linux-kernel - Re: [PATCH v2 03/19] riscv: hwprobe: add support for scalar crypto ISA extensions

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Message-ID: <be86086b-7b1e-48b5-98e1-e1cd077cf3bb@rivosinc.com>
Date:   Thu, 19 Oct 2023 09:21:05 +0200
From:   Clément Léger <cleger@...osinc.com>
To:     Evan Green <evan@...osinc.com>
Cc:     linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        Palmer Dabbelt <palmer@...osinc.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Jonathan Corbet <corbet@....net>,
        Andrew Jones <ajones@...tanamicro.com>,
        Conor Dooley <conor@...nel.org>,
        Samuel Ortiz <sameo@...osinc.com>
Subject: Re: [PATCH v2 03/19] riscv: hwprobe: add support for scalar crypto
 ISA extensions



On 18/10/2023 19:24, Evan Green wrote:
> On Tue, Oct 17, 2023 at 6:15 AM Clément Léger <cleger@...osinc.com> wrote:
>>
>> Export the following scalar crypto extensions through hwprobe:
>>
>> - Zbkb
>> - Zbkc
>> - Zbkx
>> - Zknd
>> - Zkne
>> - Zknh
>> - Zksed
>> - Zksh
>> - Zkt
>>
>> Signed-off-by: Clément Léger <cleger@...osinc.com>
>> ---
>>  Documentation/riscv/hwprobe.rst       | 30 +++++++++++++++++++++++++++
>>  arch/riscv/include/uapi/asm/hwprobe.h | 10 +++++++++
>>  arch/riscv/kernel/sys_riscv.c         | 10 +++++++++
>>  3 files changed, 50 insertions(+)
>>
>> diff --git a/Documentation/riscv/hwprobe.rst b/Documentation/riscv/hwprobe.rst
>> index a52996b22f75..968895562d42 100644
>> --- a/Documentation/riscv/hwprobe.rst
>> +++ b/Documentation/riscv/hwprobe.rst
>> @@ -77,6 +77,36 @@ The following keys are defined:
>>    * :c:macro:`RISCV_HWPROBE_EXT_ZBS`: The Zbs extension is supported, as defined
>>         in version 1.0 of the Bit-Manipulation ISA extensions.
>>
>> +  * :c:macro:`RISCV_HWPROBE_EXT_ZBC` The Zbc extension is supported, as defined
>> +       in version 1.0 of the Scalar Crypto ISA extensions.
> 
> At least in my v1.0.1 version of the crypto scalar spec, I don't see
> Zbc. That seems to be defined in the bit manipulation extensions.

Thanks for catching this, this should be same than the previous line. I
will actually move the ZBC on another patch since it is not scalar crypto.

Clément