From patchwork Thu Mar 17 16:25:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Michael Kelley (LINUX)" X-Patchwork-Id: 1606656 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=microsoft.com header.i=@microsoft.com header.a=rsa-sha256 header.s=selector2 header.b=Ox6SoDTR; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4KKCF03H5Bz9sBy for ; Fri, 18 Mar 2022 03:25:56 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236569AbiCQQ1J (ORCPT ); Thu, 17 Mar 2022 12:27:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40438 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236555AbiCQQ1I (ORCPT ); Thu, 17 Mar 2022 12:27:08 -0400 Received: from na01-obe.outbound.protection.outlook.com (mail-centralusazon11021024.outbound.protection.outlook.com [52.101.62.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1DAC3E09AA; Thu, 17 Mar 2022 09:25:46 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=EAmeEfozy1ICrxUzvNM1+D9t8rxdPI+QTazfes5mpWTuBnRHsl5nhzb3FbkzlBgH6b16HHWcjPpADRmCDPdWpi6kB5efpbdxX+6euT5rSA/8DcxrwTSpmZy21OW4wIkwk+mAauIAAotVrrWyi6FiL3/+etYKIL5RcvJbomsDgNwEQ2cGwuTRDhqFd1tkK2tWTsVkv9Y823LF0RFRa2c/fsO58YV2bJQ9xJ5l0nA6A/gG3XBvZkeb3jmdw8nkcGCAoDOVypPI7eiKxjYxGhGbEMCXjbpSrFB4P4yRvofq0ZJjDYTS2W2jFqH2s1qdz4l9O/Ec80pW9hBnlDgESGQ91A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=2yDLDyXVr4lWPvqstJjFwb/JQmGOxqMwR4p51AL2DjA=; b=JCEPgHJkxpVaKLCdLVHFBHWBModwZS5KxkoiA5bT6Df5/Kt7EhOHE3UeZheXUBT02BygFjNJEJ5XzE0r9WbBvF8WJRTIEie9YntIghkB3Mf9frdhFetOtNAXIl5qCuHx0pe6EUnU1Xfg3o6FocgtoOY2YF1Edcyjbh66CbCzckiL1c6P0gT2X8wfLb7oQGKnITZLl09zVMYyxlVAK19Cpf8eIOMfpZ8Qwd0Lks79U/gfANTIck+kBaXYCIgCI1St3WrR7Z8N6W/SDRUo4DKIkEVUq/o3nG/Ltlr+hHjck/iAlvQ+aq/Ld/Ei6hw19tESL+WGRXbtTeGfOyGQMYAjqA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=microsoft.com; dmarc=pass action=none header.from=microsoft.com; dkim=pass header.d=microsoft.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=2yDLDyXVr4lWPvqstJjFwb/JQmGOxqMwR4p51AL2DjA=; b=Ox6SoDTR6ZwroRn7UIOMjYKCETmwMeANcUdl7gOhAUTMEbf1BYhsRurRu+rDc811okNdBZVP5i5Nf8zKZGhQgigCVlA4qwbvNMOBXRduU6W8fvwpYvpAVzjaQ+WYn/uJuk9+9pFHJbx6a8yliLcy1XDToLONIUjXGsSJimRqtd4= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=microsoft.com; Received: from DM6PR21MB1514.namprd21.prod.outlook.com (2603:10b6:5:22d::11) by BL0PR2101MB1796.namprd21.prod.outlook.com (2603:10b6:207:19::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5102.7; Thu, 17 Mar 2022 16:25:44 +0000 Received: from DM6PR21MB1514.namprd21.prod.outlook.com ([fe80::8c81:f644:fc1c:1357]) by DM6PR21MB1514.namprd21.prod.outlook.com ([fe80::8c81:f644:fc1c:1357%4]) with mapi id 15.20.5102.007; Thu, 17 Mar 2022 16:25:44 +0000 From: Michael Kelley To: sthemmin@microsoft.com, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, rafael@kernel.org, lenb@kernel.org, lorenzo.pieralisi@arm.com, robh@kernel.org, kw@linux.com, bhelgaas@google.com, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, iommu@lists.linux-foundation.org Cc: mikelley@microsoft.com Subject: [PATCH 3/4 RESEND] Drivers: hv: vmbus: Propagate VMbus coherence to each VMbus device Date: Thu, 17 Mar 2022 09:25:10 -0700 Message-Id: <1647534311-2349-4-git-send-email-mikelley@microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1647534311-2349-1-git-send-email-mikelley@microsoft.com> References: <1647534311-2349-1-git-send-email-mikelley@microsoft.com> X-ClientProxiedBy: MW4P222CA0001.NAMP222.PROD.OUTLOOK.COM (2603:10b6:303:114::6) To DM6PR21MB1514.namprd21.prod.outlook.com (2603:10b6:5:22d::11) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 03e43920-5040-4f7f-f532-08da0832c933 X-MS-TrafficTypeDiagnostic: BL0PR2101MB1796:EE_ X-MS-Exchange-AtpMessageProperties: SA|SL X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DM6PR21MB1514.namprd21.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230001)(4636009)(366004)(451199009)(6666004)(4326008)(8676002)(7416002)(66476007)(66556008)(66946007)(6506007)(921005)(508600001)(82950400001)(10290500003)(82960400001)(52116002)(38350700002)(6486002)(38100700002)(8936002)(2906002)(83380400001)(107886003)(5660300002)(6512007)(86362001)(26005)(186003)(36756003)(316002)(2616005);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 03e43920-5040-4f7f-f532-08da0832c933 X-MS-Exchange-CrossTenant-AuthSource: DM6PR21MB1514.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Mar 2022 16:25:44.4708 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 9KsrKkWFiu3a4jdU8kI380/s4lM/vWB/mIUIp4aia9PJvtlZkBYeXmsM/RStytXY5VKtvgrImeqsB8MJsXiarQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR2101MB1796 X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org VMbus synthetic devices are not represented in the ACPI DSDT -- only the top level VMbus device is represented. As a result, on ARM64 coherence information in the _CCA method is not specified for synthetic devices, so they default to not hardware coherent. Drivers for some of these synthetic devices have been recently updated to use the standard DMA APIs, and they are incurring extra overhead of unneeded software coherence management. Fix this by propagating coherence information from the VMbus node in ACPI to the individual synthetic devices. There's no effect on x86/x64 where devices are always hardware coherent. Signed-off-by: Michael Kelley --- drivers/hv/vmbus_drv.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 12a2b37..c0e993ad 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -904,6 +904,21 @@ static int vmbus_probe(struct device *child_device) drv_to_hv_drv(child_device->driver); struct hv_device *dev = device_to_hv_device(child_device); const struct hv_vmbus_device_id *dev_id; + enum dev_dma_attr coherent; + + /* + * On ARM64, propagate the DMA coherence setting from the top level + * VMbus ACPI device to the child VMbus device being added here. + * Older Hyper-V ARM64 versions don't set the _CCA method on the + * top level VMbus ACPI device as they should. Treat these cases + * as DMA coherent since that's the assumption made by Hyper-V. + * + * On x86/x64 these calls assume coherence and have no effect. + */ + coherent = acpi_get_dma_attr(hv_acpi_dev); + if (coherent == DEV_DMA_NOT_SUPPORTED) + coherent = DEV_DMA_COHERENT; + acpi_dma_configure(child_device, coherent); dev_id = hv_vmbus_get_id(drv, dev); if (drv->probe) {