Re: [PATCH v5 0/7] Add support to boot TI K3 HSM M4 core

On July 20, 2026 thus sayeth Beleswar Padhi:
> Some TI K3 SoCs like J721S2, J784S4, and J722S have a HSM (High Security
> Module) M4F core in the Wakeup Voltage Domain which could be used to
> run secure services like Authentication. Boot flow for HSM M4 core is
> different than the general purpose M4F cores, and is as below:
> 
> 1. Request control of HSM M4F remote processor.
> 2. Assert Reset on the HSM M4F remote processor.
> 3. Request Secure Entity to Authenticate and Load HSM firmware into
>    core's internal SRAM memory region. For GP device, load the firmware
>    manually into core's SRAM region.
> 4. Deassert Reset on the HSM M4F remote processor.
> 5. Release control of HSM M4F remote processor.
> 
> This series adds support to boot HSM M4 core from R5 SPL stage. The HSM
> firmware is packed inside the tispl.bin fit image. The firmware is
> unpacked into a temporary DDR address which is then used to load HSM
> core. The configs to boot HSM M4 core are disabled by default.
> 
> Additional documentation on HSM M4 core usage:
> https://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-j784s4/latest/exports/docs/linux/Foundational_Components/U-Boot/UG-HSM.html

This information should be included in the docs here to avoid issues 
when the evil vendor tree gets out of sync tree every year.

~Bryan