From 77ae0b2a6e731ab7b97e9fae401c579397edb31c Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Mon, 4 May 2015 15:27:25 +0200 Subject: [PATCH] s390-virtio: clear {used,avail}_event_idx on reset as well 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 Signed-off-by: Cornelia Huck --- hw/s390x/s390-virtio-bus.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/hw/s390x/s390-virtio-bus.c b/hw/s390x/s390-virtio-bus.c index 4a33c6a409..4f69cbbb70 100644 --- a/hw/s390x/s390-virtio-bus.c +++ b/hw/s390x/s390-virtio-bus.c @@ -77,10 +77,18 @@ void s390_virtio_reset_idx(VirtIOS390Device *dev) VIRTIO_VRING_AVAIL_IDX_OFFS; address_space_stw(&address_space_memory, idx_addr, 0, 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) + VIRTIO_VRING_USED_IDX_OFFS; address_space_stw(&address_space_memory, idx_addr, 0, 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); } }