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Wed, 30 Apr 2025 20:50:19 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHjGXYl1nbElt//Y7QO+1qgJyi9H/AWK7L3Z8v+0R5cqVKw1fIlymBvwS8voAmkMjppWWC63Q== X-Received: by 2002:a17:902:ce82:b0:224:e33:889b with SMTP id d9443c01a7336-22e040bf632mr26267185ad.12.1746071419220; Wed, 30 Apr 2025 20:50:19 -0700 (PDT) Received: from [192.168.68.51] ([180.233.125.65]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-22db5100c70sm130601505ad.166.2025.04.30.20.50.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 30 Apr 2025 20:50:18 -0700 (PDT) Message-ID: Date: Thu, 1 May 2025 13:50:10 +1000 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v8 37/43] arm64: RME: Propagate max SVE vector length from RMM To: Steven Price , kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: Jean-Philippe Brucker , Catalin Marinas , Marc Zyngier , Will Deacon , James Morse , Oliver Upton , Suzuki K Poulose , Zenghui Yu , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Joey Gouly , Alexandru Elisei , Christoffer Dall , Fuad Tabba , linux-coco@lists.linux.dev, Ganapatrao Kulkarni , Shanker Donthineni , Alper Gun , "Aneesh Kumar K . V" References: <20250416134208.383984-1-steven.price@arm.com> <20250416134208.383984-38-steven.price@arm.com> Content-Language: en-US From: Gavin Shan In-Reply-To: <20250416134208.383984-38-steven.price@arm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 4/16/25 11:41 PM, Steven Price wrote: > From: Jean-Philippe Brucker > > 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 > Signed-off-by: Steven Price > --- > arch/arm64/include/asm/kvm_host.h | 2 +- > arch/arm64/include/asm/kvm_rme.h | 1 + > arch/arm64/kvm/guest.c | 2 +- > arch/arm64/kvm/reset.c | 12 ++++++++++-- > arch/arm64/kvm/rme.c | 6 ++++++ > 5 files changed, 19 insertions(+), 4 deletions(-) > Reviewed-by: Gavin Shan