Re: [PATCH v8 37/43] arm64: RME: Propagate max SVE vector length from RMM

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To: Steven Price <steven.price@xxxxxxx>, kvm@xxxxxxxxxxxxxxx, kvmarm@xxxxxxxxxxxxxxx
Subject: Re: [PATCH v8 37/43] arm64: RME: Propagate max SVE vector length from RMM
From: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Date: Tue, 20 May 2025 13:50:29 +0100
Cc: Jean-Philippe Brucker <jean-philippe@xxxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Marc Zyngier <maz@xxxxxxxxxx>, Will Deacon <will@xxxxxxxxxx>, James Morse <james.morse@xxxxxxx>, Oliver Upton <oliver.upton@xxxxxxxxx>, Zenghui Yu <yuzenghui@xxxxxxxxxx>, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Joey Gouly <joey.gouly@xxxxxxx>, Alexandru Elisei <alexandru.elisei@xxxxxxx>, Christoffer Dall <christoffer.dall@xxxxxxx>, Fuad Tabba <tabba@xxxxxxxxxx>, linux-coco@xxxxxxxxxxxxxxx, Ganapatrao Kulkarni <gankulkarni@xxxxxxxxxxxxxxxxxxxxxx>, Gavin Shan <gshan@xxxxxxxxxx>, Shanker Donthineni <sdonthineni@xxxxxxxxxx>, Alper Gun <alpergun@xxxxxxxxxx>, "Aneesh Kumar K . V" <aneesh.kumar@xxxxxxxxxx>
In-reply-to: <20250416134208.383984-38-steven.price@arm.com>
References: <20250416134208.383984-1-steven.price@arm.com> <20250416134208.383984-38-steven.price@arm.com>
User-agent: Mozilla Thunderbird

On 16/04/2025 14:41, Steven Price wrote:

From: Jean-Philippe Brucker <jean-philippe@xxxxxxxxxx>

RMM provides the maximum vector length it supports for a guest in its
feature register. Make it visible to the rest of KVM and to userspace
via KVM_REG_ARM64_SVE_VLS.

Signed-off-by: Jean-Philippe Brucker <jean-philippe@xxxxxxxxxx>
Signed-off-by: Steven Price <steven.price@xxxxxxx>


Reviewed-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>

References:
- [PATCH v8 00/43] arm64: Support for Arm CCA in KVM
  - From: Steven Price
- [PATCH v8 37/43] arm64: RME: Propagate max SVE vector length from RMM
  - From: Steven Price

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