From patchwork Tue Apr 21 23:34:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 11502475 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 573556CA for ; Tue, 21 Apr 2020 23:34:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4885420679 for ; Tue, 21 Apr 2020 23:34:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726543AbgDUXej (ORCPT ); Tue, 21 Apr 2020 19:34:39 -0400 Received: from mga01.intel.com ([192.55.52.88]:36898 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726545AbgDUXei (ORCPT ); Tue, 21 Apr 2020 19:34:38 -0400 IronPort-SDR: gUohqOewZhV6j32SsuJNR+vY/NUQxWRteTj4YJVdOFT8s+cz41NbnuullmMTP/2iPQjQxRmk38 rTgbWLIiIuzA== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Apr 2020 16:34:37 -0700 IronPort-SDR: ZYAjYixMVxHs0BuS7CR9a768GC36QrbGrfIo3IG6FMmvuu65RRToBv/27KZP8lrFfysWeYugkb CvrCRBIVIeUQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.72,411,1580803200"; d="scan'208";a="258876497" Received: from djiang5-desk3.ch.intel.com ([143.182.136.137]) by orsmga006.jf.intel.com with ESMTP; 21 Apr 2020 16:34:36 -0700 Subject: [PATCH RFC 08/15] vfio/mdev: Add a member for iommu domain in mdev_device From: Dave Jiang To: vkoul@kernel.org, megha.dey@linux.intel.com, maz@kernel.org, bhelgaas@google.com, rafael@kernel.org, gregkh@linuxfoundation.org, tglx@linutronix.de, hpa@zytor.com, alex.williamson@redhat.com, jacob.jun.pan@intel.com, ashok.raj@intel.com, jgg@mellanox.com, yi.l.liu@intel.com, baolu.lu@intel.com, kevin.tian@intel.com, sanjay.k.kumar@intel.com, tony.luck@intel.com, jing.lin@intel.com, dan.j.williams@intel.com, kwankhede@nvidia.com, eric.auger@redhat.com, parav@mellanox.com Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org Date: Tue, 21 Apr 2020 16:34:36 -0700 Message-ID: <158751207630.36773.14545210630713509626.stgit@djiang5-desk3.ch.intel.com> In-Reply-To: <158751095889.36773.6009825070990637468.stgit@djiang5-desk3.ch.intel.com> References: <158751095889.36773.6009825070990637468.stgit@djiang5-desk3.ch.intel.com> User-Agent: StGit/unknown-version MIME-Version: 1.0 Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org From: Lu Baolu This adds a member to save iommu domain in mdev_device structure. Whenever an iommu domain is attached to the mediated device, it must be save here so that a VDCM (Virtual Device Control Module) could retreive it. Below member is added in struct mdev_device: * iommu_domain - A place to save the iommu domain attached to this mdev. Below helpers are added to set and get iommu domain in struct mdev_device. * mdev_set/get_iommu_domain(domain) - A iommu domain which has been attached to the iommu device in order to protect and isolate the mediated device will be kept in the mdev data structure and could be retrieved later. Cc: Ashok Raj Cc: Jacob Pan Cc: Kevin Tian Cc: Liu Yi L Suggested-by: Kevin Tian Signed-off-by: Lu Baolu --- drivers/vfio/mdev/mdev_core.c | 16 ++++++++++++++++ drivers/vfio/mdev/mdev_private.h | 1 + include/linux/mdev.h | 10 ++++++++++ 3 files changed, 27 insertions(+) diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c index cecc6a6bdbef..15863cf83f3f 100644 --- a/drivers/vfio/mdev/mdev_core.c +++ b/drivers/vfio/mdev/mdev_core.c @@ -410,6 +410,22 @@ struct device *mdev_get_iommu_device(struct device *dev) } EXPORT_SYMBOL(mdev_get_iommu_device); +void mdev_set_iommu_domain(struct device *dev, void *domain) +{ + struct mdev_device *mdev = to_mdev_device(dev); + + mdev->iommu_domain = domain; +} +EXPORT_SYMBOL(mdev_set_iommu_domain); + +void *mdev_get_iommu_domain(struct device *dev) +{ + struct mdev_device *mdev = to_mdev_device(dev); + + return mdev->iommu_domain; +} +EXPORT_SYMBOL(mdev_get_iommu_domain); + static int __init mdev_init(void) { return mdev_bus_register(); diff --git a/drivers/vfio/mdev/mdev_private.h b/drivers/vfio/mdev/mdev_private.h index c21f1305a76b..c97478b22a02 100644 --- a/drivers/vfio/mdev/mdev_private.h +++ b/drivers/vfio/mdev/mdev_private.h @@ -32,6 +32,7 @@ struct mdev_device { struct list_head next; struct kobject *type_kobj; struct device *iommu_device; + void *iommu_domain; bool active; }; diff --git a/include/linux/mdev.h b/include/linux/mdev.h index fa2344e239ef..0d66daaecc67 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -26,6 +26,16 @@ int mdev_set_iommu_device(struct device *dev, struct device *iommu_device); struct device *mdev_get_iommu_device(struct device *dev); +/* + * Called by vfio iommu modules to save the iommu domain after a domain being + * attached to the mediated device. The vDCM (virtual device control module) + * could call mdev_get_iommu_domain() to retrieve an auxiliary domain attached + * to an mdev. + */ +void mdev_set_iommu_domain(struct device *dev, void *domain); + +void *mdev_get_iommu_domain(struct device *dev); + /** * struct mdev_parent_ops - Structure to be registered for each parent device to * register the device to mdev module.