Commit e5051fc7 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Kevin Wolf
Browse files

virtio-blk: tell the guest about size changes

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: default avatarChristoph Hellwig <>
Signed-off-by: default avatarKevin Wolf <>
parent db97ee6a
......@@ -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) {
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");
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