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,
diff --git a/include/hw/s390x/s390-ccw.h b/include/hw/s390x/s390-ccw.h
index 901d805..fffb545 100644
--- a/include/hw/s390x/s390-ccw.h
+++ b/include/hw/s390x/s390-ccw.h
@@ -35,6 +35,8 @@
void (*realize)(S390CCWDevice *dev, char *sysfsdev, Error **errp);
void (*unrealize)(S390CCWDevice *dev, Error **errp);
IOInstEnding (*handle_request) (SubchDev *sch);
+ int (*handle_halt) (SubchDev *sch);
+ int (*handle_clear) (SubchDev *sch);
} S390CCWDeviceClass;
#endif
