Hi all,

Sorry for frequent review requests of merging feature-twincpu back. To avoid making it more annoying, I combine three topics here. Please check the details below.

1. NS part changes NSPE mailbox, NS PSA client call interface in multi-core topology, mailbox initialization in NS App main(). https://review.trustedfirmware.org/q/topic:%22twincpu-merge-ns%22+(status:op...)

2. Multi-core memory access check Multi-core specific memory access check since multi-core platform cannot rely on the memory check provided by CMSE. A dedicated design document is uploaded, which has been reviewed and accepted on feature-twincpu branch https://review.trustedfirmware.org/q/topic:%22twincpu-merge-mem-check%22+(st...)

3. Changes to linker script Several changes to linker script to enable multi-core build: Adjust secure data sections layout to save MPU region and memory resource on Armv6-M/Armv7-M Add a RAM code section to support running code from RAM. https://review.trustedfirmware.org/q/topic:%22twincpu-merge-link-script%22+(...)

This should be the last review request/last merge step before pushing specific multi-core platform support, I promise, at least in Sept. 😊

Best regards, Hu Ziji

-----Original Message----- From: TF-M tf-m-bounces@lists.trustedfirmware.org On Behalf Of David Hu (Arm Technology China) via TF-M Sent: Tuesday, September 24, 2019 2:07 PM To: tf-m@lists.trustedfirmware.org Cc: nd nd@arm.com Subject: [TF-M] Please review the changes to TF-M core/SPM and mailbox from feature-twincpu branch

Hi all,

Here is the forth step of merging feature-twincpu back to master branch. It includes the changes to TF-M core/SPM and SPE mailbox implementation. Please help review the patches via https://review.trustedfirmware.org/q/topic:%22twincpu-merge-core-mailbox%22+...)

I planned to split those features into multiple topics but failed due to the dependencies between them. They are the key part of multi-core communication, plus the NS mailbox part. I'd like to introduce the components a little bit below.

1. Common PSA client call handlers Multi-core topology invokes PSA client call via mailbox, rather than by calling veneers. https://review.trustedfirmware.org/c/trusted-firmware-m/+/2019/ extracts out common PSA client call handlers from existing svcalls. Single-Armv8-M and multi-core topology can implement their own PSA client call functions respectively and invoke the common PSA client call handlers.

2. Remote Procedure Call (RPC) RPC layer sits between TF-M SPM and underlying SPE mailbox implementation. It decouples the actual mailbox implementations to TF-M SPM and defines several callbacks for underlying mailbox.

3. SPE mailbox As the name implies, it implements the mailbox functionalities and RPC callbacks in SPE. It also defines mailbox HAL APIs for platforms. The NSPE part mailbox will be uploaded later.

4. Generic multi-core functionalities This part adds several TF-M core functions, with multi-core specific implementations, such as tfm_nspm_thread_entry () and tfm_psa_ipc_request_handler().

Best regards, Hu Ziji

-----Original Message----- From: TF-M tf-m-bounces@lists.trustedfirmware.org On Behalf Of David Hu (Arm Technology China) via TF-M Sent: Friday, September 20, 2019 5:57 PM To: tf-m@lists.trustedfirmware.org Cc: nd nd@arm.com Subject: [TF-M] Please review topology changes for supporting diverse topology use cases

Hi all,

Would you please help review the following patches to support multi-core topology in TF-M? https://review.trustedfirmware.org/q/topic:%22twincpu-merge-topology%22+(sta...)

Those patches prepare for multi-core support being merged from feature-twincpu branch to master branch. It is the third step of the merging back progress. The previous steps are multi-core build enhancement and Armv6-M/Armv7-M arch support below.

If it sounds interesting to you, I'm glad to share more details about multi-core development and plan of merging it back to master.

Best regards, Hu Ziji

-----Original Message----- From: TF-M tf-m-bounces@lists.trustedfirmware.org On Behalf Of David Hu (Arm Technology China) via TF-M Sent: Thursday, September 19, 2019 4:37 PM To: tf-m@lists.trustedfirmware.org Cc: nd nd@arm.com Subject: [TF-M] Please review Armv6-M/Armv7-M support patches

Hi all,

Could you please take a look at the following patch set to add Armv6-M/Armv7-M support? https://review.trustedfirmware.org/q/topic:%22twincpu-merge-arch%22+(status:...)

That patch set merges Armv6-M/Armv7-M support from feature-twincpu branch back to master branch. It is one step of the progress to merge feature-twincpu branch back to master branch.

Any suggestion is welcome. Thanks a lot.

Best regards, Hu Ziji