Re: [PATCH v9 4/4] s390: ap: kvm: Enable PQAP/AQIC facility for the guest

[Christian Borntraeger]

On 21.05.19 17:34, Pierre Morel wrote:
> AP Queue Interruption Control (AQIC) facility gives
> the guest the possibility to control interruption for
> the Cryptographic Adjunct Processor queues.
> 
> Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
> Reviewed-by: Tony Krowiak <akrowiak@xxxxxxxxxxxxx>
> ---
>  arch/s390/tools/gen_facilities.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/s390/tools/gen_facilities.c b/arch/s390/tools/gen_facilities.c
> index 61ce5b5..aed14fc 100644
> --- a/arch/s390/tools/gen_facilities.c
> +++ b/arch/s390/tools/gen_facilities.c
> @@ -114,6 +114,7 @@ static struct facility_def facility_defs[] = {
>  		.bits = (int[]){
>  			12, /* AP Query Configuration Information */
>  			15, /* AP Facilities Test */
> +			65, /* AP Queue Interruption Control */
>  			156, /* etoken facility */
>  			-1  /* END */
>  		}
> 

I think we should only set stfle.65 if we have the aiv facility (Because we do not
have a GISA otherwise)

So something like this instead?

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 28ebd64..1501cd6 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2461,6 +2461,9 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
                set_kvm_facility(kvm->arch.model.fac_list, 147);
        }
 
+       if (css_general_characteristics.aiv)
+               set_kvm_facility(kvm->arch.model.fac_mask, 65);
+       
        kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid();
        kvm->arch.model.ibc = sclp.ibc & 0x0fff;