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[Qemu-devel] [PULL 04/13] vhost: move virtio 1.0 check to cross-endian h
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] [PULL 04/13] vhost: move virtio 1.0 check to cross-endian helper |
Date: |
Fri, 19 Feb 2016 10:00:18 +0200 |
From: Greg Kurz <address@hidden>
Indeed vhost doesn't need to ask for vring endian fixing if the device is
virtio 1.0, since it is already handled by the in-kernel vhost driver. This
patch simply consolidates the logic into the existing helper.
Reviewed-by: Cornelia Huck <address@hidden>
Signed-off-by: Greg Kurz <address@hidden>
Reviewed-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Michael S. Tsirkin <address@hidden>
Reviewed-by: Laurent Vivier <address@hidden>
---
hw/virtio/vhost.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index 6fea07c..bb17177 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -751,6 +751,9 @@ static void vhost_log_stop(MemoryListener *listener,
static inline bool vhost_needs_vring_endian(VirtIODevice *vdev)
{
+ if (virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) {
+ return false;
+ }
#ifdef TARGET_IS_BIENDIAN
#ifdef HOST_WORDS_BIGENDIAN
return !virtio_is_big_endian(vdev);
@@ -812,8 +815,7 @@ static int vhost_virtqueue_start(struct vhost_dev *dev,
return -errno;
}
- if (!virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1) &&
- vhost_needs_vring_endian(vdev)) {
+ if (vhost_needs_vring_endian(vdev)) {
r = vhost_virtqueue_set_vring_endian_legacy(dev,
virtio_is_big_endian(vdev),
vhost_vq_index);
@@ -909,8 +911,7 @@ static void vhost_virtqueue_stop(struct vhost_dev *dev,
/* In the cross-endian case, we need to reset the vring endianness to
* native as legacy devices expect so by default.
*/
- if (!virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1) &&
- vhost_needs_vring_endian(vdev)) {
+ if (vhost_needs_vring_endian(vdev)) {
r = vhost_virtqueue_set_vring_endian_legacy(dev,
!virtio_is_big_endian(vdev),
vhost_vq_index);
--
MST
- [Qemu-devel] [PULL 00/13] vhost, virtio, pci, pxe, Michael S. Tsirkin, 2016/02/19
- [Qemu-devel] [PULL 01/13] virtio-net: use the backend cross-endian capabilities, Michael S. Tsirkin, 2016/02/19
- [Qemu-devel] [PULL 02/13] vhost-net: revert support of cross-endian vnet headers, Michael S. Tsirkin, 2016/02/19
- [Qemu-devel] [PULL 03/13] virtio: move cross-endian helper to vhost, Michael S. Tsirkin, 2016/02/19
- [Qemu-devel] [PULL 05/13] vhost: simplify vhost_needs_vring_endian(), Michael S. Tsirkin, 2016/02/19
- [Qemu-devel] [PULL 04/13] vhost: move virtio 1.0 check to cross-endian helper,
Michael S. Tsirkin <=
- [Qemu-devel] [PULL 06/13] virtio: optimize virtio_access_is_big_endian() for little-endian targets, Michael S. Tsirkin, 2016/02/19
- [Qemu-devel] [PULL 07/13] msix: fix msix_vector_masked, Michael S. Tsirkin, 2016/02/19
- [Qemu-devel] [PULL 08/13] tests: add pxe e1000 and virtio-pci tests, Michael S. Tsirkin, 2016/02/19
- [Qemu-devel] [PULL 09/13] dec: convert to realize(), Michael S. Tsirkin, 2016/02/19
- [Qemu-devel] [PULL 10/13] change type of pci_bridge_initfn() to void, Michael S. Tsirkin, 2016/02/19
- [Qemu-devel] [PULL 11/13] rules: filter out irrelevant files, Michael S. Tsirkin, 2016/02/19
- [Qemu-devel] [PULL 12/13] vhost-user interrupt management fixes, Michael S. Tsirkin, 2016/02/19