[Qemu-devel] [PATCH 01/15] s390x: fix virtio feature bitmap

[Alexander Graf <agraf@suse.de>]

The feature bitmap in the s390 virtio machine is little endian. To
address for that, we need to bswap the values after reading them out.

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 hw/s390-virtio-bus.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/s390-virtio-bus.c b/hw/s390-virtio-bus.c
index 58af164..60e0135 100644
--- a/hw/s390-virtio-bus.c
+++ b/hw/s390-virtio-bus.c
@@ -223,7 +223,7 @@ void s390_virtio_device_sync(VirtIOS390Device *dev)
     cur_offs += num_vq * VIRTIO_VQCONFIG_LEN;
 
     /* Sync feature bitmap */
-    stl_phys(cur_offs, dev->host_features);
+    stl_phys(cur_offs, bswap32(dev->host_features));
 
     dev->feat_offs = cur_offs + dev->feat_len;
     cur_offs += dev->feat_len * 2;
@@ -246,7 +246,7 @@ void s390_virtio_device_update_status(VirtIOS390Device *dev)
 
     /* Update guest supported feature bitmap */
 
-    features = ldl_phys(dev->feat_offs);
+    features = bswap32(ldl_phys(dev->feat_offs));
     if (vdev->set_features) {
         vdev->set_features(vdev, features);
     }
-- 
1.6.0.2