2022-11-24 13:26:42

by Conor Dooley

Subject: [PATCH 1/2] dt-bindings: riscv: fix underscore requirement for addtional standard extensions

The RISC-V ISA Manual allows for the first Additional Standard
Extension having no leading underscore. Only if there are multiple
Additional Standard Extensions is it needed to have an underscore.

The dt-binding does not validate that a multi-letter extension is
canonically ordered, as that'd need an even worse regex than is here,
but it should not fail validation for valid ISA strings.

Allow the first Z multi-letter extension to appear immediately prior
after the single-letter extensions.

Link: https://github.com/riscv/riscv-isa-manual/releases/tag/riscv-unpriv-pdf-from-asciidoc-15112022 # Chapter 29.5
Fixes: 299824e68bd0 ("dt-bindings: riscv: add new riscv,isa strings for emulators")
Signed-off-by: Conor Dooley <[email protected]>
---
Documentation/devicetree/bindings/riscv/cpus.yaml | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml
index 90a7cabf58fe..e80c967a4fa4 100644
--- a/Documentation/devicetree/bindings/riscv/cpus.yaml
+++ b/Documentation/devicetree/bindings/riscv/cpus.yaml
@@ -80,7 +80,7 @@ properties:
insensitive, letters in the riscv,isa string must be all
lowercase to simplify parsing.
$ref: "/schemas/types.yaml#/definitions/string"
- pattern: ^rv(?:64|32)imaf?d?q?c?b?v?k?h?(?:_[hsxz](?:[a-z])+)*$
+ pattern: ^rv(?:64|32)imaf?d?q?c?b?v?k?h?(?:z(?:[a-z])+)?(?:_[hsxz](?:[a-z])+)*$

# RISC-V requires 'timebase-frequency' in /cpus, so disallow it here
timebase-frequency: false
--
2.38.1

2022-11-25 01:41:38

by Guo Ren

Subject: Re: [PATCH 1/2] dt-bindings: riscv: fix underscore requirement for addtional standard extensions

On Thu, Nov 24, 2022 at 9:06 PM Conor Dooley <[email protected]> wrote:
>
> The RISC-V ISA Manual allows for the first Additional Standard
> Extension having no leading underscore. Only if there are multiple
> Additional Standard Extensions is it needed to have an underscore.
>
> The dt-binding does not validate that a multi-letter extension is
> canonically ordered, as that'd need an even worse regex than is here,
> but it should not fail validation for valid ISA strings.
>
> Allow the first Z multi-letter extension to appear immediately prior
> after the single-letter extensions.
>
> Link: https://github.com/riscv/riscv-isa-manual/releases/tag/riscv-unpriv-pdf-from-asciidoc-15112022 # Chapter 29.5
> Fixes: 299824e68bd0 ("dt-bindings: riscv: add new riscv,isa strings for emulators")
> Signed-off-by: Conor Dooley <[email protected]>
> ---
> Documentation/devicetree/bindings/riscv/cpus.yaml | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml
> index 90a7cabf58fe..e80c967a4fa4 100644
> --- a/Documentation/devicetree/bindings/riscv/cpus.yaml
> +++ b/Documentation/devicetree/bindings/riscv/cpus.yaml
> @@ -80,7 +80,7 @@ properties:
> insensitive, letters in the riscv,isa string must be all
> lowercase to simplify parsing.
> $ref: "/schemas/types.yaml#/definitions/string"
> - pattern: ^rv(?:64|32)imaf?d?q?c?b?v?k?h?(?:_[hsxz](?:[a-z])+)*$
> + pattern: ^rv(?:64|32)imaf?d?q?c?b?v?k?h?(?:z(?:[a-z])+)?(?:_[hsxz](?:[a-z])+)*$
Acked-by: Guo Ren <[email protected]>

>
> # RISC-V requires 'timebase-frequency' in /cpus, so disallow it here
> timebase-frequency: false
> --
> 2.38.1
>


--
Best Regards
Guo Ren