From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by dpdk.org (Postfix) with ESMTP id 108128D86 for ; Fri, 25 Dec 2015 11:33:17 +0100 (CET) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga104.fm.intel.com with ESMTP; 25 Dec 2015 02:33:16 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,478,1444719600"; d="scan'208";a="878478413" Received: from dpdk15.sh.intel.com ([10.239.129.25]) by orsmga002.jf.intel.com with ESMTP; 25 Dec 2015 02:33:15 -0800 From: Huawei Xie To: dev@dpdk.org Date: Fri, 25 Dec 2015 02:38:08 +0800 Message-Id: <1450982292-129560-1-git-send-email-huawei.xie@intel.com> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <20151222035041.GA7532@pxdev.xzpeter.org> References: <20151222035041.GA7532@pxdev.xzpeter.org> Subject: [dpdk-dev] [PATCH 0/4] check if any kernel driver is manipulating the virtio device X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 25 Dec 2015 10:33:18 -0000 virtio PMD doesn't set RTE_PCI_DRV_NEED_MAPPING in drv_flags of its eth_driver. It will try igb_uio and PORT IO in turn to configure virtio device. Even user in guest VM doesn't want to use virtio for DPDK, virtio PMD will take over the device blindly. The more serious problem is kernel driver is still manipulating the device, which causes driver conflict. This patch checks if there is any kernel driver manipulating the virtio device before virtio PMD uses port IO to configure the device. Huawei Xie (4): eal: make the comment more accurate eal: set kdrv to RTE_KDRV_NONE if kernel driver isn't manipulating the device. virtio: return 1 to tell the kernel we don't take over this device virtio: check if any kernel driver is manipulating the virtio device drivers/net/virtio/virtio_ethdev.c | 15 +++++++++++++-- lib/librte_eal/common/eal_common_pci.c | 8 ++++---- lib/librte_eal/linuxapp/eal/eal_pci.c | 2 +- 3 files changed, 18 insertions(+), 7 deletions(-) -- 1.8.1.4