vhost: enable virtio MTU feature
This patch enables the new VIRTIO_NET_F_MTU feature, which makes possible for the host to advise the guest with its maximum supported MTU. MTU value is set via QEMU parameters, either via Libvirt XML, or directly in virtio-net device command line arguments. Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com> Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
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@ -66,7 +66,8 @@
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(1ULL << VIRTIO_NET_F_GUEST_CSUM) | \
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(1ULL << VIRTIO_NET_F_GUEST_TSO4) | \
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(1ULL << VIRTIO_NET_F_GUEST_TSO6) | \
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(1ULL << VIRTIO_RING_F_INDIRECT_DESC))
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(1ULL << VIRTIO_RING_F_INDIRECT_DESC) | \
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(1ULL << VIRTIO_NET_F_MTU))
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uint64_t VHOST_FEATURES = VHOST_SUPPORTED_FEATURES;
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@ -120,6 +120,10 @@ struct vhost_virtqueue {
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#endif
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#define VHOST_MAX_QUEUE_PAIRS 0x80
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#ifndef VIRTIO_NET_F_MTU
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#define VIRTIO_NET_F_MTU 3
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#endif
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/*
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* Define virtio 1.0 for older kernels
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*/
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