virtio: move cross-endian helper to vhost
If target is bi-endian (ppc64, arm), the virtio_legacy_is_cross_endian() indeed returns the runtime state of the virtio device. However, it returns false unconditionally in the general case. This sounds a bit strange given the name of the function. This helper is only useful for vhost actually, where indeed non bi-endian targets don't have to deal with cross-endian issues. This patch moves the helper to vhost.c and gives it a more appropriate name. Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Laurent Vivier <lvivier@redhat.com> Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Laurent Vivier <lvivier@redhat.com>
This commit is contained in:
parent
3154d1e426
commit
a122ab2472
@ -749,6 +749,19 @@ static void vhost_log_stop(MemoryListener *listener,
|
||||
/* FIXME: implement */
|
||||
}
|
||||
|
||||
static inline bool vhost_needs_vring_endian(VirtIODevice *vdev)
|
||||
{
|
||||
#ifdef TARGET_IS_BIENDIAN
|
||||
#ifdef HOST_WORDS_BIGENDIAN
|
||||
return !virtio_is_big_endian(vdev);
|
||||
#else
|
||||
return virtio_is_big_endian(vdev);
|
||||
#endif
|
||||
#else
|
||||
return false;
|
||||
#endif
|
||||
}
|
||||
|
||||
static int vhost_virtqueue_set_vring_endian_legacy(struct vhost_dev *dev,
|
||||
bool is_big_endian,
|
||||
int vhost_vq_index)
|
||||
@ -800,7 +813,7 @@ static int vhost_virtqueue_start(struct vhost_dev *dev,
|
||||
}
|
||||
|
||||
if (!virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1) &&
|
||||
virtio_legacy_is_cross_endian(vdev)) {
|
||||
vhost_needs_vring_endian(vdev)) {
|
||||
r = vhost_virtqueue_set_vring_endian_legacy(dev,
|
||||
virtio_is_big_endian(vdev),
|
||||
vhost_vq_index);
|
||||
@ -897,7 +910,7 @@ static void vhost_virtqueue_stop(struct vhost_dev *dev,
|
||||
* native as legacy devices expect so by default.
|
||||
*/
|
||||
if (!virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1) &&
|
||||
virtio_legacy_is_cross_endian(vdev)) {
|
||||
vhost_needs_vring_endian(vdev)) {
|
||||
r = vhost_virtqueue_set_vring_endian_legacy(dev,
|
||||
!virtio_is_big_endian(vdev),
|
||||
vhost_vq_index);
|
||||
|
@ -32,19 +32,6 @@ static inline bool virtio_access_is_big_endian(VirtIODevice *vdev)
|
||||
#endif
|
||||
}
|
||||
|
||||
static inline bool virtio_legacy_is_cross_endian(VirtIODevice *vdev)
|
||||
{
|
||||
#ifdef TARGET_IS_BIENDIAN
|
||||
#ifdef HOST_WORDS_BIGENDIAN
|
||||
return !virtio_is_big_endian(vdev);
|
||||
#else
|
||||
return virtio_is_big_endian(vdev);
|
||||
#endif
|
||||
#else
|
||||
return false;
|
||||
#endif
|
||||
}
|
||||
|
||||
static inline uint16_t virtio_lduw_phys(VirtIODevice *vdev, hwaddr pa)
|
||||
{
|
||||
if (virtio_access_is_big_endian(vdev)) {
|
||||
|
Loading…
Reference in New Issue
Block a user