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virtio-ccw: complete handling of guest-initiated resets 

For a guest-initiated reset, we need to not only reset the virtio device,
but also reset the VirtioCcwDevice into a clean state. This includes
resetting the indicators, or else a guest will not be able to e.g.
switch from classic interrupts to adapter interrupts.

Split off this routine into a new function virtio_ccw_reset_virtio()
to make the distinction between resetting the virtio-related devices
and the base subchannel device clear.

CC: qemu-stable@nongnu.org
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Cornelia Huck 2015-06-23 15:46:31 +02:00
parent d2966f804d
commit fa8b0ca5d1
1 changed files with 22 additions and 17 deletions
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39
hw/s390x/virtio-ccw.c
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@ -296,6 +296,25 @@ static int virtio_ccw_set_vqs(SubchDev *sch, uint64_t addr, uint32_t align,
return 0;
}
static void virtio_ccw_reset_virtio(VirtioCcwDevice *dev, VirtIODevice *vdev)
{
virtio_ccw_stop_ioeventfd(dev);
virtio_reset(vdev);
if (dev->indicators) {
release_indicator(&dev->routes.adapter, dev->indicators);
dev->indicators = NULL;
}
if (dev->indicators2) {
release_indicator(&dev->routes.adapter, dev->indicators2);
dev->indicators2 = NULL;
}
if (dev->summary_indicator) {
release_indicator(&dev->routes.adapter, dev->summary_indicator);
dev->summary_indicator = NULL;
}
dev->sch->thinint_active = false;
}
static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
{
int ret;
@ -359,8 +378,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
}
break;
case CCW_CMD_VDEV_RESET:
virtio_ccw_stop_ioeventfd(dev);
virtio_reset(vdev);
virtio_ccw_reset_virtio(dev, vdev);
ret = 0;
break;
case CCW_CMD_READ_FEAT:
@ -500,7 +518,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
}
if (virtio_set_status(vdev, status) == 0) {
if (vdev->status == 0) {
virtio_reset(vdev);
virtio_ccw_reset_virtio(dev, vdev);
}
if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
virtio_ccw_start_ioeventfd(dev);
@ -1081,21 +1099,8 @@ static void virtio_ccw_reset(DeviceState *d)
VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
virtio_ccw_stop_ioeventfd(dev);
virtio_reset(vdev);
virtio_ccw_reset_virtio(dev, vdev);
css_reset_sch(dev->sch);
if (dev->indicators) {
release_indicator(&dev->routes.adapter, dev->indicators);
dev->indicators = NULL;
}
if (dev->indicators2) {
release_indicator(&dev->routes.adapter, dev->indicators2);
dev->indicators2 = NULL;
}
if (dev->summary_indicator) {
release_indicator(&dev->routes.adapter, dev->summary_indicator);
dev->summary_indicator = NULL;
}
}
static void virtio_ccw_vmstate_change(DeviceState *d, bool running)