diff options
| -rw-r--r-- | hw/virtio-blk.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c index 97bb4bdc7c..fd8fa90792 100644 --- a/hw/virtio-blk.c +++ b/hw/virtio-blk.c @@ -543,6 +543,19 @@ static uint32_t virtio_blk_get_features(VirtIODevice *vdev, uint32_t features) return features; } +static void virtio_blk_set_status(VirtIODevice *vdev, uint8_t status) +{ + VirtIOBlock *s = to_virtio_blk(vdev); + uint32_t features; + + if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { + return; + } + + features = vdev->guest_features; + bdrv_set_enable_write_cache(s->bs, !!(features & (1 << VIRTIO_BLK_F_WCE))); +} + static void virtio_blk_save(QEMUFile *f, void *opaque) { VirtIOBlock *s = opaque; @@ -623,6 +636,7 @@ VirtIODevice *virtio_blk_init(DeviceState *dev, VirtIOBlkConf *blk) s->vdev.get_config = virtio_blk_update_config; s->vdev.set_config = virtio_blk_set_config; s->vdev.get_features = virtio_blk_get_features; + s->vdev.set_status = virtio_blk_set_status; s->vdev.reset = virtio_blk_reset; s->bs = blk->conf.bs; s->conf = &blk->conf; |