From patchwork Sun Jul 22 06:09:24 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baolu Lu X-Patchwork-Id: 10539189 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8304414BC for ; Sun, 22 Jul 2018 06:12:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 72B722785D for ; Sun, 22 Jul 2018 06:12:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 674612793A; Sun, 22 Jul 2018 06:12:18 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham 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 027952785D for ; Sun, 22 Jul 2018 06:12:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728152AbeGVHGn (ORCPT ); Sun, 22 Jul 2018 03:06:43 -0400 Received: from mga02.intel.com ([134.134.136.20]:8994 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727768AbeGVHGm (ORCPT ); Sun, 22 Jul 2018 03:06:42 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 Jul 2018 23:11:12 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,388,1526367600"; d="scan'208";a="218015809" Received: from allen-box.sh.intel.com ([10.239.48.172]) by orsmga004.jf.intel.com with ESMTP; 21 Jul 2018 23:11:08 -0700 From: Lu Baolu To: Joerg Roedel , David Woodhouse , Alex Williamson , Kirti Wankhede Cc: ashok.raj@intel.com, sanjay.k.kumar@intel.com, jacob.jun.pan@intel.com, kevin.tian@intel.com, yi.l.liu@intel.com, yi.y.sun@intel.com, peterx@redhat.com, iommu@lists.linux-foundation.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Lu Baolu , Jacob Pan Subject: [RFC PATCH 01/10] iommu/vt-d: Get iommu device for a mediated device Date: Sun, 22 Jul 2018 14:09:24 +0800 Message-Id: <1532239773-15325-2-git-send-email-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1532239773-15325-1-git-send-email-baolu.lu@linux.intel.com> References: <1532239773-15325-1-git-send-email-baolu.lu@linux.intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds the support to get the iommu device for a mediated device. The assumption is that each mediated device is a minimal assignable set of a physical PCI device. Hence, we should use the iommu device of the parent PCI device to manage the translation. Cc: Ashok Raj Cc: Jacob Pan Cc: Kevin Tian Cc: Liu Yi L Signed-off-by: Sanjay Kumar Signed-off-by: Lu Baolu --- drivers/iommu/intel-iommu.c | 6 ++++++ drivers/iommu/intel-pasid.h | 16 ++++++++++++++++ 2 files changed, 22 insertions(+) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 7d198ea..fc3ac1c 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -767,6 +767,12 @@ static struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devf if (iommu_dummy(dev)) return NULL; + if (dev_is_mdev(dev)) { + dev = dev_mdev_parent(dev); + if (WARN_ON(!dev_is_pci(dev))) + return NULL; + } + if (dev_is_pci(dev)) { struct pci_dev *pf_pdev; diff --git a/drivers/iommu/intel-pasid.h b/drivers/iommu/intel-pasid.h index 518df72..46cde66 100644 --- a/drivers/iommu/intel-pasid.h +++ b/drivers/iommu/intel-pasid.h @@ -35,6 +35,22 @@ struct pasid_table { struct list_head dev; /* device list */ }; +static inline bool dev_is_mdev(struct device *dev) +{ + if (!dev) + return false; + + return !strcmp(dev->bus->name, "mdev"); +} + +static inline struct device *dev_mdev_parent(struct device *dev) +{ + if (WARN_ON(!dev_is_mdev(dev))) + return NULL; + + return dev->parent; +} + extern u32 intel_pasid_max_id; int intel_pasid_alloc_id(void *ptr, int start, int end, gfp_t gfp); void intel_pasid_free_id(int pasid);