File 0038-s390x-ais-for-2.10-stable-disable-a.patch of Package qemu

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File 0038-s390x-ais-for-2.10-stable-disable-a.patch of Package qemu (Revision 80d24658c5d1ffd48e6337a269921ac6)

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From 9422f33e1efad3bfbed1feec544a2989f3ce1d9e Mon Sep 17 00:00:00 2001
From: Christian Borntraeger <borntraeger@de.ibm.com>
Date: Thu, 21 Sep 2017 16:08:34 +0200
Subject: [PATCH] s390x/ais: for 2.10 stable: disable ais facility

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>
(cherry picked from commit 3f2d07b3b01ea61126b382633ab4006320923048)
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 target/s390x/kvm.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
index c4c5791d27..eb0dbb338b 100644
--- a/target/s390x/kvm.c
+++ b/target/s390x/kvm.c
@@ -308,8 +308,13 @@ 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);

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File 0038-s390x-ais-for-2.10-stable-disable-a.patch of Package qemu (Revision 80d24658c5d1ffd48e6337a269921ac6)

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