Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S965662AbeAJMa3 (ORCPT <rfc822;ralf@linux-mips.org> + 1 other);
        Wed, 10 Jan 2018 07:30:29 -0500
Received: from mail-cys01nam02on0058.outbound.protection.outlook.com ([104.47.37.58]:57103
        "EHLO NAM02-CY1-obe.outbound.protection.outlook.com"
        rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP
        id S965536AbeAJM3k (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Wed, 10 Jan 2018 07:29:40 -0500
Authentication-Results: spf=none (sender IP is )
 smtp.mailfrom=Christian.Koenig@amd.com; 
Subject: Re: [BISECTED] v4.15-rc: Boot regression on x86_64/AMD
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Aaro Koskinen <aaro.koskinen@iki.fi>,
        Andy Shevchenko <andy.shevchenko@gmail.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-pci@vger.kernel.org,
        Boris Ostrovsky <boris.ostrovsky@oracle.com>,
        Juergen Gross <jgross@suse.com>,
        Alex Deucher <alexander.deucher@amd.com>,
        David Airlie <airlied@linux.ie>
References: <20180105220412.fzpwqe4zljdawr36@darkstar.musicnaut.iki.fi>
 <CA+55aFxCSWCG7ZvHW3AkLPzMPMAuG1BhL8fNgC0-JPYU4LZVow@mail.gmail.com>
 <CAErSpo7dOfabXk9rpZr=B87wK4_Ao9_moK89Ze0cyi6Mqb0Z+Q@mail.gmail.com>
 <628e2b58-b16b-5792-b4ef-88bec15ab779@amd.com>
 <20180109183856.GD31640@bhelgaas-glaptop.roam.corp.google.com>
From: =?UTF-8?Q?Christian_K=c3=b6nig?= <christian.koenig@amd.com>
Message-ID: <773c150c-a9e6-1246-50ee-2c468490db95@amd.com>
Date: Wed, 10 Jan 2018 13:29:22 +0100
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
 Thunderbird/52.5.0
MIME-Version: 1.0
In-Reply-To: <20180109183856.GD31640@bhelgaas-glaptop.roam.corp.google.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
Content-Language: en-US
X-Originating-IP: [2a02:908:1251:8fc0:4c6d:7233:b7e1:3b88]
X-ClientProxiedBy: HE1P191CA0024.EURP191.PROD.OUTLOOK.COM (10.172.132.162) To
 BN6PR12MB1300.namprd12.prod.outlook.com (10.168.227.150)
X-MS-PublicTrafficType: Email
X-MS-Office365-Filtering-HT: Tenant
X-MS-Office365-Filtering-Correlation-Id: a872026a-7c14-4018-8443-08d55825d088
X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:(48565401081)(4534020)(4602075)(4627115)(201703031133081)(201702281549075)(5600026)(4604075)(2017052603307)(7153060)(7193020);SRVR:BN6PR12MB1300;
X-Microsoft-Exchange-Diagnostics: 1;BN6PR12MB1300;3:D6GdisPw3t9OZNZPZjGk+YTscywQw07GUqS340l5o3CUQ3DuegR4Z3Jy5M3BxquC61YuYx5HmBMvkSguzzI8LtIDS2LBW5nAS/ybE/esS/aoHKaU/7gzK/O+QMQ8fCyP4SnILoRrtkPyPf/bzmEk/FTXfCrFmfLZ0dt/0TGkxRH+uVXvypWh3FJMku50adgMV5XNC6VutESoQzf3PrrfCrsa/7wqAHw6uNO1quTtuOmeS8AzH82Tu2A/F9MU6SSw;25:fvzJpz8EhVNpV/HX9mLIZyd31RqN24y/mfLlOr/KTY0xtx4c67uwaAzPBfWXPEiO0wS/89h07Paakk1HRVuqrIbPQU3qqQAG5cEopfKEuMcqThqPlALdDXRtsSwMC+G8NRenETkQoXDVnV21SYMrXclQ7oBGETHANs3DjfEPpFupCvhNMUSZ7ISkFbMkV0wcE3Y4slEeLiubkvJWQ0FS8/OnjvQMovE6u9cPCfeNdj3lI4U7vI7yjZeHuPhHOIVMxoFcyeJUxlXQKMpsJx6183nX3N+8mdvJBwflHSAGE/Cefwt3b9TCwPIXpboHcwr7L+Ykung3V+5YVxwmSZWedg==;31:xjB4+Vr72BCFkjReKyOoqgHP0XdbyNXcxQlzH6e3Roa7uFSdD/uVDGv5rFumlrawrm2GhmsQpb+rCi640Qh8rfH3k4OhRn1aNlLzK/spDaen5w9lR/SvvYm0lqRZCp3agTheN/YFYigKtBP7z8mXhDkvNFWxoBju7tGYvuQ3l+gs2Hx1MvmPk1kDMzASeIbsZjoZQ6s5KKz/5n0+NdVkG8JLyddX0gCBSNTyaRViL1Q=
X-MS-TrafficTypeDiagnostic: BN6PR12MB1300:
X-Microsoft-Exchange-Diagnostics: 1;BN6PR12MB1300;20: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;4:Tge36AH3Ae2xc/GgppWObM7G4AwdrXSnbUZAzMR9xtWzuIxwUVAeH8W0WUtDktFAkWbmqy/+8Xv/NAOd0kild3/Bb6RuH0mMXEGTDWnujGc7XE/+aWBzbxIwICHHVHa2Ox0qCmHTmrlLZYzBpVxR9CcShAP05G/bEkS4wgSWpG51ldqSsKarRBGxv5M9OO4CP3bwLo8ls2bcEH3+CklMHjKmrNHOtruz/efV50BsOCRRnZpb9IyfTjAJRU6JYhCLvBdAStJf1CcWXldPkLoffA==
X-Microsoft-Antispam-PRVS: <BN6PR12MB130046FFC238B2690164930C83110@BN6PR12MB1300.namprd12.prod.outlook.com>
X-Exchange-Antispam-Report-Test: UriScan:;
X-Exchange-Antispam-Report-CFA-Test: BCL:0;PCL:0;RULEID:(6040470)(2401047)(8121501046)(5005006)(93006095)(93001095)(10201501046)(3231023)(944501075)(3002001)(6055026)(6041268)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123558120)(20161123562045)(20161123560045)(20161123564045)(6072148)(201708071742011);SRVR:BN6PR12MB1300;BCL:0;PCL:0;RULEID:(100000803101)(100110400095);SRVR:BN6PR12MB1300;
X-Forefront-PRVS: 0548586081
X-Forefront-Antispam-Report: SFV:NSPM;SFS:(10009020)(39380400002)(376002)(346002)(396003)(39860400002)(366004)(189003)(199004)(93886005)(8936002)(39060400002)(81156014)(81166006)(7736002)(6246003)(8676002)(36756003)(386003)(58126008)(1706002)(54906003)(68736007)(59450400001)(2906002)(31696002)(25786009)(50466002)(4326008)(83506002)(316002)(6116002)(53936002)(52146003)(230700001)(105586002)(52116002)(23676004)(2486003)(76176011)(86362001)(67846002)(5660300001)(65826007)(478600001)(64126003)(6916009)(97736004)(52396003)(305945005)(72206003)(229853002)(47776003)(7416002)(6486002)(65806001)(2950100002)(6666003)(106356001)(65956001)(31686004);DIR:OUT;SFP:1101;SCL:1;SRVR:BN6PR12MB1300;H:[IPv6:2a02:908:1251:8fc0:4c6d:7233:b7e1:3b88];FPR:;SPF:None;PTR:InfoNoRecords;MX:1;A:1;LANG:en;
X-Microsoft-Exchange-Diagnostics: =?utf-8?B?MTtCTjZQUjEyTUIxMzAwOzIzOmxsNzBnbEVDcEtRWm1jMmNCZE5SNi9pbkJw?=
 =?utf-8?B?VmxEUTRLVzZSVGs1Q0hZdWZDTHFnQytOdzdQZjRPRlI5V3hOTEJnNFZ6bHVG?=
 =?utf-8?B?Q3o3QzAzKy9vRDBBTnRtTEJjK3o5YS9SVnZvS3B6MU00enF1V3ZOSlJSZXIz?=
 =?utf-8?B?WkU3ZHlabC93cUllNWlqblJsbWx0ak1ncGdhS1VhYVovSWc1R1FERlZwQUFy?=
 =?utf-8?B?azg3T2JOcEVTQkxyRlRmN0hpMTRQbG5uS3plTjYybHczVG9uRXR4ZmxPUWtC?=
 =?utf-8?B?QjllSUx6d28xQmgvVjJuS3hUam9uLzgrc0NBSVFOa0NKeVd4NmdpS1k3SDJl?=
 =?utf-8?B?ZlFGamwxNGxmYVp5MlBjbEtDTmdRUTdOSVRiRlFHdWhwQmtzekc2aUtVNUR0?=
 =?utf-8?B?ZkRDVHYyTTUwNFgyZU9yaDFsRjN1TFl6a05HVXNlSVFTc3cxL1F2V05mYnpU?=
 =?utf-8?B?WTdDd0orY2s4L0Y5R1JZeFBHemtRQ3FWWE9FaFdVZHdaWXFZZXZtWDJydHpp?=
 =?utf-8?B?NTdXZ2xjRWkvK29NZ21ucXhXTVpmUGlBNW9DQlNPSkVpcTJYVWdOVEJ5NytS?=
 =?utf-8?B?WGVnZTI1L0F4eVJHMkE2Nkh1UExQdkJzOXFlV3ZYZGowOWt1T3FMMVNyU3M5?=
 =?utf-8?B?VlVWcVg5dWduMjhaS25selZRdFBvTjFsUmlTZm1XSFA4VXhFNXVWbm5ZWmFw?=
 =?utf-8?B?U2lJcjEzMktBN0VQV1pFcEpSdTFtR2x3VjBvRkkvU0tGTHYzbS94UDZUY1FI?=
 =?utf-8?B?MW81VFRoQmlSREZvTTU5OGJJYW0zRWp3VlhMakhLL3QxVk1Bems1a1VteTJr?=
 =?utf-8?B?MDRWN25LVFZPUWVtcXlqQlFWa01kaU1iR2F2VDUxRXU5aklrZjRTbTRtL2F3?=
 =?utf-8?B?akdYOTFLSCtVZnlNT3gzT0F6ZXkrWGY1bktOVUFSU0xFM2o4SXlGVzdaSDVO?=
 =?utf-8?B?ZDRtQ21kR01va3R5dmtqcUtCQVJrdDBSVmRGaitXNmFrc3lzeGYrTXd3T3l0?=
 =?utf-8?B?ZEZLVnZ0ZmhIcFBYNWpqalY2MW9qMENoeWFvNCtZb1JjTG52ckNVMUJheFho?=
 =?utf-8?B?TjZYaThjNjQ1Zno1WVRLR1hwWm5VR3QrTVBlSFpUREwyd2psMEUwQWZ6RXFC?=
 =?utf-8?B?VitMWE1JWk1Ta0x1djFIdldtRFFiS0FPTlZkWjdBMVBtanBmNTlMd1FpSDhG?=
 =?utf-8?B?REFNVjJsNTc1WlE1RXBSWHpMbXNZM0Y4UzRhRFBSUm4xWFRkd1lDZFFUMXpY?=
 =?utf-8?B?czdteG03cmpqbUNQNTg4OExaRWFCYVhHVHM5MlFnQjkwbmNrL3greFZXRmUy?=
 =?utf-8?B?WDUvRG8rVHpBNWxBUWI0OHhsRzhUTlFkVkJNMFBwWmgyUGQrL0VBMFl0NDZw?=
 =?utf-8?B?Zm5LT294N0NuMUV6LytsbU5UMC9nMVRFaW5YSlNMOGF5WHdDbEN6Ymd3ME9n?=
 =?utf-8?B?WUV1cW9zajhkZUdoV2ZwUXVubUJzdVFKb1A0UkVkRTBvR0lTa3d0ZTZFaXRO?=
 =?utf-8?B?L2x3aWc5ZFR4WEVmS2x1c1ZOeDFwVkpYK0dweTNBcHN6QWloYmRxUVNKV2p3?=
 =?utf-8?B?bVNKd291ZHBhVkROZjdUcVAza3ZwYW5SY2x4ZVBEVjNYNkNreUxwZ3pxaTRn?=
 =?utf-8?B?ZkdUeWlvSkQrQUFWNFhaTndpaDlrRnpYS0ZFaG91K3VvTVFBVHRobXRLN1JI?=
 =?utf-8?B?d3dUWU85KzlacjkxYUtoVFV5dEVjVEo5M2s5bndDQVgwME5VaWY5QU9QSnJw?=
 =?utf-8?B?eUgxWm16bjlBemUwaVp3VEI0RTR4S09kSlNuS21CQ3d6cVJkZG5kWW5NNjRm?=
 =?utf-8?B?SmVxUGRPdmVYMUFTTVJGZmpGVnpoMmFsazhadC9mZXBqSDhmZll4Uzk4UzdS?=
 =?utf-8?Q?zMkhdxhZFoo=3D?=
X-Microsoft-Exchange-Diagnostics: 1;BN6PR12MB1300;6:F5Tr9bjkwwQW0US0T0UGvyIEQAb/D4yGKl3sBPe2I5U2Ua2P/EvtKCtu3RrQdnJyXj22RqlE1NqZ0IIEeT5kuQrt+9rS0tpj8lLprCSF0tM6r//FyHosJlDvcIFEo+FOvMGGKsnDzkB9Ge3bs0EeYHm1O8dvz2ZQ+tSBv9LNVoXEx+QHDSMO0ToltiL8tku5Tf41UvqStYMO1Bd1nHKAaQtVghHli8kg1UEeHCJVio1r8hrZQG12kWVl5Niia3eDggWHN6hihb3sfToFU02na996OrwmJ5VFnsTUHKz1mrsdh1TG3MuNfkXTmC+oYNutbcK1wciXCKBjliTtpOmPy3g9afQXvfKjFglzrgKEa3I=;5:kbwUVGg0Z//UP2nH65uXkX0QyMbMwjR+XRzTa9b8MZI41jYP7wTd6KFQOfb4Vu7wTNyvGHPz4rzWo0wCnVzdGWfu0TkpdL1PTUgrYeBvQZ8nnuUN253nsGaD2Z9cDblpZ6Mu9tGBE61AHUZxlcDVAqlUY+E/942aYthVFAhgvnM=;24:Kh+B+Uwzf2FCnnv0T7MqPmyViUsWTurshdcr7QE9Nogik6QYZdBU2v99Fs0Tly9bJegOcI6FKSj8wxG7Gai97oyDk2pH2MsgHKL+VU9LAPQ=;7:Iuw5m+gzqx38Jz6/LUF0df+2TVzI+cCQnJh9P1YiC3B2GuqVod2ObTGThiY6LEK6B46bpJ6dTEBEDewsUOZKU/dElzORUq9bgvuVHcSlXC04ioiwsaPjJmHYJcTe1BkV8He9WRlVsuFwsOCKtzAy1EruT5WhTXibYfzinRkvVqZKV3RNhAdDMLga8VTdYeYe9ML990udi8V1HeWep3IOJ3pTbjI1t9e4NKS2Hi2/1Y56bgjg0f6KK7lBMcWfu6Vz
SpamDiagnosticOutput: 1:99
SpamDiagnosticMetadata: NSPM
X-Microsoft-Exchange-Diagnostics: 1;BN6PR12MB1300;20:+82RUaJAHLAMUsR+32sa3pihZXKteAY7ueiWEp7x2pb97mVOxfs/byENdz2/qhpuZ/8zPbbJo85IYxTUB04r3EejHXpMqO9f8W2KAaVTdhBKls6iIbENix1Re+vtIXpVW//OUve0qP8y75IjVYNyHYKpX/rpwyasVjzSvqXU+L7Aw4/FRITyV+zt46BksNeTUM6XS3EzqELP47YWeVDFNsuTvlLebi62KdRoQf+o5lwEiwy4Bxwv8W5PEvM6ZmcR
X-OriginatorOrg: amd.com
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Jan 2018 12:29:35.6716 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: a872026a-7c14-4018-8443-08d55825d088
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR12MB1300
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Return-Path: <linux-kernel-owner@vger.kernel.org>

Am 09.01.2018 um 19:38 schrieb Bjorn Helgaas:
> I don't like to add new parameters because I think it's an
> unreasonable burden on users and it makes it hard for distros, but I
> understand the desire to use this functionality.  What would you think
> of adding a "pci=big_root_window" parameter that logs an info message
> and taints the kernel with TAINT_FIRMWARE_WORKAROUND?  Then there's at
> least some clue that we're in uncharted territory.

Done, patches for this are in your inbox.

Additionally to that I cleaned up the 256GB patch a bit more, e.g. added 
a comment where the 0xfd00000000 limit comes from and updated the commit 
message.

Please review and/or comment,
Christian.