Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH v2 13/15] KVM: s390: Configure the guest's CRYCB
To:     Tony Krowiak <akrowiak@linux.vnet.ibm.com>,
        linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org,
        kvm@vger.kernel.org
Cc:     freude@de.ibm.com, schwidefsky@de.ibm.com,
        heiko.carstens@de.ibm.com, borntraeger@de.ibm.com,
        cohuck@redhat.com, kwankhede@nvidia.com,
        bjsdjshi@linux.vnet.ibm.com, pbonzini@redhat.com,
        alex.williamson@redhat.com, pmorel@linux.vnet.ibm.com,
        alifm@linux.vnet.ibm.com, mjrosato@linux.vnet.ibm.com,
        jjherne@linux.vnet.ibm.com, thuth@redhat.com,
        pasic@linux.vnet.ibm.com, fiuczy@linux.vnet.ibm.com,
        buendgen@de.ibm.com
References: <1519741693-17440-1-git-send-email-akrowiak@linux.vnet.ibm.com>
 <1519741693-17440-14-git-send-email-akrowiak@linux.vnet.ibm.com>
From:   David Hildenbrand <david@redhat.com>
Organization: Red Hat GmbH
Message-ID: <99b24fc7-3df9-6620-d1df-917214fbdda2@redhat.com>
Date:   Wed, 28 Feb 2018 10:49:34 +0100
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
 Thunderbird/52.5.2
MIME-Version: 1.0
In-Reply-To: <1519741693-17440-14-git-send-email-akrowiak@linux.vnet.ibm.com>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk


> +static int vfio_ap_mdev_open(struct mdev_device *mdev)
> +{
> +	struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev);
> +	unsigned long events;
> +	int ret;
> +
> +	matrix_mdev->group_notifier.notifier_call = vfio_ap_mdev_group_notifier;
> +	events = VFIO_GROUP_NOTIFY_SET_KVM;
> +	ret = vfio_register_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY,
> +				     &events, &matrix_mdev->group_notifier);
> +
> +	ret = kvm_ap_configure_matrix(matrix_mdev->kvm,
> +				      matrix_mdev->matrix);
> +	if (ret)
> +		return ret;
> +
> +	ret = kvm_ap_enable_ie_mode(matrix_mdev->kvm);

Can't this happen while the guest is already running? Or what hinders us
from doing that?

> +
> +	return ret;
> +}
> +
> +static void vfio_ap_mdev_release(struct mdev_device *mdev)

Thanks,

David / dhildenb