qemu-devel
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Qemu-devel] [PULL v2 01/16] dataplane: fix cross-endian issues


From: Michael S. Tsirkin
Subject: [Qemu-devel] [PULL v2 01/16] dataplane: fix cross-endian issues
Date: Wed, 8 Jul 2015 12:41:26 +0300

From: Greg Kurz <address@hidden>

Accesses to vring_avail_event and vring_used_event must honor the queue
endianness.

This patch allows cross-endian setups to use dataplane (tested with ppc64
on ppc64le, and vice-versa).

Suggested-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: Cornelia Huck <address@hidden>
---
 hw/virtio/dataplane/vring.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/hw/virtio/dataplane/vring.c b/hw/virtio/dataplane/vring.c
index 3589185..bed9b11 100644
--- a/hw/virtio/dataplane/vring.c
+++ b/hw/virtio/dataplane/vring.c
@@ -153,7 +153,8 @@ bool vring_should_notify(VirtIODevice *vdev, Vring *vring)
         return true;
     }
 
-    return vring_need_event(vring_used_event(&vring->vr), new, old);
+    return vring_need_event(virtio_tswap16(vdev, vring_used_event(&vring->vr)),
+                            new, old);
 }
 
 
@@ -407,7 +408,8 @@ int vring_pop(VirtIODevice *vdev, Vring *vring,
     /* On success, increment avail index. */
     vring->last_avail_idx++;
     if (virtio_has_feature(vdev, VIRTIO_RING_F_EVENT_IDX)) {
-        vring_avail_event(&vring->vr) = vring->last_avail_idx;
+        vring_avail_event(&vring->vr) =
+            virtio_tswap16(vdev, vring->last_avail_idx);
     }
 
     return head;
-- 
MST




reply via email to

[Prev in Thread] Current Thread [Next in Thread]