Re: [kvm-unit-tests PATCH v2 7/7] s390x: smp: Dirty fpc before initial reset test

[Thomas Huth <thuth@redhat.com>]

On 17/01/2020 11.20, David Hildenbrand wrote:
> On 16.01.20 13:05, Janosch Frank wrote:
>> Let's dirty the fpc, before we test if the initial reset sets it to 0.
>>
>> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
>> Reviewed-by: Thomas Huth <thuth@redhat.com>
>> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
>> ---
>>  s390x/smp.c | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/s390x/smp.c b/s390x/smp.c
>> index ce3215d..97a9dda 100644
>> --- a/s390x/smp.c
>> +++ b/s390x/smp.c
>> @@ -179,6 +179,9 @@ static void test_emcall(void)
>>  /* Used to dirty registers of cpu #1 before it is reset */
>>  static void test_func_initial(void)
>>  {
>> +	asm volatile(
>> +		"	sfpc	%0\n"
>> +		: : "d" (0x11) : );
> 
> FWIW, I'd make this one easier to read
> 
> asm volatile("sfpc %0\n" :: "d" (0x11));

By the way, since it's only one line, you can also drop the \n here.

 Thomas