Re: [PATCH v3] s390x: smp: Test all CRs on initial reset

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On 24.04.20 11:33, Janosch Frank wrote:
> All CRs are set to 0 and CRs 0 and 14 are set to pre-defined values,
> so we also need to test 1-13 and 15 for 0.
> 
> And while we're at it, let's also set some values to cr 1, 7 and 13, so
> we can actually be sure that they will be zeroed.
> 
> Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
> Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>
> Reviewed-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
> ---
>  s390x/smp.c | 18 +++++++++++++++++-
>  1 file changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/s390x/smp.c b/s390x/smp.c
> index fa40753..7144c9b 100644
> --- a/s390x/smp.c
> +++ b/s390x/smp.c
> @@ -182,16 +182,28 @@ static void test_emcall(void)
>  	report_prefix_pop();
>  }
>  
> +/* Used to dirty registers of cpu #1 before it is reset */
> +static void test_func_initial(void)
> +{
> +	lctlg(1, 0x42000UL);
> +	lctlg(7, 0x43000UL);
> +	lctlg(13, 0x44000UL);
> +	set_flag(1);
> +}
> +
>  static void test_reset_initial(void)
>  {
>  	struct cpu_status *status = alloc_pages(0);
>  	struct psw psw;
> +	int i;
>  
>  	psw.mask = extract_psw_mask();
> -	psw.addr = (unsigned long)test_func;
> +	psw.addr = (unsigned long)test_func_initial;
>  
>  	report_prefix_push("reset initial");
> +	set_flag(0);
>  	smp_cpu_start(1, psw);
> +	wait_for_flag();
>  
>  	sigp_retry(1, SIGP_INITIAL_CPU_RESET, 0, NULL);
>  	sigp(1, SIGP_STORE_STATUS_AT_ADDRESS, (uintptr_t)status, NULL);
> @@ -202,6 +214,10 @@ static void test_reset_initial(void)
>  	report(!status->fpc, "fpc");
>  	report(!status->cputm, "cpu timer");
>  	report(!status->todpr, "todpr");
> +	for (i = 1; i <= 13; i++) {
> +		report(status->crs[i] == 0, "cr%d == 0", i);
> +	}
> +	report(status->crs[15] == 0, "cr15 == 0");
>  	report_prefix_pop();
>  
>  	report_prefix_push("initialized");
> 

Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>

Queued to

https://github.com/davidhildenbrand/kvm-unit-tests.git s390x-next

thanks!

-- 
Thanks,

David / dhildenb





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