> 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.
