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s390: reset avail and used index on reboot

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reset the guest vring avail/used idx fields, otherwise it's possible
that old values remain in memory which would cause a reboot to fail
with a "Guest moved used index" message

Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Jens Freimann 2012-04-26 09:03:36 +00:00 • committed by Alexander Graf
parent eca3ed0343
commit 4170aea1a7
3 changed files with 23 additions and 1 deletions
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hw/s390-virtio.c
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@ -99,6 +99,7 @@ int s390_virtio_hypercall(CPUS390XState *env, uint64_t mem, uint64_t hypercall)
virtio_reset(dev->vdev);
stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS, 0);
s390_virtio_device_sync(dev);
s390_virtio_reset_idx(dev);
break;
}
case KVM_S390_VIRTIO_SET_STATUS: