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d8d98db5f0
Expose the busids of the virtual I/O subchannel and the virtual CCW
device to ease debugging. This is needed because:
1. subchannel id are assigned dynamically, and cannot be set from
outside.
2. device busid could possibly be auto generated.
An example of using HMP to retrieve the property values of a
virtio-balloon-ccw device looks like:
[root@localhost ~]# lscss -d 0.0.0004
Device Subchan. DevType CU Type Use PIM PAM POM CHPIDs
----------------------------------------------------------------------
0.0.0004 0.0.0003 0000/00 3832/05 yes 80 80 ff 00000000 00000000
(qemu) info qtree
... ...
dev: virtio-balloon-ccw, id "balloon0"
devno = "<unset>"
ioeventfd = true
max_revision = 2 (0x2)
dev_id = "fe.0.0004"
subch_id = "fe.0.0003"
... ...
After migration, if we have the same device that shows up on a
different subchannel, we must re-fill the subch_id of the ccw
device with the new schid, or the subch_id will have an old wrong
schid value. So this also re-fills the subch_id after migration.
While we are at it, also neaten the related error handling a bit.
Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/*
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* Common device infrastructure for devices in the virtual css
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*
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* Copyright 2016 IBM Corp.
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* Author(s): Jing Liu <liujbjl@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#ifndef HW_S390X_CCW_DEVICE_H
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#define HW_S390X_CCW_DEVICE_H
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#include "qom/object.h"
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#include "hw/qdev-core.h"
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#include "hw/s390x/css.h"
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typedef struct CcwDevice {
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DeviceState parent_obj;
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SubchDev *sch;
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/* <cssid>.<ssid>.<device number> */
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/* The user-set busid of the virtual ccw device. */
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CssDevId bus_id;
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/* The actual busid of the virtual ccw device. */
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CssDevId dev_id;
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/* The actual busid of the virtual subchannel. */
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CssDevId subch_id;
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} CcwDevice;
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typedef struct CCWDeviceClass {
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DeviceClass parent_class;
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void (*unplug)(HotplugHandler *, DeviceState *, Error **);
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void (*realize)(CcwDevice *, Error **);
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void (*refill_ids)(CcwDevice *);
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} CCWDeviceClass;
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static inline CcwDevice *to_ccw_dev_fast(DeviceState *d)
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{
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return container_of(d, CcwDevice, parent_obj);
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}
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#define TYPE_CCW_DEVICE "ccw-device"
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#define CCW_DEVICE(obj) OBJECT_CHECK(CcwDevice, (obj), TYPE_CCW_DEVICE)
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#define CCW_DEVICE_GET_CLASS(obj) \
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OBJECT_GET_CLASS(CCWDeviceClass, (obj), TYPE_CCW_DEVICE)
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#define CCW_DEVICE_CLASS(klass) \
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OBJECT_CLASS_CHECK(CCWDeviceClass, (klass), TYPE_CCW_DEVICE)
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#endif
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