diff options
Diffstat (limited to 'drivers/s390/kvm/kvm_virtio.c')
| -rw-r--r-- | drivers/s390/kvm/kvm_virtio.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/s390/kvm/kvm_virtio.c b/drivers/s390/kvm/kvm_virtio.c index 643129070c51..dd65c8b4c7fe 100644 --- a/drivers/s390/kvm/kvm_virtio.c +++ b/drivers/s390/kvm/kvm_virtio.c @@ -80,7 +80,7 @@ static unsigned desc_size(const struct kvm_device_desc *desc) } /* This gets the device's feature bits. */ -static u32 kvm_get_features(struct virtio_device *vdev) +static u64 kvm_get_features(struct virtio_device *vdev) { unsigned int i; u32 features = 0; @@ -93,7 +93,7 @@ static u32 kvm_get_features(struct virtio_device *vdev) return features; } -static void kvm_finalize_features(struct virtio_device *vdev) +static int kvm_finalize_features(struct virtio_device *vdev) { unsigned int i, bits; struct kvm_device_desc *desc = to_kvmdev(vdev)->desc; @@ -103,12 +103,17 @@ static void kvm_finalize_features(struct virtio_device *vdev) /* Give virtio_ring a chance to accept features. */ vring_transport_features(vdev); + /* Make sure we don't have any features > 32 bits! */ + BUG_ON((u32)vdev->features != vdev->features); + memset(out_features, 0, desc->feature_len); bits = min_t(unsigned, desc->feature_len, sizeof(vdev->features)) * 8; for (i = 0; i < bits; i++) { - if (test_bit(i, vdev->features)) + if (__virtio_test_bit(vdev, i)) out_features[i / 8] |= (1 << (i % 8)); } + + return 0; } /* |