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authorGreg Kurz <gkurz@linux.vnet.ibm.com>2015-06-17 15:23:29 +0200
committerMichael S. Tsirkin <mst@redhat.com>2015-06-17 17:12:53 +0200
commit332f64073bddc9240cd572f64682a44572b67049 (patch)
treec4eee4d236a123ae09346be9fd9303ca5f9bb190 /linux-headers
parent6a084ea39aec84d352dbd3de0f523daaaaac8c7d (diff)
downloadqemu-arm-332f64073bddc9240cd572f64682a44572b67049.tar.gz
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')
-rw-r--r--linux-headers/linux/vhost.h14
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. */