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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 CFD9CC433E0 for ; Tue, 30 Jun 2020 07:52:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ACFD8207E8 for ; Tue, 30 Jun 2020 07:52:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731335AbgF3Hwq (ORCPT ); Tue, 30 Jun 2020 03:52:46 -0400 Received: from mga01.intel.com ([192.55.52.88]:11359 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731312AbgF3Hwp (ORCPT ); Tue, 30 Jun 2020 03:52:45 -0400 IronPort-SDR: 4uKteS3ft0b/qoHH5vZf6mopGpvd2k4pABT2Kez7Jk/GZDF3ffKAYxppDZqEHdKO0j1LcWPDzf CkYCeTMizuYA== X-IronPort-AV: E=McAfee;i="6000,8403,9666"; a="164181079" X-IronPort-AV: E=Sophos;i="5.75,296,1589266800"; d="scan'208";a="164181079" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Jun 2020 00:52:44 -0700 IronPort-SDR: eGGj2t6g5LUU1YhVwky6xRMNCWEVLwnbATlY9tpArRmc7dT1GHG5j1QV6jPn1Wb22N2/pWvd7O F2WuH6iRJGHw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,296,1589266800"; d="scan'208";a="266412260" Received: from blu2-mobl3.ccr.corp.intel.com (HELO [10.249.173.186]) ([10.249.173.186]) by fmsmga008.fm.intel.com with ESMTP; 30 Jun 2020 00:52:41 -0700 Cc: baolu.lu@linux.intel.com, David Woodhouse , Joerg Roedel , iommu@lists.linux-foundation.org, Linux Kernel Mailing List , Kai Heng Feng , "Raj, Ashok" , "Sun, Jian" Subject: Re: [Issue]platform/x86: iommu: System can't shutdown because iommu driver keeps checking the status of DMA_GSTS_TES To: Koba Ko References: <111dde48-8018-6d74-5df8-1534143f4de6@linux.intel.com> From: Lu Baolu Message-ID: <66cacbab-b04d-33f3-053e-4d554ac7c662@linux.intel.com> Date: Tue, 30 Jun 2020 15:52:40 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Koba, On 2020/6/30 15:31, Koba Ko wrote: > On Mon, Jun 15, 2020 at 3:20 PM Lu Baolu wrote: >> >> Hi Koba Ko, >> >> On 2020/6/15 11:19, Koba Ko wrote: >>> hi All, >>> I have a machine and there's only intel gpu. >>> the secureboot and vt-d is enabled in BIOS. >>> On the Ubuntu desktop, I do s2idle first and restart the machine. >>> The machine can't restart successfully, so I need to press the >>> power button to shutdown. >>> I tried each of the following and the issue can't be triggered. >>> 1. disable secure boot in BIOS. >>> 2. intel_iommu=off. >>> 3. intel_iomm=igfx_off. >>> 4. nomodeset >>> 5. i915.modeset=0. >>> >>> After I investigate further, find inte_iommu keeps checking the status >>> of DMA_GSTS_TES. >>> During the procedure of restart, the driver would disable iommu >>> translation and >>> check status of DMA_GSTS_TES until status of DMA_GSTS_TES is 0. >>> >>> If you need more information, I can provide it. >> >> Do you mind telling what platform is it? >> >> Best regards, >> baolu > Hi Baolu, > Sorry, i missed your email. > I'm running on TGL. > My colleague has reported this on bugzilla. > Have tested your patch and it works fine. > https://bugzilla.kernel.org/show_bug.cgi?id=208363 > > Could you explain more about these patches!? Why do we need a flag > for active iommu!? > We're still investigating this issue. If we find out more, I'll let you know. Thanks a lot for the reporting. Best regards, baolu