diff options
| author |   Cornelia Huck <cohuck@redhat.com> | 2018-07-23 16:03:27 +0200 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2019-04-24 14:18:51 +0200 |
| commit | d5afd5d135c8cc43bd2568361b4c91f0bd488c3f (patch) | |
| tree | 89ed16e6dba457f7fe6f4aeb3aadff90535fb975 /drivers/s390/cio/vfio_ccw_ops.c | |
| parent | s390/cio: export hsch to modules (diff) | |
| download | linux-dev-d5afd5d135c8cc43bd2568361b4c91f0bd488c3f.tar.xz linux-dev-d5afd5d135c8cc43bd2568361b4c91f0bd488c3f.zip | |
vfio-ccw: add handling for async channel instructions
Add a region to the vfio-ccw device that can be used to submit
asynchronous I/O instructions. ssch continues to be handled by the
existing I/O region; the new region handles hsch and csch.
Interrupt status continues to be reported through the same channels
as for ssch.
Acked-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'drivers/s390/cio/vfio_ccw_ops.c')
| -rw-r--r-- | drivers/s390/cio/vfio_ccw_ops.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c index 5b989faa011f..3e2802a4a43d 100644 --- a/drivers/s390/cio/vfio_ccw_ops.c +++ b/drivers/s390/cio/vfio_ccw_ops.c @@ -150,11 +150,20 @@ static int vfio_ccw_mdev_open(struct mdev_device *mdev) struct vfio_ccw_private *private = dev_get_drvdata(mdev_parent_dev(mdev)); unsigned long events = VFIO_IOMMU_NOTIFY_DMA_UNMAP; + int ret; private->nb.notifier_call = vfio_ccw_mdev_notifier; - return vfio_register_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY, - &events, &private->nb); + ret = vfio_register_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY, + &events, &private->nb); + if (ret) + return ret; + + ret = vfio_ccw_register_async_dev_regions(private); + if (ret) + vfio_unregister_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY, + &private->nb); + return ret; } static void vfio_ccw_mdev_release(struct mdev_device *mdev) |