On Tue, 21 May 2019 16:50:47 -0400
Farhan Ali <address@hidden> wrote:
On 05/07/2019 11:47 AM, Cornelia Huck wrote:
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).
Signed-off-by: Cornelia Huck <address@hidden>
---
hw/s390x/css.c | 27 +++++++--
hw/vfio/ccw.c | 110 +++++++++++++++++++++++++++++++++++-
include/hw/s390x/s390-ccw.h | 3 +
3 files changed, 134 insertions(+), 6 deletions(-)
diff --git a/include/hw/s390x/s390-ccw.h b/include/hw/s390x/s390-ccw.h
index 901d805d79a3..e9c7e1db5761 100644
--- a/include/hw/s390x/s390-ccw.h
+++ b/include/hw/s390x/s390-ccw.h
@@ -37,4 +37,7 @@ typedef struct S390CCWDeviceClass {
IOInstEnding (*handle_request) (SubchDev *sch);
} S390CCWDeviceClass;
+int vfio_ccw_handle_clear(SubchDev *sch);
+int vfio_ccw_handle_halt(SubchDev *sch);
+
We are not making clear and halt functions part of the
S390CCWDeviceClass, is there are reason for doing this?
Currently we handle ssch through the handle_request function, it just
looks a little inconsistent.
I don't quite remember why I did it this way; not sure if there is a
good reason for that (that patch has been around for too long...)
We can change such internal details later on, though. (And I think your
comment has merit.)