Re: [PATCH v8 03/15] s390x: protvirt: Add migration blocker

[Janosch Frank]

On 3/10/20 3:57 PM, David Hildenbrand wrote:
> On 10.03.20 14:39, Janosch Frank wrote:
>> Migration is not yet supported.
>>
>> Signed-off-by: Janosch Frank <address@hidden>
>> ---
>>  hw/s390x/s390-virtio-ccw.c | 17 +++++++++++++++++
>>  1 file changed, 17 insertions(+)
>>
>> diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
>> index 455ad31718..1ceb42c0b5 100644
>> --- a/hw/s390x/s390-virtio-ccw.c
>> +++ b/hw/s390x/s390-virtio-ccw.c
>> @@ -43,6 +43,9 @@
>>  #include "sysemu/sysemu.h"
>>  #include "hw/s390x/pv.h"
>>  #include <linux/kvm.h>
>> +#include "migration/blocker.h"
>> +
>> +static Error *pv_mig_blocker;
>>  
>>  S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
>>  {
>> @@ -323,15 +326,29 @@ static void s390_machine_unprotect(S390CcwMachineState 
>> *ms)
>>  
>>      s390_pv_vm_disable();
>>      ms->pv = false;
>> +    migrate_del_blocker(pv_mig_blocker);
>> +    error_free_or_abort(&pv_mig_blocker);
>>  }
>>  
>>  static int s390_machine_protect(S390CcwMachineState *ms)
>>  {
>> +    static Error *local_err;
> 
> You have to initialize it to NULL.

That's a static variable, am I missing something?

> 
>>      int rc;
>>  
>> +    error_setg(&pv_mig_blocker,
>> +               "protected VMs are currently not migrateable.");
>> +    rc = migrate_add_blocker(pv_mig_blocker, &local_err);
>> +    if (local_err) {
>> +        error_report_err(local_err);
>> +        error_free_or_abort(&pv_mig_blocker);
>> +        return rc;
>> +    }
>> +
>>      /* Create SE VM */
>>      rc = s390_pv_vm_enable();
>>      if (rc) {
>> +        error_report_err(local_err);
>> +        error_free_or_abort(&pv_mig_blocker);
> 
> Actually, migrate_del_blocker(pv_mig_blocker) as well, no?
> 

Ack

>>          return rc;
>>      }
>>  
>>
> 
>

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