From: Tony Krowiak <akrowiak@linux.ibm.com>
To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org
Cc: jjherne@linux.ibm.com, freude@linux.ibm.com,
borntraeger@de.ibm.com, cohuck@redhat.com,
mjrosato@linux.ibm.com, pasic@linux.ibm.com,
alex.williamson@redhat.com, kwankhede@nvidia.com,
fiuczy@linux.ibm.com, Tony Krowiak <akrowiak@linux.ibm.com>
Subject: [PATCH v17 05/15] s390/vfio-ap: introduce shadow APCB
Date: Thu, 21 Oct 2021 11:23:22 -0400 [thread overview]
Message-ID: <20211021152332.70455-6-akrowiak@linux.ibm.com> (raw)
In-Reply-To: <20211021152332.70455-1-akrowiak@linux.ibm.com>
The APCB is a field within the CRYCB that provides the AP configuration
to a KVM guest. Let's introduce a shadow copy of the KVM guest's APCB and
maintain it for the lifespan of the guest.
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
---
drivers/s390/crypto/vfio_ap_ops.c | 10 ++++++----
drivers/s390/crypto/vfio_ap_private.h | 2 ++
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
index e2be29e9d310..4305177029bf 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -332,6 +332,7 @@ static int vfio_ap_mdev_probe(struct mdev_device *mdev)
matrix_mdev->mdev = mdev;
vfio_ap_matrix_init(&matrix_dev->info, &matrix_mdev->matrix);
+ vfio_ap_matrix_init(&matrix_dev->info, &matrix_mdev->shadow_apcb);
hash_init(matrix_mdev->qtable.queues);
mdev_set_drvdata(mdev, matrix_mdev);
mutex_lock(&matrix_dev->lock);
@@ -1178,10 +1179,11 @@ static int vfio_ap_mdev_set_kvm(struct ap_matrix_mdev *matrix_mdev,
kvm_get_kvm(kvm);
matrix_mdev->kvm = kvm;
kvm->arch.crypto.data = matrix_mdev;
- kvm_arch_crypto_set_masks(kvm,
- matrix_mdev->matrix.apm,
- matrix_mdev->matrix.aqm,
- matrix_mdev->matrix.adm);
+ memcpy(&matrix_mdev->shadow_apcb, &matrix_mdev->matrix,
+ sizeof(struct ap_matrix));
+ kvm_arch_crypto_set_masks(kvm, matrix_mdev->shadow_apcb.apm,
+ matrix_mdev->shadow_apcb.aqm,
+ matrix_mdev->shadow_apcb.adm);
mutex_unlock(&kvm->lock);
mutex_unlock(&matrix_dev->lock);
diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h
index c1f57f89973e..6dc0ebbf7a06 100644
--- a/drivers/s390/crypto/vfio_ap_private.h
+++ b/drivers/s390/crypto/vfio_ap_private.h
@@ -91,6 +91,7 @@ struct ap_queue_table {
* @node: allows the ap_matrix_mdev struct to be added to a list
* @matrix: the adapters, usage domains and control domains assigned to the
* mediated matrix device.
+ * @shadow_apcb: the shadow copy of the APCB field of the KVM guest's CRYCB
* @group_notifier: notifier block used for specifying callback function for
* handling the VFIO_GROUP_NOTIFY_SET_KVM event
* @iommu_notifier: notifier block used for specifying callback function for
@@ -105,6 +106,7 @@ struct ap_matrix_mdev {
struct vfio_device vdev;
struct list_head node;
struct ap_matrix matrix;
+ struct ap_matrix shadow_apcb;
struct notifier_block group_notifier;
struct notifier_block iommu_notifier;
struct kvm *kvm;
--
2.31.1
next prev parent reply other threads:[~2021-10-21 15:24 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-21 15:23 [PATCH v17 00/15] s390/vfio-ap: dynamic configuration support Tony Krowiak
2021-10-21 15:23 ` [PATCH v17 01/15] s390/vfio-ap: Set pqap hook when vfio_ap module is loaded Tony Krowiak
2021-12-27 8:21 ` Halil Pasic
2022-01-11 21:13 ` Tony Krowiak
2022-01-04 16:22 ` Jason J. Herne
2022-01-11 17:29 ` Tony Krowiak
2021-10-21 15:23 ` [PATCH v17 02/15] s390/vfio-ap: use new AP bus interface to search for queue devices Tony Krowiak
2021-12-27 8:25 ` Halil Pasic
2022-01-11 17:32 ` Tony Krowiak
2021-10-21 15:23 ` [PATCH v17 03/15] s390/vfio-ap: move probe and remove callbacks to vfio_ap_ops.c Tony Krowiak
2021-10-21 15:23 ` [PATCH v17 04/15] s390/vfio-ap: manage link between queue struct and matrix mdev Tony Krowiak
2021-10-21 15:23 ` Tony Krowiak [this message]
2021-10-21 15:23 ` [PATCH v17 06/15] s390/vfio-ap: refresh guest's APCB by filtering APQNs assigned to mdev Tony Krowiak
2021-12-27 8:53 ` Halil Pasic
2022-01-11 21:19 ` Tony Krowiak
2022-01-12 11:52 ` Halil Pasic
2022-01-15 0:31 ` Tony Krowiak
2021-10-21 15:23 ` [PATCH v17 07/15] s390/vfio-ap: allow assignment of unavailable AP queues to mdev device Tony Krowiak
2021-12-27 9:06 ` Halil Pasic
2021-10-21 15:23 ` [PATCH v17 08/15] s390/vfio-ap: keep track of active guests Tony Krowiak
2021-12-30 2:04 ` Halil Pasic
2022-01-11 21:27 ` Tony Krowiak
2021-12-30 3:33 ` Halil Pasic
2022-01-11 21:58 ` Tony Krowiak
2022-01-11 22:19 ` Tony Krowiak
2022-01-12 14:25 ` Halil Pasic
2022-01-15 0:29 ` Tony Krowiak
2021-10-21 15:23 ` [PATCH v17 09/15] s390/vfio-ap: allow hot plug/unplug of AP resources using mdev device Tony Krowiak
2022-01-09 21:36 ` Halil Pasic
2022-01-11 22:42 ` Tony Krowiak
2021-10-21 15:23 ` [PATCH v17 10/15] s390/vfio-ap: reset queues after adapter/domain unassignment Tony Krowiak
2021-10-21 15:23 ` [PATCH v17 11/15] s390/ap: driver callback to indicate resource in use Tony Krowiak
2021-11-04 11:27 ` Harald Freudenberger
2021-11-04 15:48 ` Tony Krowiak
2021-10-21 15:23 ` [PATCH v17 12/15] s390/vfio-ap: implement in-use callback for vfio_ap driver Tony Krowiak
2021-10-21 15:23 ` [PATCH v17 13/15] s390/vfio-ap: sysfs attribute to display the guest's matrix Tony Krowiak
2021-10-21 15:23 ` [PATCH v17 14/15] s390/ap: notify drivers on config changed and scan complete callbacks Tony Krowiak
2021-11-04 12:06 ` Harald Freudenberger
2021-11-04 15:50 ` Tony Krowiak
2021-11-05 8:23 ` Harald Freudenberger
2021-11-05 13:15 ` Harald Freudenberger
2021-11-08 14:27 ` Tony Krowiak
2021-11-08 14:26 ` Tony Krowiak
2022-02-04 10:43 ` Halil Pasic
2022-02-07 19:39 ` Tony Krowiak
2022-02-08 1:38 ` Halil Pasic
2022-02-08 3:27 ` Tony Krowiak
2021-10-21 15:23 ` [PATCH v17 15/15] s390/vfio-ap: update docs to include dynamic config support Tony Krowiak
2021-10-27 14:24 ` [PATCH v17 00/15] s390/vfio-ap: dynamic configuration support Tony Krowiak
2021-11-02 19:23 ` Tony Krowiak
2021-11-15 15:45 ` Tony Krowiak
2021-11-22 16:12 ` Tony Krowiak
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