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virtio: make features 64bit wide

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Make features 64bit wide everywhere.

On migration a full 64bit guest_features field is sent if one of the
high bits is set, in addition to the lower 32bit guest_features field
which must stay for compatibility reasons.  That way we send the lower
32 feature bits twice, but the code is simpler because we don't have
to split and compose the 64bit features into two 32bit fields.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Gerd Hoffmann 2015-06-01 10:45:40 +02:00 • committed by Michael S. Tsirkin
parent fdba6d967e
commit 019a3edbb2
11 changed files with 81 additions and 40 deletions
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18
hw/net/virtio-net.c
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@ -435,7 +435,7 @@ static void virtio_net_set_queues(VirtIONet *n)
static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue);
static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features)
static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t features)
{
VirtIONet *n = VIRTIO_NET(vdev);
NetClientState *nc = qemu_get_queue(n->nic);
@ -468,9 +468,9 @@ static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features)
return vhost_net_get_features(get_vhost_net(nc->peer), features);
}
static uint32_t virtio_net_bad_features(VirtIODevice *vdev)
static uint64_t virtio_net_bad_features(VirtIODevice *vdev)
{
uint32_t features = 0;
uint64_t features = 0;
/* Linux kernel 2.6.25. It understood MAC (as everyone must),
* but also these: */
@ -1032,10 +1032,12 @@ static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t
if (i == 0)
return -1;
error_report("virtio-net unexpected empty queue: "
"i %zd mergeable %d offset %zd, size %zd, "
"guest hdr len %zd, host hdr len %zd guest features 0x%x",
i, n->mergeable_rx_bufs, offset, size,
n->guest_hdr_len, n->host_hdr_len, vdev->guest_features);
"i %zd mergeable %d offset %zd, size %zd, "
"guest hdr len %zd, host hdr len %zd "
"guest features 0x%" PRIx64,
i, n->mergeable_rx_bufs, offset, size,
n->guest_hdr_len, n->host_hdr_len,
vdev->guest_features);
exit(1);
}
@ -1518,7 +1520,7 @@ static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx,
vdev, idx, mask);
}
static void virtio_net_set_config_size(VirtIONet *n, uint32_t host_features)
static void virtio_net_set_config_size(VirtIONet *n, uint64_t host_features)
{
int i, config_size = 0;
virtio_add_feature(&host_features, VIRTIO_NET_F_MAC);