Re: [PATCH v5 06/16] dt-bindings: riscv: add Zca, Zcf, Zcd and Zcb ISA extension description

On Fri, May 17, 2024 at 04:52:46PM +0200, Clément Léger wrote:

Add description for Zca, Zcf, Zcd and Zcb extensions which are part the Zc* standard extensions for code size reduction. Additional validation rules are added since Zcb depends on Zca, Zcf, depends on Zca and F, Zcd depends on Zca and D and finally, Zcf can not be present on rv64.

Signed-off-by: Clément Léger cleger@rivosinc.com Reviewed-by: Conor Dooley conor.dooley@microchip.com

---

.../devicetree/bindings/riscv/extensions.yaml | 78 +++++++++++++++++++ 1 file changed, 78 insertions(+)

diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml index b9100addeb90..39084c58d4e4 100644 --- a/Documentation/devicetree/bindings/riscv/extensions.yaml +++ b/Documentation/devicetree/bindings/riscv/extensions.yaml @@ -220,6 +220,38 @@ properties: instructions as ratified at commit 6d33919 ("Merge pull request #158 from hirooih/clmul-fix-loop-end-condition") of riscv-bitmanip.

•    - const: zca
  

•      description: |
  

•        The Zca extension part of Zc* standard extensions for code size
  

•        reduction, as ratified in commit 8be3419c1c0 ("Zcf doesn't exist on
  

•        RV64 as it contains no instructions") of riscv-code-size-reduction,
  

•        merged in the riscv-isa-manual by commit dbc79cf28a2 ("Initial seed
  

•        of zc.adoc to src tree.").
  

•    - const: zcb
  

•      description: |
  

•        The Zcb extension part of Zc* standard extensions for code size
  

•        reduction, as ratified in commit 8be3419c1c0 ("Zcf doesn't exist on
  

•        RV64 as it contains no instructions") of riscv-code-size-reduction,
  

•        merged in the riscv-isa-manual by commit dbc79cf28a2 ("Initial seed
  

•        of zc.adoc to src tree.").
  

•    - const: zcd
  

•      description: |
  

•        The Zcd extension part of Zc* standard extensions for code size
  

•        reduction, as ratified in commit 8be3419c1c0 ("Zcf doesn't exist on
  

•        RV64 as it contains no instructions") of riscv-code-size-reduction,
  

•        merged in the riscv-isa-manual by commit dbc79cf28a2 ("Initial seed
  

•        of zc.adoc to src tree.").
  

•    - const: zcf
  

•      description: |
  

•        The Zcf extension part of Zc* standard extensions for code size
  

•        reduction, as ratified in commit 8be3419c1c0 ("Zcf doesn't exist on
  

•        RV64 as it contains no instructions") of riscv-code-size-reduction,
  

•        merged in the riscv-isa-manual by commit dbc79cf28a2 ("Initial seed
  

•        of zc.adoc to src tree.").
  

•    - const: zfa
       description:
         The standard Zfa extension for additional floating point
  

@@ -499,5 +531,51 @@ properties: The T-HEAD specific 0.7.1 vector implementation as written in https://github.com/T-head-Semi/thead-extension-spec/blob/95358cb2cca9489361c....

• allOf:

•  # Zcb depends on Zca
  

•  - if:
  

•      contains:
  

•        const: zcb
  

•    then:
  

•      contains:
  

•        const: zca
  

•  # Zcd depends on Zca and D
  

•  - if:
  

•      contains:
  

•        const: zcd
  

•    then:
  

•      allOf:
  

•        - contains:
  

•            const: zca
  

•        - contains:
  

•            const: d
  

•  # Zcf depends on Zca and F
  

•  - if:
  

•      contains:
  

•        const: zcf
  

•    then:
  

•      allOf:
  

•        - contains:
  

•            const: zca
  

•        - contains:
  

•            const: f
  

+allOf:

• # Zcf extension does not exist on rv64
• • if:

•  properties:
  

•    riscv,isa-extensions:
  

•      contains:
  

•        const: zcf
  

•    riscv,isa-base:
  

•      contains:
  

•        const: rv64i
  

• then:

•  properties:
  

•    riscv,isa-extensions:
  

•      not:
  

•        contains:
  

•          const: zcf
  

additionalProperties: true ... -- 2.43.0

---

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Reviewed-by: Charlie Jenkins charlie@rivosinc.com