From patchwork Mon Sep 13 07:16:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12488021 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=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 C5868C433EF for ; Mon, 13 Sep 2021 07:28:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A0D2E604DA for ; Mon, 13 Sep 2021 07:28:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237568AbhIMH3q (ORCPT ); Mon, 13 Sep 2021 03:29:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33106 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235199AbhIMH3q (ORCPT ); Mon, 13 Sep 2021 03:29:46 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F3DF7C061574 for ; Mon, 13 Sep 2021 00:28:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=1cJSkAOLkZc3HmPaqLux3lj0GY7UwpyYq0e4YxDywJM=; b=TxVfXXXTTfBo/8QAHzdyJ1sUSg hy4GDXH4ddQXXgeFtZ3y6lMz9uQmKx+P92vKbe/bpFeRtJ2sEZg/WJjP0DZbz1NJwoCJ5Us7yUDX9 u18whHchC5Uze3ZSj3/GkZ5xf4zWT1EPygmPrGbi8G48JIw/vuU7DGvibsU1pfWFG2AmEJnqBGFbr j8K1g/JKxrJxYSKqZPd7d8UHT1xnJ+8+l9wWl3lpAFW9rAth0zAwZzPbS6C5+W093lPweb9tSBA2k YO0Q93N4C9++xkFUCZnaKRVAuDjWHyD8PppOG5SF1khAMQgdgL4gZYrgy6dFPj6YjK8aTgcSJw8XM w3IGMJvA==; Received: from 213-225-6-64.nat.highway.a1.net ([213.225.6.64] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mPgM8-00DGfH-Nb; Mon, 13 Sep 2021 07:26:37 +0000 From: Christoph Hellwig To: Alex Williamson Cc: Diana Craciun , Cornelia Huck , Kirti Wankhede , Eric Auger , Jason Gunthorpe , Terrence Xu , kvm@vger.kernel.org, Jason Gunthorpe , Kevin Tian Subject: [PATCH 10/14] vfio: remove the unused mdev iommu hook Date: Mon, 13 Sep 2021 09:16:02 +0200 Message-Id: <20210913071606.2966-11-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210913071606.2966-1-hch@lst.de> References: <20210913071606.2966-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org The iommu_device field in struct mdev_device has never been used since it was added more than 2 years ago. This is a manual revert of commit 7bd50f0cd2 ("vfio/type1: Add domain at(de)taching group helpers"). Signed-off-by: Christoph Hellwig Reviewed-by: Jason Gunthorpe Reviewed-by: Kevin Tian --- drivers/vfio/vfio_iommu_type1.c | 133 +++++++------------------------- include/linux/mdev.h | 20 ----- 2 files changed, 26 insertions(+), 127 deletions(-) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 2e51e4390c1531..42a6be1fb7265e 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -114,7 +114,6 @@ struct vfio_batch { struct vfio_iommu_group { struct iommu_group *iommu_group; struct list_head next; - bool mdev_group; /* An mdev group */ bool pinned_page_dirty_scope; }; @@ -1935,61 +1934,6 @@ static bool vfio_iommu_has_sw_msi(struct list_head *group_resv_regions, return ret; } -static int vfio_mdev_attach_domain(struct device *dev, void *data) -{ - struct mdev_device *mdev = to_mdev_device(dev); - struct iommu_domain *domain = data; - struct device *iommu_device; - - iommu_device = mdev_get_iommu_device(mdev); - if (iommu_device) { - if (iommu_dev_feature_enabled(iommu_device, IOMMU_DEV_FEAT_AUX)) - return iommu_aux_attach_device(domain, iommu_device); - else - return iommu_attach_device(domain, iommu_device); - } - - return -EINVAL; -} - -static int vfio_mdev_detach_domain(struct device *dev, void *data) -{ - struct mdev_device *mdev = to_mdev_device(dev); - struct iommu_domain *domain = data; - struct device *iommu_device; - - iommu_device = mdev_get_iommu_device(mdev); - if (iommu_device) { - if (iommu_dev_feature_enabled(iommu_device, IOMMU_DEV_FEAT_AUX)) - iommu_aux_detach_device(domain, iommu_device); - else - iommu_detach_device(domain, iommu_device); - } - - return 0; -} - -static int vfio_iommu_attach_group(struct vfio_domain *domain, - struct vfio_iommu_group *group) -{ - if (group->mdev_group) - return iommu_group_for_each_dev(group->iommu_group, - domain->domain, - vfio_mdev_attach_domain); - else - return iommu_attach_group(domain->domain, group->iommu_group); -} - -static void vfio_iommu_detach_group(struct vfio_domain *domain, - struct vfio_iommu_group *group) -{ - if (group->mdev_group) - iommu_group_for_each_dev(group->iommu_group, domain->domain, - vfio_mdev_detach_domain); - else - iommu_detach_group(domain->domain, group->iommu_group); -} - static bool vfio_bus_is_mdev(struct bus_type *bus) { struct bus_type *mdev_bus; @@ -2004,20 +1948,6 @@ static bool vfio_bus_is_mdev(struct bus_type *bus) return ret; } -static int vfio_mdev_iommu_device(struct device *dev, void *data) -{ - struct mdev_device *mdev = to_mdev_device(dev); - struct device **old = data, *new; - - new = mdev_get_iommu_device(mdev); - if (!new || (*old && *old != new)) - return -EINVAL; - - *old = new; - - return 0; -} - /* * This is a helper function to insert an address range to iova list. * The list is initially created with a single entry corresponding to @@ -2278,38 +2208,25 @@ static int vfio_iommu_type1_attach_group(void *iommu_data, goto out_free; if (vfio_bus_is_mdev(bus)) { - struct device *iommu_device = NULL; - - group->mdev_group = true; - - /* Determine the isolation type */ - ret = iommu_group_for_each_dev(iommu_group, &iommu_device, - vfio_mdev_iommu_device); - if (ret || !iommu_device) { - if (!iommu->external_domain) { - INIT_LIST_HEAD(&domain->group_list); - iommu->external_domain = domain; - vfio_update_pgsize_bitmap(iommu); - } else { - kfree(domain); - } - - list_add(&group->next, - &iommu->external_domain->group_list); - /* - * Non-iommu backed group cannot dirty memory directly, - * it can only use interfaces that provide dirty - * tracking. - * The iommu scope can only be promoted with the - * addition of a dirty tracking group. - */ - group->pinned_page_dirty_scope = true; - mutex_unlock(&iommu->lock); - - return 0; + if (!iommu->external_domain) { + INIT_LIST_HEAD(&domain->group_list); + iommu->external_domain = domain; + vfio_update_pgsize_bitmap(iommu); + } else { + kfree(domain); } - bus = iommu_device->bus; + list_add(&group->next, &iommu->external_domain->group_list); + /* + * Non-iommu backed group cannot dirty memory directly, it can + * only use interfaces that provide dirty tracking. + * The iommu scope can only be promoted with the addition of a + * dirty tracking group. + */ + group->pinned_page_dirty_scope = true; + mutex_unlock(&iommu->lock); + + return 0; } domain->domain = iommu_domain_alloc(bus); @@ -2324,7 +2241,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data, goto out_domain; } - ret = vfio_iommu_attach_group(domain, group); + ret = iommu_attach_group(domain->domain, group->iommu_group); if (ret) goto out_domain; @@ -2391,15 +2308,17 @@ static int vfio_iommu_type1_attach_group(void *iommu_data, list_for_each_entry(d, &iommu->domain_list, next) { if (d->domain->ops == domain->domain->ops && d->prot == domain->prot) { - vfio_iommu_detach_group(domain, group); - if (!vfio_iommu_attach_group(d, group)) { + iommu_detach_group(domain->domain, group->iommu_group); + if (!iommu_attach_group(d->domain, + group->iommu_group)) { list_add(&group->next, &d->group_list); iommu_domain_free(domain->domain); kfree(domain); goto done; } - ret = vfio_iommu_attach_group(domain, group); + ret = iommu_attach_group(domain->domain, + group->iommu_group); if (ret) goto out_domain; } @@ -2436,7 +2355,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data, return 0; out_detach: - vfio_iommu_detach_group(domain, group); + iommu_detach_group(domain->domain, group->iommu_group); out_domain: iommu_domain_free(domain->domain); vfio_iommu_iova_free(&iova_copy); @@ -2601,7 +2520,7 @@ static void vfio_iommu_type1_detach_group(void *iommu_data, if (!group) continue; - vfio_iommu_detach_group(domain, group); + iommu_detach_group(domain->domain, group->iommu_group); update_dirty_scope = !group->pinned_page_dirty_scope; list_del(&group->next); kfree(group); @@ -2689,7 +2608,7 @@ static void vfio_release_domain(struct vfio_domain *domain, bool external) list_for_each_entry_safe(group, group_tmp, &domain->group_list, next) { if (!external) - vfio_iommu_detach_group(domain, group); + iommu_detach_group(domain->domain, group->iommu_group); list_del(&group->next); kfree(group); } diff --git a/include/linux/mdev.h b/include/linux/mdev.h index 68427e8fadebd6..15d03f6532d073 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -18,7 +18,6 @@ struct mdev_device { void *driver_data; struct list_head next; struct mdev_type *type; - struct device *iommu_device; bool active; }; @@ -27,25 +26,6 @@ static inline struct mdev_device *to_mdev_device(struct device *dev) return container_of(dev, struct mdev_device, dev); } -/* - * Called by the parent device driver to set the device which represents - * this mdev in iommu protection scope. By default, the iommu device is - * NULL, that indicates using vendor defined isolation. - * - * @dev: the mediated device that iommu will isolate. - * @iommu_device: a pci device which represents the iommu for @dev. - */ -static inline void mdev_set_iommu_device(struct mdev_device *mdev, - struct device *iommu_device) -{ - mdev->iommu_device = iommu_device; -} - -static inline struct device *mdev_get_iommu_device(struct mdev_device *mdev) -{ - return mdev->iommu_device; -} - unsigned int mdev_get_type_group_id(struct mdev_device *mdev); unsigned int mtype_get_type_group_id(struct mdev_type *mtype); struct device *mtype_get_parent_dev(struct mdev_type *mtype);