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Implements the device end of virtio-net, so a peer running the stock virtio-net driver sees this side as a network card, and registers a netdev lowerhalf. Ring layout follows the peer's numbering: vq[0] is its RX queue, which we fill to transmit, and vq[1] its TX queue, which we harvest. No features are negotiated, so every frame carries the zeroed legacy virtio_net_hdr. Peer buffers are reached by raw 64-bit address through an arch-provided translation window -- the AM67 RAT, identity mapping elsewhere -- splitting copies that straddle it. Also gives DRIVERS_VHOST a prompt; it was promptless and so unselectable without a driver forcing it. Verified on t3-gem-o1 against an unmodified Linux virtio_net: eth0 registers, ifup brings it to RUNNING, and the peer pings it 5/5 at 0.27 ms and 60/60 with 0% loss. Assisted-by: Claude Code:claude-fable-5 Signed-off-by: Ulaş Sertan Kemeç <sertan.usk@gmail.com>
28 lines
1.2 KiB
C
28 lines
1.2 KiB
C
/****************************************************************************
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* drivers/vhost/vhost-net.h
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __DRIVERS_VHOST_VHOST_NET_H
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#define __DRIVERS_VHOST_VHOST_NET_H
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int vhost_register_net_driver(void);
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#endif /* __DRIVERS_VHOST_VHOST_NET_H */
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