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=-5.5 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 9EDE4C433E1 for ; Wed, 22 Jul 2020 03:03:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 80A2320792 for ; Wed, 22 Jul 2020 03:03:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731894AbgGVDDp (ORCPT ); Tue, 21 Jul 2020 23:03:45 -0400 Received: from mail.windriver.com ([147.11.1.11]:46385 "EHLO mail.windriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731781AbgGVDDo (ORCPT ); Tue, 21 Jul 2020 23:03:44 -0400 Received: from ALA-HCA.corp.ad.wrs.com (ala-hca.corp.ad.wrs.com [147.11.189.40]) by mail.windriver.com (8.15.2/8.15.2) with ESMTPS id 06M33eAQ005447 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL); Tue, 21 Jul 2020 20:03:41 -0700 (PDT) Received: from [128.224.162.214] (128.224.162.214) by ALA-HCA.corp.ad.wrs.com (147.11.189.50) with Microsoft SMTP Server id 14.3.487.0; Tue, 21 Jul 2020 20:03:40 -0700 Subject: Re: Subject: Re: [PATCH 1/1] iommu/vt-d: Skip TE disabling on quirky gfx dedicated iommu To: Lu Baolu CC: "linux-kernel@vger.kernel.org" , "iommu@lists.linux-foundation.org" , "stable@vger.kernel.org" References: <0f4b6760-bb8f-ebd3-ab9d-4ecba819883c@linux.intel.com> From: Jun Miao Message-ID: Date: Wed, 22 Jul 2020 11:03:38 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <0f4b6760-bb8f-ebd3-ab9d-4ecba819883c@linux.intel.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 7/22/20 10:40 AM, Lu Baolu wrote: > Hi Jun, > > On 7/22/20 10:26 AM, Miao, Jun wrote: >>>> Kernel panic - not syncing: DMAR hardware is malfunctioning >>>> CPU: 0 PID: 347 Comm: rtcwake Not tainted 5.4.0-yocto-standard #124 >>>> Hardware name: Intel Corporation Ice Lake Client Platform/IceLake U >>>> DDR4 >>>> SODIMM PD RVP TLC, BIOS ICLSFWR1.R00.3162.A00.1904162000 04/16/2019 >>>> Call Trace: >>>>    dump_stack+0x59/0x75 >>>>    panic+0xff/0x2d4 >>>>    iommu_disable_translation+0x88/0x90 >>>>    iommu_suspend+0x12f/0x1b0 >>>>    syscore_suspend+0x6c/0x220 >>>>    suspend_devices_and_enter+0x313/0x840 >>>>    pm_suspend+0x30d/0x390 >>>>    state_store+0x82/0xf0 >>>>    kobj_attr_store+0x12/0x20 >>>>    sysfs_kf_write+0x3c/0x50 >>>>    kernfs_fop_write+0x11d/0x190 >>>>    __vfs_write+0x1b/0x40 >>>>    vfs_write+0xc6/0x1d0 >>>>    ksys_write+0x5e/0xe0 >>>>    __x64_sys_write+0x1a/0x20 >>>>    do_syscall_64+0x4d/0x150 >>>>    entry_SYSCALL_64_after_hwframe+0x44/0xa9 >>>> RIP: 0033:0x7f97b8080113 >>>> Code: 8b 15 81 bd 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 >>>> 0f 1f 00 >>>> 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 >>>> f0 ff ff >>>> 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18 >>>> RSP: 002b:00007ffcfa6f48b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 >>>> RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f97b8080113 >>>> RDX: 0000000000000004 RSI: 000055e7db03b700 RDI: 0000000000000004 >>>> RBP: 000055e7db03b700 R08: 000055e7db03b700 R09: 0000000000000004 >>>> R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000004 >>>> R13: 000055e7db039380 R14: 0000000000000004 R15: 00007f97b814d700 >>>> Kernel Offset: 0x38a00000 from 0xffffffff81000000 (relocation range: >>>> 0xffffffff80000000-0xffffffffbfffffff) >>>> ---[ end Kernel panic - not syncing: DMAR hardware is >>>> malfunctioning ]--- >> > > Do you mean that system hangs in iommu_disable_translation() without > this fix. > Yes ,From the call trace and i also read the DMARD_GCMD_RGS is wrong without this patch. >> [S3 successfully with the patch] > > And, this failure disappeared after you applied this fix? > > Best regards, > baolu