From 424085f61d60f286a4b2612c7bce621d78a74f5d Mon Sep 17 00:00:00 2001 From: Thomas Huth Date: Fri, 3 Jul 2015 19:13:33 +0200 Subject: [PATCH 023/100] linux-headers: sync vhost.h Message-id: <1435950819-10991-2-git-send-email-thuth@redhat.com> Patchwork-id: 66694 O-Subject: [RHEL7.2 qemu-kvm-rhev PATCH 1/7] linux-headers: sync vhost.h Bugzilla: 1225715 RH-Acked-by: Michael S. Tsirkin RH-Acked-by: Laurent Vivier RH-Acked-by: David Gibson From: Greg Kurz This patch brings the cross-endian vhost API to QEMU. Signed-off-by: Greg Kurz Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin (cherry picked from commit 332f64073bddc9240cd572f64682a44572b67049) Signed-off-by: Thomas Huth Signed-off-by: Miroslav Rezanina --- linux-headers/linux/vhost.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/linux-headers/linux/vhost.h b/linux-headers/linux/vhost.h index c656f61..ead86db 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. */ -- 1.8.3.1