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AJvYcCVqGndTahFMWjtL1q0+E8gkkvdbbZ6HFRGW8WfwIvvTARwqZxJI2sBIvI6TOJUU5AF6FnDiMNOLIA==@kvack.org X-Gm-Message-State: AOJu0Yx3voJKzET1kOnEW99jpHo3cfKbm8/WGmbueYEmK2/KowxOMZ96 e+V3O6bvEIjnfiPsYteACTbZaiscKjCvsTy06+9PupP6b2gw+fkCMsYL4A8nPdWYahAWZLOjdg7 rNipTEu2H3Iy2eq5wNsokuAgpRg== X-Google-Smtp-Source: AGHT+IGTLI28yZrk0rADnL8AJRnYpgX7fVX5tQYbza0e4ND5OU4Hj5SMJ3v64nlbDhoh1Pqxs5RCZmim7dvJP9f9Zg== X-Received: from pjbdy13.prod.google.com ([2002:a17:90b:6cd:b0:33b:ce80:9efc]) (user=ackerleytng job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:2e46:b0:335:2823:3683 with SMTP id 98e67ed59e1d1-33bcf953e72mr6347941a91.9.1760731968802; Fri, 17 Oct 2025 13:12:48 -0700 (PDT) Date: Fri, 17 Oct 2025 13:11:53 -0700 In-Reply-To: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.51.0.858.gf9c4a03a3a-goog Message-ID: <36defde6a09d2a7b4ff5507b752546a906b262f9.1760731772.git.ackerleytng@google.com> Subject: [RFC PATCH v1 12/37] KVM: Move KVM_VM_MEMORY_ATTRIBUTES config definition to x86 From: Ackerley Tng To: cgroups@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, x86@kernel.org Cc: ackerleytng@google.com, akpm@linux-foundation.org, binbin.wu@linux.intel.com, bp@alien8.de, brauner@kernel.org, chao.p.peng@intel.com, chenhuacai@kernel.org, corbet@lwn.net, dave.hansen@intel.com, dave.hansen@linux.intel.com, david@redhat.com, dmatlack@google.com, erdemaktas@google.com, fan.du@intel.com, fvdl@google.com, haibo1.xu@intel.com, hannes@cmpxchg.org, hch@infradead.org, hpa@zytor.com, hughd@google.com, ira.weiny@intel.com, isaku.yamahata@intel.com, jack@suse.cz, james.morse@arm.com, jarkko@kernel.org, jgg@ziepe.ca, jgowans@amazon.com, jhubbard@nvidia.com, jroedel@suse.de, jthoughton@google.com, jun.miao@intel.com, kai.huang@intel.com, keirf@google.com, kent.overstreet@linux.dev, liam.merwick@oracle.com, maciej.wieczor-retman@intel.com, mail@maciej.szmigiero.name, maobibo@loongson.cn, mathieu.desnoyers@efficios.com, maz@kernel.org, mhiramat@kernel.org, mhocko@kernel.org, mic@digikod.net, michael.roth@amd.com, mingo@redhat.com, mlevitsk@redhat.com, mpe@ellerman.id.au, muchun.song@linux.dev, nikunj@amd.com, nsaenz@amazon.es, oliver.upton@linux.dev, palmer@dabbelt.com, pankaj.gupta@amd.com, paul.walmsley@sifive.com, pbonzini@redhat.com, peterx@redhat.com, pgonda@google.com, prsampat@amd.com, pvorel@suse.cz, qperret@google.com, richard.weiyang@gmail.com, rick.p.edgecombe@intel.com, rientjes@google.com, rostedt@goodmis.org, roypat@amazon.co.uk, rppt@kernel.org, seanjc@google.com, shakeel.butt@linux.dev, shuah@kernel.org, steven.price@arm.com, steven.sistare@oracle.com, suzuki.poulose@arm.com, tabba@google.com, tglx@linutronix.de, thomas.lendacky@amd.com, vannapurve@google.com, vbabka@suse.cz, viro@zeniv.linux.org.uk, vkuznets@redhat.com, wei.w.wang@intel.com, will@kernel.org, willy@infradead.org, wyihan@google.com, xiaoyao.li@intel.com, yan.y.zhao@intel.com, yilun.xu@intel.com, yuzenghui@huawei.com, zhiquan1.li@intel.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam01 X-Stat-Signature: hwruxnjttecf7c1duccbz67sfdgpija1 X-Rspam-User: X-Rspamd-Queue-Id: 1F8C1140014 X-HE-Tag: 1760731969-173461 X-HE-Meta: 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 MAm52HkM 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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: From: Sean Christopherson Bury KVM_VM_MEMORY_ATTRIBUTES in x86 to discourage other architectures from adding support for per-VM memory attributes, because tracking private vs. shared memory on a per-VM basis is now deprecated in favor of tracking on a per-guest_memfd basis, and no other memory attributes are on the horizon. This will also allow modifying KVM_VM_MEMORY_ATTRIBUTES to be user-selectable (in x86) without creating weirdness in KVM's Kconfigs. Now that guest_memfd support memory attributes, it's entirely possible to run x86 CoCo VMs without support for KVM_VM_MEMORY_ATTRIBUTES. Leave the code itself in common KVM so that it's trivial to undo this change if new per-VM attributes do come along. Signed-off-by: Sean Christopherson --- arch/x86/kvm/Kconfig | 4 ++++ virt/kvm/Kconfig | 4 ---- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index acb03b45ba050..49c7709e3d895 100644 --- a/arch/x86/kvm/Kconfig +++ b/arch/x86/kvm/Kconfig @@ -80,6 +80,10 @@ config KVM_WERROR If in doubt, say "N". +config KVM_VM_MEMORY_ATTRIBUTES + select KVM_MEMORY_ATTRIBUTES + bool + config KVM_SW_PROTECTED_VM bool "Enable support for KVM software-protected VMs" depends on EXPERT diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig index b3473aec4d24d..72b19813e5412 100644 --- a/virt/kvm/Kconfig +++ b/virt/kvm/Kconfig @@ -112,10 +112,6 @@ config KVM_MEMORY_ATTRIBUTES depends on KVM_GENERIC_MMU_NOTIFIER bool -config KVM_VM_MEMORY_ATTRIBUTES - select KVM_MEMORY_ATTRIBUTES - bool - config KVM_GUEST_MEMFD select KVM_MEMORY_ATTRIBUTES select XARRAY_MULTI -- 2.51.0.858.gf9c4a03a3a-goog