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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 864C1C28CBF for ; Sun, 26 May 2019 16:10:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 68ACC2085A for ; Sun, 26 May 2019 16:10:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727966AbfEZQKW (ORCPT ); Sun, 26 May 2019 12:10:22 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38004 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727950AbfEZQKV (ORCPT ); Sun, 26 May 2019 12:10:21 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 1670A368FF; Sun, 26 May 2019 16:10:21 +0000 (UTC) Received: from laptop.redhat.com (ovpn-116-67.ams2.redhat.com [10.36.116.67]) by smtp.corp.redhat.com (Postfix) with ESMTP id 29F905DD81; Sun, 26 May 2019 16:10:16 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, joro@8bytes.org, alex.williamson@redhat.com, jacob.jun.pan@linux.intel.com, yi.l.liu@intel.com, jean-philippe.brucker@arm.com, will.deacon@arm.com, robin.murphy@arm.com Cc: kevin.tian@intel.com, ashok.raj@intel.com, marc.zyngier@arm.com, peter.maydell@linaro.org, vincent.stehle@arm.com Subject: [PATCH v8 01/29] driver core: Add per device iommu param Date: Sun, 26 May 2019 18:09:36 +0200 Message-Id: <20190526161004.25232-2-eric.auger@redhat.com> In-Reply-To: <20190526161004.25232-1-eric.auger@redhat.com> References: <20190526161004.25232-1-eric.auger@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Sun, 26 May 2019 16:10:21 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jacob Pan DMA faults can be detected by IOMMU at device level. Adding a pointer to struct device allows IOMMU subsystem to report relevant faults back to the device driver for further handling. For direct assigned device (or user space drivers), guest OS holds responsibility to handle and respond per device IOMMU fault. Therefore we need fault reporting mechanism to propagate faults beyond IOMMU subsystem. There are two other IOMMU data pointers under struct device today, here we introduce iommu_param as a parent pointer such that all device IOMMU data can be consolidated here. The idea was suggested here by Greg KH and Joerg. The name iommu_param is chosen here since iommu_data has been used. Suggested-by: Greg Kroah-Hartman Reviewed-by: Greg Kroah-Hartman Signed-off-by: Jacob Pan Link: https://lkml.org/lkml/2017/10/6/81 --- include/linux/device.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/linux/device.h b/include/linux/device.h index e85264fb6616..f0a975abd6e9 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -42,6 +42,7 @@ struct iommu_ops; struct iommu_group; struct iommu_fwspec; struct dev_pin_info; +struct iommu_param; struct bus_attribute { struct attribute attr; @@ -959,6 +960,7 @@ struct dev_links_info { * device (i.e. the bus driver that discovered the device). * @iommu_group: IOMMU group the device belongs to. * @iommu_fwspec: IOMMU-specific properties supplied by firmware. + * @iommu_param: Per device generic IOMMU runtime data * * @offline_disabled: If set, the device is permanently online. * @offline: Set after successful invocation of bus type's .offline(). @@ -1052,6 +1054,7 @@ struct device { void (*release)(struct device *dev); struct iommu_group *iommu_group; struct iommu_fwspec *iommu_fwspec; + struct iommu_param *iommu_param; bool offline_disabled:1; bool offline:1; -- 2.20.1