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virtio: fixes

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A small fix for a uapi header, and a fix for VDPA for non-x86 guests.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio fixes from Michael Tsirkin:
 "A small fix for a uapi header, and a fix for VDPA for non-x86 guests"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio: drop internal struct from UAPI
  virtio: support VIRTIO_F_ORDER_PLATFORM
This commit is contained in:
Linus Torvalds 2019-02-07 08:05:28 +00:00
commit b0314565da
3 changed files with 20 additions and 11 deletions
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15
drivers/virtio/virtio_ring.c
View File

@ -152,7 +152,12 @@ struct vring_virtqueue {
/* Available for packed ring */
struct {
/* Actual memory layout for this queue. */
struct vring_packed vring;
struct {
unsigned int num;
struct vring_packed_desc *desc;
struct vring_packed_desc_event *driver;
struct vring_packed_desc_event *device;
} vring;
/* Driver ring wrap counter. */
bool avail_wrap_counter;
@ -1609,6 +1614,9 @@ static struct virtqueue *vring_create_virtqueue_packed(
!context;
vq->event = virtio_has_feature(vdev, VIRTIO_RING_F_EVENT_IDX);
if (virtio_has_feature(vdev, VIRTIO_F_ORDER_PLATFORM))
vq->weak_barriers = false;
vq->packed.ring_dma_addr = ring_dma_addr;
vq->packed.driver_event_dma_addr = driver_event_dma_addr;
vq->packed.device_event_dma_addr = device_event_dma_addr;
@ -2079,6 +2087,9 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index,
!context;
vq->event = virtio_has_feature(vdev, VIRTIO_RING_F_EVENT_IDX);
if (virtio_has_feature(vdev, VIRTIO_F_ORDER_PLATFORM))
vq->weak_barriers = false;
vq->split.queue_dma_addr = 0;
vq->split.queue_size_in_bytes = 0;
@ -2213,6 +2224,8 @@ void vring_transport_features(struct virtio_device *vdev)
break;
case VIRTIO_F_RING_PACKED:
break;
case VIRTIO_F_ORDER_PLATFORM:
break;
default:
/* We don't understand this bit. */
__virtio_clear_bit(vdev, i);

6
include/uapi/linux/virtio_config.h
View File

@ -78,6 +78,12 @@
/* This feature indicates support for the packed virtqueue layout. */
#define VIRTIO_F_RING_PACKED 34
/*
* This feature indicates that memory accesses by the driver and the
* device are ordered in a way described by the platform.
*/
#define VIRTIO_F_ORDER_PLATFORM 36
/*
* Does the device support Single Root I/O Virtualization?
*/

10
include/uapi/linux/virtio_ring.h
View File

@ -213,14 +213,4 @@ struct vring_packed_desc {
__le16 flags;
};
struct vring_packed {
unsigned int num;
struct vring_packed_desc *desc;
struct vring_packed_desc_event *driver;
struct vring_packed_desc_event *device;
};
#endif /* _UAPI_LINUX_VIRTIO_RING_H */