Message ID | 20210419160127.192712-8-vkuznets@redhat.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
Return-Path: <kvm-owner@kernel.org> 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 D73B7C433B4 for <kvm@archiver.kernel.org>; Mon, 19 Apr 2021 16:02:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BC8E761279 for <kvm@archiver.kernel.org>; Mon, 19 Apr 2021 16:02:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241742AbhDSQCb (ORCPT <rfc822;kvm@archiver.kernel.org>); Mon, 19 Apr 2021 12:02:31 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:56656 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242066AbhDSQCZ (ORCPT <rfc822;kvm@vger.kernel.org>); Mon, 19 Apr 2021 12:02:25 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1618848115; 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=h1R5yPlUnCj4TQb/dRTqWCM2uesJJKLK9xUJ85iA3eI=; b=aeZkqZOx8S4Nt4xG177fKmVJ0W3BY6UdsLm/9e9UR4gFrEcwAcd7ySRa6Oze6idWPegXqG QthnHnxsefCTtslsECFmbI3K1gbyyrnm6+WaEfmrtevtluTO7nNRYA4qMmJVAFC6SuMzU5 kP4oEPYSVb7atEJwwDlm9Hfr5atCewE= 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-481-ykL1qk_PPNe6X47Zl7TYZA-1; Mon, 19 Apr 2021 12:01:51 -0400 X-MC-Unique: ykL1qk_PPNe6X47Zl7TYZA-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 34E541020C2C; Mon, 19 Apr 2021 16:01:50 +0000 (UTC) Received: from vitty.brq.redhat.com (unknown [10.40.193.113]) by smtp.corp.redhat.com (Postfix) with ESMTP id 71A2260636; Mon, 19 Apr 2021 16:01:48 +0000 (UTC) From: Vitaly Kuznetsov <vkuznets@redhat.com> To: kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com> Cc: Sean Christopherson <seanjc@google.com>, Wanpeng Li <wanpengli@tencent.com>, Jim Mattson <jmattson@google.com>, Siddharth Chandrasekaran <sidcha@amazon.de>, linux-kernel@vger.kernel.org Subject: [PATCH 07/30] KVM: x86: hyper-v: Honor HV_MSR_TIME_REF_COUNT_AVAILABLE privilege bit Date: Mon, 19 Apr 2021 18:01:04 +0200 Message-Id: <20210419160127.192712-8-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: <kvm.vger.kernel.org> X-Mailing-List: kvm@vger.kernel.org |
Series |
KVM: x86: hyper-v: Fine-grained access check to Hyper-V hypercalls and MSRs
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diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 152d991ed033..0b2261a50ee8 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -1207,6 +1207,9 @@ static bool hv_check_msr_access(struct kvm_vcpu_hv *hv_vcpu, u32 msr) case HV_X64_MSR_VP_RUNTIME: return hv_vcpu->cpuid_cache.features_eax & HV_MSR_VP_RUNTIME_AVAILABLE; + case HV_X64_MSR_TIME_REF_COUNT: + return hv_vcpu->cpuid_cache.features_eax & + HV_MSR_TIME_REF_COUNT_AVAILABLE; default: break; }
HV_X64_MSR_TIME_REF_COUNT is only available to guest when HV_MSR_TIME_REF_COUNT_AVAILABLE bit is exposed. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> --- arch/x86/kvm/hyperv.c | 3 +++ 1 file changed, 3 insertions(+)