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 717FBC282C8 for ; Mon, 28 Jan 2019 16:25:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 301312171F for ; Mon, 28 Jan 2019 16:25:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548692754; bh=Of0+ciTKF5ckaOvnfYQJQySgvKnLy7VhTcoGe8Ub42A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=dlFIs4lrlOToo+7j/qllODzfqetnqlkoj9zXSHmUh4lwhYENPfSnG5SmU5wtzkIuF fy56ILxGQ1P10JHaklmVJbJAA3HU2Rwz5jJHnH4jEYxD/MRNxMrabLHA9kvWEfXCKQ 3gqC4q7OyWEqSXcLMhL0hURtgNiOhpEpYfvE2IcY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390069AbfA1QZw (ORCPT ); Mon, 28 Jan 2019 11:25:52 -0500 Received: from mail.kernel.org ([198.145.29.99]:34804 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390039AbfA1QZt (ORCPT ); Mon, 28 Jan 2019 11:25:49 -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 9A8432084A; Mon, 28 Jan 2019 16:25:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548692748; bh=Of0+ciTKF5ckaOvnfYQJQySgvKnLy7VhTcoGe8Ub42A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GLJzNo8UNamFOtRZ1JDRRqg5Um8EbhA7JiA+CY7gei5lWf9AAV7jLaZl4aKDKcrLe 1CdWLpMnyHdt3C7b65A2P6V+0b/Bxl4US3Hs+zATV/+RpE24Ydl6GyQdrVmTOFRGW+ kAM/T5Gni9dCkS7RuCB7XmtKvE8QUXjlB3cbGzxk= 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 4.4 61/80] KVM: x86: svm: report MSR_IA32_MCG_EXT_CTL as unsupported Date: Mon, 28 Jan 2019 11:23:42 -0500 Message-Id: <20190128162401.58841-61-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190128162401.58841-1-sashal@kernel.org> References: <20190128162401.58841-1-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 ecdf724da371..7ce1a19d9d8b 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -4156,6 +4156,13 @@ 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