: [PATCH 00/17] (no cover subject)
> 
> On 11/4/24 1:20 PM, Peng Fan wrote:
> >> Subject: Re: [PATCH 00/17] (no cover subject)
> >>
> >> On 10/16/24 9:17 AM, Alice Guo wrote:
> >>> This patch set adds the basic support of i.MX95 and has been
> tested
> >> on
> >>> i.MX95 19x19 EVK.
> >> I have a somewhat more generic question -- can we start U-Boot SPL
> >> and U-Boot first, and start the ELE/OpTee/... whatever firmwares
> >> AFTER U-Boot has started, so they can be updated just like the
> kernel
> >> can be updated ?
> >
> > ELE Firmware packed in flash.bin is used by ROM, out of control of
> > SPL/U-Boot.
> 
> Used by ROM how ? Details please ?

ELE Firmware is for secure enclave usage. 8ULP/93 also has it.
I could not share more details.

> 
> > OP-Tee is optional, but if it is there, it could only be loaded by SPL
> > and kicked by ATF
> Why ? U-Boot running in EL3 can start OpTee OS, so what is the
> problem ?

Ah. As we know there is a wrapper in ATF controlled with spd_optee.
Technically let uboot in EL3 to kick optee is feasible, but I am not
sure people would do this.

Regards,
Peng.