Re: [PATCH] s390x/cpu_model: disallow unpack for --only-migratable

[David Hildenbrand <david@redhat.com>]

On 25.01.21 13:59, Christian Borntraeger wrote:
> 
> 
> On 25.01.21 13:57, David Hildenbrand wrote:
>> On 25.01.21 13:53, Christian Borntraeger wrote:
>>> secure execution (aka protected virtualization) guests cannot be
>>> migrated at the moment. Disallow the unpack facility if the user
>>> specifies --only-migratable.
>>>
>>> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
>>> ---
>>>  target/s390x/cpu_models.c | 6 ++++++
>>>  1 file changed, 6 insertions(+)
>>>
>>> diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c
>>> index 35179f9dc7ba..0fa082ae2546 100644
>>> --- a/target/s390x/cpu_models.c
>>> +++ b/target/s390x/cpu_models.c
>>> @@ -26,6 +26,7 @@
>>>  #include "qapi/qmp/qdict.h"
>>>  #ifndef CONFIG_USER_ONLY
>>>  #include "sysemu/arch_init.h"
>>> +#include "sysemu/sysemu.h"
>>>  #include "hw/pci/pci.h"
>>>  #endif
>>>  #include "qapi/qapi-commands-machine-target.h"
>>> @@ -878,6 +879,11 @@ static void check_compatibility(const S390CPUModel *max_model,
>>>          return;
>>>      }
>>>  
>>> +    if (only_migratable && test_bit(S390_FEAT_UNPACK, model->features)) {
>>> +        error_setg(errp, "The unpack facility is not compatible with "
>>> +                   "the --only-migratable option");
>>
>> return; ?
> 
> of course.
> 
>>
>>
>> This implies that a VM with "-cpu host" might not start anymore, right?
> 
> Only if --only-migratable is set.
> 

Right, that's what I meant

Reviewed-by: David Hildenbrand <david@redhat.com>

-- 
Thanks,

David / dhildenb