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| author | Greg Kurz <gkurz@linux.vnet.ibm.com> | 2016-02-05 11:45:40 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2016-02-16 12:05:17 +0200 |
| commit | a122ab24725c0392d4f53105aff343e703119fbe (patch) | |
| tree | 4de9dbc3835f1c93fe7915607ec573305ec68c73 /hw/virtio | |
| parent | 3154d1e426e8a82730119984b1b25b830830c1d2 (diff) | |
| download | qemu-a122ab24725c0392d4f53105aff343e703119fbe.zip qemu-a122ab24725c0392d4f53105aff343e703119fbe.tar.gz qemu-a122ab24725c0392d4f53105aff343e703119fbe.tar.bz2 | |
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>
Diffstat (limited to 'hw/virtio')
| -rw-r--r-- | hw/virtio/vhost.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 7dff755..6fea07c 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -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); |