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[2003:d8:2f00:4000:a438:1541:1da1:723a]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3b61ca2bb96sm16449200f8f.30.2025.07.23.06.17.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 23 Jul 2025 06:17:17 -0700 (PDT) Message-ID: <8ef1ddd4-6597-4897-8e85-e839c1759889@redhat.com> Date: Wed, 23 Jul 2025 15:17:14 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v16 09/22] KVM: x86: Enable KVM_GUEST_MEMFD for all 64-bit builds To: Fuad Tabba , kvm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-mm@kvack.org, kvmarm@lists.linux.dev 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, 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: <20250723104714.1674617-1-tabba@google.com> <20250723104714.1674617-10-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-Rspamd-Queue-Id: F1C78C0006 X-Rspam-User: X-Rspamd-Server: rspam09 X-Stat-Signature: cq6yhb8974hokxend86afwka6rre7rh8 X-HE-Tag: 1753276644-220547 X-HE-Meta: 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 VxZmQo26 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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 23.07.25 12:47, Fuad Tabba wrote: > Enable KVM_GUEST_MEMFD for all KVM x86 64-bit builds, i.e. for "default" > VM types when running on 64-bit KVM. This will allow using guest_memfd > to back non-private memory for all VM shapes, by supporting mmap() on > guest_memfd. It's a bit weird, because mmap() support gets added in a later patch. But I suspect this is fine. Reviewed-by: David Hildenbrand -- Cheers, David / dhildenb