From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7D36FC4332F for ; Mon, 30 Oct 2023 17:12:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=v0iQQ6fyR7oS9382Eb92nlbosJJg5PXhjEj22xdFP8A=; b=whn7MTNjl1+X60 ah5cyjs4ZvUxc2JN0FQla4w0/eVDrHeK31vGHBjT3EF9WPmIp49jGj+KSWmS7lsnFpNADbUfAHcxr CVYOFFHp1AXZ/mMzBdQ6W58zjvH0Em2M59e5Wfz17PA0sksuyrn2kvKzGUA7KWXh7dUcKW3nbr0bt ttorffRBnHwImo70cplH7ZJsZY7CnuHysa9rZs12QazQyL5mjNZx7EFM1L4U/kdvZ1syO6QILzbwS 5+wPVuHl3PfnKoqfD7T3kC1aDf8eDjNCjL/yt82bmV/1N4r/nPLxNwWP+JDBpFfYr2fQ1rY6iTdjx oEdbOH8O4BguLwamMRcw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qxVo0-003izl-2a; Mon, 30 Oct 2023 17:12:00 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qxVnx-003ixy-0r for linux-arm-kernel@lists.infradead.org; Mon, 30 Oct 2023 17:11:59 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1698685916; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=lo4ysHz5pmHfFsXnk84EoayTJ3hTlIhc3rVOfp1rxtc=; b=G/Pb+rjAFxWHzYcVBI8zi6UlaQp7vFkxR2yNN10/0x7DhS/Nv0n6tuQj1ReIiSNQVEwItT viIEp21blHwXVd240rpfg31xzEgLnYDbglt/o86lNQf/bqzwQ43b+RvJRl3QiCGKe2ybjU RAGCaB4P3rz+a6nUhfdd8blogIuJfkc= Received: from mail-wm1-f71.google.com (mail-wm1-f71.google.com [209.85.128.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-590-AMEWgVSyM3iCYRxUdqlgIg-1; Mon, 30 Oct 2023 13:11:54 -0400 X-MC-Unique: AMEWgVSyM3iCYRxUdqlgIg-1 Received: by mail-wm1-f71.google.com with SMTP id 5b1f17b1804b1-4084e263ec4so34468915e9.2 for ; Mon, 30 Oct 2023 10:11:53 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698685913; x=1699290713; h=content-transfer-encoding:in-reply-to:autocrypt:from:references:cc :to:content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=lo4ysHz5pmHfFsXnk84EoayTJ3hTlIhc3rVOfp1rxtc=; b=nhqQrl6pwX/2ZJ/MO+fVGdBVDny2+DjJ5YtRbY+ys5vpNM9C4Y7uzCjMmU3Ym6BcJp mW2HMryRL8BfZ8b0NzeYW5qlQDlioaqtGbH7UIX8+d1SlXqjlIBD/Xd0XxrOJ75RN14G T7X69+ElLOW5/gOp6UnWn9CL8Ns1Q6u697pVUjeEQSIxMkgHL6S90YXIbR5lIfXzjtrQ pVAiD9rpnLfwN31403DTJcIycGqThXXPoxxTrIZQV4FGZc20GGXpG7YDw6Ey2bOF0ylO pfkYB9QiGd9UXI0ooL9zM+Y4+lJjyfAyo2GAhSDQDaWSost7wcfffVWhZmibOiPsFXiq gn/w== X-Gm-Message-State: AOJu0YyZIsCVUUhJo7m5xmdQ4ZwH/c/PpEdYnMVAmgTU0zVzt7uUE5+w n2PrUpHceq4mID0CWCubujN6j2wHTQ9KsKUGSgl/AM3QiBkPLzsNg74bBQvOjIilzv2RejQJsqV tAynckkOzheu8lLf0QKccj20EWyC0orwxMS8= X-Received: by 2002:a05:600c:1c9a:b0:401:d803:6243 with SMTP id k26-20020a05600c1c9a00b00401d8036243mr8797119wms.32.1698685912906; Mon, 30 Oct 2023 10:11:52 -0700 (PDT) X-Google-Smtp-Source: AGHT+IEE3mzsAlLnekLWdY8A4rueILcmfn/0LGvZfOgJVm2OXLCsoyw1l1K7DLfNbIxoxk9UoBDhkg== X-Received: by 2002:a05:600c:1c9a:b0:401:d803:6243 with SMTP id k26-20020a05600c1c9a00b00401d8036243mr8797063wms.32.1698685912474; Mon, 30 Oct 2023 10:11:52 -0700 (PDT) Received: from [192.168.1.174] ([151.81.68.207]) by smtp.googlemail.com with ESMTPSA id w16-20020adfcd10000000b0032da75af3easm8617198wrm.80.2023.10.30.10.11.40 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 30 Oct 2023 10:11:51 -0700 (PDT) Message-ID: <773328b3-0ef0-4e93-afb9-6fba3302b8a7@redhat.com> Date: Mon, 30 Oct 2023 18:11:39 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v13 10/35] KVM: Add a dedicated mmu_notifier flag for reclaiming freed memory To: Sean Christopherson , Marc Zyngier , Oliver Upton , Huacai Chen , Michael Ellerman , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexander Viro , Christian Brauner , "Matthew Wilcox (Oracle)" , Andrew Morton Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Xiaoyao Li , Xu Yilun , Chao Peng , Fuad Tabba , Jarkko Sakkinen , Anish Moorthy , David Matlack , Yu Zhang , Isaku Yamahata , =?UTF-8?B?TWlja2HDq2wgU2FsYcO8?= =?UTF-8?Q?n?= , Vlastimil Babka , Vishal Annapurve , Ackerley Tng , Maciej Szmigiero , David Hildenbrand , Quentin Perret , Michael Roth , Wang , Liam Merwick , Isaku Yamahata , "Kirill A . Shutemov" References: <20231027182217.3615211-1-seanjc@google.com> <20231027182217.3615211-11-seanjc@google.com> From: Paolo Bonzini Autocrypt: addr=pbonzini@redhat.com; keydata= xsEhBFRCcBIBDqDGsz4K0zZun3jh+U6Z9wNGLKQ0kSFyjN38gMqU1SfP+TUNQepFHb/Gc0E2 CxXPkIBTvYY+ZPkoTh5xF9oS1jqI8iRLzouzF8yXs3QjQIZ2SfuCxSVwlV65jotcjD2FTN04 hVopm9llFijNZpVIOGUTqzM4U55sdsCcZUluWM6x4HSOdw5F5Utxfp1wOjD/v92Lrax0hjiX DResHSt48q+8FrZzY+AUbkUS+Jm34qjswdrgsC5uxeVcLkBgWLmov2kMaMROT0YmFY6A3m1S P/kXmHDXxhe23gKb3dgwxUTpENDBGcfEzrzilWueOeUWiOcWuFOed/C3SyijBx3Av/lbCsHU Vx6pMycNTdzU1BuAroB+Y3mNEuW56Yd44jlInzG2UOwt9XjjdKkJZ1g0P9dwptwLEgTEd3Fo UdhAQyRXGYO8oROiuh+RZ1lXp6AQ4ZjoyH8WLfTLf5g1EKCTc4C1sy1vQSdzIRu3rBIjAvnC tGZADei1IExLqB3uzXKzZ1BZ+Z8hnt2og9hb7H0y8diYfEk2w3R7wEr+Ehk5NQsT2MPI2QBd wEv1/Aj1DgUHZAHzG1QN9S8wNWQ6K9DqHZTBnI1hUlkp22zCSHK/6FwUCuYp1zcAEQEAAc0j UGFvbG8gQm9uemluaSA8cGJvbnppbmlAcmVkaGF0LmNvbT7CwU0EEwECACMFAlRCcBICGwMH CwkIBwMCAQYVCAIJCgsEFgIDAQIeAQIXgAAKCRB+FRAMzTZpsbceDp9IIN6BIA0Ol7MoB15E 11kRz/ewzryFY54tQlMnd4xxfH8MTQ/mm9I482YoSwPMdcWFAKnUX6Yo30tbLiNB8hzaHeRj jx12K+ptqYbg+cevgOtbLAlL9kNgLLcsGqC2829jBCUTVeMSZDrzS97ole/YEez2qFpPnTV0 VrRWClWVfYh+JfzpXmgyhbkuwUxNFk421s4Ajp3d8nPPFUGgBG5HOxzkAm7xb1cjAuJ+oi/K CHfkuN+fLZl/u3E/fw7vvOESApLU5o0icVXeakfSz0LsygEnekDbxPnE5af/9FEkXJD5EoYG SEahaEtgNrR4qsyxyAGYgZlS70vkSSYJ+iT2rrwEiDlo31MzRo6Ba2FfHBSJ7lcYdPT7bbk9 AO3hlNMhNdUhoQv7M5HsnqZ6unvSHOKmReNaS9egAGdRN0/GPDWr9wroyJ65ZNQsHl9nXBqE AukZNr5oJO5vxrYiAuuTSd6UI/xFkjtkzltG3mw5ao2bBpk/V/YuePrJsnPFHG7NhizrxttB nTuOSCMo45pfHQ+XYd5K1+Cv/NzZFNWscm5htJ0HznY+oOsZvHTyGz3v91pn51dkRYN0otqr bQ4tlFFuVjArBZcapSIe6NV8C4cEiSTOwE0EVEJx7gEIAMeHcVzuv2bp9HlWDp6+RkZe+vtl KwAHplb/WH59j2wyG8V6i33+6MlSSJMOFnYUCCL77bucx9uImI5nX24PIlqT+zasVEEVGSRF m8dgkcJDB7Tps0IkNrUi4yof3B3shR+vMY3i3Ip0e41zKx0CvlAhMOo6otaHmcxr35sWq1Jk tLkbn3wG+fPQCVudJJECvVQ//UAthSSEklA50QtD2sBkmQ14ZryEyTHQ+E42K3j2IUmOLriF dNr9NvE1QGmGyIcbw2NIVEBOK/GWxkS5+dmxM2iD4Jdaf2nSn3jlHjEXoPwpMs0KZsgdU0pP JQzMUMwmB1wM8JxovFlPYrhNT9MAEQEAAcLBMwQYAQIACQUCVEJx7gIbDAAKCRB+FRAMzTZp sadRDqCctLmYICZu4GSnie4lKXl+HqlLanpVMOoFNnWs9oRP47MbE2wv8OaYh5pNR9VVgyhD OG0AU7oidG36OeUlrFDTfnPYYSF/mPCxHttosyt8O5kabxnIPv2URuAxDByz+iVbL+RjKaGM GDph56ZTswlx75nZVtIukqzLAQ5fa8OALSGum0cFi4ptZUOhDNz1onz61klD6z3MODi0sBZN Aj6guB2L/+2ZwElZEeRBERRd/uommlYuToAXfNRdUwrwl9gRMiA0WSyTb190zneRRDfpSK5d usXnM/O+kr3Dm+Ui+UioPf6wgbn3T0o6I5BhVhs4h4hWmIW7iNhPjX1iybXfmb1gAFfjtHfL xRUr64svXpyfJMScIQtBAm0ihWPltXkyITA92ngCmPdHa6M1hMh4RDX+Jf1fiWubzp1voAg0 JBrdmNZSQDz0iKmSrx8xkoXYfA3bgtFN8WJH2xgFL28XnqY4M6dLhJwV3z08tPSRqYFm4NMP dRsn0/7oymhneL8RthIvjDDQ5ktUjMe8LtHr70OZE/TT88qvEdhiIVUogHdo4qBrk41+gGQh b906Dudw5YhTJFU3nC6bbF2nrLlB4C/XSiH76ZvqzV0Z/cAMBo5NF/w= In-Reply-To: <20231027182217.3615211-11-seanjc@google.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231030_101157_371653_806E15A1 X-CRM114-Status: GOOD ( 11.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 10/27/23 20:21, Sean Christopherson wrote: > Handle AMD SEV's kvm_arch_guest_memory_reclaimed() hook by having > __kvm_handle_hva_range() return whether or not an overlapping memslot > was found, i.e. mmu_lock was acquired. Using the .on_unlock() hook > works, but kvm_arch_guest_memory_reclaimed() needs to run after dropping > mmu_lock, which makes .on_lock() and .on_unlock() asymmetrical. > > Use a small struct to return the tuple of the notifier-specific return, > plus whether or not overlap was found. Because the iteration helpers are > __always_inlined, practically speaking, the struct will never actually be > returned from a function call (not to mention the size of the struct will > be two bytes in practice). Could have been split in two patches, but it's fine anyway. Reviewed-by: Paolo Bonzini Paolo _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel