diff mbox series

[v8,03/13] dt-bindings: bus: document RIFSC

Message ID 20231212152356.345703-4-gatien.chevallier@foss.st.com
State Superseded
Headers show
Series Introduce STM32 Firewall framework | expand

Commit Message

Gatien CHEVALLIER Dec. 12, 2023, 3:23 p.m. UTC
Document RIFSC (RIF security controller). RIFSC is a firewall controller
composed of different kinds of hardware resources.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
---

Changes in V6:
	- Renamed access-controller to access-controllers
	- Removal of access-control-provider property
	- Removal of access-controller and access-controller-names
	  declaration in the patternProperties field. Add
	  additionalProperties: true in this field.

Changes in V5:
	- Renamed feature-domain* to access-control*

Changes in V2:
	- Corrected errors highlighted by Rob's robot
	- No longer define the maxItems for the "feature-domains"
	  property
	- Fix example (node name, status)
	- Declare "feature-domain-names" as an optional
	  property for child nodes
	- Fix description of "feature-domains" property

 .../bindings/bus/st,stm32mp25-rifsc.yaml      | 96 +++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/bus/st,stm32mp25-rifsc.yaml

Comments

Rob Herring Dec. 21, 2023, 9:53 p.m. UTC | #1
On Tue, Dec 12, 2023 at 04:23:46PM +0100, Gatien Chevallier wrote:
> Document RIFSC (RIF security controller). RIFSC is a firewall controller
> composed of different kinds of hardware resources.
> 
> Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
> ---
> 
> Changes in V6:
> 	- Renamed access-controller to access-controllers
> 	- Removal of access-control-provider property
> 	- Removal of access-controller and access-controller-names
> 	  declaration in the patternProperties field. Add
> 	  additionalProperties: true in this field.
> 
> Changes in V5:
> 	- Renamed feature-domain* to access-control*
> 
> Changes in V2:
> 	- Corrected errors highlighted by Rob's robot
> 	- No longer define the maxItems for the "feature-domains"
> 	  property
> 	- Fix example (node name, status)
> 	- Declare "feature-domain-names" as an optional
> 	  property for child nodes
> 	- Fix description of "feature-domains" property
> 
>  .../bindings/bus/st,stm32mp25-rifsc.yaml      | 96 +++++++++++++++++++
>  1 file changed, 96 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/bus/st,stm32mp25-rifsc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/bus/st,stm32mp25-rifsc.yaml b/Documentation/devicetree/bindings/bus/st,stm32mp25-rifsc.yaml
> new file mode 100644
> index 000000000000..95aa7f04c739
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/bus/st,stm32mp25-rifsc.yaml
> @@ -0,0 +1,96 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/bus/st,stm32mp25-rifsc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: STM32 Resource isolation framework security controller
> +
> +maintainers:
> +  - Gatien Chevallier <gatien.chevallier@foss.st.com>
> +
> +description: |
> +  Resource isolation framework (RIF) is a comprehensive set of hardware blocks
> +  designed to enforce and manage isolation of STM32 hardware resources like
> +  memory and peripherals.
> +
> +  The RIFSC (RIF security controller) is composed of three sets of registers,
> +  each managing a specific set of hardware resources:
> +    - RISC registers associated with RISUP logic (resource isolation device unit
> +      for peripherals), assign all non-RIF aware peripherals to zero, one or
> +      any security domains (secure, privilege, compartment).
> +    - RIMC registers: associated with RIMU logic (resource isolation master
> +      unit), assign all non RIF-aware bus master to one security domain by
> +      setting secure, privileged and compartment information on the system bus.
> +      Alternatively, the RISUP logic controlling the device port access to a
> +      peripheral can assign target bus attributes to this peripheral master port
> +      (supported attribute: CID).
> +    - RISC registers associated with RISAL logic (resource isolation device unit
> +      for address space - Lite version), assign address space subregions to one
> +      security domains (secure, privilege, compartment).
> +
> +properties:
> +  compatible:
> +    contains:
> +      const: st,stm32mp25-rifsc

This needs to be exact and include 'simple-bus'. You'll need a custom
'select' with the above to avoid matching all other 'simple-bus' cases.

With that,

Reviewed-by: Rob Herring <robh@kernel.org>
Gatien CHEVALLIER Jan. 5, 2024, 8:19 a.m. UTC | #2
Hi Rob,

On 12/21/23 22:53, Rob Herring wrote:
> On Tue, Dec 12, 2023 at 04:23:46PM +0100, Gatien Chevallier wrote:
>> Document RIFSC (RIF security controller). RIFSC is a firewall controller
>> composed of different kinds of hardware resources.
>>
>> Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
>> ---
>>
>> Changes in V6:
>> 	- Renamed access-controller to access-controllers
>> 	- Removal of access-control-provider property
>> 	- Removal of access-controller and access-controller-names
>> 	  declaration in the patternProperties field. Add
>> 	  additionalProperties: true in this field.
>>
>> Changes in V5:
>> 	- Renamed feature-domain* to access-control*
>>
>> Changes in V2:
>> 	- Corrected errors highlighted by Rob's robot
>> 	- No longer define the maxItems for the "feature-domains"
>> 	  property
>> 	- Fix example (node name, status)
>> 	- Declare "feature-domain-names" as an optional
>> 	  property for child nodes
>> 	- Fix description of "feature-domains" property
>>
>>   .../bindings/bus/st,stm32mp25-rifsc.yaml      | 96 +++++++++++++++++++
>>   1 file changed, 96 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/bus/st,stm32mp25-rifsc.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/bus/st,stm32mp25-rifsc.yaml b/Documentation/devicetree/bindings/bus/st,stm32mp25-rifsc.yaml
>> new file mode 100644
>> index 000000000000..95aa7f04c739
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/bus/st,stm32mp25-rifsc.yaml
>> @@ -0,0 +1,96 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/bus/st,stm32mp25-rifsc.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: STM32 Resource isolation framework security controller
>> +
>> +maintainers:
>> +  - Gatien Chevallier <gatien.chevallier@foss.st.com>
>> +
>> +description: |
>> +  Resource isolation framework (RIF) is a comprehensive set of hardware blocks
>> +  designed to enforce and manage isolation of STM32 hardware resources like
>> +  memory and peripherals.
>> +
>> +  The RIFSC (RIF security controller) is composed of three sets of registers,
>> +  each managing a specific set of hardware resources:
>> +    - RISC registers associated with RISUP logic (resource isolation device unit
>> +      for peripherals), assign all non-RIF aware peripherals to zero, one or
>> +      any security domains (secure, privilege, compartment).
>> +    - RIMC registers: associated with RIMU logic (resource isolation master
>> +      unit), assign all non RIF-aware bus master to one security domain by
>> +      setting secure, privileged and compartment information on the system bus.
>> +      Alternatively, the RISUP logic controlling the device port access to a
>> +      peripheral can assign target bus attributes to this peripheral master port
>> +      (supported attribute: CID).
>> +    - RISC registers associated with RISAL logic (resource isolation device unit
>> +      for address space - Lite version), assign address space subregions to one
>> +      security domains (secure, privilege, compartment).
>> +
>> +properties:
>> +  compatible:
>> +    contains:
>> +      const: st,stm32mp25-rifsc
> 
> This needs to be exact and include 'simple-bus'. You'll need a custom
> 'select' with the above to avoid matching all other 'simple-bus' cases.
> 
> With that,
> 
> Reviewed-by: Rob Herring <robh@kernel.org>

Thank you for the review,
I'll update this for the next version whilst applying your tag

Gatien
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/bus/st,stm32mp25-rifsc.yaml b/Documentation/devicetree/bindings/bus/st,stm32mp25-rifsc.yaml
new file mode 100644
index 000000000000..95aa7f04c739
--- /dev/null
+++ b/Documentation/devicetree/bindings/bus/st,stm32mp25-rifsc.yaml
@@ -0,0 +1,96 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/bus/st,stm32mp25-rifsc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STM32 Resource isolation framework security controller
+
+maintainers:
+  - Gatien Chevallier <gatien.chevallier@foss.st.com>
+
+description: |
+  Resource isolation framework (RIF) is a comprehensive set of hardware blocks
+  designed to enforce and manage isolation of STM32 hardware resources like
+  memory and peripherals.
+
+  The RIFSC (RIF security controller) is composed of three sets of registers,
+  each managing a specific set of hardware resources:
+    - RISC registers associated with RISUP logic (resource isolation device unit
+      for peripherals), assign all non-RIF aware peripherals to zero, one or
+      any security domains (secure, privilege, compartment).
+    - RIMC registers: associated with RIMU logic (resource isolation master
+      unit), assign all non RIF-aware bus master to one security domain by
+      setting secure, privileged and compartment information on the system bus.
+      Alternatively, the RISUP logic controlling the device port access to a
+      peripheral can assign target bus attributes to this peripheral master port
+      (supported attribute: CID).
+    - RISC registers associated with RISAL logic (resource isolation device unit
+      for address space - Lite version), assign address space subregions to one
+      security domains (secure, privilege, compartment).
+
+properties:
+  compatible:
+    contains:
+      const: st,stm32mp25-rifsc
+
+  reg:
+    maxItems: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 1
+
+  ranges: true
+
+  "#access-controller-cells":
+    const: 1
+    description:
+      Contains the firewall ID associated to the peripheral.
+
+patternProperties:
+  "^.*@[0-9a-f]+$":
+    description: Peripherals
+    type: object
+
+    additionalProperties: true
+
+    required:
+      - access-controllers
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+  - "#access-controller-cells"
+  - ranges
+
+additionalProperties: false
+
+examples:
+  - |
+    // In this example, the usart2 device refers to rifsc as its domain
+    // controller.
+    // Access rights are verified before creating devices.
+
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    rifsc: bus@42080000 {
+        compatible = "st,stm32mp25-rifsc";
+        reg = <0x42080000 0x1000>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+        #access-controller-cells = <1>;
+        ranges;
+
+        usart2: serial@400e0000 {
+              compatible = "st,stm32h7-uart";
+              reg = <0x400e0000 0x400>;
+              interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
+              clocks = <&ck_flexgen_08>;
+              access-controllers = <&rifsc 32>;
+        };
+    };