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 4E248C41513 for ; Wed, 16 Aug 2023 13:45:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245692AbjHPNou (ORCPT ); Wed, 16 Aug 2023 09:44:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52986 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343496AbjHPNop (ORCPT ); Wed, 16 Aug 2023 09:44:45 -0400 Received: from mail-pg1-x54a.google.com (mail-pg1-x54a.google.com [IPv6:2607:f8b0:4864:20::54a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7E005109 for ; Wed, 16 Aug 2023 06:44:44 -0700 (PDT) Received: by mail-pg1-x54a.google.com with SMTP id 41be03b00d2f7-565ea69bb0cso1705102a12.0 for ; Wed, 16 Aug 2023 06:44:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1692193484; x=1692798284; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=DfKYErMF9EpbQzj7prUXo+VJmVciw7snB0QH6nUOx0c=; b=NDH2iIAX5DXaSyyrW5vcJU1QHoAqNAj4qeESAvSaADuuHnudkS9qxr/pAW3gJDLDB/ Y8HD7RVNAVj7RYXVev45WRJLuPblUswv6kJAkrkMQeL+Go0rSE+vPx7xDOdMzrRXJHJc JmVYCDx+Kqnw2tEIYYerdWe53Qpl68ZgKPeF6SkNFSJ7+95bNJMQwtv6XhB0fx6B7q6Y R0yqPE9GlRqP3Lv1nvpXA0edRxQZMYyIR5v7wLbffnQ3i2FcH+UK4Ad1HDT7EFEjgweb 6Q+SJlNnSDG1pKxb8LjDW300bUJPbnkFy3F7iJir1VF8MgiNUbWj/NuXF0k6t/a+BrdN C0Pw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692193484; x=1692798284; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=DfKYErMF9EpbQzj7prUXo+VJmVciw7snB0QH6nUOx0c=; b=cyMe1Nin4tBgKqTdCW5ja/MltYITXC/kYO0h5n122fvZi/oQ78bmRv9QuYVsbNsCKN 65Enf8ar4ZAF3KXnnF1NOsjru0WoaO+LeAj7em9+DNigJ75YxgUdUFuZEaotIS8E+qK2 L/qThkoCr2yqRl4eXyArPXLjy2hv/lDCaBqMjGw0+2cATMDK2R8uXuN48iidmFiXigie eitRzvx/MoTQgjWV5e4vvcWQQ81TA2mS95yd2y4p7vmNJLG3cl8HyoWcQA2sylr57pqV zTY9mPNQIlpawDhelpOk/Eci0Z+9SI+mIJHOSzdvQq7qfYRL+LQU1fvIaxefTBQEST43 sAOw== X-Gm-Message-State: AOJu0YwnL+xYmrU3kede4RcBlsibSKHwS68gRDssNCkeGBjB8wvi+UnX bvPB+JgGUKbVDT0zwCD8pV/3oqNPJks= X-Google-Smtp-Source: AGHT+IGd4fYUCjDU25ByWI8JrVrsykv5J74DbQAeMl2oHpahXX74KE6wec7C7Du6Z6kirONFwDHU56tHcMQ= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a63:77c7:0:b0:565:8280:eac5 with SMTP id s190-20020a6377c7000000b005658280eac5mr370096pgc.0.1692193483950; Wed, 16 Aug 2023 06:44:43 -0700 (PDT) Date: Wed, 16 Aug 2023 06:44:42 -0700 In-Reply-To: <20230816063531.rq7tyrvceln5q4du@yy-desk-7060> Mime-Version: 1.0 References: <20230815203653.519297-1-seanjc@google.com> <20230815203653.519297-10-seanjc@google.com> <20230816063531.rq7tyrvceln5q4du@yy-desk-7060> Message-ID: Subject: Re: [PATCH v3 09/15] KVM: nSVM: Use KVM-governed feature framework to track "TSC scaling enabled" From: Sean Christopherson To: Yuan Yao Cc: Paolo Bonzini , Vitaly Kuznetsov , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Zeng Guang , Yuan Yao Content-Type: text/plain; charset="us-ascii" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Aug 16, 2023, Yuan Yao wrote: > On Tue, Aug 15, 2023 at 01:36:47PM -0700, Sean Christopherson wrote: > > @@ -2981,7 +2982,8 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) > > > > svm->tsc_ratio_msr = data; > > > > - if (svm->tsc_scaling_enabled && is_guest_mode(vcpu)) > > + if (guest_can_use(vcpu, X86_FEATURE_TSCRATEMSR) && > > + is_guest_mode(vcpu)) > > I prefer (is_guest_mode(vcpu) && ....), so I can skip them more quickly LOL. > but anyway depends on you :-) For this series, I want to do as much of a straight replacement as possible, i.e. not change any ordering unless it's "necessary".