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virtio: list legacy-capable devices

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Several types of virtio devices had already been around before the
virtio standard was specified. These devices support virtio in legacy
(and transitional) mode.

Devices that have been added in the virtio standard are considered
non-transitional (i.e. with no support for legacy virtio).

Provide a helper function so virtio transports can figure that out
easily.

Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20200707105446.677966-2-cohuck@redhat.com>
Cc: qemu-stable@nongnu.org
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Cornelia Huck 2020-07-07 12:54:45 +02:00 • committed by Michael S. Tsirkin
parent 3219b42f02
commit 7c78bdd7a3
2 changed files with 27 additions and 0 deletions
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2
include/hw/virtio/virtio.h
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@ -396,4 +396,6 @@ static inline bool virtio_device_disabled(VirtIODevice *vdev)
return unlikely(vdev->disabled || vdev->broken);
}
bool virtio_legacy_allowed(VirtIODevice *vdev);
#endif