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[2003:cb:c706:2000:e44c:bc46:d8d3:be5]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4395a04f8a2sm238630835e9.2.2025.02.20.03.37.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 20 Feb 2025 03:37:34 -0800 (PST) Message-ID: <9abf6dd8-919d-44a4-8352-ee350fec8ad3@redhat.com> Date: Thu, 20 Feb 2025 12:37:32 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 04/11] KVM: guest_memfd: Add KVM capability to check if guest_memfd is shared To: Fuad Tabba , kvm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-mm@kvack.org Cc: pbonzini@redhat.com, chenhuacai@kernel.org, mpe@ellerman.id.au, anup@brainfault.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, seanjc@google.com, viro@zeniv.linux.org.uk, brauner@kernel.org, willy@infradead.org, akpm@linux-foundation.org, xiaoyao.li@intel.com, yilun.xu@intel.com, chao.p.peng@linux.intel.com, jarkko@kernel.org, amoorthy@google.com, dmatlack@google.com, yu.c.zhang@linux.intel.com, isaku.yamahata@intel.com, mic@digikod.net, vbabka@suse.cz, vannapurve@google.com, ackerleytng@google.com, mail@maciej.szmigiero.name, michael.roth@amd.com, wei.w.wang@intel.com, liam.merwick@oracle.com, isaku.yamahata@gmail.com, kirill.shutemov@linux.intel.com, suzuki.poulose@arm.com, steven.price@arm.com, quic_eberman@quicinc.com, quic_mnalajal@quicinc.com, quic_tsoni@quicinc.com, quic_svaddagi@quicinc.com, quic_cvanscha@quicinc.com, quic_pderrin@quicinc.com, quic_pheragu@quicinc.com, catalin.marinas@arm.com, james.morse@arm.com, yuzenghui@huawei.com, oliver.upton@linux.dev, maz@kernel.org, will@kernel.org, qperret@google.com, keirf@google.com, roypat@amazon.co.uk, shuah@kernel.org, hch@infradead.org, jgg@nvidia.com, rientjes@google.com, jhubbard@nvidia.com, fvdl@google.com, hughd@google.com, jthoughton@google.com References: <20250211121128.703390-1-tabba@google.com> <20250211121128.703390-5-tabba@google.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Queue-Id: 7FCA6C0015 X-Rspamd-Server: rspam07 X-Stat-Signature: unuzsa1ftkiuz5pz7rkn6bsam6wj9hyu X-HE-Tag: 1740051461-909864 X-HE-Meta: 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 88g1fLPb 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000006, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 11.02.25 13:11, Fuad Tabba wrote: > Add the KVM capability KVM_CAP_GMEM_SHARED_MEM, which indicates > that the VM supports shared memory in guest_memfd, or that the > host can create VMs that support shared memory. Supporting shared > memory implies that memory can be mapped when shared with the > host. Was there a good reason to not squash this into the next patch? -- Cheers, David / dhildenb