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-rw-r--r--drivers/s390/crypto/vfio_ap_ops.c152
-rw-r--r--drivers/s390/crypto/vfio_ap_private.h2
2 files changed, 114 insertions, 40 deletions
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
index 8346ad4f1942..906bb8c7c4a1 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -30,9 +30,10 @@
#define AP_QUEUE_UNASSIGNED "unassigned"
#define AP_QUEUE_IN_USE "in use"
-static int vfio_ap_mdev_reset_queues(struct ap_matrix_mdev *matrix_mdev);
+static int vfio_ap_mdev_reset_queues(struct ap_queue_table *qtable);
static struct vfio_ap_queue *vfio_ap_find_queue(int apqn);
static const struct vfio_device_ops vfio_ap_matrix_dev_ops;
+static int vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q, unsigned int retry);
/**
* get_update_locks_for_kvm: Acquire the locks required to dynamically update a
@@ -649,6 +650,7 @@ static bool vfio_ap_mdev_filter_matrix(unsigned long *apm, unsigned long *aqm,
unsigned long apid, apqi, apqn;
DECLARE_BITMAP(prev_shadow_apm, AP_DEVICES);
DECLARE_BITMAP(prev_shadow_aqm, AP_DOMAINS);
+ struct vfio_ap_queue *q;
ret = ap_qci(&matrix_dev->info);
if (ret)
@@ -679,8 +681,8 @@ static bool vfio_ap_mdev_filter_matrix(unsigned long *apm, unsigned long *aqm,
* hardware device.
*/
apqn = AP_MKQID(apid, apqi);
-
- if (!vfio_ap_mdev_get_queue(matrix_mdev, apqn)) {
+ q = vfio_ap_mdev_get_queue(matrix_mdev, apqn);
+ if (!q || q->reset_rc) {
clear_bit_inv(apid,
matrix_mdev->shadow_apcb.apm);
break;
@@ -760,12 +762,6 @@ static void vfio_ap_unlink_mdev_fr_queue(struct vfio_ap_queue *q)
q->matrix_mdev = NULL;
}
-static void vfio_ap_mdev_unlink_queue(struct vfio_ap_queue *q)
-{
- vfio_ap_unlink_queue_fr_mdev(q);
- vfio_ap_unlink_mdev_fr_queue(q);
-}
-
static void vfio_ap_mdev_unlink_fr_queues(struct ap_matrix_mdev *matrix_mdev)
{
struct vfio_ap_queue *q;
@@ -790,7 +786,7 @@ static void vfio_ap_mdev_remove(struct mdev_device *mdev)
mutex_lock(&matrix_dev->guests_lock);
mutex_lock(&matrix_dev->mdevs_lock);
- vfio_ap_mdev_reset_queues(matrix_mdev);
+ vfio_ap_mdev_reset_queues(&matrix_mdev->qtable);
vfio_ap_mdev_unlink_fr_queues(matrix_mdev);
list_del(&matrix_mdev->node);
mutex_unlock(&matrix_dev->mdevs_lock);
@@ -1004,18 +1000,70 @@ done:
}
static DEVICE_ATTR_WO(assign_adapter);
+static struct vfio_ap_queue
+*vfio_ap_unlink_apqn_fr_mdev(struct ap_matrix_mdev *matrix_mdev,
+ unsigned long apid, unsigned long apqi)
+{
+ struct vfio_ap_queue *q = NULL;
+
+ q = vfio_ap_mdev_get_queue(matrix_mdev, AP_MKQID(apid, apqi));
+ /* If the queue is assigned to the matrix mdev, unlink it. */
+ if (q)
+ vfio_ap_unlink_queue_fr_mdev(q);
+
+ return q;
+}
+
+/**
+ * vfio_ap_mdev_unlink_adapter - unlink all queues associated with unassigned
+ * adapter from the matrix mdev to which the
+ * adapter was assigned.
+ * @matrix_mdev: the matrix mediated device to which the adapter was assigned.
+ * @apid: the APID of the unassigned adapter.
+ * @qtable: table for storing queues associated with unassigned adapter.
+ */
static void vfio_ap_mdev_unlink_adapter(struct ap_matrix_mdev *matrix_mdev,
- unsigned long apid)
+ unsigned long apid,
+ struct ap_queue_table *qtable)
{
unsigned long apqi;
struct vfio_ap_queue *q;
for_each_set_bit_inv(apqi, matrix_mdev->matrix.aqm, AP_DOMAINS) {
- q = vfio_ap_mdev_get_queue(matrix_mdev, AP_MKQID(apid, apqi));
+ q = vfio_ap_unlink_apqn_fr_mdev(matrix_mdev, apid, apqi);
+
+ if (q && qtable) {
+ if (test_bit_inv(apid, matrix_mdev->shadow_apcb.apm) &&
+ test_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm))
+ hash_add(qtable->queues, &q->mdev_qnode,
+ q->apqn);
+ }
+ }
+}
+
+static void vfio_ap_mdev_hot_unplug_adapter(struct ap_matrix_mdev *matrix_mdev,
+ unsigned long apid)
+{
+ int loop_cursor;
+ struct vfio_ap_queue *q;
+ struct ap_queue_table *qtable = kzalloc(sizeof(*qtable), GFP_KERNEL);
+
+ hash_init(qtable->queues);
+ vfio_ap_mdev_unlink_adapter(matrix_mdev, apid, qtable);
+
+ if (test_bit_inv(apid, matrix_mdev->shadow_apcb.apm)) {
+ clear_bit_inv(apid, matrix_mdev->shadow_apcb.apm);
+ vfio_ap_mdev_update_guest_apcb(matrix_mdev);
+ }
+
+ vfio_ap_mdev_reset_queues(qtable);
- if (q)
- vfio_ap_mdev_unlink_queue(q);
+ hash_for_each(qtable->queues, loop_cursor, q, mdev_qnode) {
+ vfio_ap_unlink_mdev_fr_queue(q);
+ hash_del(&q->mdev_qnode);
}
+
+ kfree(qtable);
}
/**
@@ -1053,13 +1101,7 @@ static ssize_t unassign_adapter_store(struct device *dev,
}
clear_bit_inv((unsigned long)apid, matrix_mdev->matrix.apm);
- vfio_ap_mdev_unlink_adapter(matrix_mdev, apid);
-
- if (test_bit_inv(apid, matrix_mdev->shadow_apcb.apm)) {
- clear_bit_inv(apid, matrix_mdev->shadow_apcb.apm);
- vfio_ap_mdev_update_guest_apcb(matrix_mdev);
- }
-
+ vfio_ap_mdev_hot_unplug_adapter(matrix_mdev, apid);
ret = count;
done:
release_update_locks_for_mdev(matrix_mdev);
@@ -1152,19 +1194,49 @@ done:
static DEVICE_ATTR_WO(assign_domain);
static void vfio_ap_mdev_unlink_domain(struct ap_matrix_mdev *matrix_mdev,
- unsigned long apqi)
+ unsigned long apqi,
+ struct ap_queue_table *qtable)
{
unsigned long apid;
struct vfio_ap_queue *q;
for_each_set_bit_inv(apid, matrix_mdev->matrix.apm, AP_DEVICES) {
- q = vfio_ap_mdev_get_queue(matrix_mdev, AP_MKQID(apid, apqi));
+ q = vfio_ap_unlink_apqn_fr_mdev(matrix_mdev, apid, apqi);
- if (q)
- vfio_ap_mdev_unlink_queue(q);
+ if (q && qtable) {
+ if (test_bit_inv(apid, matrix_mdev->shadow_apcb.apm) &&
+ test_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm))
+ hash_add(qtable->queues, &q->mdev_qnode,
+ q->apqn);
+ }
}
}
+static void vfio_ap_mdev_hot_unplug_domain(struct ap_matrix_mdev *matrix_mdev,
+ unsigned long apqi)
+{
+ int loop_cursor;
+ struct vfio_ap_queue *q;
+ struct ap_queue_table *qtable = kzalloc(sizeof(*qtable), GFP_KERNEL);
+
+ hash_init(qtable->queues);
+ vfio_ap_mdev_unlink_domain(matrix_mdev, apqi, qtable);
+
+ if (test_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm)) {
+ clear_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm);
+ vfio_ap_mdev_update_guest_apcb(matrix_mdev);
+ }
+
+ vfio_ap_mdev_reset_queues(qtable);
+
+ hash_for_each(qtable->queues, loop_cursor, q, mdev_qnode) {
+ vfio_ap_unlink_mdev_fr_queue(q);
+ hash_del(&q->mdev_qnode);
+ }
+
+ kfree(qtable);
+}
+
/**
* unassign_domain_store - parses the APQI from @buf and clears the
* corresponding bit in the mediated matrix device's AQM
@@ -1200,13 +1272,7 @@ static ssize_t unassign_domain_store(struct device *dev,
}
clear_bit_inv((unsigned long)apqi, matrix_mdev->matrix.aqm);
- vfio_ap_mdev_unlink_domain(matrix_mdev, apqi);
-
- if (test_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm)) {
- clear_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm);
- vfio_ap_mdev_update_guest_apcb(matrix_mdev);
- }
-
+ vfio_ap_mdev_hot_unplug_domain(matrix_mdev, apqi);
ret = count;
done:
@@ -1491,7 +1557,7 @@ static void vfio_ap_mdev_unset_kvm(struct ap_matrix_mdev *matrix_mdev)
get_update_locks_for_kvm(kvm);
kvm_arch_crypto_clear_masks(kvm);
- vfio_ap_mdev_reset_queues(matrix_mdev);
+ vfio_ap_mdev_reset_queues(&matrix_mdev->qtable);
kvm_put_kvm(kvm);
matrix_mdev->kvm = NULL;
@@ -1525,9 +1591,9 @@ static int vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q,
if (!q)
return 0;
-
retry_zapq:
status = ap_zapq(q->apqn);
+ q->reset_rc = status.response_code;
switch (status.response_code) {
case AP_RESPONSE_NORMAL:
ret = 0;
@@ -1542,12 +1608,17 @@ retry_zapq:
case AP_RESPONSE_Q_NOT_AVAIL:
case AP_RESPONSE_DECONFIGURED:
case AP_RESPONSE_CHECKSTOPPED:
- WARN_ON_ONCE(status.irq_enabled);
+ WARN_ONCE(status.irq_enabled,
+ "PQAP/ZAPQ for %02x.%04x failed with rc=%u while IRQ enabled",
+ AP_QID_CARD(q->apqn), AP_QID_QUEUE(q->apqn),
+ status.response_code);
ret = -EBUSY;
goto free_resources;
default:
/* things are really broken, give up */
- WARN(true, "PQAP/ZAPQ completed with invalid rc (%x)\n",
+ WARN(true,
+ "PQAP/ZAPQ for %02x.%04x failed with invalid rc=%u\n",
+ AP_QID_CARD(q->apqn), AP_QID_QUEUE(q->apqn),
status.response_code);
return -EIO;
}
@@ -1559,7 +1630,8 @@ retry_zapq:
msleep(20);
status = ap_tapq(q->apqn, NULL);
}
- WARN_ON_ONCE(retry2 <= 0);
+ WARN_ONCE(retry2 <= 0, "unable to verify reset of queue %02x.%04x",
+ AP_QID_CARD(q->apqn), AP_QID_QUEUE(q->apqn));
free_resources:
vfio_ap_free_aqic_resources(q);
@@ -1567,12 +1639,12 @@ free_resources:
return ret;
}
-static int vfio_ap_mdev_reset_queues(struct ap_matrix_mdev *matrix_mdev)
+static int vfio_ap_mdev_reset_queues(struct ap_queue_table *qtable)
{
int ret, loop_cursor, rc = 0;
struct vfio_ap_queue *q;
- hash_for_each(matrix_mdev->qtable.queues, loop_cursor, q, mdev_qnode) {
+ hash_for_each(qtable->queues, loop_cursor, q, mdev_qnode) {
ret = vfio_ap_mdev_reset_queue(q, 1);
/*
* Regardless whether a queue turns out to be busy, or
@@ -1656,7 +1728,7 @@ static ssize_t vfio_ap_mdev_ioctl(struct vfio_device *vdev,
ret = vfio_ap_mdev_get_device_info(arg);
break;
case VFIO_DEVICE_RESET:
- ret = vfio_ap_mdev_reset_queues(matrix_mdev);
+ ret = vfio_ap_mdev_reset_queues(&matrix_mdev->qtable);
break;
default:
ret = -EOPNOTSUPP;
diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h
index 97734b599583..dd81b3da0235 100644
--- a/drivers/s390/crypto/vfio_ap_private.h
+++ b/drivers/s390/crypto/vfio_ap_private.h
@@ -126,6 +126,7 @@ struct ap_matrix_mdev {
* @apqn: the APQN of the AP queue device
* @saved_isc: the guest ISC registered with the GIB interface
* @mdev_qnode: allows the vfio_ap_queue struct to be added to a hashtable
+ * @reset_rc: the status response code from the last reset of the queue
*/
struct vfio_ap_queue {
struct ap_matrix_mdev *matrix_mdev;
@@ -134,6 +135,7 @@ struct vfio_ap_queue {
#define VFIO_AP_ISC_INVALID 0xff
unsigned char saved_isc;
struct hlist_node mdev_qnode;
+ unsigned int reset_rc;
};
int vfio_ap_mdev_register(void);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 22:23:37 +0000