vfio-ccw: support async command subregion
A vfio-ccw device may provide an async command subregion for
issuing halt/clear subchannel requests. If it is present, use
it for sending halt/clear request to the device; if not, fall
back to emulation (as done today).
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Message-Id: <20190613092542.2834-1-cohuck@redhat.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
diff --git a/include/hw/s390x/css.h b/include/hw/s390x/css.h
index 7cc183e..d033387 100644
--- a/include/hw/s390x/css.h
+++ b/include/hw/s390x/css.h
@@ -215,6 +215,9 @@
IOInstEnding do_subchannel_work_virtual(SubchDev *sub);
IOInstEnding do_subchannel_work_passthrough(SubchDev *sub);
+int s390_ccw_halt(SubchDev *sch);
+int s390_ccw_clear(SubchDev *sch);
+
typedef enum {
CSS_IO_ADAPTER_VIRTIO = 0,
CSS_IO_ADAPTER_PCI = 1,
