From patchwork Sat Apr 1 14:44:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13197015 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 15C68C76196 for ; Sat, 1 Apr 2023 14:44:50 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 782B110E1BE; Sat, 1 Apr 2023 14:44:45 +0000 (UTC) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6AEBB10E224; Sat, 1 Apr 2023 14:44:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1680360277; x=1711896277; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Hl2dkQNmXDpUh7X8DM3A4uL+zEobUvRXjuLA5s2BKLk=; b=COfd50x+LqZGnlZjsmaA7CO2kE3icabD4NoN0W9SHhQRAFSax5Wmax42 b8zYUTbKcMO5AorxI8YqqPzwWpSP5VdatvEdEW7QA7PKYz2BNs33WT9zR nVaIRwmqds9Tm2mOXTwSfBIsqJnwPkSyD/pFBcra/Xf1gmZvELaxfk+5M AfuJMXgCDAWl7O5ZHgFd4RP+cWW5DpIQw8yA7h24PiOg7ta6kBLY7PE3E EwvX5WYrXKKsQkrrY0tlIckBf6SOvOZclRMXJjG+Z2wVqpvI0xSLv2j68 ZVL80PxDSYGmJqSZ6G7ToLYfpJD1K2t1CphvbUQIzsQg0ztrn2KlJj0qx Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10667"; a="340385137" X-IronPort-AV: E=Sophos;i="5.98,310,1673942400"; d="scan'208";a="340385137" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Apr 2023 07:44:36 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10667"; a="662705841" X-IronPort-AV: E=Sophos;i="5.98,310,1673942400"; d="scan'208";a="662705841" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orsmga006.jf.intel.com with ESMTP; 01 Apr 2023 07:44:36 -0700 From: Yi Liu To: alex.williamson@redhat.com, jgg@nvidia.com, kevin.tian@intel.com Date: Sat, 1 Apr 2023 07:44:24 -0700 Message-Id: <20230401144429.88673-8-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230401144429.88673-1-yi.l.liu@intel.com> References: <20230401144429.88673-1-yi.l.liu@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v3 07/12] vfio: Accpet device file from vfio PCI hot reset path X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mjrosato@linux.ibm.com, jasowang@redhat.com, xudong.hao@intel.com, peterx@redhat.com, terrence.xu@intel.com, chao.p.peng@linux.intel.com, linux-s390@vger.kernel.org, yi.l.liu@intel.com, kvm@vger.kernel.org, lulu@redhat.com, yanting.jiang@intel.com, joro@8bytes.org, nicolinc@nvidia.com, yan.y.zhao@intel.com, intel-gfx@lists.freedesktop.org, eric.auger@redhat.com, intel-gvt-dev@lists.freedesktop.org, yi.y.sun@linux.intel.com, cohuck@redhat.com, shameerali.kolothum.thodi@huawei.com, suravee.suthikulpanit@amd.com, robin.murphy@arm.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" This extends both vfio_file_is_valid() and vfio_file_has_dev() to accept device file from the vfio PCI hot reset. Reviewed-by: Kevin Tian Reviewed-by: Jason Gunthorpe Tested-by: Yanting Jiang Signed-off-by: Yi Liu Reviewed-by: Eric Auger --- drivers/vfio/vfio_main.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c index fe7446805afd..ebbb6b91a498 100644 --- a/drivers/vfio/vfio_main.c +++ b/drivers/vfio/vfio_main.c @@ -1154,13 +1154,23 @@ const struct file_operations vfio_device_fops = { .mmap = vfio_device_fops_mmap, }; +static struct vfio_device *vfio_device_from_file(struct file *file) +{ + struct vfio_device *device = file->private_data; + + if (file->f_op != &vfio_device_fops) + return NULL; + return device; +} + /** * vfio_file_is_valid - True if the file is valid vfio file * @file: VFIO group file or VFIO device file */ bool vfio_file_is_valid(struct file *file) { - return vfio_group_from_file(file); + return vfio_group_from_file(file) || + vfio_device_from_file(file); } EXPORT_SYMBOL_GPL(vfio_file_is_valid); @@ -1174,12 +1184,17 @@ EXPORT_SYMBOL_GPL(vfio_file_is_valid); bool vfio_file_has_dev(struct file *file, struct vfio_device *device) { struct vfio_group *group; + struct vfio_device *vdev; group = vfio_group_from_file(file); - if (!group) - return false; + if (group) + return vfio_group_has_dev(group, device); + + vdev = vfio_device_from_file(file); + if (vdev) + return vdev == device; - return vfio_group_has_dev(group, device); + return false; } EXPORT_SYMBOL_GPL(vfio_file_has_dev);