From patchwork Mon Apr 19 16:01:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 12212235 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=-15.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 CED89C43460 for ; Mon, 19 Apr 2021 16:03:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B1E5161369 for ; Mon, 19 Apr 2021 16:03:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242522AbhDSQDe (ORCPT ); Mon, 19 Apr 2021 12:03:34 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:57958 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242256AbhDSQCl (ORCPT ); Mon, 19 Apr 2021 12:02:41 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1618848130; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=JYLMkrtsdldndITXa28QWcVF8pTMQEZbqc599hrP62A=; b=h8X2cKsLIOmnc+7uMe6WH28ItewdI5mgVCmSYLj/nCu1pZTYHsJ2DaOZiA71DStwaA+dYm dZMde7gy7LTHyy6ZA4KqcD2nXQJKEdNvhNYUYsB71k6nMW5eWpXSZRc2yJU/0RVOFN9SHb uUDSQduX7s1wISZ3KCeqLfaL701/v64= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-191-lGHb20CVOke2uYequEMMCg-1; Mon, 19 Apr 2021 12:02:09 -0400 X-MC-Unique: lGHb20CVOke2uYequEMMCg-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id B4E396D4E8; Mon, 19 Apr 2021 16:02:07 +0000 (UTC) Received: from vitty.brq.redhat.com (unknown [10.40.193.113]) by smtp.corp.redhat.com (Postfix) with ESMTP id BA9939CA0; Mon, 19 Apr 2021 16:02:05 +0000 (UTC) From: Vitaly Kuznetsov To: kvm@vger.kernel.org, Paolo Bonzini Cc: Sean Christopherson , Wanpeng Li , Jim Mattson , Siddharth Chandrasekaran , linux-kernel@vger.kernel.org Subject: [PATCH 15/30] KVM: x86: hyper-v: Honor HV_ACCESS_REENLIGHTENMENT privilege bit Date: Mon, 19 Apr 2021 18:01:12 +0200 Message-Id: <20210419160127.192712-16-vkuznets@redhat.com> In-Reply-To: <20210419160127.192712-1-vkuznets@redhat.com> References: <20210419160127.192712-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org HV_X64_MSR_REENLIGHTENMENT_CONTROL/HV_X64_MSR_TSC_EMULATION_CONTROL/ HV_X64_MSR_TSC_EMULATION_STATUS are only available to guest when HV_ACCESS_REENLIGHTENMENT bit is exposed. Signed-off-by: Vitaly Kuznetsov --- arch/x86/kvm/hyperv.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 8821981e17d3..f416c9de73cb 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -1248,6 +1248,11 @@ static bool hv_check_msr_access(struct kvm_vcpu_hv *hv_vcpu, u32 msr) case HV_X64_MSR_APIC_FREQUENCY: return hv_vcpu->cpuid_cache.features_eax & HV_ACCESS_FREQUENCY_MSRS; + case HV_X64_MSR_REENLIGHTENMENT_CONTROL: + case HV_X64_MSR_TSC_EMULATION_CONTROL: + case HV_X64_MSR_TSC_EMULATION_STATUS: + return hv_vcpu->cpuid_cache.features_eax & + HV_ACCESS_REENLIGHTENMENT; default: break; }