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We need to implement the get_dev_path method for the css bus, or else we might end up with two different devices having the same qdev_path. This was noticed when adding two scsi_hd controllers: The SCSIBus code will produce a non-unique dev_path for vmstate usage if the parent bus does not provide the get_dev_path method. We simply use the device's bus id, as this is unique and we won't have any deeper hierarchy from a channel subsystem perspective anyway. Note that we need to disable this for older machine versions, as this changes the migration format. Reported-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com> Reviewed-by: Sascha Silbe <silbe@linux.vnet.ibm.com> Tested-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
39 lines
1 KiB
C
39 lines
1 KiB
C
/*
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* virtual css bridge definition
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*
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* Copyright 2012,2016 IBM Corp.
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* Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
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* Pierre Morel <pmorel@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_CSS_BRIDGE_H
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#define HW_S390X_CSS_BRIDGE_H
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#include "qom/object.h"
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#include "hw/qdev-core.h"
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/* virtual css bridge */
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typedef struct VirtualCssBridge {
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SysBusDevice sysbus_dev;
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bool css_dev_path;
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} VirtualCssBridge;
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#define TYPE_VIRTUAL_CSS_BRIDGE "virtual-css-bridge"
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#define VIRTUAL_CSS_BRIDGE(obj) \
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OBJECT_CHECK(VirtualCssBridge, (obj), TYPE_VIRTUAL_CSS_BRIDGE)
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/* virtual css bus type */
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typedef struct VirtualCssBus {
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BusState parent_obj;
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} VirtualCssBus;
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#define TYPE_VIRTUAL_CSS_BUS "virtual-css-bus"
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#define VIRTUAL_CSS_BUS(obj) \
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OBJECT_CHECK(VirtualCssBus, (obj), TYPE_VIRTUAL_CSS_BUS)
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VirtualCssBus *virtual_css_bus_init(void);
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#endif
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