Re: [PATCH v14 3/6] KVM: s390: pv: add KVM_CAP_S390_PROTECTED_ASYNC_DISABLE

[Steffen Eiden]

On 9/30/22 16:01, Claudio Imbrenda wrote:
> Add KVM_CAP_S390_PROTECTED_ASYNC_DISABLE to signal that the
> KVM_PV_ASYNC_DISABLE and KVM_PV_ASYNC_DISABLE_PREPARE commands for the
> KVM_S390_PV_COMMAND ioctl are available.
>
> Signed-off-by: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
> Reviewed-by: Nico Boehr <nrb@xxxxxxxxxxxxx>
LGTM.

Reviewed-by: Steffen Eiden <seiden@xxxxxxxxxxxxx>

> ---
>   arch/s390/kvm/kvm-s390.c | 3 +++
>   include/uapi/linux/kvm.h | 1 +
>   2 files changed, 4 insertions(+)
>
> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
> index d0027964a6f5..7a3bd68efd85 100644
> --- a/arch/s390/kvm/kvm-s390.c
> +++ b/arch/s390/kvm/kvm-s390.c
> @@ -618,6 +618,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
>   	case KVM_CAP_S390_BPB:
>   		r = test_facility(82);
>   		break;
> +	case KVM_CAP_S390_PROTECTED_ASYNC_DISABLE:
> +		r = async_destroy && is_prot_virt_host();
> +		break;
>   	case KVM_CAP_S390_PROTECTED:
>   		r = is_prot_virt_host();
>   		break;
> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
> index 02602c5c1975..9afe0084b2c5 100644
> --- a/include/uapi/linux/kvm.h
> +++ b/include/uapi/linux/kvm.h
> @@ -1177,6 +1177,7 @@ struct kvm_ppc_resize_hpt {
>   #define KVM_CAP_VM_DISABLE_NX_HUGE_PAGES 220
>   #define KVM_CAP_S390_ZPCI_OP 221
>   #define KVM_CAP_S390_CPU_TOPOLOGY 222
> +#define KVM_CAP_S390_PROTECTED_ASYNC_DISABLE 225
>   
>   #ifdef KVM_CAP_IRQ_ROUTING
>