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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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2
hw/char/virtio-serial-bus.c
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@ -498,7 +498,7 @@ static void handle_input(VirtIODevice *vdev, VirtQueue *vq)
}
}
static uint32_t get_features(VirtIODevice *vdev, uint32_t features)
static uint64_t get_features(VirtIODevice *vdev, uint64_t features)
{
VirtIOSerial *vser;