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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 582C5C433B4 for ; Mon, 10 May 2021 14:27:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2A94961260 for ; Mon, 10 May 2021 14:27:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230163AbhEJO2P (ORCPT ); Mon, 10 May 2021 10:28:15 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:2676 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235354AbhEJOXq (ORCPT ); Mon, 10 May 2021 10:23:46 -0400 Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4Ff39B4WTgz1BKvs; Mon, 10 May 2021 22:19:58 +0800 (CST) Received: from localhost.localdomain (10.69.192.58) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.498.0; Mon, 10 May 2021 22:22:26 +0800 From: John Garry To: , , , , CC: , , , , , , John Garry Subject: [PATCH v2 07/15] iommu: Add iommu_realloc_dev_group() Date: Mon, 10 May 2021 22:17:21 +0800 Message-ID: <1620656249-68890-8-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1620656249-68890-1-git-send-email-john.garry@huawei.com> References: <1620656249-68890-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.69.192.58] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a function to re-alloc IOMMU group default domain. Signed-off-by: John Garry --- drivers/iommu/iommu.c | 12 ++++++++++++ include/linux/iommu.h | 6 ++++++ 2 files changed, 18 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index f7253a973ab9..bdb9aa47dfca 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -3191,6 +3191,18 @@ static int iommu_change_dev_def_domain(struct iommu_group *group, return ret; } +int iommu_realloc_dev_group(struct device *dev) +{ + struct iommu_group *group; + int ret; + + group = iommu_group_get(dev); + ret = iommu_change_dev_def_domain(group, dev, 0, true); + iommu_group_put(group); + + return ret; +} + /* * Changing the default domain or any other IOMMU group attribute through sysfs * requires the users to unbind the drivers from the devices in the IOMMU group. diff --git a/include/linux/iommu.h b/include/linux/iommu.h index e26abda94792..6e187746af0f 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -482,6 +482,7 @@ bool iommu_get_dma_strict(struct iommu_domain *domain); extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev, unsigned long iova, int flags); +extern int iommu_realloc_dev_group(struct device *dev); static inline void iommu_flush_iotlb_all(struct iommu_domain *domain) { @@ -699,6 +700,11 @@ static inline size_t iommu_map_sg_atomic(struct iommu_domain *domain, return 0; } +static inline int iommu_realloc_dev_group(struct device *dev) +{ + return -ENODEV; +} + static inline void iommu_flush_iotlb_all(struct iommu_domain *domain) { } -- 2.26.2