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dm: virtio: remove hv_caps from virtio_ops

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currently, each virtio device has their own virtio_ops implementation.
Take virtio-blk for example:

static struct virtio_ops virtio_blk_ops = {
        "virtio_blk",
        1,
        sizeof(struct virtio_blk_config),
        virtio_blk_reset,
        virtio_blk_notify,
        virtio_blk_cfgread,
        virtio_blk_cfgwrite,
        NULL,
        NULL,
        VIRTIO_BLK_S_HOSTCAPS,
};

If start DM with two virtio-blk, this global variable will be
assigined to two virtio-blk instances. Changing hv_caps for one
instance will affect others. But different instances may need
different capabilities.

To support this requirement, we suggest to move hv_caps to
virtio_base structure, and each instance can return their own
capabilities.

Signed-off-by: Conghui Chen <conghui.chen@intel.com>
Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>
This commit is contained in:
Conghui Chen
2018-07-27 09:50:55 +00:00
committed by lijinxia
parent a2b299179d
commit f4fcf5d6eb
11 changed files with 12 additions and 18 deletions
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2
devicemodel/hw/pci/virtio/virtio_net.c
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@@ -168,7 +168,6 @@ static struct virtio_ops virtio_net_ops = {
virtio_net_cfgwrite, /* write PCI config */
virtio_net_neg_features, /* apply negotiated features */
NULL, /* called on guest set status */
VIRTIO_NET_S_HOSTCAPS, /* our capabilities */
};
static struct ether_addr *
@@ -914,6 +913,7 @@ virtio_net_init(struct vmctx *ctx, struct pci_vdev *dev, char *opts)
virtio_linkup(&net->base, &virtio_net_ops, net, dev, net->queues);
net->base.mtx = &net->mtx;
net->base.device_caps = VIRTIO_NET_S_HOSTCAPS;
net->queues[VIRTIO_NET_RXQ].qsize = VIRTIO_NET_RINGSZ;
net->queues[VIRTIO_NET_RXQ].notify = virtio_net_ping_rxq;