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s390x/ais: for 2.10 stable: disable ais facility

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The migration interface for ais was introduced with kernel 4.13
but the capability itself had been active since 4.12. As migration
support is considered necessary lets disable ais in the 2.10
stable version. A proper fix and re-enablement will be done
for qemu 2.11.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <20170921140834.14233-2-borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Christian Borntraeger 2017-09-21 16:08:34 +02:00 committed by Cornelia Huck
parent 0a8066f0c0
commit 3f2d07b3b0
1 changed files with 7 additions and 2 deletions
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9
target/s390x/kvm.c
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@ -311,8 +311,13 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
}
}
/* Try to enable AIS facility */
kvm_vm_enable_cap(s, KVM_CAP_S390_AIS, 0);
/*
* The migration interface for ais was introduced with kernel 4.13
* but the capability itself had been active since 4.12. As migration
* support is considered necessary let's disable ais in the 2.10
* machine.
*/
/* kvm_vm_enable_cap(s, KVM_CAP_S390_AIS, 0); */
qemu_mutex_init(&qemu_sigp_mutex);