diff options
| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2017-09-28 15:18:31 +0200 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2017-10-06 10:53:02 +0200 |
| commit | c1843e20924c9f79c8233ea34db31f3ae2a74677 (patch) | |
| tree | 0bb17b84c3154b43a208f53a1461b0ff1230f5fe /hw | |
| parent | 8eb82de91b013c0a566c5b79400dde41689129cb (diff) | |
Revert "s390x/ccw: create s390 phb conditionally"
This reverts commit d32bd032d8fde41281aae34c16a4aa97e9acfeac.
Turns out that old QEMUs always created a pci host bridge
and for many CPU models the migration from old QEMUs to new
QEMUs will fail with
qemu-system-s390x: Unknown savevm section or instance 'PCIBUS' 0
qemu-system-s390x: load of migration failed: Invalid argument
As a quick fix we will revert the commit and always create the
pci host bridge.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
[fixed revert to keep the comment fixup, added a comment in the code]
Cc: Cornelia Huck <cohuck@redhat.com>
Cc: David Hildenbrand <david@redhat.com>
Message-Id: <20170928131831.81393-1-borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/s390x/s390-virtio-ccw.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index 1bcb7000ab..2c689d50bc 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -251,6 +251,7 @@ static void ccw_init(MachineState *machine) { int ret; VirtualCssBus *css_bus; + DeviceState *dev; s390_sclp_init(); s390_memory_init(machine->ram_size); @@ -266,13 +267,14 @@ static void ccw_init(MachineState *machine) machine->initrd_filename, "s390-ccw.img", "s390-netboot.img", true); - if (s390_has_feat(S390_FEAT_ZPCI)) { - DeviceState *dev = qdev_create(NULL, TYPE_S390_PCI_HOST_BRIDGE); - object_property_add_child(qdev_get_machine(), - TYPE_S390_PCI_HOST_BRIDGE, - OBJECT(dev), NULL); - qdev_init_nofail(dev); - } + /* + * We cannot easily make the pci host bridge conditional as older QEMUs + * always created it. Doing so would break migration across QEMU versions. + */ + dev = qdev_create(NULL, TYPE_S390_PCI_HOST_BRIDGE); + object_property_add_child(qdev_get_machine(), TYPE_S390_PCI_HOST_BRIDGE, + OBJECT(dev), NULL); + qdev_init_nofail(dev); /* register hypercalls */ virtio_ccw_register_hcalls(); |