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hw/virtio: Add support for VDPA network simulation devices

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This patch adds support for VDPA network simulation devices.
The device is developed based on virtio-net and tap backend,
and supports hardware live migration function.

For more details, please refer to "docs/system/devices/vdpa-net.rst"

Signed-off-by: Hao Chen <chenh@yusur.tech>
Message-Id: <20240221073802.2888022-1-chenh@yusur.tech>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Hao Chen 2024-02-21 15:38:02 +08:00 • committed by Michael S. Tsirkin
parent 043e127a12
commit cd341fd1ff
9 changed files with 399 additions and 3 deletions
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16
hw/net/virtio-net.c
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@ -1999,6 +1999,22 @@ static ssize_t virtio_net_receive_rcu(NetClientState *nc, const uint8_t *buf,
goto err;
}
/* Mark dirty page's bitmap of guest memory */
if (vdev->lm_logging_ctrl == LM_ENABLE) {
uint64_t chunk = elem->in_addr[i] / VHOST_LOG_CHUNK;
/* Get chunk index */
BitmapMemoryRegionCaches *caches = qatomic_rcu_read(&vdev->caches);
uint64_t index = chunk / 8;
uint64_t shift = chunk % 8;
uint8_t val = 0;
address_space_read_cached(&caches->bitmap, index, &val,
sizeof(val));
val |= 1 << shift;
address_space_write_cached(&caches->bitmap, index, &val,
sizeof(val));
address_space_cache_invalidate(&caches->bitmap, index, sizeof(val));
}
elems[i] = elem;
lens[i] = total;
i++;