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Date: Thu, 13 Jun 2024 15:34:58 +0100
From: Conor Dooley <conor@kernel.org>
To: Charlie Jenkins <charlie@rivosinc.com>
Cc: Rob Herring <robh@kernel.org>, Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Jisheng Zhang <jszhang@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Samuel Holland <samuel@sholland.org>,
	Jonathan Corbet <corbet@lwn.net>, Shuah Khan <shuah@kernel.org>,
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	Jessica Clarke <jrtc27@jrtc27.com>, linux-riscv@lists.infradead.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-sunxi@lists.linux.dev, linux-doc@vger.kernel.org,
	linux-kselftest@vger.kernel.org
Subject: Re: [PATCH v2 02/13] dt-bindings: cpus: add a thead vlen register
 length property
Message-ID: <20240613-gauntlet-starlet-2aedade31a06@spud>
References: <20240610-xtheadvector-v2-0-97a48613ad64@rivosinc.com>
 <20240610-xtheadvector-v2-2-97a48613ad64@rivosinc.com>
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On Mon, Jun 10, 2024 at 03:56:39PM -0700, Charlie Jenkins wrote:
> Add a property analogous to the vlenb CSR so that software can detect
> the vector length of each CPU prior to it being brought online.
> Currently software has to assume that the vector length read from the
> boot CPU applies to all possible CPUs. On T-Head CPUs implementing
> pre-ratification vector, reading the th.vlenb CSR may produce an illegal
> instruction trap, so this property is required on such systems.
>=20
> Signed-off-by: Charlie Jenkins <charlie@rivosinc.com>

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>

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