linux-kernel - Re: [PATCH v4 08/10] KVM: s390: Add capability for storage key extension of MEM

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Date:   Mon, 14 Feb 2022 18:47:56 +0100
From:   Claudio Imbrenda <imbrenda@...ux.ibm.com>
To:     Janis Schoetterl-Glausch <scgl@...ux.ibm.com>
Cc:     Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        David Hildenbrand <david@...hat.com>,
        Jonathan Corbet <corbet@....net>, kvm@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-s390@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>
Subject: Re: [PATCH v4 08/10] KVM: s390: Add capability for storage key
 extension of MEM_OP IOCTL

On Fri, 11 Feb 2022 19:22:13 +0100
Janis Schoetterl-Glausch <scgl@...ux.ibm.com> wrote:

> Availability of the KVM_CAP_S390_MEM_OP_EXTENSION capability signals that:
> * The vcpu MEM_OP IOCTL supports storage key checking.
> * The vm MEM_OP IOCTL exists.
> 
> Signed-off-by: Janis Schoetterl-Glausch <scgl@...ux.ibm.com>
> Reviewed-by: Janosch Frank <frankja@...ux.ibm.com>

Reviewed-by: Claudio Imbrenda <imbrenda@...ux.ibm.com>

> ---
>  arch/s390/kvm/kvm-s390.c | 1 +
>  include/uapi/linux/kvm.h | 1 +
>  2 files changed, 2 insertions(+)
> 
> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
> index 773bccdd446c..c2c26c2aad64 100644
> --- a/arch/s390/kvm/kvm-s390.c
> +++ b/arch/s390/kvm/kvm-s390.c
> @@ -564,6 +564,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
>  	case KVM_CAP_S390_VCPU_RESETS:
>  	case KVM_CAP_SET_GUEST_DEBUG:
>  	case KVM_CAP_S390_DIAG318:
> +	case KVM_CAP_S390_MEM_OP_EXTENSION:
>  		r = 1;
>  		break;
>  	case KVM_CAP_SET_GUEST_DEBUG2:
> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
> index 4bc7623def87..08756eeea065 100644
> --- a/include/uapi/linux/kvm.h
> +++ b/include/uapi/linux/kvm.h
> @@ -1140,6 +1140,7 @@ struct kvm_ppc_resize_hpt {
>  #define KVM_CAP_VM_GPA_BITS 207
>  #define KVM_CAP_XSAVE2 208
>  #define KVM_CAP_SYS_ATTRIBUTES 209
> +#define KVM_CAP_S390_MEM_OP_EXTENSION 210
>  
>  #ifdef KVM_CAP_IRQ_ROUTING
>