Re: [kvm-unit-tests PATCH v2 2/7] s390x: smp: Only use smp_cpu_setup once

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On 1/16/20 1:18 PM, David Hildenbrand wrote:
> On 16.01.20 13:05, Janosch Frank wrote:
>> Let's stop and start instead of using setup to run a function on a
>> cpu.
>>
>> Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
>> Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx>
>> Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>
>> ---
>>  s390x/smp.c | 20 +++++++++++++-------
>>  1 file changed, 13 insertions(+), 7 deletions(-)
>>
>> diff --git a/s390x/smp.c b/s390x/smp.c
>> index 02204fd..d430638 100644
>> --- a/s390x/smp.c
>> +++ b/s390x/smp.c
>> @@ -47,7 +47,7 @@ static void test_start(void)
>>  	psw.mask = extract_psw_mask();
>>  	psw.addr = (unsigned long)test_func;
>>  
>> -	smp_cpu_setup(1, psw);
>> +	smp_cpu_start(1, psw);
>>  	wait_for_flag();
>>  	report(1, "start");
>>  }
>> @@ -132,9 +132,8 @@ static void test_ecall(void)
>>  
>>  	report_prefix_push("ecall");
>>  	testflag = 0;
>> -	smp_cpu_destroy(1);
>>  
>> -	smp_cpu_setup(1, psw);
>> +	smp_cpu_start(1, psw);
>>  	wait_for_flag();
>>  	testflag = 0;
>>  	sigp(1, SIGP_EXTERNAL_CALL, 0, NULL);
>> @@ -167,9 +166,8 @@ static void test_emcall(void)
>>  
>>  	report_prefix_push("emcall");
>>  	testflag = 0;
>> -	smp_cpu_destroy(1);
>>  
>> -	smp_cpu_setup(1, psw);
>> +	smp_cpu_start(1, psw);
>>  	wait_for_flag();
>>  	testflag = 0;
>>  	sigp(1, SIGP_EMERGENCY_SIGNAL, 0, NULL);
>> @@ -187,7 +185,7 @@ static void test_reset_initial(void)
>>  	psw.addr = (unsigned long)test_func;
>>  
>>  	report_prefix_push("reset initial");
>> -	smp_cpu_setup(1, psw);
>> +	smp_cpu_start(1, psw);
>>  
>>  	sigp_retry(1, SIGP_INITIAL_CPU_RESET, 0, NULL);
>>  	sigp(1, SIGP_STORE_STATUS_AT_ADDRESS, (uintptr_t)status, NULL);
>> @@ -218,7 +216,7 @@ static void test_reset(void)
>>  	psw.addr = (unsigned long)test_func;
>>  
>>  	report_prefix_push("cpu reset");
>> -	smp_cpu_setup(1, psw);
>> +	smp_cpu_start(1, psw);
>>  
>>  	sigp_retry(1, SIGP_CPU_RESET, 0, NULL);
>>  	report(smp_cpu_stopped(1), "cpu stopped");
>> @@ -227,6 +225,7 @@ static void test_reset(void)
>>  
>>  int main(void)
>>  {
>> +	struct psw psw;
>>  	report_prefix_push("smp");
>>  
>>  	if (smp_query_num_cpus() == 1) {
>> @@ -234,6 +233,12 @@ int main(void)
>>  		goto done;
>>  	}
>>  
>> +	/* Setting up the cpu to give it a stack and lowcore */
>> +	psw.mask = extract_psw_mask();
>> +	psw.addr = (unsigned long)cpu_loop;
>> +	smp_cpu_setup(1, psw);
>> +	smp_cpu_stop(1);
>> +
>>  	test_start();
>>  	test_stop();
>>  	test_stop_store_status();
>> @@ -242,6 +247,7 @@ int main(void)
>>  	test_emcall();
>>  	test_reset();
>>  	test_reset_initial();
>> +	smp_cpu_destroy(1);
>>  
>>  done:
>>  	report_prefix_pop();
>>
> 
> Acked-by: David Hildenbrand <david@xxxxxxxxxx>
Thanks!


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