On 6/30/25 7:18 AM, 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.
The fitImage TEE bundling is already documented in the fit spec:
https://fitspec.osfw.foundation/
This here is an application:
"
/dts-v1/;
/ {
...
images {
...
tee-1 {
description = "OP-TEE";
data = /incbin/
("/optee_os/out/arm-plat-stm32mp1/core/tee-raw.bin") ;
type = "tee";
arch = "arm";
compression = "none";
os = "tee";
load = <0xde000000>;
entry = <0xde000000>;
...
};
};
configurations {
default = "conf-1";
conf-1 {
...
loadables = "tee-1";
...
};
};
};
"
"
$ mkimage -E -f fit-image.its fitImage
"
I can add that part to STM32 board docs ?
Furthermore, please, provide tests on QEMU.
The test would require booting Linux, how do you propose we test that in
CI ?
