linux-kernel - Re: [PATCH v2 5/5] dt-bindings: riscv: document vector crypto requirements

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Message-ID: <20241025022411.GB1781@sol.localdomain>
Date: Thu, 24 Oct 2024 19:24:11 -0700
From: Eric Biggers <ebiggers@...nel.org>
To: Conor Dooley <conor@...nel.org>
Cc: linux-riscv@...ts.infradead.org,
	Conor Dooley <conor.dooley@...rochip.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Clément Léger <cleger@...osinc.com>,
	Andy Chiu <andybnac@...il.com>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH v2 5/5] dt-bindings: riscv: document vector crypto
 requirements

On Thu, Oct 24, 2024 at 01:34:33PM +0100, Conor Dooley wrote:
> From: Conor Dooley <conor.dooley@...rochip.com>
> 
> Section 35.2. Extensions Overview of [1] says:
> | The Zvknhb and Zvbc Vector Crypto Extensions --and accordingly the composite extensions Zvkn and
> | Zvks-- (sic) require a Zve64x base, or application ("V") base Vector Extension.
> | All of the other Vector Crypto Extensions can be built on any embedded (Zve*) or application ("V") base
> | Vector Extension
> 
> Apply these rules in the binding, so that invalid combinations can be
> avoided.

It looks like that part of the spec is wrong, though.  The Zvknhb and Zvbc are
correct, but the list of the composite extensions that at least one of them is
included in is: Zvkn, Zvknc, Zvkng, Zvksc.

- Eric