diff options
Diffstat (limited to 'hw/virtio-blk.c')
| -rw-r--r-- | hw/virtio-blk.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c index 552b3b6..97bb4bd 100644 --- a/hw/virtio-blk.c +++ b/hw/virtio-blk.c @@ -510,9 +510,19 @@ static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config) blkcfg.size_max = 0; blkcfg.physical_block_exp = get_physical_block_exp(s->conf); blkcfg.alignment_offset = 0; + blkcfg.wce = bdrv_enable_write_cache(s->bs); memcpy(config, &blkcfg, sizeof(struct virtio_blk_config)); } +static void virtio_blk_set_config(VirtIODevice *vdev, const uint8_t *config) +{ + VirtIOBlock *s = to_virtio_blk(vdev); + struct virtio_blk_config blkcfg; + + memcpy(&blkcfg, config, sizeof(blkcfg)); + bdrv_set_enable_write_cache(s->bs, blkcfg.wce != 0); +} + static uint32_t virtio_blk_get_features(VirtIODevice *vdev, uint32_t features) { VirtIOBlock *s = to_virtio_blk(vdev); @@ -523,9 +533,10 @@ static uint32_t virtio_blk_get_features(VirtIODevice *vdev, uint32_t features) features |= (1 << VIRTIO_BLK_F_BLK_SIZE); features |= (1 << VIRTIO_BLK_F_SCSI); + features |= (1 << VIRTIO_BLK_F_CONFIG_WCE); if (bdrv_enable_write_cache(s->bs)) - features |= (1 << VIRTIO_BLK_F_WCACHE); - + features |= (1 << VIRTIO_BLK_F_WCE); + if (bdrv_is_read_only(s->bs)) features |= 1 << VIRTIO_BLK_F_RO; @@ -610,6 +621,7 @@ VirtIODevice *virtio_blk_init(DeviceState *dev, VirtIOBlkConf *blk) sizeof(VirtIOBlock)); 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.reset = virtio_blk_reset; s->bs = blk->conf.bs; |