linux-kernel - Re: [PATCH v2 01/10] dt-bindings: riscv: Add pointer masking ISA extensions

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Message-ID: <acd4c562-1f4f-4cd0-8ff8-e24e3e70d25e@sifive.com>
Date: Wed, 26 Jun 2024 11:14:27 -0500
From: Samuel Holland <samuel.holland@...ive.com>
To: Conor Dooley <conor@...nel.org>
Cc: Palmer Dabbelt <palmer@...belt.com>, linux-riscv@...ts.infradead.org,
 devicetree@...r.kernel.org, Catalin Marinas <catalin.marinas@....com>,
 linux-kernel@...r.kernel.org, Anup Patel <anup@...infault.org>,
 kasan-dev@...glegroups.com, Atish Patra <atishp@...shpatra.org>,
 Evgenii Stepanov <eugenis@...gle.com>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Rob Herring <robh+dt@...nel.org>,
 "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: Re: [PATCH v2 01/10] dt-bindings: riscv: Add pointer masking ISA
 extensions

Hi Conor,

On 2024-06-26 11:01 AM, Conor Dooley wrote:
> On Tue, Jun 25, 2024 at 02:09:12PM -0700, Samuel Holland wrote:
>> The RISC-V Pointer Masking specification defines three extensions:
>> Smmpm, Smnpm, and Ssnpm. Document the behavior of these extensions as
>> following the current draft of the specification, which is 1.0.0-rc2.
> 
> You say draft, but the actual extension has already completed public
> review, right?

Correct. The spec is frozen, and public review is complete. Here's the tracking
ticket for details: https://jira.riscv.org/browse/RVS-1111

I use the word draft because it is still an -rc version, but I can reword this
if you prefer.

Regards,
Samuel

>> Signed-off-by: Samuel Holland <samuel.holland@...ive.com>
>> ---
>>
>> Changes in v2:
>>  - Update pointer masking specification version reference
>>
>>  .../devicetree/bindings/riscv/extensions.yaml  | 18 ++++++++++++++++++
>>  1 file changed, 18 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
>> index cfed80ad5540..b6aeedc53676 100644
>> --- a/Documentation/devicetree/bindings/riscv/extensions.yaml
>> +++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
>> @@ -128,6 +128,18 @@ properties:
>>              changes to interrupts as frozen at commit ccbddab ("Merge pull
>>              request #42 from riscv/jhauser-2023-RC4") of riscv-aia.
>>  
>> +        - const: smmpm
>> +          description: |
>> +            The standard Smmpm extension for M-mode pointer masking as defined
>> +            at commit 654a5c4a7725 ("Update PDF and version number.") of
>> +            riscv-j-extension.
>> +
>> +        - const: smnpm
>> +          description: |
>> +            The standard Smnpm extension for next-mode pointer masking as defined
>> +            at commit 654a5c4a7725 ("Update PDF and version number.") of
>> +            riscv-j-extension.
>> +
>>          - const: smstateen
>>            description: |
>>              The standard Smstateen extension for controlling access to CSRs
>> @@ -147,6 +159,12 @@ properties:
>>              and mode-based filtering as ratified at commit 01d1df0 ("Add ability
>>              to manually trigger workflow. (#2)") of riscv-count-overflow.
>>  
>> +        - const: ssnpm
>> +          description: |
>> +            The standard Ssnpm extension for next-mode pointer masking as defined
>> +            at commit 654a5c4a7725 ("Update PDF and version number.") of
>> +            riscv-j-extension.
>> +
>>          - const: sstc
>>            description: |
>>              The standard Sstc supervisor-level extension for time compare as
>> -- 
>> 2.44.1
>>