tree 87d6be1ed35f1d12f0da33cc88a533bc0fd1afd9
parent 84ec96a6150477b9509664557bc6ad4eaa21f72a
author Cornelia Huck <cornelia.huck@de.ibm.com> 1360142619 +0100
committer Christian Borntraeger <borntraeger@de.ibm.com> 1393926064 +0100

virtio-ccw: virtio-ccw adapter interrupt support.

Implement the new CCW_CMD_SET_IND_ADAPTER command and try to enable
adapter interrupts for every device on the first startup. If the host
does not support adapter interrupts, fall back to normal I/O interrupts.

virtio-ccw adapter interrupts use the same isc as normal I/O subchannels
and share a summary indicator for all devices sharing the same indicator
area.

Indicator bits for the individual virtqueues may be contained in the same
indicator area for different devices.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>