[dpdk-dev] [PATCH 0/4] check if any kernel driver is manipulating the virtio device
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
[dpdk-dev] [PATCH 0/4] check if any kernel driver is manipulating the virtio device
On Fri, Dec 25, 2015 at 02:38:08AM +0800, Huawei Xie wrote: > 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 Thanks for the patch. Looks good to me. Peter > > 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 >
