From: Benjamin Gaignard <benjamin.gaignard@linaro.org>
To: robh+dt@kernel.org, mark.rutland@arm.com,
mcoquelin.stm32@gmail.com, alexandre.torgue@st.com,
robin.murphy@arm.com, arnd@arndb.de, loic.pallardy@st.com
Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Benjamin Gaignard <benjamin.gaignard@st.com>
Subject: [PATCH v2 0/2] STM32 Extended TrustZone Protection driver
Date: Thu, 1 Mar 2018 14:58:04 +0100 [thread overview]
Message-ID: <20180301135806.19982-1-benjamin.gaignard@st.com> (raw)
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
--
2.15.0
next reply other threads:[~2018-03-01 13:58 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-01 13:58 Benjamin Gaignard [this message]
2018-03-01 13:58 ` [PATCH v2 1/2] dt-bindings: stm32: Add bindings for Extended TrustZone Protection Benjamin Gaignard
2018-03-01 14:03 ` Mark Rutland
2018-03-01 14:09 ` Benjamin Gaignard
2018-03-01 13:58 ` [PATCH v2 2/2] ARM: mach-stm32: Add Extended TrustZone Protection driver Benjamin Gaignard
2018-03-01 14:02 ` [PATCH v2 0/2] STM32 " Mark Rutland
2018-03-01 14:15 ` Benjamin Gaignard
2018-03-01 14:19 ` Robin Murphy
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