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AJvYcCXdTowZ07vKmwCMgMIf6n8A3AXdbnBfRrsGuwfyDAVzh35QdI5tK3tPfdTOPG6xN3x7OaMOi6E=@lists.linux.dev X-Gm-Message-State: AOJu0Yzxj4IEu9MyZ2NUyrS+dISGmboPTHYblrC0+/eNYzu+mvrNydyG 9XgMrspGdtPFaAulTr+Ii6eUZQfuf+TWzzCNL02LOXRE5MLuzq+LEqJjhYTpWZOLIer4SwyZ+qO j0DVuag== X-Google-Smtp-Source: AGHT+IHSdqHbxeeeIonkSh5BY2m83Kk+wImCtE785oBEw0uVpGh4sf1S5Bqzy2yOyFZqFe/ReQAn+EAhx5g= X-Received: from pjvf3.prod.google.com ([2002:a17:90a:da83:b0:312:ea08:fa64]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:ca8d:b0:23f:b954:eee with SMTP id d9443c01a7336-23fb9541174mr15170785ad.35.1753455397682; Fri, 25 Jul 2025 07:56:37 -0700 (PDT) Date: Fri, 25 Jul 2025 07:56:36 -0700 In-Reply-To: Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250723104714.1674617-1-tabba@google.com> Message-ID: Subject: Re: [PATCH v16 00/22] KVM: Enable host userspace mapping for guest_memfd-backed memory for non-CoCo VMs From: Sean Christopherson To: Ackerley Tng Cc: Fuad Tabba , 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, 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 Content-Type: text/plain; charset="us-ascii" On Thu, Jul 24, 2025, Ackerley Tng wrote: > Fuad Tabba writes: > > [snip] > > Did the patch [1] for x86/mmu that actually allows faulting when > kvm_memslot_is_gmem_only() get dropped by accident? Ah shoot, it did get dropped. I have a feeling Fuad read "drop the helper" as "drop the patch" :-) Faud, given the growing list of x86-specific goofs, any objection to me sending v17? I'd also like to tack on a selftest patch to verify that KVM can actually fault-in non-private memory via a guest_memfd fd.