diff options
| author | Michael S. Tsirkin <mst@redhat.com> | 2014-12-01 14:52:40 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2014-12-09 11:06:32 +0100 |
| commit | 747ae34a6ef681fbd993be214d8c0a30bd4a2fda (patch) | |
| tree | 3905b0413ec10b96e9a62af9d19acc682c8390dc /drivers/virtio | |
| parent | virtio_balloon: add legacy_only flag (diff) | |
| download | linux-747ae34a6ef681fbd993be214d8c0a30bd4a2fda.tar.xz linux-747ae34a6ef681fbd993be214d8c0a30bd4a2fda.zip | |
virtio: make VIRTIO_F_VERSION_1 a transport bit
Activate VIRTIO_F_VERSION_1 automatically unless legacy_only
is set.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio')
| -rw-r--r-- | drivers/virtio/virtio.c | 6 | ||||
| -rw-r--r-- | drivers/virtio/virtio_ring.c | 2 |
2 files changed, 7 insertions, 1 deletions
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c index f9ad99c8b352..fa6b75db5f1f 100644 --- a/drivers/virtio/virtio.c +++ b/drivers/virtio/virtio.c @@ -197,7 +197,11 @@ static int virtio_dev_probe(struct device *_d) driver_features_legacy = driver_features; } - if (driver_features & device_features & (1ULL << VIRTIO_F_VERSION_1)) + /* Detect legacy-only drivers and disable VIRTIO_F_VERSION_1. */ + if (drv->legacy_only) + device_features &= ~(1ULL << VIRTIO_F_VERSION_1); + + if (device_features & (1ULL << VIRTIO_F_VERSION_1)) dev->features = driver_features & device_features; else dev->features = driver_features_legacy & device_features; diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 55532a43ead3..00ec6b3f96b2 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -780,6 +780,8 @@ void vring_transport_features(struct virtio_device *vdev) break; case VIRTIO_RING_F_EVENT_IDX: break; + case VIRTIO_F_VERSION_1: + break; default: /* We don't understand this bit. */ __virtio_clear_bit(vdev, i); |