From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753359AbdGSNfo (ORCPT ); Wed, 19 Jul 2017 09:35:44 -0400 Received: from mail-bl2nam02on0071.outbound.protection.outlook.com ([104.47.38.71]:16667 "EHLO NAM02-BL2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752811AbdGSNfl (ORCPT ); Wed, 19 Jul 2017 09:35:41 -0400 Authentication-Results: amd.com; dkim=none (message not signed) header.d=none;amd.com; dmarc=none action=none header.from=amd.com; Cc: brijesh.singh@amd.com, pbonzini@redhat.com, joro@8bytes.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, Thomas.Lendacky@amd.com Subject: Re: [PATCH v2] KVM: x86: Avoid guest page table walk when gpa_available is set To: =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= References: <1495206749-25393-1-git-send-email-brijesh.singh@amd.com> <20170719111939.GA16149@potion> From: Brijesh Singh Message-ID: <3d6d983e-b8e2-ac6d-409e-38e96f2da940@amd.com> Date: Wed, 19 Jul 2017 08:35:31 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: <20170719111939.GA16149@potion> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-Originating-IP: [165.204.77.1] X-ClientProxiedBy: BN6PR04CA0044.namprd04.prod.outlook.com (10.174.93.161) To BY2PR12MB0148.namprd12.prod.outlook.com (10.162.82.21) X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: eb97e4d4-0b5d-49ac-153a-08d4ceab0a40 X-MS-Office365-Filtering-HT: Tenant X-Microsoft-Antispam: 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1;BY2PR12MB0148;20:30CWI7O4KZHoXeAhEpNyR7bt+bY3fzbLXMnOjJCF7l0p3yknUbcCfVi5T92xMF2vzQZIttwCel/8IwlU8/+BhK8aWjMVxMtxBj7OO+C3J2b9YqWmHOuY20UThNzhSaYeYHD9cwoxXCLznaLT4jqJKavt35aozDnAwG0mjwvN9Lm64G+pDX6e2CGlIaTDmJkdaOavcL5+52q9sJvi1RLbCapLRYoxobEOmlsC54XIzUDBiWNKS46JTP+F3MiLAT20 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Jul 2017 13:35:35.8672 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY2PR12MB0148 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/19/2017 06:19 AM, Radim Krčmář wrote: > 2017-07-17 16:32-0500, Brijesh Singh: >> Hi Paolo and Radim >> >> Any comments on this patch, I could not find it in 4.13-2 branch. >> >> Please let me know if you want to fix something, or want me to >> refresh and resend the patch. > > Sorry, I tried it during the merge window, but it didn't pass tests on > VMX and I got distracted by other bugs before looking into the cause. > > Can you reproduce the fail? > No worries, thanks. I can try to reproduce it, are you running kvm-unittest or something different? IIRC, VMX does not set the gpa_available flag hence I am wondering what did I miss in the patch to trigger the failure. I will debug it and let you know. -Brijesh