From patchwork Wed Oct 26 21:29:15 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kirti Wankhede X-Patchwork-Id: 9398383 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 30D11600BA for ; Wed, 26 Oct 2016 21:29:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EE87E29AD8 for ; Wed, 26 Oct 2016 21:29:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E379C29E1B; Wed, 26 Oct 2016 21:29:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 75A8329AD8 for ; Wed, 26 Oct 2016 21:29:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S938807AbcJZV3I (ORCPT ); Wed, 26 Oct 2016 17:29:08 -0400 Received: from hqemgate15.nvidia.com ([216.228.121.64]:3856 "EHLO hqemgate15.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936365AbcJZV3G (ORCPT ); Wed, 26 Oct 2016 17:29:06 -0400 Received: from hqnvupgp08.nvidia.com (Not Verified[216.228.121.13]) by hqemgate15.nvidia.com id ; Wed, 26 Oct 2016 14:28:41 -0700 Received: from HQMAIL101.nvidia.com ([172.20.13.39]) by hqnvupgp08.nvidia.com (PGP Universal service); Wed, 26 Oct 2016 14:29:04 -0700 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Wed, 26 Oct 2016 14:29:04 -0700 Received: from HQMAIL105.nvidia.com (172.20.187.12) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1210.3; Wed, 26 Oct 2016 21:29:04 +0000 Received: from kwankhede-dev.nvidia.com (172.20.13.39) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1210.3 via Frontend Transport; Wed, 26 Oct 2016 21:29:01 +0000 From: Kirti Wankhede To: , , , CC: , , , , , , Kirti Wankhede Subject: [PATCH v10 08/19] vfio iommu type1: Add find_iommu_group() function Date: Thu, 27 Oct 2016 02:59:15 +0530 Message-ID: <1477517366-27871-9-git-send-email-kwankhede@nvidia.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1477517366-27871-1-git-send-email-kwankhede@nvidia.com> References: <1477517366-27871-1-git-send-email-kwankhede@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add find_iommu_group() Signed-off-by: Kirti Wankhede Signed-off-by: Neo Jia Change-Id: I9d372f1ebe9eb01a5a21374b8a2b03f7df73601f Reviewed-by: Jike Song --- drivers/vfio/vfio_iommu_type1.c | 58 ++++++++++++++++++++++++----------------- 1 file changed, 34 insertions(+), 24 deletions(-) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 3d916b965492..861ac2a1b0c3 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -745,11 +745,24 @@ static void vfio_test_domain_fgsp(struct vfio_domain *domain) __free_pages(pages, order); } +static struct vfio_group *find_iommu_group(struct vfio_domain *domain, + struct iommu_group *iommu_group) +{ + struct vfio_group *g; + + list_for_each_entry(g, &domain->group_list, next) { + if (g->iommu_group == iommu_group) + return g; + } + + return NULL; +} + static int vfio_iommu_type1_attach_group(void *iommu_data, struct iommu_group *iommu_group) { struct vfio_iommu *iommu = iommu_data; - struct vfio_group *group, *g; + struct vfio_group *group; struct vfio_domain *domain, *d; struct bus_type *bus = NULL; int ret; @@ -757,10 +770,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data, mutex_lock(&iommu->lock); list_for_each_entry(d, &iommu->domain_list, next) { - list_for_each_entry(g, &d->group_list, next) { - if (g->iommu_group != iommu_group) - continue; - + if (find_iommu_group(d, iommu_group)) { mutex_unlock(&iommu->lock); return -EINVAL; } @@ -879,28 +889,28 @@ static void vfio_iommu_type1_detach_group(void *iommu_data, mutex_lock(&iommu->lock); + list_for_each_entry(domain, &iommu->domain_list, next) { - list_for_each_entry(group, &domain->group_list, next) { - if (group->iommu_group != iommu_group) - continue; + group = find_iommu_group(domain, iommu_group); + if (!group) + continue; - iommu_detach_group(domain->domain, iommu_group); - list_del(&group->next); - kfree(group); - /* - * Group ownership provides privilege, if the group - * list is empty, the domain goes away. If it's the - * last domain, then all the mappings go away too. - */ - if (list_empty(&domain->group_list)) { - if (list_is_singular(&iommu->domain_list)) - vfio_iommu_unmap_unpin_all(iommu); - iommu_domain_free(domain->domain); - list_del(&domain->next); - kfree(domain); - } - goto done; + iommu_detach_group(domain->domain, iommu_group); + list_del(&group->next); + kfree(group); + /* + * Group ownership provides privilege, if the group + * list is empty, the domain goes away. If it's the + * last domain, then all the mappings go away too. + */ + if (list_empty(&domain->group_list)) { + if (list_is_singular(&iommu->domain_list)) + vfio_iommu_unmap_unpin_all(iommu); + iommu_domain_free(domain->domain); + list_del(&domain->next); + kfree(domain); } + goto done; } done: