From: Christoph Hellwig <h...@lst.de>
Raise a config change interrupt when the size changed. This allows
virtio-blk guest drivers to read-read the information from the
config space once it got the config chaged interrupt.
Signed-off-by: Christoph Hellwig <h...@lst.de>
Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
hw/virtio-blk.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c
index 9f2a9c0..ffac5a4 100644
--- a/hw/virtio-blk.c
+++ b/hw/virtio-blk.c
@@ -514,6 +514,15 @@ static int virtio_blk_load(QEMUFile *f, void *opaque, int
version_id)
return 0;
}
+static void virtio_blk_change_cb(void *opaque, int reason)
+{
+ VirtIOBlock *s = opaque;
+
+ if (reason & CHANGE_SIZE) {
+ virtio_notify_config(&s->vdev);
+ }
+}
+
VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf)
{
VirtIOBlock *s;
@@ -556,6 +565,7 @@ VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf
*conf)
register_savevm(dev, "virtio-blk", virtio_blk_id++, 2,
virtio_blk_save, virtio_blk_load, s);
bdrv_set_removable(s->bs, 0);
+ bdrv_set_change_cb(s->bs, virtio_blk_change_cb, s);
s->bs->buffer_alignment = conf->logical_block_size;
add_boot_device_path(conf->bootindex, dev, "/disk@0,0");
--
1.7.2.3
