[0/2] arm64/fp: Initialise all bits in vector control registers to known values

Message ID	20240213-arm64-fp-init-vec-cr-v1-0-7e7c2d584f26@kernel.org
Headers	Received-SPF: pass (google.com: domain of linux-kernel+bounces-63810-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) client-ip=2604:1380:45d1:ec00::1; From: Mark Brown <broonie@kernel.org> Subject: [PATCH 0/2] arm64/fp: Initialise all bits in vector control registers to known values Date: Tue, 13 Feb 2024 15:32:44 +0000 Message-Id: <20240213-arm64-fp-init-vec-cr-v1-0-7e7c2d584f26@kernel.org> Precedence: bulk MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit To: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org> Cc: Dave Martin <Dave.Martin@arm.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mark Brown <broonie@kernel.org>
Series	arm64/fp: Initialise all bits in vector control registers to known values \| [0/2] arm64/fp: Initialise all bits in vector control registers to known values [1/2] arm64/sve: Ensure that all fields in ZCR_EL1 are set to known values [2/2] arm64/sme: Ensure that all fields in SMCR_EL1 are set to known values

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20240213-arm64-fp-init-vec-cr-v1-0-7e7c2d584f26@kernel.org

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From: Mark Brown <broonie@kernel.org>
Subject: [PATCH 0/2] arm64/fp: Initialise all bits in vector control
 registers to known values
Date: Tue, 13 Feb 2024 15:32:44 +0000
Message-Id: <20240213-arm64-fp-init-vec-cr-v1-0-7e7c2d584f26@kernel.org>
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To: Catalin Marinas <catalin.marinas@arm.com>,
 Will Deacon <will@kernel.org>
Cc: Dave Martin <Dave.Martin@arm.com>, linux-arm-kernel@lists.infradead.org,
 linux-kernel@vger.kernel.org, Mark Brown <broonie@kernel.org>

Series

arm64/fp: Initialise all bits in vector control registers to known values |

Message

Mark Brown Feb. 13, 2024, 3:32 p.m. UTC

  We currently do read/modify/write sequences whenever we update fields in
ZCR_EL1 and SMCR_EL1 so fields we are not explicitly handling will not
be initialised to known values, fix this.  The EL2 registers are already
fully configured.

Signed-off-by: Mark Brown <broonie@kernel.org>
---
Mark Brown (2):
      arm64/sve: Ensure that all fields in ZCR_EL1 are set to known values
      arm64/sme: Ensure that all fields in SMCR_EL1 are set to known values

 arch/arm64/kernel/fpsimd.c | 5 +++++
 1 file changed, 5 insertions(+)
---
base-commit: 54be6c6c5ae8e0d93a6c4641cb7528eb0b6ba478
change-id: 20240212-arm64-fp-init-vec-cr-018449327500

Best regards,

Comments

Catalin Marinas Feb. 22, 2024, 10:04 p.m. UTC | #1

On Tue, 13 Feb 2024 15:32:44 +0000, Mark Brown wrote:
> We currently do read/modify/write sequences whenever we update fields in
> ZCR_EL1 and SMCR_EL1 so fields we are not explicitly handling will not
> be initialised to known values, fix this.  The EL2 registers are already
> fully configured.
> 
> 

Applied to arm64 (for-next/misc), thanks!

[1/2] arm64/sve: Ensure that all fields in ZCR_EL1 are set to known values
      https://git.kernel.org/arm64/c/2f0090549b64
[2/2] arm64/sme: Ensure that all fields in SMCR_EL1 are set to known values
      https://git.kernel.org/arm64/c/93576e349887