[PATCH 0/8] spl: fit: Play nicely with OP-TEE and Linux

Alexandru Gagniuc
2020-12-16T00:09:36Z

This patch series is part of a larger effort to get linux to boot
really fast alongside a secure OS. One piece of the puzzle is getting
Linux and OP-TEE to boot straight from SPL. This is where the FIT
image comes in.

The "simple" fit code was mostly ready for this, although it was
quite difficult to navigate. As I was figuring out the required
changes, I realized I had also managed to do some major refactoring.
In fact, of the eight changes, (6) are refactoring patches, and (2)
are functional changes.

I wish I could have written this with a negative line count. I have
unfortunately failed at that, and this series will be adding 12 lines
to u-boot. The takeaway is that the following type FIT can be loaded
from SPL directly:

images {
optee at 1 {
type = "tee";
os = "tee";
...
};
kernel at 1 {
type = "kernel";
os = "linux";
...
};
fdt at devicetree.dtb { ... }
fdt at bootargs { ... };
};

configurations {
conf at quickboot {
kernel = "optee at 1";
fdt = "fdt at stm32mp157c-ev1.dtb", "fdt at bootargs";
loadables = "kernel at 1";
};
};

This series is designed to apply to u-boot/next:
* 8351a29d2d Merge tag 'dm-pull-14dec20' of git://git.denx.de/u-boot-dm into next

Alexandru Gagniuc (8):
spl: fit: Drop 'length' argument to board_spl_fit_post_load()
spl: fit: Factor out FIT parsing and use a context struct
spl: fit: Pass FIT context via a structure pointer
spl: fit: Remove useless loop in spl_fit_get_image_name()
spl: fit: Only look up FIT configuration node once
image: Do not #if guard board_fit_config_name_match() prototype
spl: fit: Replace #ifdef blocks with more readable constructs
spl: fit: Load devicetree when a Linux payload is found

arch/arm/mach-imx/spl.c | 5 +-
common/spl/spl_fit.c | 260 +++++++++++++++++++++-------------------
include/image.h | 3 -
include/spl.h | 2 +-
4 files changed, 141 insertions(+), 129 deletions(-)

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2.26.2