Re: [PATCH v6 03/18] s390x: protvirt: Support unpack facility

[Janosch Frank]

On 3/6/20 12:48 PM, Christian Borntraeger wrote:
> 
> 
> On 04.03.20 12:42, Janosch Frank wrote:
> [...]
>> diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c
>> index 3dd396e870..69b1cc5dfc 100644
>> --- a/target/s390x/cpu.c
>> +++ b/target/s390x/cpu.c
>> @@ -37,6 +37,8 @@
>>  #include "sysemu/hw_accel.h"
>>  #include "hw/qdev-properties.h"
>>  #ifndef CONFIG_USER_ONLY
>> +#include "hw/s390x/s390-virtio-ccw.h"
>> +#include "hw/s390x/pv.h"
>>  #include "hw/boards.h"
>>  #include "sysemu/arch_init.h"
>>  #include "sysemu/sysemu.h"
>> @@ -191,6 +193,7 @@ static void s390_cpu_realizefn(DeviceState *dev, Error 
>> **errp)
>>  
>>  #if !defined(CONFIG_USER_ONLY)
>>      MachineState *ms = MACHINE(qdev_get_machine());
>> +    S390CcwMachineState *ccw = S390_CCW_MACHINE(ms);
>>      unsigned int max_cpus = ms->smp.max_cpus;
>>      if (cpu->env.core_id >= max_cpus) {
>>          error_setg(&err, "Unable to add CPU with core-id: %" PRIu32
> 
> I messed this up and this can break for the none machine.
> 
> Something like this on top:

Christian and I found out that we also need to fence CONFIG_USER_ONLY,
so machine_is_pv is now in an ifdef and I squashed the changes into the
support unpack facility patch.

CI is now happy again ;-)


> 
> 
> 
> diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c
> index 7840e784f1..1b42b0fa25 100644
> --- a/target/s390x/cpu.c
> +++ b/target/s390x/cpu.c
> @@ -181,6 +181,18 @@ static void s390_cpu_disas_set_info(CPUState *cpu, 
> disassemble_info *info)
>      info->print_insn = print_insn_s390;
>  }
>  
> +static bool machine_is_pv(MachineState *ms)
> +{
> +    Object *obj;
> +
> +    /* we have to bail out for the "none" machine */
> +    obj = object_dynamic_cast(OBJECT(ms), TYPE_S390_CCW_MACHINE);
> +     if (!obj) {
> +        return false;
> +    }
> +    return S390_CCW_MACHINE(obj)->pv;
> +}
> +
>  static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
>  {
>      CPUState *cs = CPU(dev);
> @@ -198,7 +210,6 @@ static void s390_cpu_realizefn(DeviceState *dev, Error 
> **errp)
>  
>  #if !defined(CONFIG_USER_ONLY)
>      MachineState *ms = MACHINE(qdev_get_machine());
> -    S390CcwMachineState *ccw = S390_CCW_MACHINE(ms);
>      unsigned int max_cpus = ms->smp.max_cpus;
>      if (cpu->env.core_id >= max_cpus) {
>          error_setg(&err, "Unable to add CPU with core-id: %" PRIu32
> @@ -213,7 +224,7 @@ static void s390_cpu_realizefn(DeviceState *dev, Error 
> **errp)
>          goto out;
>      }
>  
> -    cpu->env.pv = ccw->pv;
> +    cpu->env.pv = machine_is_pv(ms);
>      /* sync cs->cpu_index and env->core_id. The latter is needed for TCG. */
>      cs->cpu_index = cpu->env.core_id;
>  #endif
> 
>

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