On 25-05-28, Michael Tretter wrote: > The upstream OP-TEE expects a device tree to be able to initialize the > dynamic shared memory. Therefore, barebox should pass a device tree that > contains memory nodes through the TF-A to OP-TEE. > > OP-TEE may modify the passed fdt. Thus, barebox copies the fdt from the > fixed size rodata area to the rk_scratch area and allocates a > configurable memory area for the fdt to allow fdt modification. > > OP-TEE has the CFG_DTB_MAX_SIZE config option for the maximum size of > the fdt. barebox must reserve at least that much memory for the fdt to > avoid out of bounds accesses from OP-TEE. > > Unfortunately, the downstream TF-A fails to start if barebox passes its > device tree and it is not possible to detect if the loaded TF-A is able > to handle the device tree. Add a config option to pass the device tree > if it is possible. > > Signed-off-by: Michael Tretter <m.tret...@pengutronix.de>
Reviewed-by: Marco Felsch <m.fel...@pengutronix.de>
