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[175.34.62.5]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-23506bd8e2dsm116565275ad.56.2025.06.05.02.59.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 05 Jun 2025 02:59:20 -0700 (PDT) Message-ID: <0b329f63-dbb6-4652-b598-2b07bd4f5e67@redhat.com> Date: Thu, 5 Jun 2025 19:59:00 +1000 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v10 15/16] KVM: Introduce the KVM capability KVM_CAP_GMEM_SHARED_MEM 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, isaku.yamahata@intel.com, mic@digikod.net, vbabka@suse.cz, vannapurve@google.com, ackerleytng@google.com, mail@maciej.szmigiero.name, david@redhat.com, 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, peterx@redhat.com, pankaj.gupta@amd.com, ira.weiny@intel.com References: <20250527180245.1413463-1-tabba@google.com> <20250527180245.1413463-16-tabba@google.com> Content-Language: en-US From: Gavin Shan In-Reply-To: <20250527180245.1413463-16-tabba@google.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 5/28/25 4:02 AM, Fuad Tabba wrote: > This patch introduces the KVM capability KVM_CAP_GMEM_SHARED_MEM, which > indicates that guest_memfd supports shared memory (when enabled by the > flag). This support is limited to certain VM types, determined per > architecture. > > This patch also updates the KVM documentation with details on the new > capability, flag, and other information about support for shared memory > in guest_memfd. > > Reviewed-by: David Hildenbrand > Signed-off-by: Fuad Tabba > --- > Documentation/virt/kvm/api.rst | 9 +++++++++ > include/uapi/linux/kvm.h | 1 + > virt/kvm/kvm_main.c | 4 ++++ > 3 files changed, 14 insertions(+) > Reviewed-by: Gavin Shan