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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id B2B6CC4332F for ; Thu, 2 Nov 2023 11:14:24 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 1CC216B0298; Thu, 2 Nov 2023 07:14:24 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 17CE76B029B; Thu, 2 Nov 2023 07:14:24 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F10ED6B02A2; Thu, 2 Nov 2023 07:14:23 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id E2ABC6B0298 for ; Thu, 2 Nov 2023 07:14:23 -0400 (EDT) Received: from smtpin23.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id B532980DBE for ; Thu, 2 Nov 2023 11:14:23 +0000 (UTC) X-FDA: 81412755606.23.C2A3A55 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by imf08.hostedemail.com (Postfix) with ESMTP id 843EB160002 for ; Thu, 2 Nov 2023 11:14:21 +0000 (UTC) Authentication-Results: imf08.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=VMjjnme9; spf=pass (imf08.hostedemail.com: domain of pbonzini@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=pbonzini@redhat.com; dmarc=pass (policy=none) header.from=redhat.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1698923661; a=rsa-sha256; cv=none; b=kHTDpyJ1ceSEL9MyA8WiqgiJdU3bVrHAcybwNvCK3ho4Av/kbSSYV/ry/+0dWXgbZoMBf9 0q+HoH4ldwIgFtsWsrvNNaLIuTv5hXJYNdB+o8wA/EyIG5Dho8CHHocHw7kUoufq8EDKwq GfETGTUB8WQT3m/T+EM10P3m/KchgAw= ARC-Authentication-Results: i=1; imf08.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=VMjjnme9; spf=pass (imf08.hostedemail.com: domain of pbonzini@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=pbonzini@redhat.com; dmarc=pass (policy=none) header.from=redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1698923661; h=from:from:sender: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:dkim-signature; bh=nE+jpziewfIiESFBa36vSQ59b0yur6c77ORQ4q4A4TQ=; b=q2lbO1dER3mYD/7XtPmyVNLQiI8H8RKoWukLqAVeCwgqq6NvoDzQUiqtlncVYo+uJbJhcT h9+j1w8furVfS6XasJg9WnLnyy59vP6/YhjTQfiKJSm1uSBx+Njbk2w1RtK2OrR0Gfnc/C 0vTb1xnjq5Ec+N/uD8j9fiTiOgGEdb4= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1698923660; 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=nE+jpziewfIiESFBa36vSQ59b0yur6c77ORQ4q4A4TQ=; b=VMjjnme95siBMGJmpyz6WxwVYbrc9lgpnUMkAtw9NP6iASHrjDoMMm5SzTitgQz4Bcf3DY wCbp6o9iCcdq94+f8rsVxEDUTZB5AaN0z9zb/nB4IU6hpVET+9EM8MydeXiQICKm97d5pK IIee8Twyb6jAWJG3fTGcHQrOOcIu9sg= Received: from mail-ed1-f71.google.com (mail-ed1-f71.google.com [209.85.208.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-221-SkAtGmaaPr-INkxKtkI8SA-1; Thu, 02 Nov 2023 07:14:19 -0400 X-MC-Unique: SkAtGmaaPr-INkxKtkI8SA-1 Received: by mail-ed1-f71.google.com with SMTP id 4fb4d7f45d1cf-53e02a0ebfdso605810a12.3 for ; Thu, 02 Nov 2023 04:14:19 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698923658; x=1699528458; 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=nE+jpziewfIiESFBa36vSQ59b0yur6c77ORQ4q4A4TQ=; b=YAnHRiAGqQQbVADXWXOajHo4cvglkfESbQwDDx7fnR7QwgE4XcbLRCfH0Vp+mCm+eH /xV42orjgAmcK8tsoDF/jTRgyw9BLRfYb2hB2USl8EAtrunI5xN2LDh4FdTTC2tEgWCP h3xtHdVWBZ7YDJM8Xxq12BgXUwL0KFY16qy5Q2ddATTNpvBARNev+fE2giv9GIa1Tkdq SNvy3+bIknxO2qozZJR4kiK+XQ0JsJKnY6K6FVOFx9gT8uLGIaRnX9lfMNhOtsAXKyRR k5hik33OYnDZH6TY/CHnd/mIjFs4YdQ2cY/MVRBuh751TLND4QvdF1VNWHplsa10B/vK yMZw== X-Gm-Message-State: AOJu0YzaUhucikGFeJf/4m9YuYXeYX/UnzJVrUirVn+a8L+QmlkYpRzG yV1x+vKsOSD2S6CaOHE2z66PcngQX9JHKDRyZtVguvT/Qd6Esv5xedH+/eAVwLf9wECIAJq0x3a YPiotzCZCO1Q= X-Received: by 2002:a05:6402:d6b:b0:541:29c8:959b with SMTP id ec43-20020a0564020d6b00b0054129c8959bmr12074266edb.39.1698923658429; Thu, 02 Nov 2023 04:14:18 -0700 (PDT) X-Google-Smtp-Source: AGHT+IEXhppfRa15KEqVY2rnJoTwoiSC4PZM5XqKpBQUyQg58A1nLwAa47Vx7RLL9LFOmphAlpAU2Q== X-Received: by 2002:a05:6402:d6b:b0:541:29c8:959b with SMTP id ec43-20020a0564020d6b00b0054129c8959bmr12074247edb.39.1698923658101; Thu, 02 Nov 2023 04:14:18 -0700 (PDT) Received: from ?IPV6:2001:b07:6468:f312:9af8:e5f5:7516:fa89? ([2001:b07:6468:f312:9af8:e5f5:7516:fa89]) by smtp.googlemail.com with ESMTPSA id r25-20020a50c019000000b00537666d307csm2257960edb.32.2023.11.02.04.14.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 02 Nov 2023 04:14:17 -0700 (PDT) Message-ID: Date: Thu, 2 Nov 2023 12:14:13 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v13 12/35] KVM: Prepare for handling only shared mappings in mmu_notifier events To: Binbin Wu , Sean Christopherson Cc: 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 , 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> <20231027182217.3615211-13-seanjc@google.com> <9963b77c-3a38-4f89-b21e-48d0fdda8f53@linux.intel.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: <9963b77c-3a38-4f89-b21e-48d0fdda8f53@linux.intel.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 843EB160002 X-Stat-Signature: rsqdhgwdzskqa4m5w656smq3gqwpqhyz X-Rspam-User: X-HE-Tag: 1698923661-520507 X-HE-Meta: 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 Dhvu6GrN 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, 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 11/2/23 06:59, Binbin Wu wrote: > >> Add flags to "struct kvm_gfn_range" to let notifier events target >> only shared and only private mappings, and write up the existing >> mmu_notifier events to be shared-only (private memory is never >> associated with a userspace virtual address, i.e. can't be reached >> via mmu_notifiers). >> >> Add two flags so that KVM can handle the three possibilities >> (shared, private, and shared+private) without needing something >> like a tri-state enum. > > I see the two flags are set/cleared in __kvm_handle_hva_range() in > this patch and kvm_handle_gfn_range() from the later patch 13/35, but > I didn't see they are used/read in this patch series if I didn't miss > anything. How are they supposed to be used in KVM? They are going to be used by SNP/TDX patches. Paolo