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AJvYcCXQ7AQFMcpDsJY1UZKkG3D+hqpbKqMUDCmfKOSaRB/cDrTLocSi03M8ks8GNfsbt4ojK60+C0zr2g==@kvack.org X-Gm-Message-State: AOJu0YxHUmrrReNtjFSIu6vvEsh473oLR8AtvkCaK+veE/xRGzaEtCtA mqoOPXYRyqXNiZX1RV3LTwk1XpumKDjpN7vC/6OnfW1GRdBLe4eCF7z/bDyWu6UgtCgyDWW6QCx PhSUHUA== X-Google-Smtp-Source: AGHT+IEApMeiGDIZ/SFpUW2e3JmrB7W0fF4MD+T+mdNXkLycwiEroA69CQKBQvTSE7/cFMGNJoFgS1F9IcQ= X-Received: from pjbof11.prod.google.com ([2002:a17:90b:39cb:b0:311:ef56:7694]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:19eb:b0:235:f3df:bc1f with SMTP id d9443c01a7336-2382406877amr54160135ad.36.1750860424524; Wed, 25 Jun 2025 07:07:04 -0700 (PDT) Date: Wed, 25 Jun 2025 07:07:02 -0700 In-Reply-To: Mime-Version: 1.0 References: <20250611133330.1514028-1-tabba@google.com> <80e062dd-2445-45a6-ba4a-8f5fe3286909@redhat.com> <372bbfa5-1869-4bf2-9c16-0b828cdb86f5@redhat.com> <11b23ea3-cadd-442b-88d7-491bba99dabe@redhat.com> Message-ID: Subject: Re: [PATCH v12 00/18] KVM: Mapping guest_memfd backed memory at the host for software protected VMs From: Sean Christopherson To: Fuad Tabba Cc: David Hildenbrand , kvm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-mm@kvack.org, kvmarm@lists.linux.dev, pbonzini@redhat.com, chenhuacai@kernel.org, mpe@ellerman.id.au, anup@brainfault.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, 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, 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 Content-Type: text/plain; charset="us-ascii" X-Stat-Signature: cihpi699wxze9cjxpakimouboax5cpkx X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: E27814001B X-Rspam-User: X-HE-Tag: 1750860425-361838 X-HE-Meta: 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 JhcmiaHg 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, 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 Wed, Jun 25, 2025, Fuad Tabba wrote: > Got it. So, to summarize again: > > In struct kvm_arch: add `bool supports_gmem` instead of renaming > `bool has_private_mem` > > The guest_memfd flag GUEST_MEMFD_FLAG_SUPPORT_SHARED becomes > GUEST_MEMFD_FLAG_MMAP > > The memslot internal flag KVM_MEMSLOT_SUPPORTS_GMEM_SHARED becomes > KVM_MEMSLOT_GMEM_ONLY > > kvm_gmem_memslot_supports_shared() becomes kvm_memslot_is_gmem_only() > > kvm_arch_supports_gmem_shared_mem() becomes kvm_arch_supports_gmem_mmap() > > kvm_gmem_fault_shared(struct vm_fault *vmf) becomes > kvm_gmem_fault_user_mapping(struct vm_fault *vmf) > > The capability KVM_CAP_GMEM_SHARED_MEM becomes KVM_CAP_GMEM_MMAP > > The Kconfig CONFIG_KVM_GMEM_SHARED_MEM becomes CONFIG_KVM_GMEM_SUPPORTS_MMAP > > What will stay the same as V12: > > CONFIG_KVM_PRIVATE_MEM becomes CONFIG_KVM_GMEM > > CONFIG_KVM_GENERIC_PRIVATE_MEM becomes CONFIG_KVM_GENERIC_GMEM_POPULATE > > kvm_slot_can_be_private() becomes kvm_slot_has_gmem() LGTM!