| Message ID | 20240607093326.369090-4-arnaud.pouliquen@foss.st.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Introduction of a remoteproc tee to load signed firmware | expand |
On Fri, 07 Jun 2024 11:33:24 +0200, Arnaud Pouliquen wrote: > The "st,stm32mp1-m4-tee" compatible is utilized in a system configuration > where the Cortex-M4 firmware is loaded by the Trusted Execution Environment > (TEE). > > For instance, this compatible is used in both the Linux and OP-TEE device > trees: > - In OP-TEE, a node is defined in the device tree with the > "st,stm32mp1-m4-tee" compatible to support signed remoteproc firmware. > Based on DT properties, the OP-TEE remoteproc framework is initiated to > expose a trusted application service to authenticate and load the remote > processor firmware provided by the Linux remoteproc framework, as well > as to start and stop the remote processor. > - In Linux, when the compatibility is set, the Cortex-M resets should not > be declared in the device tree. In such a configuration, the reset is > managed by the OP-TEE remoteproc driver and is no longer accessible from > the Linux kernel. > > Associated with this new compatible, add the "st,proc-id" property to > identify the remote processor. This ID is used to define a unique ID, > common between Linux, U-Boot, and OP-TEE, to identify a coprocessor. > This ID will be used in requests to the OP-TEE remoteproc Trusted > Application to specify the remote processor. > > Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com> > --- > update vs previous version > - merge [PATCH v5 4/7] remoteproc: core introduce rproc_set_rsc_table_on_start function > as new "st,proc-id" is associated to "st,stm32mp1-m4-tee" compatible > - update commit message > - remove Reviewed-by: Rob Herring <robh@kernel.org> as patch is updated > --- > .../bindings/remoteproc/st,stm32-rproc.yaml | 58 ++++++++++++++++--- > 1 file changed, 50 insertions(+), 8 deletions(-) > Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/remoteproc/st,stm32-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/st,stm32-rproc.yaml index 370af61d8f28..409123cd4667 100644 --- a/Documentation/devicetree/bindings/remoteproc/st,stm32-rproc.yaml +++ b/Documentation/devicetree/bindings/remoteproc/st,stm32-rproc.yaml @@ -16,7 +16,12 @@ maintainers: properties: compatible: - const: st,stm32mp1-m4 + enum: + - st,stm32mp1-m4 + - st,stm32mp1-m4-tee + description: + Use "st,stm32mp1-m4" for the Cortex-M4 coprocessor management by non-secure context + Use "st,stm32mp1-m4-tee" for the Cortex-M4 coprocessor management by secure context reg: description: @@ -43,6 +48,10 @@ properties: - description: The offset of the hold boot setting register - description: The field mask of the hold boot + st,proc-id: + description: remote processor identifier + $ref: /schemas/types.yaml#/definitions/uint32 + st,syscfg-tz: deprecated: true description: @@ -142,21 +151,43 @@ properties: required: - compatible - reg - - resets allOf: - if: properties: - reset-names: - not: - contains: - const: hold_boot + compatible: + contains: + const: st,stm32mp1-m4 then: + if: + properties: + reset-names: + not: + contains: + const: hold_boot + then: + required: + - st,syscfg-holdboot + else: + properties: + st,syscfg-holdboot: false + required: + - reset-names required: - - st,syscfg-holdboot - else: + - resets + + - if: + properties: + compatible: + contains: + const: st,stm32mp1-m4-tee + then: properties: st,syscfg-holdboot: false + reset-names: false + resets: false + required: + - st,proc-id additionalProperties: false @@ -188,5 +219,16 @@ examples: st,syscfg-rsc-tbl = <&tamp 0x144 0xFFFFFFFF>; st,syscfg-m4-state = <&tamp 0x148 0xFFFFFFFF>; }; + - | + #include <dt-bindings/reset/stm32mp1-resets.h> + m4@10000000 { + compatible = "st,stm32mp1-m4-tee"; + reg = <0x10000000 0x40000>, + <0x30000000 0x40000>, + <0x38000000 0x10000>; + st,proc-id = <0>; + st,syscfg-rsc-tbl = <&tamp 0x144 0xFFFFFFFF>; + st,syscfg-m4-state = <&tamp 0x148 0xFFFFFFFF>; + }; ...
The "st,stm32mp1-m4-tee" compatible is utilized in a system configuration where the Cortex-M4 firmware is loaded by the Trusted Execution Environment (TEE). For instance, this compatible is used in both the Linux and OP-TEE device trees: - In OP-TEE, a node is defined in the device tree with the "st,stm32mp1-m4-tee" compatible to support signed remoteproc firmware. Based on DT properties, the OP-TEE remoteproc framework is initiated to expose a trusted application service to authenticate and load the remote processor firmware provided by the Linux remoteproc framework, as well as to start and stop the remote processor. - In Linux, when the compatibility is set, the Cortex-M resets should not be declared in the device tree. In such a configuration, the reset is managed by the OP-TEE remoteproc driver and is no longer accessible from the Linux kernel. Associated with this new compatible, add the "st,proc-id" property to identify the remote processor. This ID is used to define a unique ID, common between Linux, U-Boot, and OP-TEE, to identify a coprocessor. This ID will be used in requests to the OP-TEE remoteproc Trusted Application to specify the remote processor. Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com> --- update vs previous version - merge [PATCH v5 4/7] remoteproc: core introduce rproc_set_rsc_table_on_start function as new "st,proc-id" is associated to "st,stm32mp1-m4-tee" compatible - update commit message - remove Reviewed-by: Rob Herring <robh@kernel.org> as patch is updated --- .../bindings/remoteproc/st,stm32-rproc.yaml | 58 ++++++++++++++++--- 1 file changed, 50 insertions(+), 8 deletions(-)