From patchwork Tue Oct 24 20:04:26 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kirsher, Jeffrey T" X-Patchwork-Id: 10025469 X-Patchwork-Delegate: bhelgaas@google.com 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 66E7160245 for ; Tue, 24 Oct 2017 20:04:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5541928A75 for ; Tue, 24 Oct 2017 20:04:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4A4B428A78; Tue, 24 Oct 2017 20:04:58 +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=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 3AFE328A75 for ; Tue, 24 Oct 2017 20:04:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751396AbdJXUEz (ORCPT ); Tue, 24 Oct 2017 16:04:55 -0400 Received: from mga14.intel.com ([192.55.52.115]:34129 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751336AbdJXUEz (ORCPT ); Tue, 24 Oct 2017 16:04:55 -0400 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 24 Oct 2017 13:04:54 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.43,429,1503385200"; d="scan'208";a="1451966" Received: from jtkirshe-desk.jf.intel.com (HELO jtkirshe-DESK.amr.corp.intel.com.com) ([134.134.177.54]) by orsmga002.jf.intel.com with ESMTP; 24 Oct 2017 13:04:54 -0700 From: Jeff Kirsher To: alex.williamson@redhat.com Cc: Liang-Min Wang , kvm@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, bhelgaas@google.com, alexander.h.duyck@intel.com Subject: [PATCH] Enable SR-IOV instantiation through /sys file Date: Tue, 24 Oct 2017 13:04:26 -0700 Message-Id: <20171024200426.62811-1-jeffrey.t.kirsher@intel.com> X-Mailer: git-send-email 2.14.2 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Liang-Min Wang When a SR-IOV supported device is bound with vfio-pci, the driver could not create SR-IOV instance through /sys/bus/pci/devices/... /sriov_numvfs. This patch re-activates this capability for a PCIe device that supports SR-IOV and is bound with vfio-pci.ko. Signed-off-by: Liang-Min Wang --- drivers/vfio/pci/vfio_pci.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c index f041b1a6cf66..8fbd362607e1 100644 --- a/drivers/vfio/pci/vfio_pci.c +++ b/drivers/vfio/pci/vfio_pci.c @@ -1256,6 +1256,7 @@ static void vfio_pci_remove(struct pci_dev *pdev) if (!vdev) return; + pci_disable_sriov(pdev); vfio_iommu_group_put(pdev->dev.iommu_group, &pdev->dev); kfree(vdev->region); kfree(vdev); @@ -1303,12 +1304,23 @@ static const struct pci_error_handlers vfio_err_handlers = { .error_detected = vfio_pci_aer_err_detected, }; +static int vfio_sriov_configure(struct pci_dev *pdev, int num_vfs) +{ + if (!num_vfs) { + pci_disable_sriov(pdev); + return 0; + } + + return pci_enable_sriov(pdev, num_vfs); +} + static struct pci_driver vfio_pci_driver = { .name = "vfio-pci", .id_table = NULL, /* only dynamic ids */ .probe = vfio_pci_probe, .remove = vfio_pci_remove, .err_handler = &vfio_err_handlers, + .sriov_configure = vfio_sriov_configure, }; struct vfio_devices {