linux-kernel - Re: [PATCH v14 3/6] KVM: s390: pv: add KVM_CAP_S390_PROTECTED_ASYNC

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Date:   Mon, 10 Oct 2022 13:45:54 +0200
From:   Janosch Frank <frankja@...ux.ibm.com>
To:     Claudio Imbrenda <imbrenda@...ux.ibm.com>, kvm@...r.kernel.org
Cc:     borntraeger@...ibm.com, thuth@...hat.com, david@...hat.com,
        linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        scgl@...ux.ibm.com, seiden@...ux.ibm.com, nrb@...ux.ibm.com
Subject: Re: [PATCH v14 3/6] KVM: s390: pv: add
 KVM_CAP_S390_PROTECTED_ASYNC_DISABLE

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@...ux.ibm.com>
> Reviewed-by: Nico Boehr <nrb@...ux.ibm.com>
> ---
>   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

I can see 223 in Paolo's next, is there a 224 that I've missed?


>   
>   #ifdef KVM_CAP_IRQ_ROUTING
>