Re: [PATCH v5 01/18] s390x: Use constant for ESA PSW address

[Janosch Frank]

On 2/26/20 2:46 PM, Christian Borntraeger wrote:
> 
> 
> On 26.02.20 13:20, Janosch Frank wrote:
>> Lets make it a bit more clear that we're extracting the 31 bit address
>> from the short psw.
>>
>> Signed-off-by: Janosch Frank <address@hidden>
> 
> 
> 
> PSW_MASK_ESA_MASK and PSW_MASK_ESA_ADDR look pretty similar, but I cant find
> a good name. We could use ~PSW_MASK_ESA_ADDR as an alternative.

I'm also not too happy about it, if there's a better suggestion I'd take
it any day.

> 
> Either way, this makes sense.
> 
> Reviewed-by: Christian Borntraeger <address@hidden>

Thanks!

> 
>> ---
>>  hw/s390x/ipl.c     | 2 +-
>>  target/s390x/cpu.c | 4 ++--
>>  target/s390x/cpu.h | 1 +
>>  3 files changed, 4 insertions(+), 3 deletions(-)
>>
>> diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c
>> index 7773499d7f..42e21e7a6a 100644
>> --- a/hw/s390x/ipl.c
>> +++ b/hw/s390x/ipl.c
>> @@ -179,7 +179,7 @@ static void s390_ipl_realize(DeviceState *dev, Error 
>> **errp)
>>                  /* if not Linux load the address of the (short) IPL PSW */
>>                  ipl_psw = rom_ptr(4, 4);
>>                  if (ipl_psw) {
>> -                    pentry = be32_to_cpu(*ipl_psw) & 0x7fffffffUL;
>> +                    pentry = be32_to_cpu(*ipl_psw) & PSW_MASK_ESA_ADDR;
>>                  } else {
>>                      error_setg(&err, "Could not get IPL PSW");
>>                      goto error;
>> diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c
>> index 8da1905485..43360912a0 100644
>> --- a/target/s390x/cpu.c
>> +++ b/target/s390x/cpu.c
>> @@ -78,13 +78,13 @@ static void s390_cpu_load_normal(CPUState *s)
>>      S390CPU *cpu = S390_CPU(s);
>>      uint64_t spsw = ldq_phys(s->as, 0);
>>  
>> -    cpu->env.psw.mask = spsw & 0xffffffff80000000ULL;
>> +    cpu->env.psw.mask = spsw & PSW_MASK_ESA_MASK;
> 
> 
>>      /*
>>       * Invert short psw indication, so SIE will report a specification
>>       * exception if it was not set.
>>       */
>>      cpu->env.psw.mask ^= PSW_MASK_SHORTPSW;
>> -    cpu->env.psw.addr = spsw & 0x7fffffffULL;
>> +    cpu->env.psw.addr = spsw & PSW_MASK_ESA_ADDR;
>>  
>>      s390_cpu_set_state(S390_CPU_STATE_OPERATING, cpu);
>>  }
>> diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h
>> index 8a557fd8d1..74e66fe0c2 100644
>> --- a/target/s390x/cpu.h
>> +++ b/target/s390x/cpu.h
>> @@ -277,6 +277,7 @@ extern const VMStateDescription vmstate_s390_cpu;
>>  #define PSW_MASK_64             0x0000000100000000ULL
>>  #define PSW_MASK_32             0x0000000080000000ULL
>>  #define PSW_MASK_ESA_ADDR       0x000000007fffffffULL
>> +#define PSW_MASK_ESA_MASK       0xffffffff80000000ULL
>>  
>>  #undef PSW_ASC_PRIMARY
>>  #undef PSW_ASC_ACCREG
>>

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