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=-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 3DE92C433ED for ; Mon, 19 Apr 2021 16:03:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2446361285 for ; Mon, 19 Apr 2021 16:03:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242544AbhDSQDl (ORCPT ); Mon, 19 Apr 2021 12:03:41 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:27290 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242292AbhDSQCs (ORCPT ); Mon, 19 Apr 2021 12:02:48 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1618848138; 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=6P3+cKPYdDKDmenZuGlj9cVt3ST/qjoajUXYcQIiasA=; b=HGawlsUaqxKE502wBB6nK8MWS6bCk12Ak3CUwHGHZxWQ+JdK0EqkJqJ5s7LDAj3bIDMQf/ OC//4sLb4spU4OrSlqotWlocbg6ZDwVRyk7/OwNRAQhuDP6CnsElLgyS7jbIY9Is70+nZd qaxoSRHe7MrZ/Yrlyo0Bv6mRYvQK1mg= 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-22-H4GGb8ebP_-M7ImHdvZVmA-1; Mon, 19 Apr 2021 12:02:14 -0400 X-MC-Unique: H4GGb8ebP_-M7ImHdvZVmA-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 3B6B587A83A; Mon, 19 Apr 2021 16:02:12 +0000 (UTC) Received: from vitty.brq.redhat.com (unknown [10.40.193.113]) by smtp.corp.redhat.com (Postfix) with ESMTP id 425AB9CA0; Mon, 19 Apr 2021 16:02:10 +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 17/30] KVM: x86: hyper-v: Honor HV_FEATURE_DEBUG_MSRS_AVAILABLE privilege bit Date: Mon, 19 Apr 2021 18:01:14 +0200 Message-Id: <20210419160127.192712-18-vkuznets@redhat.com> In-Reply-To: <20210419160127.192712-1-vkuznets@redhat.com> References: <20210419160127.192712-1-vkuznets@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Synthetic debugging MSRs (HV_X64_MSR_SYNDBG_CONTROL, HV_X64_MSR_SYNDBG_STATUS, HV_X64_MSR_SYNDBG_SEND_BUFFER, HV_X64_MSR_SYNDBG_RECV_BUFFER, HV_X64_MSR_SYNDBG_PENDING_BUFFER, HV_X64_MSR_SYNDBG_OPTIONS) are only available to guest when HV_FEATURE_DEBUG_MSRS_AVAILABLE bit is exposed. Signed-off-by: Vitaly Kuznetsov --- arch/x86/kvm/hyperv.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 43ebb53b6b38..f54385ffcdc0 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -1257,6 +1257,10 @@ static bool hv_check_msr_access(struct kvm_vcpu_hv *hv_vcpu, u32 msr) case HV_X64_MSR_CRASH_CTL: return hv_vcpu->cpuid_cache.features_edx & HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE; + case HV_X64_MSR_SYNDBG_OPTIONS: + case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER: + return hv_vcpu->cpuid_cache.features_edx & + HV_FEATURE_DEBUG_MSRS_AVAILABLE; default: break; } -- 2.30.2