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 X-Spam-Level: X-Spam-Status: No, score=-8.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3CC6BC07E95 for ; Wed, 7 Jul 2021 13:58:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2936761C73 for ; Wed, 7 Jul 2021 13:58:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231906AbhGGOBa (ORCPT ); Wed, 7 Jul 2021 10:01:30 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:45111 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231472AbhGGOB0 (ORCPT ); Wed, 7 Jul 2021 10:01:26 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1625666326; 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; bh=Z7dzRxBxm91wjIPJ9WL8p7wOAJtFPjrAp62go4fmxBM=; b=Oab+mbvA78Hvsi7kR2Tw3n1LvenRG+Q+HtuN6b0jc4GspghbELXF6zVieIpxhg2Jr75rBw 2773RIiqvWJRw0ythgjjq9mSwWc+Vs1zTGQ9eGBtNd1YysOhD+kvlI6P8VgLa0uIg5i6NT 1B80mJzuH0PY2QTdAtCssNpylLTL4ow= Received: from mail-ej1-f72.google.com (mail-ej1-f72.google.com [209.85.218.72]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-464-piWMsdnTNqKD0SXUHnOh3g-1; Wed, 07 Jul 2021 09:58:45 -0400 X-MC-Unique: piWMsdnTNqKD0SXUHnOh3g-1 Received: by mail-ej1-f72.google.com with SMTP id q14-20020a1709066aceb029049fa6bee56fso581486ejs.21 for ; Wed, 07 Jul 2021 06:58:44 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=Z7dzRxBxm91wjIPJ9WL8p7wOAJtFPjrAp62go4fmxBM=; b=sEK1RgzjuP/AJQbalHHBUlA2q07FaijXOh8+CyT9ZuSafTrAYJrnfZasK8FU6AxRNc CMI7WS8MfxMBsyI0xRH3P1SakonvNakbSmcj0uid9AYR4Lc8jmhxx3LY9Ef65bpiNGmw 9k0rdY8rnyDug/PthGI1cxT87y6E+s0+xg4UxrT7wrWpnmHH1mTBb9QclIbIzRLo1Mar Pl0geA2F2dIrhfq94IcAladmxXQ+4X/fR4uN5KhpNYd4/kD/EiSrTWsDNbK1gH215Qcn csZn2DtS58A/lMIYH5sZDFbn4LUaE+yqbndCU6HpaIJJWhri17ztZTU5s2ieXwtmnPoz 1+BQ== X-Gm-Message-State: AOAM532vdsAOFzHtGw6ikquX+6Id7T2/uPqZ7fiJ34D3tEr4zNFJQ5A3 7XfSKU+SurnndOqeB4GFJ2o4vMAIevBPzCNMxDPVvXiwwtLl2rrDXlISDDrHp10T2QYZK4nkaJW qqepBp63ey893iAGgxhoqGdZA X-Received: by 2002:a17:907:778a:: with SMTP id ky10mr24219089ejc.32.1625666323677; Wed, 07 Jul 2021 06:58:43 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyv4/GKMuuk/PByT1b/oedsUb6euFSbdyt/iajMDhfbbJx/hDlbvK2r52qKQEnfJptk9m8CAg== X-Received: by 2002:a17:907:778a:: with SMTP id ky10mr24219079ejc.32.1625666323534; Wed, 07 Jul 2021 06:58:43 -0700 (PDT) Received: from ?IPv6:2001:b07:6468:f312:c8dd:75d4:99ab:290a? ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id z10sm8700548edd.11.2021.07.07.06.58.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 07 Jul 2021 06:58:42 -0700 (PDT) Subject: Re: [PATCH 02/10] KVM: x86: APICv: fix race in kvm_request_apicv_update on SVM To: Maxim Levitsky , kvm@vger.kernel.org Cc: Thomas Gleixner , Sean Christopherson , Wanpeng Li , Vitaly Kuznetsov , Joerg Roedel , Borislav Petkov , "H. Peter Anvin" , Ingo Molnar , "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , Jim Mattson References: <20210623113002.111448-1-mlevitsk@redhat.com> <20210623113002.111448-3-mlevitsk@redhat.com> <6c4a69ce-595e-d5a1-7b4e-e6ce1afe1252@redhat.com> <43ef1a1ea488977db11d40ec9672b524ec816112.camel@redhat.com> <9413056ebbd5997a35b446f2841589973484ba02.camel@redhat.com> From: Paolo Bonzini Message-ID: <502391b4-5a5f-6f37-dab6-06ae276a205f@redhat.com> Date: Wed, 7 Jul 2021 15:58:41 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <9413056ebbd5997a35b446f2841589973484ba02.camel@redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/07/21 14:57, Maxim Levitsky wrote: > > Hi! > Any update? should I use a lock for this? Yes please, even irq_lock can do. Paolo