From: Greg Kurz <gk...@linux.vnet.ibm.com>
This helper will be used by vhost and tap to detect cross-endianness in
the legacy virtio case.
Signed-off-by: Greg Kurz <gk...@linux.vnet.ibm.com>
Reviewed-by: Michael S. Tsirkin <m...@redhat.com>
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
---
include/hw/virtio/virtio-access.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/include/hw/virtio/virtio-access.h
b/include/hw/virtio/virtio-access.h
index ee28c21..cee5dd7 100644
--- a/include/hw/virtio/virtio-access.h
+++ b/include/hw/virtio/virtio-access.h
@@ -32,6 +32,19 @@ static inline bool virtio_access_is_big_endian(VirtIODevice
*vdev)
#endif
}
+static inline bool virtio_legacy_is_cross_endian(VirtIODevice *vdev)
+{
+#ifdef TARGET_IS_BIENDIAN
+#ifdef HOST_WORDS_BIGENDIAN
+ return !virtio_is_big_endian(vdev);
+#else
+ return virtio_is_big_endian(vdev);
+#endif
+#else
+ return false;
+#endif
+}
+
static inline uint16_t virtio_lduw_phys(VirtIODevice *vdev, hwaddr pa)
{
if (virtio_access_is_big_endian(vdev)) {
--
MST
