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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C79AFC3DA7A for ; Thu, 5 Jan 2023 10:38:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232033AbjAEKiV (ORCPT ); Thu, 5 Jan 2023 05:38:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59132 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232673AbjAEKh6 (ORCPT ); Thu, 5 Jan 2023 05:37:58 -0500 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CD2F240846; Thu, 5 Jan 2023 02:37:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1672915076; x=1704451076; h=message-id:date:mime-version:cc:subject:to:references: from:in-reply-to:content-transfer-encoding; bh=gjl8ZM8i09/OJywBgKdXkKMYg3xJWeKujz7bT+uBzmg=; b=S04rYYAtV4pD2z2/LbeNS3Zskuif3GqUoeMXfNv//Bg+AvEOaXIu9k3X dnsWHTwmBNHI0xM6b7YRS5Din+LI8JOAIEdw5GCoKEXGu50CG+x2rh0eL Dt9kXB7tvbcaD3owyCbg+g3FBxJ7Wh4CkQjkCE02//opVhpUW65rhJk+7 GjYdE5vlMyU2+jWZbomiXnKFo9vS3Gt5kPNYZVhwlfnG9CU8gWIdPea27 s4WYJqdE+9izbVex4ozobJUb/tdb61bwd+RjzI30BXOVfhaBJMYiWskgB 7MUlxnGuMx21kqBTCibW+TwlYGCA4TePAAFbYC5L41V11abV4wg4FQj1i A==; X-IronPort-AV: E=McAfee;i="6500,9779,10580"; a="323403225" X-IronPort-AV: E=Sophos;i="5.96,302,1665471600"; d="scan'208";a="323403225" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jan 2023 02:37:56 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10580"; a="686069531" X-IronPort-AV: E=Sophos;i="5.96,302,1665471600"; d="scan'208";a="686069531" Received: from blu2-mobl3.ccr.corp.intel.com (HELO [10.254.211.114]) ([10.254.211.114]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jan 2023 02:37:53 -0800 Message-ID: <6b5baa30-c218-0845-d6c2-32ac21ed6a6d@linux.intel.com> Date: Thu, 5 Jan 2023 18:37:51 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.6.1 Cc: baolu.lu@linux.intel.com, Joerg Roedel , "iommu@lists.linux.dev" , LKML , "regressions@lists.linux.dev" , Linux PCI , Bjorn Helgaas Subject: =?UTF-8?Q?Re=3a_=5bregression=2c_bisected=2c_pci/iommu=5d_Bug=c2=a0?= =?UTF-8?Q?216865_-_Black_screen_when_amdgpu_started_during_6=2e2-rc1_boot_w?= =?UTF-8?Q?ith_AMD_IOMMU_enabled?= To: Vasant Hegde , Matt Fagnani , Thorsten Leemhuis References: <15d0f9ff-2a56-b3e9-5b45-e6b23300ae3b@leemhuis.info> <5aa0e698-f715-0481-36e5-46505024ebc1@bell.net> <157c4ca4-370a-5d7e-fe32-c64d934f6979@amd.com> <223ee6d6-70ea-1d53-8bc2-2d22201d8dde@bell.net> <6fff9d10-f77f-e55a-9020-8a1bd34cf508@amd.com> Content-Language: en-US From: Baolu Lu In-Reply-To: <6fff9d10-f77f-e55a-9020-8a1bd34cf508@amd.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On 2023/1/5 18:27, Vasant Hegde wrote: > On 1/5/2023 6:39 AM, Matt Fagnani wrote: >> I built 6.2-rc2 with the patch applied. The same black screen problem happened >> with 6.2-rc2 with the patch. I tried to use early kdump with 6.2-rc2 with the >> patch twice by panicking the kernel with sysrq+alt+c after the black screen >> happened. The system rebooted after about 10-20 seconds both times, but no kdump >> and dmesg files were saved in /var/crash. I'm attaching the lspci -vvv output as >> requested. >> > Thanks for testing. As mentioned earlier I was not expecting this patch to fix > the black screen issue. It should fix kernel warnings and IOMMU page fault > related call traces. By any chance do you have the kernel boot logs? > > > @Baolu, > Looking into lspci output, it doesn't list ACS feature for Graphics card. So > with your fix it didn't enable PASID and hence it failed to boot. So do you mind telling why does the PASID need to be enabled for the graphic device? Or in another word, what does the graphic driver use the PASID for? -- Best regards, baolu