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Tue, 29 Apr 2025 22:47:42 -0700 (PDT) Received: from [192.168.68.51] ([180.233.125.65]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-74039a3100dsm787733b3a.90.2025.04.29.22.47.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 29 Apr 2025 22:47:41 -0700 (PDT) Message-ID: <9c998d71-0368-4f93-ab37-7933bec9b419@redhat.com> Date: Wed, 30 Apr 2025 15:47:33 +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 09/43] KVM: arm64: Allow passing machine type in KVM creation To: Steven Price , kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: 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> <20250416134208.383984-10-steven.price@arm.com> Content-Language: en-US From: Gavin Shan In-Reply-To: <20250416134208.383984-10-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: > Previously machine type was used purely for specifying the physical > address size of the guest. Reserve the higher bits to specify an ARM > specific machine type and declare a new type 'KVM_VM_TYPE_ARM_REALM' > used to create a realm guest. > > Reviewed-by: Suzuki K Poulose > Signed-off-by: Steven Price > --- > Changes since v7: > * Add some documentation explaining the new machine type. > Changes since v6: > * Make the check for kvm_rme_is_available more visible and report an > error code of -EPERM (instead of -EINVAL) to make it explicit that > the kernel supports RME, but the platform doesn't. > --- > Documentation/virt/kvm/api.rst | 16 ++++++++++++++-- > arch/arm64/kvm/arm.c | 15 +++++++++++++++ > arch/arm64/kvm/mmu.c | 3 --- > include/uapi/linux/kvm.h | 19 +++++++++++++++---- > 4 files changed, 44 insertions(+), 9 deletions(-) > Reviewed-by: Gavin Shan