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AHgh+RrJriz07GYEsFU/jANDOYTEh29OfEIDHwy5XLNJhQHyZ2LR4AQIENAcdiTWZLA+8acEVGvPYZlj8oREvRM=@vger.kernel.org X-Gm-Message-State: AOJu0YyfaJOdMowS2ashhfSkcMvif6Zv65WIdVah8bKKkbmgWtVOEFPa zpaei01uq1NRW6MZZWxI1UI7QLFNWjAd08DDCfjAM7WEQsWyNnqeXQcD2W5zcunYTnHtymyO/VD k1tTUrQ== X-Received: from plhv7.prod.google.com ([2002:a17:903:2387:b0:2ce:9c01:be21]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:18b:b0:2ca:ed57:8586 with SMTP id d9443c01a7336-2cfde83034fmr83044295ad.23.1785163265520; Mon, 27 Jul 2026 07:41:05 -0700 (PDT) Date: Mon, 27 Jul 2026 07:41:04 -0700 In-Reply-To: <627eda4b-c084-4cd8-ad3a-3b3793feae0d@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260723210811.72720-1-seanjc@google.com> <20260723210811.72720-8-seanjc@google.com> <627eda4b-c084-4cd8-ad3a-3b3793feae0d@intel.com> Message-ID: Subject: Re: [PATCH v6 7/9] KVM: guest_memfd: Rename prepare() hook and Kconfig to make_private() / CONVERT From: Sean Christopherson To: Xiaoyao Li Cc: Paolo Bonzini , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Fuad Tabba , Ackerley Tng , Michael Roth , Fuad Tabba Content-Type: text/plain; charset="us-ascii" On Mon, Jul 27, 2026, Xiaoyao Li wrote: > On 7/24/2026 5:08 AM, Sean Christopherson wrote: > > Rework guest_memfd's prepare() hook into a more accurate make_private(), > > and rework its Kconfig from PREPARE to a more generic CONVERT. > > > This will > > allow x86 to share (pun intended) a kvm_x86_ops.gmem_make_shared() hook > > between the "convert to shared" and "reclaim" flows, which are one and the > > same for SNP. > > Does it mean in the future we will introduce something like below? > > #ifdef CONFIG_HAVE_KVM_ARCH_GMEM_CONVERT > int kvm_arch_gmem_make_private(struct kvm *kvm, gfn_t gfn, kvm_pfn_t pfn, > int max_order) > { > return kvm_x86_call(gmem_make_private)(kvm, pfn, gfn, max_order); > } > > +int kvm_arch_gmem_make_shared(kvm_pfn_t pfn, kvm_pfn_t nr_pages) > +{ > + return kvm_x86_call(gmem_make_private)(pfn, nr_pages); s/gmem_make_private/gmem_make_shared, but yeah, that's the plan for the in-place conversion series.