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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 E5ACAC282C8 for ; Mon, 28 Jan 2019 16:18:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AA06520879 for ; Mon, 28 Jan 2019 16:18:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548692291; bh=n/+/yENmZZH4FA6lewom96Xq2U5PNkR/sF1iCWt+qQI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=GnZqc6ZA61k7WNxRk9IermfohMfbb2Apf9tUlKSMbBWoUmQf+5blbnivawecGMJQ+ rZ7tMmLJDnETwvl7CtvnCcEMkT+TjxUuC6O/xFbjpaq5fE/h2cveeB+99HT8Nb4HXZ Ngj585Zs0Q/RrJC48rBdtK6jIxcv0yYbDXDb21pE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388360AbfA1QSK (ORCPT ); Mon, 28 Jan 2019 11:18:10 -0500 Received: from mail.kernel.org ([198.145.29.99]:52238 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388324AbfA1QR7 (ORCPT ); Mon, 28 Jan 2019 11:17:59 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3CF3621741; Mon, 28 Jan 2019 16:17:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548692278; bh=n/+/yENmZZH4FA6lewom96Xq2U5PNkR/sF1iCWt+qQI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eQzQIaFMZHdHOOHYLA8r5qMPBseQ6LJL20dWnHtAqW46BptFwy39CJLeI6xw0S0Di T/Rv1mgPPl2x8/S4UwviaT6uKWeGrJptAJYnx95k5Qrj+kvaop/Z8D7nIPYhYLJax2 lzP1gpMSEg6DERfTDvwU68EigdCxFoNP7CxP4LXg= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Vitaly Kuznetsov , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Sasha Levin , kvm@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 137/170] KVM: x86: svm: report MSR_IA32_MCG_EXT_CTL as unsupported Date: Mon, 28 Jan 2019 11:11:27 -0500 Message-Id: <20190128161200.55107-137-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190128161200.55107-1-sashal@kernel.org> References: <20190128161200.55107-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vitaly Kuznetsov [ Upstream commit e87555e550cef4941579cd879759a7c0dee24e68 ] AMD doesn't seem to implement MSR_IA32_MCG_EXT_CTL and svm code in kvm knows nothing about it, however, this MSR is among emulated_msrs and thus returned with KVM_GET_MSR_INDEX_LIST. The consequent KVM_GET_MSRS, of course, fails. Report the MSR as unsupported to not confuse userspace. Signed-off-by: Vitaly Kuznetsov Signed-off-by: Radim Krčmář Signed-off-by: Sasha Levin --- arch/x86/kvm/svm.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 4dc79d139810..656ac12f5439 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -5319,6 +5319,13 @@ static bool svm_cpu_has_accelerated_tpr(void) static bool svm_has_emulated_msr(int index) { + switch (index) { + case MSR_IA32_MCG_EXT_CTL: + return false; + default: + break; + } + return true; } -- 2.19.1