On 6/30/25 9:47 PM, Tom Rini wrote:
On Mon, Jun 30, 2025 at 07:18:33AM +0200, Heinrich Schuchardt wrote:
Am 30. Juni 2025 02:08:05 MESZ schrieb Marek Vasut <[email protected]>:
Add support for jumping to Linux kernel through OpTee-OS on ARMv7a.
This is only supported if U-Boot runs in PL1 secure. This change adds
two components, one is fitImage OpTee-OS loadable handler, which makes
a note of OpTee-OS being loaded and stores the load address for later
jump to it. The second part is the actual jump to Linux through OpTee-OS.
The jump through OpTee-OS requires set up of multiple CPU registers, r1
and r2 are passed through, r0 and r3 have to be set to 0, lr is set to
Linux kernel entry point. This setup is done by new assembler function
boot_jump_linux_via_optee().
The boot_jump_linux_via_optee() also includes STM32MP13xx late TZC
configuration write, this cannot be moved easily, hence the ifdef.
Hello Marek,
Could you, please, add a documentation change to the series. This would allow
reviewers to test your proposal.
Furthermore, please, provide tests on QEMU.
Documentation is good, also wiring up this use case for testing in CI
via QEMU is a rather large ask. We're still on needing a general boot OS
test or two in CI (and Ilias noted either on a call or IRC, I forget
now, that there's been some progress on making up a small enough generic
OS image to work from).
I would really like these two patches to land, it is the remaining piece
I need to make STM32MP13xx usable with pure U-Boot. How can we proceed
here ?
