[PATCH v2 0/2] STM32 Extended TrustZone Protection driver

From: Benjamin Gaignard
Date: Thu Mar 01 2018 - 08:58:31 EST


On early boot stages STM32MP1 platform is able to dedicate some hardware blocks
to a secure OS running in TrustZone.
We need to avoid using those hardware blocks on non-secure context (i.e. kernel)
because read/write accesses could generate illegale access exceptions.

Extended TrustZone Protection driver make sure that device is disabled if
non-secure world can't acces to it.

version 2:
- do not use notifier anymore
- change status property value in device-tree if needed
- use a list of phandle instead of hard coded array

NOTE: Those patches should be applied only on
git://git.kernel.org/pub/scm/linux/kernel/git/atorgue/stm32.git stm32-next
until this patch: https://lkml.org/lkml/2018/2/26/386
find it way to mainline because KBuild will complain about them.

Benjamin Gaignard (2):
dt-bindings: stm32: Add bindings for Extended TrustZone Protection
ARM: mach-stm32: Add Extended TrustZone Protection driver

.../bindings/arm/stm32/st,stm32mp1-etzpc.txt | 25 +++++
arch/arm/mach-stm32/Kconfig | 7 ++
arch/arm/mach-stm32/Makefile | 1 +
arch/arm/mach-stm32/stm32-etzpc.c | 116 +++++++++++++++++++++
4 files changed, 149 insertions(+)
create mode 100644 Documentation/devicetree/bindings/arm/stm32/st,stm32mp1-etzpc.txt
create mode 100644 arch/arm/mach-stm32/stm32-etzpc.c

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