drivers: stm32_rif: update and fix RIF configuration parsing

Fix the parsing of the RIF configuration by using device tree bindings,
when necessary. Generalize RIF bit fields and use them when deali

drivers: stm32_rif: update and fix RIF configuration parsing

Fix the parsing of the RIF configuration by using device tree bindings,
when necessary. Generalize RIF bit fields and use them when dealing
with generic RIF functions. Update drivers that use stm32_rif_parse_cfg()
accordingly.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
Fixes: 1506f47af917 ("drivers: firewall: add stm32_rif driver for common RIF features")

show more ...

drivers: stm32_rif: tag unused parameters as __unused

When CFG_STM32_RIF is not set, inclusion of this header file causes
warnings because of function parameters not being tagged as unused.
Tag them

drivers: stm32_rif: tag unused parameters as __unused

When CFG_STM32_RIF is not set, inclusion of this header file causes
warnings because of function parameters not being tagged as unused.
Tag them properly.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Fixes: 1506f47af917 ("drivers: firewall: add stm32_rif driver for common RIF features")
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>

show more ...

drivers: stm32_rif: add stm32_rif_access_violation_action()

This function should be used by peripherals capable on raising
access violation interrupts (SERC, IAC). The behavior of the platform
on su

drivers: stm32_rif: add stm32_rif_access_violation_action()

This function should be used by peripherals capable on raising
access violation interrupts (SERC, IAC). The behavior of the platform
on such event is platform-specific. Therefore, its definition must be
done at platform level.

Also add CFG_STM32_PANIC_ON_IAC_EVENT and CFG_STM32_PANIC_ON_SERC_EVENT
to choose if the platform should panic upon receiving an IAC or a
SERC event.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

show more ...

drivers: firewall: fix stm32_rif_semaphore_enabled_and_ok() prototype

The stm32_rif_semaphore_enabled_and_ok() function checks a single CID
at a time, not a bit field.

Fixes: 1506f47af917 ("drivers

drivers: firewall: fix stm32_rif_semaphore_enabled_and_ok() prototype

The stm32_rif_semaphore_enabled_and_ok() function checks a single CID
at a time, not a bit field.

Fixes: 1506f47af917 ("drivers: firewall: add stm32_rif driver for common RIF features")
Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

show more ...

drivers: add stm32 RIFSC support

Add the RIFSC new driver support.

RIFSC (RIF Security Controller) is responsible for the isolation
of hardware resources like memory or peripherals. It is composed

drivers: add stm32 RIFSC support

Add the RIFSC new driver support.

RIFSC (RIF Security Controller) is responsible for the isolation
of hardware resources like memory or peripherals. It is composed of:

-RISC registers(slave peripherals) with RISUP(Resource Isolation
Slave Unit for Peripherals) OR RISAL(Resource Isolation Slave Unit
for Address space - Lite) logics.
-RIMC registers(Non RIF-Aware masters counterpart) with RIMU
(Resource Isolation Master Unit) logic. It is possible for a master to
inherit from its slave port(RISUP) configuration.

This driver parses the RIFSC device tree configuration and applies
it to put the firewall in place. Therefore, the device tree is
mandatory.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Acked-by: Etienne Carriere <etienne.carriere@foss.st.com>

show more ...

drivers: firewall: add stm32_rif driver for common RIF features

The resource isolation framework (RIF) is a comprehensive set of
hardware blocks designed to enforce and manage the isolation of
STM32

drivers: firewall: add stm32_rif driver for common RIF features

The resource isolation framework (RIF) is a comprehensive set of
hardware blocks designed to enforce and manage the isolation of
STM32MP25xx hardware resources, like memories and peripherals.

The RIF manages security and privilege levels as well as compartment
filtering. Each compartment is identified by a Compartment ID (CID).

Therefore, the access filtering can be, depending on the case:
• restricted to none, one or more than one CID
• secure-only, non-secure only, or both
• privileged-only or privileged/unprivileged
• read-only, write-only, or read/write

Add a firewall driver folder that contains firewall drivers.
This RIF driver contains generic features shared between all drivers
managing RIF configuration.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Acked-by: Etienne Carriere <etienne.carriere@foss.st.com>

show more ...