Hi Bryan,
On 01/12/2018 10:52 PM, Bryan O'Donoghue wrote:
This series adds a new OPTEE bootable image type to u-boot, which is
directly bootable with the bootm command.
There is already a TEE image type but, in this case the TEE firmware is
loaded into RAM, jumped into and then back out of.
This is how OP-TEE upstream designed flow, isn't it?
This image type is a
directly bootable image as described here :
http://mrvan.github.io/optee-imx6ul
Still not clear about the detail flow you are using :( I don't
understand why
we need to support OP-TEE in bootm.
Do you make U-Boot working in secure word?
Instead of reusing the Linux bootable image type instead a new image type
is defined, which allows us to perform additional image verification, prior
to handing off control via bootm.
OPTEE images get linked to a specific address at compile time and must be
loaded to this address too. This series extends out mkimage with a new
image type that allows the OPTEE binary link location to be validated
against CONFIG_OPTEE_TZDRAM_BASE and CONFIG_OPTEE_TZDRAM_SIZE respectively
prior to proceeding through the bootm phase.
Once applied you can generate a bootable OPTEE image like this
mkimage -A arm -T optee -C none -d ./out/arm-plat-imx/core/tee.bin uTee.optee
That image can then be booted directly by bootm. bootm will verify the
header contents of the OPTEE binary against the DRAM area carved out in
u-boot. If the defined DRAM area does not match the link address specified
we refuse to boot.
Kever - I'd like to suggest that your OPTEE SPL image takes a different
image type IH_TYPE_OPTEE_SPL ? to indicate the different behavior your
image type has versus a directly bootable bootm image.
Well, I think we can decide after everything is clear.
Thanks,
-Kever
Bryan O'Donoghue (9):
optee: Add lib entries for sharing OPTEE code across ports
optee: Add CONFIG_OPTEE_TZDRAM_SIZE
optee: Make OPTEE_TZDRAM_BASE a mandatory define
optee: Add optee_image_get_entry_point()
optee: Add optee_image_get_load_addr()
tools: mkimage: add optee image type
optee: Add optee_verify_bootm_image()
optee: Improve error printout
bootm: optee: Add mechanism to validate an OPTEE image before boot
common/bootm.c | 11 +++++++-
common/image.c | 1 +
include/image.h | 1 +
include/tee/optee.h | 41 ++++++++++++++++++++++++++++++
lib/Kconfig | 1 +
lib/Makefile | 1 +
lib/optee/Kconfig | 16 ++++++++++++
lib/optee/Makefile | 7 ++++++
lib/optee/optee.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++
tools/default_image.c | 25 ++++++++++++++-----
10 files changed, 166 insertions(+), 7 deletions(-)
create mode 100644 lib/optee/Kconfig
create mode 100644 lib/optee/Makefile
create mode 100644 lib/optee/optee.c
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