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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 F1348C04AB4 for ; Fri, 17 May 2019 08:49:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C10AA2082E for ; Fri, 17 May 2019 08:49:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="PaW707s8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728110AbfEQIt5 (ORCPT ); Fri, 17 May 2019 04:49:57 -0400 Received: from mail-pg1-f196.google.com ([209.85.215.196]:43617 "EHLO mail-pg1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727624AbfEQIt4 (ORCPT ); Fri, 17 May 2019 04:49:56 -0400 Received: by mail-pg1-f196.google.com with SMTP id t22so2977662pgi.10; Fri, 17 May 2019 01:49:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=9I+lX7qkOYzggWtQec+1m6I5euArD7SEmoWKuSnERRI=; b=PaW707s8aG5UEv/PL/RpVgZMRPo/yXTGiv/I0BSmqeqLzCCzlveC2OIIVi79sHPSaH tM6P+W5oVQbCKsTjX7CL1gOk0fCIzCjO0CacoL6mzR9QT7ueQj4pg5Ump9BZkwbbl+1t a2D8p/tXSYhyJZOtIlID2Tcwng1SolxVJgCEdwq0nBCbJw7DNcuS/UMGL8C0TUb6BFPl LjRI3LcYt84a5Uq48zn4KXpI2K6mVMi+4OmRwzEs4nslVmHKWJF8rshg+U3YcMDXs7ZF FQW2zgzMck7acr9+tPQnwsuDEUkYYT/lQdJ8NxiFG6Scpx006rXv3N9CtaHICpVIf7EV /arg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=9I+lX7qkOYzggWtQec+1m6I5euArD7SEmoWKuSnERRI=; b=oyFooB4UPaqNbv2DyjQlIDAmTwxkD6D2ALjSuK06s4QBSCPASCaKz0/yDBFQj8IWC0 hrJ23izyFH5QB6kGpRXrH+5x8VXxkuCbjJX0whKUv6Ltm7ZH00iaXnnYlgCWvyIWQE22 wfpWoG3Q4VWMjHgCPESvXJP7DqYmmU05pSMg+v6TC0/YOVwbvAfaeRysClHfXvtTxtJb Nv7h2N0mcK/oPLAgaDTnbFvkdWRK5LRUfJQBZRm8uuIVHcwc16y/Xfvx3TvxIqt/UmjZ RyaFj36j0EMQycM8qa0SeqoF1VPQGj8DQxVxDP0PMse0V2OVc/Xy8YyvV4WA/O+r1BhH pSNg== X-Gm-Message-State: APjAAAVz7phDLUMsVckfa8g/QCoo3Oyx45dOykr9hH8EhvT0dP3Rvqxg R3QmqXOmf4Y30rDj1sCfw+5ZeIgI X-Google-Smtp-Source: APXvYqwFYB1b7T68JzkdwK3+oTP4wh54dJfjJWuzNZcQtn+5UzG7e3oluVqdg4LO8ooo1ku5XcM3Ug== X-Received: by 2002:a63:e408:: with SMTP id a8mr55686792pgi.146.1558082995724; Fri, 17 May 2019 01:49:55 -0700 (PDT) Received: from localhost.localdomain ([203.205.141.123]) by smtp.googlemail.com with ESMTPSA id 63sm10417127pfu.95.2019.05.17.01.49.53 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 17 May 2019 01:49:54 -0700 (PDT) From: Wanpeng Li X-Google-Original-From: Wanpeng Li To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Paolo Bonzini , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Sean Christopherson , Liran Alon Subject: [PATCH 1/4] KVM: x86: Disable intercept for CORE cstate read Date: Fri, 17 May 2019 16:49:47 +0800 Message-Id: <1558082990-7822-1-git-send-email-wanpengli@tencent.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wanpeng Li Allow guest reads CORE cstate when exposing host CPU power management capabilities to the guest. PKG cstate is restricted to avoid a guest to get the whole package information in multi-tenant scenario. Cc: Paolo Bonzini Cc: Radim Krčmář Cc: Sean Christopherson Cc: Liran Alon Signed-off-by: Wanpeng Li --- arch/x86/kvm/vmx/vmx.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 771d3bf..b0d6be5 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -6615,6 +6615,12 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) vmx_disable_intercept_for_msr(msr_bitmap, MSR_IA32_SYSENTER_CS, MSR_TYPE_RW); vmx_disable_intercept_for_msr(msr_bitmap, MSR_IA32_SYSENTER_ESP, MSR_TYPE_RW); vmx_disable_intercept_for_msr(msr_bitmap, MSR_IA32_SYSENTER_EIP, MSR_TYPE_RW); + if (kvm_mwait_in_guest(kvm)) { + vmx_disable_intercept_for_msr(msr_bitmap, MSR_CORE_C1_RES, MSR_TYPE_R); + vmx_disable_intercept_for_msr(msr_bitmap, MSR_CORE_C3_RESIDENCY, MSR_TYPE_R); + vmx_disable_intercept_for_msr(msr_bitmap, MSR_CORE_C6_RESIDENCY, MSR_TYPE_R); + vmx_disable_intercept_for_msr(msr_bitmap, MSR_CORE_C7_RESIDENCY, MSR_TYPE_R); + } vmx->msr_bitmap_mode = 0; vmx->loaded_vmcs = &vmx->vmcs01; -- 2.7.4