* [RFC] dt-bindings: riscv: enum for riscv,isa
@ 2021-04-06 19:05 Heinrich Schuchardt
2021-04-23 3:32 ` Palmer Dabbelt
0 siblings, 1 reply; 2+ messages in thread
From: Heinrich Schuchardt @ 2021-04-06 19:05 UTC (permalink / raw)
To: Rob Herring, Paul Walmsley, Palmer Dabbelt, Albert Ou
Cc: linux-kernel, linux-riscv, devicetree
In Documentation/devicetree/bindings/riscv/cpus.yaml I find for riscv,isa:
enum:
- rv64imac
- rv64imafdc
This implies that 'rv64imafc' or 'rv64imafdqc' would be illegal values
while these combinations of extensions would be compliant with "The
RISC-V Instruction Set Manual".
To me it does not make much sense to try to enumerate all permissible
permutations of RISC-V extensions.
Shouldn't this enum be removed and replaced by examples?
Best regards
Heinrich
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [RFC] dt-bindings: riscv: enum for riscv,isa
2021-04-06 19:05 [RFC] dt-bindings: riscv: enum for riscv,isa Heinrich Schuchardt
@ 2021-04-23 3:32 ` Palmer Dabbelt
0 siblings, 0 replies; 2+ messages in thread
From: Palmer Dabbelt @ 2021-04-23 3:32 UTC (permalink / raw)
To: xypron.glpk
Cc: robh+dt, Paul Walmsley, aou, linux-kernel, linux-riscv, devicetree
On Tue, 06 Apr 2021 12:05:34 PDT (-0700), xypron.glpk@gmx.de wrote:
> In Documentation/devicetree/bindings/riscv/cpus.yaml I find for riscv,isa:
>
> enum:
> - rv64imac
> - rv64imafdc
>
> This implies that 'rv64imafc' or 'rv64imafdqc' would be illegal values
> while these combinations of extensions would be compliant with "The
> RISC-V Instruction Set Manual".
>
> To me it does not make much sense to try to enumerate all permissible
> permutations of RISC-V extensions.
>
> Shouldn't this enum be removed and replaced by examples?
I'm generally OK with that, but I'm not sure how to do it: won't we fail
the scheme checks if we don't have something defined for "riscv,isa"?
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-04-06 19:05 [RFC] dt-bindings: riscv: enum for riscv,isa Heinrich Schuchardt
2021-04-23 3:32 ` Palmer Dabbelt
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