Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752344AbbLDNva (ORCPT ); Fri, 4 Dec 2015 08:51:30 -0500 Received: from mail-by2on0061.outbound.protection.outlook.com ([207.46.100.61]:18717 "EHLO na01-by2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750829AbbLDNv3 (ORCPT ); Fri, 4 Dec 2015 08:51:29 -0500 From: "Wan, Vincent" To: Borislav Petkov , "Wang, Annie" CC: Vinod Koul , Mika Westerberg , Joerg Roedel , "Greg Kroah-Hartman" , "Rafael J. Wysocki" , "linux-acpi@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-serial@vger.kernel.org" , "dmaengine@vger.kernel.org" , "iommu@lists.linux-foundation.org" , "Huang, Ray" , "Xue, Ken" , "Li, Tony" Subject: RE: [PATCH 8/9] Documentation: Add ivrs_acpihid kernel parameter description Thread-Topic: [PATCH 8/9] Documentation: Add ivrs_acpihid kernel parameter description Thread-Index: AQHRLkOWNpX7O64LuEazTOofw5cyz566wCwAgAAOIQA= Date: Fri, 4 Dec 2015 13:19:35 +0000 Message-ID: References: <1449199466-6081-1-git-send-email-annie.wang@amd.com> <1449199466-6081-9-git-send-email-annie.wang@amd.com> <20151204122149.GD21177@pd.tnic> In-Reply-To: <20151204122149.GD21177@pd.tnic> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Vincent.Wan@amd.com; x-originating-ip: [210.13.97.168] x-microsoft-exchange-diagnostics: 1;BY2PR12MB0337;5:e3Pdj5jB4f9gfkZuDO+vLT985YmQiwELlBxFh7j6EHP3VvL03enRFjT1rX9oSyEd7IwlgDZZTizq2HauXNc62E/giC830JCIsNLPxS5IolpeANYZrsUOzfpUrKw7h7KgTrUyGqaqHjg4sb7iKgFZcg==;24:+pf8FTz7FQmBmLfJGtxNqYVTg+8dpNzoaMvjnX+gQxB8ZmuITvVyz+1WroOuuav/PR/XNT9wTPpLMw7tiDscoMbsV4w5dV5IKGiroLQmcKE=;20:1xU9UhGgSPLXYnPYk58S04fLz/WTtALF73bNyLgphiYVV9g/+7RlxQc3UlZKTG/3K7qt7J4WYJHacCkJlpaofzDE64niMIGykSKbD8XBRJowk+8WIkWs2D7RhgrhlR38fnR3fMKKbinBpBsGXPjSCaORI4iimCiRP8PXXFr7C2tAmSMWDnFhkmaIJAFuSAl6ra5eF7evyXcTBX4jenIg3wE4XWe/2+ULzCPJLeyRfpaHzAiq8OfVO1RcuqxzQl2k x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:BY2PR12MB0337; x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:; x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(601004)(2401047)(8121501046)(520078)(5005006)(10201501046)(3002001);SRVR:BY2PR12MB0337;BCL:0;PCL:0;RULEID:;SRVR:BY2PR12MB0337; x-forefront-prvs: 07807C55DC x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(6009001)(199003)(189002)(86362001)(99286002)(5003600100002)(87936001)(5004730100002)(102836003)(5001770100001)(5001960100002)(106356001)(66066001)(76576001)(101416001)(40100003)(1096002)(1220700001)(6116002)(5002640100001)(3846002)(81156007)(122556002)(106116001)(97736004)(92566002)(586003)(74316001)(54356999)(76176999)(33656002)(10400500002)(105586002)(77096005)(2950100001)(189998001)(2900100001)(50986999)(5008740100001);DIR:OUT;SFP:1101;SCL:1;SRVR:BY2PR12MB0337;H:DM3PR1201MB1023.namprd12.prod.outlook.com;FPR:;SPF:None;PTR:InfoNoRecords;A:1;MX:1;LANG:en; Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-originalarrivaltime: 04 Dec 2015 13:19:36.1936 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY2PR12MB0337 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id tB4Dpcol021907 Content-Length: 850 Lines: 20 > > + ivrs_acpihid [HW,X86_64] > > + Provide an override to the ACPI-HID:UID<->DEVICE-ID > > + mapping provided in the IVRS ACPI table. For > > + example, to map UART-HID:UID AMD0020:0 to > > + PCI device 00:14.5 write the parameter as: > > + ivrs_acpihid[00:14.5]=AMD0020:0 > > What is that parameter needed for? Can't you deduce the mapping from the > hardware? It is very like ivrs_ioapic/ ivrs_hpet, which can override the dedicated BDF id mapped to HID:UID that was reported from BIOS's IVHD entry. If BIOS did not report a right BDF, we can resort to this parameter to correct it. > > -- > Regards/Gruss, > Boris. > > ECO tip #101: Trim your mails when you reply. ????{.n?+???????+%?????ݶ??w??{.n?+????{??G?????{ay?ʇڙ?,j??f???h?????????z_??(?階?ݢj"???m??????G????????????&???~???iO???z??v?^?m???? ????????I?