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Mon, 14 Apr 2025 03:16:16 -0700 (PDT) MIME-Version: 1.0 References: <20250318161823.4005529-1-tabba@google.com> <20250318161823.4005529-4-tabba@google.com> In-Reply-To: From: Fuad Tabba Date: Mon, 14 Apr 2025 11:15:40 +0100 X-Gm-Features: ATxdqUFTBJlpnwSmrV77Tym0H8Hp9RCIeXMAAODOU2G7ZtkMx-Y5jKinNbiiJow Message-ID: Subject: Re: [PATCH v7 3/9] KVM: guest_memfd: Allow host to map guest_memfd() pages To: David Hildenbrand Cc: kvm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-mm@kvack.org, 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 Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: c4gz9xdquzw63ryjaysrix6foktqajxw X-Rspam-User: X-Rspamd-Queue-Id: D7B7440004 X-Rspamd-Server: rspam08 X-HE-Tag: 1744625777-211199 X-HE-Meta: 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 eEkCjPgE qli8vZse6cUppQDejekRRmsiFB6pqaVm/hQDa4Gu3EEpiU8bvJXhX47MHHwtuTbCbYLdsqgjXUR/AH5uSv5V9gmRW7LiIjPw+6tEhmqKy1DyvhI8lHQreFa7C6HtYk1Ei+Vf/uKDl14CXuKsmLmNWK74oDaS87L+0GcguNv4F+Oc7DniaPEkjOn2DLcjB7xOp7Dc1GuDcIwy42Dcd+OGrMUTemOMAv30uFE4PSf4a/Q0ot0iGBkOVoO+TCORNnqCcNMZYz6t1WGv5RrwcNLh1hVYLaIJ5IUWbB98a6tEdjh+wsBGQ+KWBB0LRZBGvC9/64HzaKeMaNfLG6IQmMtelXZXtfA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.003567, 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 Mon, 14 Apr 2025 at 11:06, David Hildenbrand wrote: > > > > + /* > > + * Shared folios would not be marked as "guestmem" so far, and we only > > + * expect shared folios at this point. > > + */ > > + if (WARN_ON_ONCE(folio_test_guestmem(folio))) { > > + ret = VM_FAULT_SIGBUS; > > + goto out_folio; > > + } > > With that dropped for now > > Acked-by: David Hildenbrand Thanks! /fuad > -- > Cheers, > > David / dhildenb >