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[175.34.62.5]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7482af7ad57sm4659019b3a.65.2025.06.08.17.29.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 08 Jun 2025 17:29:50 -0700 (PDT) Message-ID: Date: Mon, 9 Jun 2025 10:29:29 +1000 Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v11 15/18] KVM: arm64: Enable host mapping of shared guest_memfd memory 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, 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: <20250605153800.557144-1-tabba@google.com> <20250605153800.557144-16-tabba@google.com> From: Gavin Shan In-Reply-To: <20250605153800.557144-16-tabba@google.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 1Pqeo6ywR18FaOVA0klM4j5nQQkSnvbO3Ty7_fK7lKw_1749428991 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 6/6/25 1:37 AM, Fuad Tabba wrote: > Enable the host mapping of guest_memfd-backed memory on arm64. > > This applies to all current arm64 VM types that support guest_memfd. > Future VM types can restrict this behavior via the > kvm_arch_gmem_supports_shared_mem() hook if needed. > > Acked-by: David Hildenbrand > Signed-off-by: Fuad Tabba > --- > arch/arm64/include/asm/kvm_host.h | 5 +++++ > arch/arm64/kvm/Kconfig | 1 + > arch/arm64/kvm/mmu.c | 7 +++++++ > 3 files changed, 13 insertions(+) > Reviewed-by: Gavin Shan