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 711E0C433EF for ; Thu, 7 Jul 2022 16:40:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235709AbiGGQkO (ORCPT ); Thu, 7 Jul 2022 12:40:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46372 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235634AbiGGQkN (ORCPT ); Thu, 7 Jul 2022 12:40:13 -0400 Received: from mail-pf1-x436.google.com (mail-pf1-x436.google.com [IPv6:2607:f8b0:4864:20::436]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A877DAE5D for ; Thu, 7 Jul 2022 09:40:12 -0700 (PDT) Received: by mail-pf1-x436.google.com with SMTP id n12so20554820pfq.0 for ; Thu, 07 Jul 2022 09:40:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=yD9JOmzp/dFDreTYsU04JyTwToOKdMohWmxTbaY6njU=; b=DKgr4DUtPFkc2YDiqeIjerue3AdI7QvRfGK/IvbHd5WNTyaO9jlMo3t7VDNIsgycBd t6lQ87zUS2Pl9GJwRhjoGWGceAce6eVnnyxitqo+Eu/Xz6OmKcSmrDovq2/kK3RmsXdV 4Zfim6Y0ZksMG/veV2zgbBBog0DqiGhbWO+r9Zf1/uquXY+OPCTFiD69FwWkhS4iQPWc isKhI1Ls+LByweIbakofzyOp7saougvp7qWNGpDu/aFrNFfG2Q7M4lH04daUChzK80Hu Nb4IOaA1dNWe/SQrp94mkgbyfb8qGJO4J5uEYBdK49Z06hXbDSRWKRiMd89ea36xMfa6 FH2A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=yD9JOmzp/dFDreTYsU04JyTwToOKdMohWmxTbaY6njU=; b=EL3Gia2lL5PH55YIZzusFu8nrtOD3PwNvTpcRTtjChYFs8FcA+avCZmOFWhG8RUdTM 0WQEx3etnMblxRaJWjEGN/+H4OnCDvJIrz14FCVzsAmKerbePdEJAcHBZ2pWv3PdRW2p Y79JeKoaaAomaaHiC0iMCyLGOyP9kwDS+3NTGbKohRBXXjs7NBcWhEtpgE36zczfBZHf 2ty8EGNUNB4qoCKU9DLjSaJcqMUvBG4/cL/b6oDoRnoBKKKmol84+5q2Cgmvb3/4l1ed Hr10lO+8nZ/zb5dACwDYzqB6Gjd6OjAG+GFVVsBi5mDzD1Dy8VJw2VIisLFDbikaaS+I S++w== X-Gm-Message-State: AJIora9pbJrvYTJ98ZLAbpTP3rsGMQKtUsbKsDCH4+IAMYW25CRpx0P0 JrhseSOuwcteexabJl9ec1JzwA== X-Google-Smtp-Source: AGRyM1uRun8/gyQJJismerB54U/dXNI8KUubj/l+07lYiNiUSieBPfgfo3nCJCkX+KWvZ5rnxkhc/Q== X-Received: by 2002:a17:90b:4f4e:b0:1ef:ab40:b345 with SMTP id pj14-20020a17090b4f4e00b001efab40b345mr6235651pjb.226.1657212012079; Thu, 07 Jul 2022 09:40:12 -0700 (PDT) Received: from google.com (123.65.230.35.bc.googleusercontent.com. [35.230.65.123]) by smtp.gmail.com with ESMTPSA id oa1-20020a17090b1bc100b001ec84b0f199sm3505764pjb.1.2022.07.07.09.40.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Jul 2022 09:40:11 -0700 (PDT) Date: Thu, 7 Jul 2022 16:40:07 +0000 From: Sean Christopherson To: Vitaly Kuznetsov Cc: kvm@vger.kernel.org, Paolo Bonzini , Anirudh Rayabharam , Wanpeng Li , Jim Mattson , Maxim Levitsky , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 06/28] KVM: nVMX: Introduce KVM_CAP_HYPERV_ENLIGHTENED_VMCS2 Message-ID: References: <20220629150625.238286-1-vkuznets@redhat.com> <20220629150625.238286-7-vkuznets@redhat.com> <87o7y1qm5t.fsf@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org On Thu, Jul 07, 2022, Sean Christopherson wrote: > On Thu, Jul 07, 2022, Vitaly Kuznetsov wrote: > > luckily, Microsoft added a new PV CPUID feature bit inidicating the support > > for the new features in eVMCSv1 so KVM can just observe whether the bit was > > set by VMM or not and filter accordingly. > > If there's a CPUID feature bit, why does KVM need to invent its own revision scheme? Doh, just saw your other mail.