Hi,
This adds support for storing AVB rollback indexes in the RPMB partition.
The RPMB partition (content and key) is managed by OP-TEE
(https://www.op-tee.org/) which is a secure OS leveraging ARM TrustZone.
The Linux kernel can already support OP-TEE with reading and updating
rollback indexes in the RPMB partition, the catch is that this is needed
before the kernel has booted.
The design here is the same as what is in the Linux kernel, with the
exception that the user space daemon tee-supplicant is integrated in the
OP-TEE driver here (drivers/tee/optee/supplicant.c) instead. A new uclass
(UCLASS_TEE) is introduced to provide an abstraction for interfacing with a
Trusted Execution Environment (TEE). There's also the OP-TEE driver using
UCLASS_TEE for registration.
A Trusted Application (TA) interface is added to be used by the AVB verify
functions which are updated accordingly. The TA is managed by OP-TEE and is
executed in a secure TrustZone protected environment.
The header files drivers/tee/optee/optee_{msg,msg_supplicant,smc}.h and
include/tee/optee_ta_avb.h are copied from
https://github.com/OP-TEE/optee_os/tree/master more or less unmodified.
They may need to be updated from time to time in order to support new
features.
In MMC there's a new function, mmc_rpmb_route_frames(), which as the name
suggests is used to route RPMB frames to/from the MMC. This saves OP-TEE
from implementing an MMC driver which would need to share resources with
its counterpart here in U-boot.
This was tested on a Hikey (Kirin 620) board.
I've added myself as maintainer of the TEE stuff.
Thanks,
Jens
Jens Wiklander (10):
dm: fdt: scan for devices under /firmware too
cmd: avb read_rb: print rb_idx in hexadecimal
mmc: rpmb: add mmc_rpmb_route_frames()
Add UCLASS_TEE for Trusted Execution Environment
dt/bindings: add bindings for optee
tee: add OP-TEE driver
arm: dt: hikey: Add optee node
optee: support routing of rpmb data frames to mmc
tee: optee: support AVB trusted application
avb_verify: support using OP-TEE TA AVB
MAINTAINERS | 7 +
arch/arm/dts/hi6220-hikey.dts | 7 +
cmd/avb.c | 2 +-
common/avb_verify.c | 132 +++-
.../firmware/linaro,optee-tz.txt | 31 +
drivers/Kconfig | 2 +
drivers/Makefile | 1 +
drivers/core/root.c | 15 +-
drivers/mmc/rpmb.c | 160 +++++
drivers/tee/Kconfig | 18 +
drivers/tee/Makefile | 4 +
drivers/tee/optee/Kconfig | 23 +
drivers/tee/optee/Makefile | 5 +
drivers/tee/optee/core.c | 622 ++++++++++++++++++
drivers/tee/optee/optee_msg.h | 423 ++++++++++++
drivers/tee/optee/optee_msg_supplicant.h | 234 +++++++
drivers/tee/optee/optee_private.h | 41 ++
drivers/tee/optee/optee_smc.h | 444 +++++++++++++
drivers/tee/optee/rpmb.c | 184 ++++++
drivers/tee/optee/supplicant.c | 92 +++
drivers/tee/tee-uclass.c | 180 +++++
include/avb_verify.h | 4 +
include/dm/uclass-id.h | 1 +
include/mmc.h | 2 +
include/tee.h | 141 ++++
include/tee/optee_ta_avb.h | 48 ++
26 files changed, 2816 insertions(+), 7 deletions(-)
create mode 100644 doc/device-tree-bindings/firmware/linaro,optee-tz.txt
create mode 100644 drivers/tee/Kconfig
create mode 100644 drivers/tee/Makefile
create mode 100644 drivers/tee/optee/Kconfig
create mode 100644 drivers/tee/optee/Makefile
create mode 100644 drivers/tee/optee/core.c
create mode 100644 drivers/tee/optee/optee_msg.h
create mode 100644 drivers/tee/optee/optee_msg_supplicant.h
create mode 100644 drivers/tee/optee/optee_private.h
create mode 100644 drivers/tee/optee/optee_smc.h
create mode 100644 drivers/tee/optee/rpmb.c
create mode 100644 drivers/tee/optee/supplicant.c
create mode 100644 drivers/tee/tee-uclass.c
create mode 100644 include/tee.h
create mode 100644 include/tee/optee_ta_avb.h
--
2.17.1
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