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-rw-r--r--target/s390x/kvm.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
index 720cb1d833..ebb75cafaa 100644
--- a/target/s390x/kvm.c
+++ b/target/s390x/kvm.c
@@ -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);