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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B68ECC04A68 for ; Thu, 28 Jul 2022 22:35:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232560AbiG1WfP (ORCPT ); Thu, 28 Jul 2022 18:35:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43522 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230312AbiG1WfO (ORCPT ); Thu, 28 Jul 2022 18:35:14 -0400 Received: from mail-pl1-x631.google.com (mail-pl1-x631.google.com [IPv6:2607:f8b0:4864:20::631]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 35A37626A for ; Thu, 28 Jul 2022 15:35:13 -0700 (PDT) Received: by mail-pl1-x631.google.com with SMTP id v18so2993322plo.8 for ; Thu, 28 Jul 2022 15:35:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc; bh=QH1SswHogd2HYdm+DJGhURoSojlk/dCm4tDDpy+Plzc=; b=DWgbT7/SYnRGYxKp/73nM2bQFceSlVA3zb3AvExKGWdz6XwR3KqCuJ6tMopoNSTwhZ eRIWaAsjGsBzKoJLpgSXn/X1Rb5rYTvp96m87FPAX8pjQAaL0bAJ1a2qS2/XEY9sAUAG wlSocwL9FFsjh5l3rUCCSMbBEYKVHLaf7bLu91sxJBWbWynNrrpotygzZHJtHcGGTG5x REfu8SuEJ6iTKYLpB7DhRVq8pvy4lLMWQ8xsS196GMWGPWpwxR03Y8QbGeIuGrHFcSxE m8rLptXZeTOF/Y/UgNB1TgAHFr7LVURTKoVoEVeyvaCbVO37TsavGwXUMnetdD9CtNtp wD1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc; bh=QH1SswHogd2HYdm+DJGhURoSojlk/dCm4tDDpy+Plzc=; b=sLQKIYZY+68cO0laziAmkBaUp/4C3vdLXkqBCjMiXkXFoVbJKZfRqLvCSP50RCH5hG Y9Qew1s5qO5ngg3g5EyJpWKVx+Bvn4wOrmroLckYnqGBHdFgNP0J7cTchbzMFIBmfkx8 V9W3xUBaxJ2wkPmKzGnI5idqVCXHWiHxJILvvNyEsz1B6palLLn+u/CkFT4LiIcxhl5U Fvb6p/8HtuS4uVXCur832gJA9CW7Q1eOY6Ck7UxfUR8PZEnhn3qXGkjG+Gq+o4da9hLW i16cXbLo/nJSd/XaeU1e8CE7vw5/rBXgZk3QO6tZDBvolWIcTh2kr+P6Hl+HE+qrtFrG D/GQ== X-Gm-Message-State: ACgBeo3g251oJXelaEnCnc/C8/DoPwRGiSJPsI5A3RmvFxJgn0CCT4H4 uBEimzPEQeD3heukqHdzjgKNaA== X-Google-Smtp-Source: AA6agR6XAn25lwoKn04LJu4ycH59kHbRg8DdCtEwqTycQaCiFYXeFkDEbZF8JhKF9qSbtzmZIYGbKA== X-Received: by 2002:a17:902:d4c6:b0:16d:2f7f:9a71 with SMTP id o6-20020a170902d4c600b0016d2f7f9a71mr974863plg.36.1659047712638; Thu, 28 Jul 2022 15:35:12 -0700 (PDT) Received: from google.com (7.104.168.34.bc.googleusercontent.com. [34.168.104.7]) by smtp.gmail.com with ESMTPSA id ix2-20020a170902f80200b0016c5306917fsm1883805plb.53.2022.07.28.15.35.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Jul 2022 15:35:11 -0700 (PDT) Date: Thu, 28 Jul 2022 22:35:08 +0000 From: Sean Christopherson To: Paolo Bonzini Cc: Vitaly Kuznetsov , kvm@vger.kernel.org, Anirudh Rayabharam , Wanpeng Li , Jim Mattson , Maxim Levitsky , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v4 09/25] KVM: VMX: nVMX: Support TSC scaling and PERF_GLOBAL_CTRL with enlightened VMCS Message-ID: References: <20220714091327.1085353-1-vkuznets@redhat.com> <20220714091327.1085353-10-vkuznets@redhat.com> <48de7ea7-fc1a-6a83-3d6f-e04d26ea2f05@redhat.com> <870d507d-a516-5601-4d21-2bfd571cf008@redhat.com> <62ac29cb-3270-a810-bad1-3692da448016@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <62ac29cb-3270-a810-bad1-3692da448016@redhat.com> Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org On Fri, Jul 29, 2022, Paolo Bonzini wrote: > On 7/29/22 00:13, Sean Christopherson wrote: > > The only flaw in this is if KVM gets handed a CPUID model that enumerates support > > for 2025 (or whenever the next update comes) but not 2022. Hmm, though if Microsoft > > defines each new "version" as a full superset, then even that theoretical bug goes > > away. I'm happy to be optimistic for once and give this a shot. I definitely like > > that it makes it easier to see the deltas between versions. > > Okay, I have queued the series but I still haven't gone through all the > comments. So this will _not_ be in the 5.21 pull request. I assume you meant 5.20? > The first patch also needs a bit more thought to figure out the impact on > userspace and whether we can consider syndbg niche enough to not care. > > Paolo >