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s390-virtio: clear {used,avail}_event_idx on reset as well

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The old s390-virtio transport clears the vring used/avail indices in
the shared area on reset. When we enabled event_idx for virtio-blk, we
noticed that this is not enough: We also need to clear the published
used/avail event indices, or reboot will fail.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Christian Borntraeger 2015-05-04 15:27:25 +02:00 committed by Cornelia Huck
parent f50616a81b
commit 77ae0b2a6e
1 changed files with 8 additions and 0 deletions
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8
hw/s390x/s390-virtio-bus.c
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@ -77,10 +77,18 @@ void s390_virtio_reset_idx(VirtIOS390Device *dev)
VIRTIO_VRING_AVAIL_IDX_OFFS; VIRTIO_VRING_AVAIL_IDX_OFFS;
address_space_stw(&address_space_memory, idx_addr, 0, address_space_stw(&address_space_memory, idx_addr, 0,
MEMTXATTRS_UNSPECIFIED, NULL); MEMTXATTRS_UNSPECIFIED, NULL);
idx_addr = virtio_queue_get_avail_addr(dev->vdev, i) +
virtio_queue_get_avail_size(dev->vdev, i);
address_space_stw(&address_space_memory, idx_addr, 0,
MEMTXATTRS_UNSPECIFIED, NULL);
idx_addr = virtio_queue_get_used_addr(dev->vdev, i) + idx_addr = virtio_queue_get_used_addr(dev->vdev, i) +
VIRTIO_VRING_USED_IDX_OFFS; VIRTIO_VRING_USED_IDX_OFFS;
address_space_stw(&address_space_memory, idx_addr, 0, address_space_stw(&address_space_memory, idx_addr, 0,
MEMTXATTRS_UNSPECIFIED, NULL); MEMTXATTRS_UNSPECIFIED, NULL);
idx_addr = virtio_queue_get_used_addr(dev->vdev, i) +
virtio_queue_get_used_size(dev->vdev, i);
address_space_stw(&address_space_memory, idx_addr, 0,
MEMTXATTRS_UNSPECIFIED, NULL);
} }
} }