From patchwork Sat Jun 8 13:21:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 10983695 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 CA88614B6 for ; Sun, 9 Jun 2019 13:38:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BA0D528739 for ; Sun, 9 Jun 2019 13:38:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AE54D289AB; Sun, 9 Jun 2019 13:38:47 +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=-6.6 required=2.0 tests=BAYES_00,DATE_IN_PAST_24_48, 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 3EF9828739 for ; Sun, 9 Jun 2019 13:38:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728663AbfFINhx (ORCPT ); Sun, 9 Jun 2019 09:37:53 -0400 Received: from mga03.intel.com ([134.134.136.65]:25056 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727382AbfFINhx (ORCPT ); Sun, 9 Jun 2019 09:37:53 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 09 Jun 2019 06:37:52 -0700 X-ExtLoop1: 1 Received: from yiliu-dev.bj.intel.com ([10.238.156.125]) by fmsmga007.fm.intel.com with ESMTP; 09 Jun 2019 06:37:50 -0700 From: Liu Yi L To: alex.williamson@redhat.com, kwankhede@nvidia.com Cc: kevin.tian@intel.com, baolu.lu@linux.intel.com, yi.l.liu@intel.com, yi.y.sun@intel.com, joro@8bytes.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Subject: [PATCH v1 0/9] vfio_pci: wrap pci device as a mediated device Date: Sat, 8 Jun 2019 21:21:02 +0800 Message-Id: <1560000071-3543-1-git-send-email-yi.l.liu@intel.com> X-Mailer: git-send-email 2.7.4 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patchset aims to add a vfio-pci-like meta driver as a demo user of the vfio changes introduced in "vfio/mdev: IOMMU aware mediated device" patchset from Baolu Lu. Besides the test purpose, per Alex's comments, it could also be a good base driver for experimenting with device specific mdev migration. Specific interface tested in this proposal: *) int mdev_set_iommu_device(struct device *dev, struct device *iommu_device) introduced in the patch as below: "[PATCH v5 6/8] vfio/mdev: Add iommu related member in mdev_device" Patch Overview: *) patch 1 ~ 7: code refactor for existing vfio-pci module move the common codes from vfio_pci.c to vfio_pci_common.c *) patch 8: add protection to perm_bits alloc/free *) patch 9: add vfio-mdev-pci sample driver Links: *) Link of "vfio/mdev: IOMMU aware mediated device" https://lwn.net/Articles/780522/ *) Previous versions: RFC v1: https://lkml.org/lkml/2019/3/4/529 RFC v2: https://lkml.org/lkml/2019/3/13/113 RFC v3: https://lkml.org/lkml/2019/4/24/495 *) may try it with the codes in below repo current version is branch "v5.2-rc3-pci-mdev": https://github.com/luxis1999/vfio-mdev-pci-sample-driver.git Please feel free give your comments. Thanks, Yi Liu Change log: RFC v3 -> patch v1: - split the patchset from 3 patches to 9 patches to better demonstrate the changes step by step v2->v3: - use vfio-mdev-pci instead of vfio-pci-mdev - place the new driver under drivers/vfio/pci while define Kconfig in samples/Kconfig to clarify it is a sample driver v1->v2: - instead of adding kernel option to existing vfio-pci module in v1, v2 follows Alex's suggestion to add a separate vfio-pci-mdev module. - new patchset subject: "vfio/pci: wrap pci device as a mediated device" Liu Yi L (9): vfio_pci: move vfio_pci_is_vga/vfio_vga_disabled to header vfio_pci: refine user config reference in vfio-pci module vfio_pci: refine vfio_pci_driver reference in vfio_pci.c vfio_pci: make common functions be extern vfio_pci: duplicate vfio_pci.c vfio_pci: shrink vfio_pci_common.c vfio_pci: shrink vfio_pci.c vfio/pci: protect cap/ecap_perm bits alloc/free with atomic op smaples: add vfio-mdev-pci driver drivers/vfio/pci/Makefile | 9 +- drivers/vfio/pci/vfio_mdev_pci.c | 403 ++++++++++ drivers/vfio/pci/vfio_pci.c | 1449 +--------------------------------- drivers/vfio/pci/vfio_pci_common.c | 1458 +++++++++++++++++++++++++++++++++++ drivers/vfio/pci/vfio_pci_config.c | 9 + drivers/vfio/pci/vfio_pci_private.h | 36 + samples/Kconfig | 11 + 7 files changed, 1933 insertions(+), 1442 deletions(-) create mode 100644 drivers/vfio/pci/vfio_mdev_pci.c create mode 100644 drivers/vfio/pci/vfio_pci_common.c