2016-02-25 12:30, Mauricio V?squez:
> Hello,
>
> I am trying to connect two virtual machines through Open vSwitch using
> vhost-user ports, on the host side everything looks fine.
> When using the standard virtio drivers both virtual machines are able to
> exchange traffic, but when I load the virtio PMD and run a DPDK application
> it shows the following error message:
>
> ...
> EAL: PCI device 0000:00:04.0 on NUMA socket -1
> EAL: probe driver: 1af4:1000 rte_virtio_pmd
> EAL: PCI memory mapped at 0x7f892dc00000
> PMD: virtio_read_caps(): [40] skipping non VNDR cap id: 11
> PMD: virtio_read_caps(): no modern virtio pci device found.
> PMD: vtpci_init(): trying with legacy virtio pci.
> EAL: eal_parse_sysfs_value(): cannot open sysfs value
> /sys/bus/pci/devices/0000:00:04.0/uio/uio0/portio/port0/start
> EAL: pci_uio_ioport_map(): cannot parse portio start
> EAL: Error - exiting with code: 1
> Cause: Requested device 0000:00:04.0 cannot be used
> ...
>
> I tried it using the master version of DPDK, when I use the 2.2 version it
> works without problems:
>
> ...
> PMD: parse_sysfs_value(): parse_sysfs_value(): cannot open sysfs value
> /sys/bus/pci/devices/0000:00:04.0/uio/uio0/portio/port0/size
> PMD: virtio_resource_init_by_uio(): virtio_resource_init_by_uio(): cannot
> parse size
> PMD: virtio_resource_init_by_ioports(): PCI Port IO found start=0xc100 with
> size=0x20
> PMD: virtio_negotiate_features(): guest_features before negotiate = cf8020
> PMD: virtio_negotiate_features(): host_features before negotiate = 40268020
> PMD: virtio_negotiate_features(): features after negotiate = 68020
> PMD: eth_virtio_dev_init(): PORT MAC: 00:00:00:00:00:11
> PMD: eth_virtio_dev_init(): VIRTIO_NET_F_STATUS is not supported
> PMD: eth_virtio_dev_init(): VIRTIO_NET_F_MQ is not supported
> PMD: virtio_dev_cq_queue_setup(): >>
> PMD: virtio_dev_queue_setup(): selecting queue: 2
> PMD: virtio_dev_queue_setup(): vq_size: 64 nb_desc:0
> PMD: virtio_dev_queue_setup(): vring_size: 4612, rounded_vring_size: 8192
> PMD: virtio_dev_queue_setup(): vq->vq_ring_mem: 0x76d43000
> PMD: virtio_dev_queue_setup(): vq->vq_ring_virt_mem: 0x7fa669743000
> PMD: eth_virtio_dev_init(): config->max_virtqueue_pairs=1
> PMD: eth_virtio_dev_init(): config->status=0
> PMD: eth_virtio_dev_init(): PORT MAC: 00:00:00:00:00:11
> PMD: eth_virtio_dev_init(): hw->max_rx_queues=1 hw->max_tx_queues=1
> PMD: eth_virtio_dev_init(): port 0 vendorID=0x1af4 deviceID=0x1000
> PMD: virtio_dev_vring_start(): >>
> ...
>
> According to git bisect it appears to be that it does not work anymore
> after the b8f04520ad71 ("virtio: use PCI ioport API") commit.
It is now fixed:
http://dpdk.org/browse/dpdk/commit/?id=2b29a7a4c1a
Thanks for reporting.
