From: "Clément Léger" <cleger@rivosinc.com>
To: 7626f978-e9ea-4f8f-b814-aeac02bd3712@rivosinc.com
Cc: Evan Green <evan@rivosinc.com>,
linux-riscv@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
Palmer Dabbelt <palmer@rivosinc.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Albert Ou <aou@eecs.berkeley.edu>,
Jonathan Corbet <corbet@lwn.net>,
Andrew Jones <ajones@ventanamicro.com>,
Conor Dooley <conor@kernel.org>,
Samuel Ortiz <sameo@rivosinc.com>
Subject: Re: [PATCH v2 05/19] riscv: add ISA extension parsing for vector crypto extensions
Date: Mon, 23 Oct 2023 09:14:45 +0200 [thread overview]
Message-ID: <c64d9ddb-edbd-4c8f-b56f-1b90d82100b7@rivosinc.com> (raw)
In-Reply-To: <E30E7352-1FB0-4DB5-94C3-2C6FC2A6F484@sifive.com>
On 20/10/2023 04:43, Jerry Shih wrote:
> On Oct 19, 2023, at 17:35, Clément Léger <cleger@rivosinc.com> wrote:
>> On 18/10/2023 19:26, Evan Green wrote:
>>> On Wed, Oct 18, 2023 at 5:53 AM Clément Léger <cleger@rivosinc.com> wrote:
>>>>
>>>> On 18/10/2023 03:45, Jerry Shih wrote:
>>>>>
>>>>> The `Zvkb` is the subset of `Zvbb`[1]. So, the `Zvkb` should be bundled with `Zvbb`.
>>>>
>>>> Hi Jerry,
>>>>
>>>> Thanks for catching this, I think some other extensions will fall in
>>>> this category as well then (Zvknha/Zvknhb). I will verify that.
>>>
>>> The bundling mechanism works well when an extension is a pure lasso
>>> around other extensions. We'd have to tweak that code if we wanted to
>>> support cases like this, where the extension is a superset of others,
>>> but also contains loose change not present anywhere else (and
>>> therefore also needs to stand as a separate bit).
>>
>> For Zvbb and Zvknhb, I used the following code:
>>
>> static const unsigned int riscv_zvbb_bundled_exts[] = {
>> RISCV_ISA_EXT_ZVKB,
>> RISCV_ISA_EXT_ZVBB
>> };
>>
>> static const unsigned int riscv_zvknhb_bundled_exts[] = {
>> RISCV_ISA_EXT_ZVKNHA,
>> RISCV_ISA_EXT_ZVKNHB
>> };
>>
>> Which correctly results in both extension (superset + base set) being
>> enabled when only one is set. Is there something that I'm missing ?
>
> We should not bundle zvknha and zvknhb together. They are exclusive.
Yes, but for instance, what happens if the user query the zvknha (if it
only needs SHA256) but zvknhb is present. If we don't declare zvknha,
then it will fail but the support would actually be present due to
zvknhb being there.
Clément
> Please check:
> https://github.com/riscv/riscv-crypto/issues/364#issuecomment-1726782096
>
> -Jerry
>
next prev parent reply other threads:[~2023-10-23 7:14 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-17 13:14 [PATCH v2 00/19] riscv: report more ISA extensions through hwprobe Clément Léger
2023-10-17 13:14 ` [PATCH v2 01/19] riscv: hwprobe: factorize hwprobe ISA extension reporting Clément Léger
2023-10-18 17:24 ` Evan Green
2023-10-18 17:33 ` Conor Dooley
2023-10-18 17:36 ` Conor Dooley
2023-10-18 17:45 ` Evan Green
2023-10-19 9:46 ` Clément Léger
2023-10-19 10:24 ` Conor Dooley
2023-10-19 15:58 ` Evan Green
2023-10-19 7:26 ` Clément Léger
2023-10-19 10:22 ` Conor Dooley
2023-10-19 12:29 ` Clément Léger
2023-10-20 10:27 ` Andrew Jones
2023-10-17 13:14 ` [PATCH v2 02/19] riscv: add ISA extension parsing for scalar crypto Clément Léger
2023-10-23 16:21 ` Evan Green
2023-10-24 7:18 ` Clément Léger
2023-10-24 9:30 ` Clément Léger
2023-10-24 16:37 ` Evan Green
2023-10-24 18:11 ` Clément Léger
2023-10-17 13:14 ` [PATCH v2 03/19] riscv: hwprobe: add support for scalar crypto ISA extensions Clément Léger
2023-10-18 17:24 ` Evan Green
2023-10-19 7:21 ` Clément Léger
2023-10-17 13:14 ` [PATCH v2 04/19] dt-bindings: riscv: add scalar crypto ISA extensions description Clément Léger
2023-10-17 13:14 ` [PATCH v2 05/19] riscv: add ISA extension parsing for vector crypto extensions Clément Léger
2023-10-18 1:45 ` Jerry Shih
2023-10-18 12:52 ` Clément Léger
2023-10-18 17:26 ` Evan Green
2023-10-19 9:35 ` Clément Léger
2023-10-19 15:33 ` Conor Dooley
2023-10-19 16:19 ` Evan Green
2023-10-23 7:24 ` Clément Léger
2023-10-23 16:18 ` Evan Green
2023-10-20 2:43 ` Jerry Shih
2023-10-23 7:14 ` Clément Léger [this message]
2023-10-17 13:14 ` [PATCH v2 06/19] riscv: hwprobe: export vector crypto ISA extensions Clément Léger
2023-10-18 17:27 ` Evan Green
2023-10-17 13:14 ` [PATCH v2 07/19] dt-bindings: riscv: add vector crypto ISA extensions description Clément Léger
2023-10-17 13:14 ` [PATCH v2 08/19] riscv: add ISA extension parsing for Zfh/Zfhmin Clément Léger
2023-10-18 17:28 ` Evan Green
2023-10-17 13:14 ` [PATCH v2 09/19] riscv: hwprobe: export Zfh/Zfhmin ISA extensions Clément Léger
2023-10-18 17:28 ` Evan Green
2023-10-17 13:14 ` [PATCH v2 10/19] dt-bindings: riscv: add Zfh[min] ISA extensions description Clément Léger
2023-10-17 13:14 ` [PATCH v2 11/19] riscv: add ISA extension parsing for Zihintntl Clément Léger
2023-10-18 17:28 ` Evan Green
2023-10-17 13:14 ` [PATCH v2 12/19] riscv: hwprobe: export Zhintntl ISA extension Clément Léger
2023-10-18 17:28 ` Evan Green
2023-10-17 13:14 ` [PATCH v2 13/19] dt-bindings: riscv: add Zihintntl ISA extension description Clément Léger
2023-10-17 13:14 ` [PATCH v2 14/19] riscv: add ISA extension parsing for Zvfh[min] Clément Léger
2023-10-18 17:28 ` Evan Green
2023-10-17 13:14 ` [PATCH v2 15/19] riscv: hwprobe: export Zvfh[min] ISA extensions Clément Léger
2023-10-18 17:28 ` Evan Green
2023-10-17 13:14 ` [PATCH v2 16/19] dt-bindings: riscv: add Zvfh[min] ISA extension description Clément Léger
2023-10-17 13:14 ` [PATCH v2 17/19] riscv: add ISA extension parsing for Zfa Clément Léger
2023-10-18 17:28 ` Evan Green
2023-10-17 13:14 ` [PATCH v2 18/19] riscv: hwprobe: export Zfa ISA extension Clément Léger
2023-10-18 17:28 ` Evan Green
2023-10-17 13:14 ` [PATCH v2 19/19] dt-bindings: riscv: add Zfa ISA extension description Clément Léger
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