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author | Jason Baron | 2018-03-08 04:25:41 +0100 |
---|---|---|
committer | Michael S. Tsirkin | 2018-03-13 22:09:49 +0100 |
commit | 9473939ed7addcaaeb8fde5c093918fb7fa0919c (patch) | |
tree | c11ed76a0835dc9ea9cd90e9ad12a0dcc75dbdac /hw/net/virtio-net.c | |
parent | virtio-net: use 64-bit values for feature flags (diff) | |
download | qemu-9473939ed7addcaaeb8fde5c093918fb7fa0919c.tar.gz qemu-9473939ed7addcaaeb8fde5c093918fb7fa0919c.tar.xz qemu-9473939ed7addcaaeb8fde5c093918fb7fa0919c.zip |
virtio-net: add linkspeed and duplex settings to virtio-net
Although linkspeed and duplex can be set in a linux guest via 'ethtool -s',
this requires custom ethtool commands for virtio-net by default.
Introduce a new feature flag, VIRTIO_NET_F_SPEED_DUPLEX, which allows
the hypervisor to export a linkspeed and duplex setting. The user can
subsequently overwrite it later if desired via: 'ethtool -s'.
Linkspeed and duplex settings can be set as:
'-device virtio-net,speed=10000,duplex=full'
where speed is [0...INT_MAX], and duplex is ["half"|"full"].
Signed-off-by: Jason Baron <jbaron@akamai.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: virtio-dev@lists.oasis-open.org
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/net/virtio-net.c')
-rw-r--r-- | hw/net/virtio-net.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index ab06f933bc..67ad38cfe4 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -26,6 +26,7 @@ #include "qapi/qapi-events-net.h" #include "hw/virtio/virtio-access.h" #include "migration/misc.h" +#include "standard-headers/linux/ethtool.h" #define VIRTIO_NET_VM_VERSION 11 @@ -61,6 +62,8 @@ static VirtIOFeature feature_sizes[] = { .end = endof(struct virtio_net_config, max_virtqueue_pairs)}, {.flags = 1ULL << VIRTIO_NET_F_MTU, .end = endof(struct virtio_net_config, mtu)}, + {.flags = 1ULL << VIRTIO_NET_F_SPEED_DUPLEX, + .end = endof(struct virtio_net_config, duplex)}, {} }; @@ -89,6 +92,8 @@ static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) virtio_stw_p(vdev, &netcfg.max_virtqueue_pairs, n->max_queues); virtio_stw_p(vdev, &netcfg.mtu, n->net_conf.mtu); memcpy(netcfg.mac, n->mac, ETH_ALEN); + virtio_stl_p(vdev, &netcfg.speed, n->net_conf.speed); + netcfg.duplex = n->net_conf.duplex; memcpy(config, &netcfg, n->config_size); } @@ -1941,6 +1946,25 @@ static void virtio_net_device_realize(DeviceState *dev, Error **errp) n->host_features |= (1ULL << VIRTIO_NET_F_MTU); } + if (n->net_conf.duplex_str) { + if (strncmp(n->net_conf.duplex_str, "half", 5) == 0) { + n->net_conf.duplex = DUPLEX_HALF; + } else if (strncmp(n->net_conf.duplex_str, "full", 5) == 0) { + n->net_conf.duplex = DUPLEX_FULL; + } else { + error_setg(errp, "'duplex' must be 'half' or 'full'"); + } + n->host_features |= (1ULL << VIRTIO_NET_F_SPEED_DUPLEX); + } else { + n->net_conf.duplex = DUPLEX_UNKNOWN; + } + + if (n->net_conf.speed < SPEED_UNKNOWN) { + error_setg(errp, "'speed' must be between 0 and INT_MAX"); + } else if (n->net_conf.speed >= 0) { + n->host_features |= (1ULL << VIRTIO_NET_F_SPEED_DUPLEX); + } + virtio_net_set_config_size(n, n->host_features); virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size); @@ -2161,6 +2185,8 @@ static Property virtio_net_properties[] = { DEFINE_PROP_UINT16("host_mtu", VirtIONet, net_conf.mtu, 0), DEFINE_PROP_BOOL("x-mtu-bypass-backend", VirtIONet, mtu_bypass_backend, true), + DEFINE_PROP_INT32("speed", VirtIONet, net_conf.speed, SPEED_UNKNOWN), + DEFINE_PROP_STRING("duplex", VirtIONet, net_conf.duplex_str), DEFINE_PROP_END_OF_LIST(), }; |