linux-kernel - Re: [PATCH v1 2/2] s390: vfio-ap: setup APCB mask using KVM dedicated function

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Message-ID: <dee76108-8249-a9ac-ea39-28e22ebe22ad@redhat.com>
Date:   Fri, 5 Oct 2018 11:42:55 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Pierre Morel <pmorel@...ux.ibm.com>, borntraeger@...ibm.com
Cc:     linux-kernel@...r.kernel.org, cohuck@...hat.com,
        linux-s390@...r.kernel.org, kvm@...r.kernel.org,
        frankja@...ux.ibm.com, akrowiak@...ux.ibm.com, pasic@...ux.ibm.com
Subject: Re: [PATCH v1 2/2] s390: vfio-ap: setup APCB mask using KVM dedicated
 function

On 05/10/2018 10:31, Pierre Morel wrote:
> We replace the vfio_ap_mdev_copy_masks() by the new
> kvm_arch_crypto_set_masks() to be able to use the standard
> KVM tracing system.
> 
> Signed-off-by: Pierre Morel <pmorel@...ux.ibm.com>
> ---
>  drivers/s390/crypto/vfio_ap_ops.c | 33 +++------------------------------
>  1 file changed, 3 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
> index a8a9984..f297779 100644
> --- a/drivers/s390/crypto/vfio_ap_ops.c
> +++ b/drivers/s390/crypto/vfio_ap_ops.c
> @@ -726,35 +726,6 @@ static const struct attribute_group *vfio_ap_mdev_attr_groups[] = {
>  	NULL
>  };
>  
> -static void vfio_ap_mdev_copy_masks(struct ap_matrix_mdev *matrix_mdev)
> -{
> -	int nbytes;
> -	unsigned long *apm, *aqm, *adm;
> -	struct kvm_s390_crypto_cb *crycb = matrix_mdev->kvm->arch.crypto.crycb;
> -
> -	switch (matrix_mdev->kvm->arch.crypto.crycbd & CRYCB_FORMAT_MASK) {
> -	case CRYCB_FORMAT2:
> -		apm = (unsigned long *)crycb->apcb1.apm;
> -		aqm = (unsigned long *)crycb->apcb1.aqm;
> -		adm = (unsigned long *)crycb->apcb1.adm;
> -		break;
> -	case CRYCB_FORMAT1:
> -	case CRYCB_FORMAT0:
> -	default:
> -		apm = (unsigned long *)crycb->apcb0.apm;
> -		aqm = (unsigned long *)crycb->apcb0.aqm;
> -		adm = (unsigned long *)crycb->apcb0.adm;
> -		break;
> -	}
> -
> -	nbytes = DIV_ROUND_UP(matrix_mdev->matrix.apm_max + 1, BITS_PER_BYTE);
> -	memcpy(apm, matrix_mdev->matrix.apm, nbytes);
> -	nbytes = DIV_ROUND_UP(matrix_mdev->matrix.aqm_max + 1, BITS_PER_BYTE);
> -	memcpy(aqm, matrix_mdev->matrix.aqm, nbytes);
> -	nbytes = DIV_ROUND_UP(matrix_mdev->matrix.adm_max + 1, BITS_PER_BYTE);
> -	memcpy(adm, matrix_mdev->matrix.adm, nbytes);
> -}
> -
>  /**
>   * vfio_ap_mdev_set_kvm
>   *
> @@ -811,7 +782,9 @@ static int vfio_ap_mdev_group_notifier(struct notifier_block *nb,
>  	if (!matrix_mdev->kvm->arch.crypto.crycbd)
>  		return NOTIFY_DONE;
>  
> -	vfio_ap_mdev_copy_masks(matrix_mdev);
> +	kvm_arch_crypto_set_masks(matrix_mdev->kvm, matrix_mdev->matrix.apm,
> +				  matrix_mdev->matrix.aqm,
> +				  matrix_mdev->matrix.adm);
>  
>  	return NOTIFY_OK;
>  }
> 

Reviewed-by: David Hildenbrand <david@...hat.com>

-- 

Thanks,

David / dhildenb