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| author | Greg Kurz <gkurz@linux.vnet.ibm.com> | 2015-06-17 15:23:29 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2015-06-17 17:12:53 +0200 |
| commit | 332f64073bddc9240cd572f64682a44572b67049 (patch) | |
| tree | c4eee4d236a123ae09346be9fd9303ca5f9bb190 /linux-headers/linux/vhost.h | |
| parent | 6a084ea39aec84d352dbd3de0f523daaaaac8c7d (diff) | |
linux-headers: sync vhost.h
This patch brings the cross-endian vhost API to QEMU.
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>
Diffstat (limited to 'linux-headers/linux/vhost.h')
| -rw-r--r-- | linux-headers/linux/vhost.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/linux-headers/linux/vhost.h b/linux-headers/linux/vhost.h index c656f61cfc..ead86db91a 100644 --- a/linux-headers/linux/vhost.h +++ b/linux-headers/linux/vhost.h @@ -103,6 +103,20 @@ struct vhost_memory { /* Get accessor: reads index, writes value in num */ #define VHOST_GET_VRING_BASE _IOWR(VHOST_VIRTIO, 0x12, struct vhost_vring_state) +/* Set the vring byte order in num. Valid values are VHOST_VRING_LITTLE_ENDIAN + * or VHOST_VRING_BIG_ENDIAN (other values return -EINVAL). + * The byte order cannot be changed while the device is active: trying to do so + * returns -EBUSY. + * This is a legacy only API that is simply ignored when VIRTIO_F_VERSION_1 is + * set. + * Not all kernel configurations support this ioctl, but all configurations that + * support SET also support GET. + */ +#define VHOST_VRING_LITTLE_ENDIAN 0 +#define VHOST_VRING_BIG_ENDIAN 1 +#define VHOST_SET_VRING_ENDIAN _IOW(VHOST_VIRTIO, 0x13, struct vhost_vring_state) +#define VHOST_GET_VRING_ENDIAN _IOW(VHOST_VIRTIO, 0x14, struct vhost_vring_state) + /* The following ioctls use eventfd file descriptors to signal and poll * for events. */ |