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Revision 99b3718e

ID99b3718ee12ae5f1b41ccd848fb2f80ddb94a04e

Added by aliguori over 12 years ago

Use the default subsystem vendor ID for virtio devices (Mark McLoughlin)

A subsystem vendor ID of zero isn't allowed, so we use our
default ID.

Gerd points out that although the PCI subsystem vendor ID is
treated by the guest as the virtio vendor ID:

/* we use the subsystem vendor/device id as the virtio vendor/device
 * id.  this allows us to use the same PCI vendor/device id for all
 * virtio devices and to identify the particular virtio driver by
 * the subsytem ids */
vp_dev->vdev.id.vendor = pci_dev->subsystem_vendor;
vp_dev->vdev.id.device = pci_dev->subsystem_device;

it looks like only the device ID is used right now:

  1. grep virtio modules.alias
    alias virtio:d00000001v* virtio_net
    alias virtio:d00000002v* virtio_blk
    alias virtio:d00000003v* virtio_console
    alias virtio:d00000004v* virtio-rng
    alias virtio:d00000005v* virtio_balloon
    alias pci:v00001AF4d*sv*sd*bc*sc*i* virtio_pci
    alias virtio:d00000009v* 9pnet_virtio

so setting the subsystem vendor id to something != zero shouldn't cause
trouble.

Signed-off-by: Mark McLoughlin <>
Signed-off-by: Anthony Liguori <>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6440 c046a42c-6fe2-441c-8c8c-71466251a162

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