Re: [TF-A] Does TF-A support to load and run both TEE and SPM_MM?

Hi Heyi,

Happy to discuss the detail but the short answer is no.

Instead, it is possible to run an MM partition in S-EL0 under the TEE. This work is being done with OP-TEE.

From a SW architecture standpoint, it did not seem like a good idea to let EL3 run its "application" i.e. MM SP alongside a TEE which also runs its own applications. It is better to let the TEE own S-EL1 and run all applications in S-EL0 under it.

Cheers, Achin

On 23/11/2020, 05:36, "TF-A on behalf of Heyi Guo via TF-A" <tf-a-bounces@lists.trustedfirmware.org on behalf of tf-a@lists.trustedfirmware.org> wrote:

Hi All,

On some platforms there may be requirements to run both TEE and SPM_MM instances, such as providing TEE services on server platforms.

Do TF-A support this scenario? If it doesn't, do it make sense to add such support?

Thanks,

Heyi

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