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Re: [Qemu-devel] [PATCH 1/1] s390x/ais: for 2.10 stable: disable ais fac
From: |
Cornelia Huck |
Subject: |
Re: [Qemu-devel] [PATCH 1/1] s390x/ais: for 2.10 stable: disable ais facility |
Date: |
Thu, 21 Sep 2017 17:21:42 +0200 |
On Thu, 21 Sep 2017 17:14:46 +0200
Christian Borntraeger <address@hidden> wrote:
> 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.
Also now with qemu-devel on cc:
So, should I apply to s390-next? Or can this be applied just to stable?
>
> Signed-off-by: Christian Borntraeger <address@hidden>
> Reviewed-by: Cornelia Huck <address@hidden>
> ---
> 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 c4c5791..eb0dbb3 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);
>