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 C90B1C282CD for ; Mon, 28 Jan 2019 15:56:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8EED52175B for ; Mon, 28 Jan 2019 15:56:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548690995; bh=2SkpU5WDKqAiQhA31mXgu+ZvZowgKHu6K0FeU1yVvpA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=t6oW4pL2G+8a6L3Ofy/u8ybJTSkcU/JudW9TDiWyec0sGTHegnryW0dedtVxqRcF5 w4Mcw0Fx67vfnkS6Z1qNBn3frIVBT8oT8EgbJTVQ81+IhN1AIOAb2US7DIVTZzjrwC chMYY8Pw2ABiDfTxAtJZ2dsm3uKOIuVU3GLNBpow= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730125AbfA1P4e (ORCPT ); Mon, 28 Jan 2019 10:56:34 -0500 Received: from mail.kernel.org ([198.145.29.99]:42226 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729052AbfA1P4a (ORCPT ); Mon, 28 Jan 2019 10:56:30 -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 5479A21841; Mon, 28 Jan 2019 15:56:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548690990; bh=2SkpU5WDKqAiQhA31mXgu+ZvZowgKHu6K0FeU1yVvpA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ycSyBnisz+nNSah0LsF6WpoApl1bEhm1GBDt02W6rT7D/caVSj35nGyaCMphLpM2D vLJixDooNb7iiJCFUR13K8bRnvTvtdCF5cTLh8hRTH/OX9psKrz1XW7+QBv5GSY97b 0NxYj3pZHouIHpn0JMT5qxC8q97/s9XLGdXB+WwU= 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 4.20 257/304] KVM: x86: svm: report MSR_IA32_MCG_EXT_CTL as unsupported Date: Mon, 28 Jan 2019 10:42:54 -0500 Message-Id: <20190128154341.47195-257-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190128154341.47195-1-sashal@kernel.org> References: <20190128154341.47195-1-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 101f53ccf571..11641d9e7f6f 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -5836,6 +5836,13 @@ 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