[Qemu-devel] [PATCH V2 5/5] virtio-blk: set VIRTIO_F_ANY_LAYOUT when 1.0 is supported

[Jason Wang <jasowang@redhat.com>]

Chapter 6.3 of spec said

"
Transitional devices MUST offer, and if offered by the device
transitional drivers MUST accept the following:

VIRTIO_F_ANY_LAYOUT (27)
"

So this patch sets VIRTIO_F_ANY_LAYOUT when 1.0 is supported.

Cc: Stefan Hajnoczi <stefanha@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: qemu-block@nongnu.org
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 hw/block/virtio-blk.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index 4a0ef68..78b1f1e 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -738,6 +738,9 @@ static uint64_t virtio_blk_get_features(VirtIODevice *vdev, uint64_t features,
         }
         virtio_add_feature(&features, VIRTIO_BLK_F_SCSI);
     }
+    if (__virtio_has_feature(features, VIRTIO_F_VERSION_1)) {
+        virtio_add_feature(&features, VIRTIO_F_ANY_LAYOUT);
+    }
 
     if (s->conf.config_wce) {
         virtio_add_feature(&features, VIRTIO_BLK_F_CONFIG_WCE);
-- 
2.1.4