[PATCH v18 15/18] s390/vfio-ap: handle config changed and scan complete notification

Tony Krowiak
2022-02-15T00:51:55Z

This patch implements two new AP driver callbacks:

void (*on_config_changed)(struct ap_config_info *new_config_info,
struct ap_config_info *old_config_info);

void (*on_scan_complete)(struct ap_config_info *new_config_info,
struct ap_config_info *old_config_info);

The on_config_changed callback is invoked at the start of the AP bus scan
function when it determines that the host AP configuration information
has changed since the previous scan.

The vfio_ap device driver registers a callback function for this callback
that performs the following operations:

1. Unplugs the adapters, domains and control domains removed from the
host's AP configuration from the guests to which they are
assigned in a single operation.

2. Stores bitmaps identifying the adapters, domains and control domains
added to the host's AP configuration with the structure representing
the mediated device. When the vfio_ap device driver's probe callback is
subsequently invoked, the probe function will recognize that the
queue is being probed due to a change in the host's AP configuration
and the plugging of the queue into the guest will be bypassed.

The on_scan_complete callback is invoked after the ap bus scan is
completed if the host AP configuration data has changed. The vfio_ap
device driver registers a callback function for this callback that hot
plugs each queue and control domain added to the AP configuration for each
guest using them in a single hot plug operation.

Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
---
drivers/s390/crypto/vfio_ap_drv.c | 4 +-
drivers/s390/crypto/vfio_ap_ops.c | 347 ++++++++++++++++++++++++--
drivers/s390/crypto/vfio_ap_private.h | 15 +-
3 files changed, 338 insertions(+), 28 deletions(-)

diff --git a/drivers/s390/crypto/vfio_ap_drv.c b/drivers/s390/crypto/vfio_ap_drv.c
index c4f0e28b1e91..711d5f2645b8 100644
--- a/drivers/s390/crypto/vfio_ap_drv.c
+++ b/drivers/s390/crypto/vfio_ap_drv.c
@@ -104,6 +104,8 @@ static struct ap_driver vfio_ap_drv = {
.probe = vfio_ap_mdev_probe_queue,
.remove = vfio_ap_mdev_remove_queue,
.in_use = vfio_ap_mdev_resource_in_use,
+ .on_config_changed = vfio_ap_on_cfg_changed,
+ .on_scan_complete = vfio_ap_on_scan_complete,
.ids = ap_queue_ids,
};

@@ -151,7 +153,7 @@ static int vfio_ap_matrix_dev_create(void)

/* Fill in config info via PQAP(QCI), if available */
if (test_facility(12)) {
- ret = ap_qci(&matrix_dev->info);
+ ret = ap_qci(&matrix_dev->config_info);
if (ret)
goto matrix_alloc_err;
}
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
index 02f75c4207b0..3304088d1012 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -333,7 +333,7 @@ static bool vfio_ap_mdev_filter_cdoms(struct ap_matrix_mdev *matrix_mdev)

bitmap_copy(shadow_adm, matrix_mdev->shadow_apcb.adm, AP_DOMAINS);
bitmap_and(matrix_mdev->shadow_apcb.adm, matrix_mdev->matrix.adm,
- (unsigned long *)matrix_dev->info.adm, AP_DOMAINS);
+ (unsigned long *)matrix_dev->config_info.adm, AP_DOMAINS);

return !bitmap_equal(shadow_adm, matrix_mdev->shadow_apcb.adm,
AP_DOMAINS);
@@ -353,19 +353,15 @@ static bool vfio_ap_mdev_filter_cdoms(struct ap_matrix_mdev *matrix_mdev)
static bool vfio_ap_mdev_filter_matrix(unsigned long *apm, unsigned long *aqm,
struct ap_matrix_mdev *matrix_mdev)
{
- int ret;
unsigned long apid, apqi, apqn;
DECLARE_BITMAP(shadow_apm, AP_DEVICES);
DECLARE_BITMAP(shadow_aqm, AP_DOMAINS);
struct vfio_ap_queue *q;

- ret = ap_qci(&matrix_dev->info);
- if (ret)
- return false;
-
bitmap_copy(shadow_apm, matrix_mdev->shadow_apcb.apm, AP_DEVICES);
bitmap_copy(shadow_aqm, matrix_mdev->shadow_apcb.aqm, AP_DOMAINS);
- vfio_ap_matrix_init(&matrix_dev->info, &matrix_mdev->shadow_apcb);
+ vfio_ap_matrix_init(&matrix_dev->config_info,
+ &matrix_mdev->shadow_apcb);

/*
* Copy the adapters, domains and control domains to the shadow_apcb
@@ -373,9 +369,9 @@ static bool vfio_ap_mdev_filter_matrix(unsigned long *apm, unsigned long *aqm,
* AP configuration.
*/
bitmap_and(matrix_mdev->shadow_apcb.apm, matrix_mdev->matrix.apm,
- (unsigned long *)matrix_dev->info.apm, AP_DEVICES);
+ (unsigned long *)matrix_dev->config_info.apm, AP_DEVICES);
bitmap_and(matrix_mdev->shadow_apcb.aqm, matrix_mdev->matrix.aqm,
- (unsigned long *)matrix_dev->info.aqm, AP_DOMAINS);
+ (unsigned long *)matrix_dev->config_info.aqm, AP_DOMAINS);

for_each_set_bit_inv(apid, apm, AP_DEVICES) {
for_each_set_bit_inv(apqi, aqm, AP_DOMAINS) {
@@ -389,6 +385,7 @@ static bool vfio_ap_mdev_filter_matrix(unsigned long *apm, unsigned long *aqm,
*/
apqn = AP_MKQID(apid, apqi);
q = vfio_ap_mdev_get_queue(matrix_mdev, apqn);
+
if (!q || q->reset_rc) {
clear_bit_inv(apid,
matrix_mdev->shadow_apcb.apm);
@@ -420,9 +417,10 @@ static int vfio_ap_mdev_probe(struct mdev_device *mdev)
&vfio_ap_matrix_dev_ops);

matrix_mdev->mdev = mdev;
- vfio_ap_matrix_init(&matrix_dev->info, &matrix_mdev->matrix);
+ vfio_ap_matrix_init(&matrix_dev->config_info, &matrix_mdev->matrix);
+ vfio_ap_matrix_init(&matrix_dev->config_info,
+ &matrix_mdev->shadow_apcb);
matrix_mdev->pqap_hook = handle_pqap;
- 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->guests_lock);
@@ -790,13 +788,17 @@ static void vfio_ap_unlink_apqn_fr_mdev(struct ap_matrix_mdev *matrix_mdev,

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)
+ if (q) {
vfio_ap_unlink_queue_fr_mdev(q);

- /* If the queue is assigned to the APCB, store it in @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);
+ /* If the queue is assigned to the APCB, store it in @qtable. */
+ if (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);
+ }
+ }
}

/**
@@ -1271,7 +1273,7 @@ static const struct attribute_group *vfio_ap_mdev_attr_groups[] = {
* @matrix_mdev: a mediated matrix device
* @kvm: reference to KVM instance
*
- * Note: The matrix_dev->lock must be taken prior to calling
+ * Note: The matrix_dev->mdevs_lock must be taken prior to calling
* this function; however, the lock will be temporarily released while the
* guest's AP configuration is set to avoid a potential lockdep splat.
* The kvm->lock is taken to set the guest's AP configuration which, under
@@ -1355,7 +1357,7 @@ static int vfio_ap_mdev_iommu_notifier(struct notifier_block *nb,
* @matrix_mdev: a matrix mediated device
* @kvm: the pointer to the kvm structure being unset.
*
- * Note: The matrix_dev->lock must be taken prior to calling
+ * Note: The matrix_dev->mdevs_lock must be taken prior to calling
* this function; however, the lock will be temporarily released while the
* guest's AP configuration is cleared to avoid a potential lockdep splat.
* The kvm->lock is taken to clear the guest's AP configuration which, under
@@ -1708,6 +1710,27 @@ static void vfio_ap_mdev_put_qlocks(struct ap_matrix_mdev *matrix_mdev)
mutex_unlock(&matrix_dev->guests_lock);
}

+static bool vfio_ap_mdev_do_filter_matrix(struct ap_matrix_mdev *matrix_mdev,
+ struct vfio_ap_queue *q)
+{
+ unsigned long apid = AP_QID_CARD(q->apqn);
+ unsigned long apqi = AP_QID_QUEUE(q->apqn);
+
+ /*
+ * If the queue is being probed because its APID or APQI is in the
+ * process of being added to the host's AP configuration, then we don't
+ * want to filter the matrix now as the filtering will be done after
+ * the driver is notified that the AP bus scan operation has completed
+ * (see the vfio_ap_on_scan_complete callback function).
+ */
+ if (test_bit_inv(apid, matrix_mdev->apm_add) ||
+ test_bit_inv(apqi, matrix_mdev->aqm_add))
+ return false;
+
+
+ return true;
+}
+
int vfio_ap_mdev_probe_queue(struct ap_device *apdev)
{
struct vfio_ap_queue *q;
@@ -1725,10 +1748,15 @@ int vfio_ap_mdev_probe_queue(struct ap_device *apdev)
vfio_ap_mdev_link_queue(matrix_mdev, q);
memset(apm, 0, sizeof(apm));
set_bit_inv(AP_QID_CARD(q->apqn), apm);
- if (vfio_ap_mdev_filter_matrix(apm, q->matrix_mdev->matrix.aqm,
- q->matrix_mdev))
- vfio_ap_mdev_hotplug_apcb(q->matrix_mdev);
+
+ if (vfio_ap_mdev_do_filter_matrix(q->matrix_mdev, q)) {
+ if (vfio_ap_mdev_filter_matrix(apm,
+ q->matrix_mdev->matrix.aqm,
+ q->matrix_mdev))
+ vfio_ap_mdev_hotplug_apcb(q->matrix_mdev);
+ }
}
+
dev_set_drvdata(&apdev->device, q);
vfio_ap_mdev_put_qlocks(matrix_mdev);

@@ -1783,10 +1811,15 @@ void vfio_ap_mdev_remove_queue(struct ap_device *apdev)

apid = AP_QID_CARD(q->apqn);
apqi = AP_QID_QUEUE(q->apqn);
- if (test_bit_inv(apid, matrix_mdev->shadow_apcb.apm) &&
- test_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm)) {
- clear_bit_inv(apid, matrix_mdev->shadow_apcb.apm);
- vfio_ap_mdev_hotplug_apcb(matrix_mdev);
+
+ /*
+ * If the queue is assigned to the guest's APCB, then remove
+ * the adapter's APID from the APCB and hot it into the guest.
+ */
+ if (test_bit_inv(apid, q->matrix_mdev->shadow_apcb.apm) &&
+ test_bit_inv(apqi, q->matrix_mdev->shadow_apcb.aqm)) {
+ clear_bit_inv(apid, q->matrix_mdev->shadow_apcb.apm);
+ vfio_ap_mdev_hotplug_apcb(q->matrix_mdev);
}
}

@@ -1842,3 +1875,267 @@ int vfio_ap_mdev_resource_in_use(unsigned long *apm, unsigned long *aqm)

return ret;
}
+
+/**
+ * vfio_ap_mdev_hot_unplug_cfg - hot unplug the adapters, domains and control
+ * domains that have been removed from the host's
+ * AP configuration from a guest.
+ *
+ * @guest: the guest
+ * @aprem: the adapters that have been removed from the host's AP configuration
+ * @aqrem: the domains that have been removed from the host's AP configuration
+ * @cdrem: the control domains that have been removed from the host's AP
+ * configuration.
+ */
+static void vfio_ap_mdev_hot_unplug_cfg(struct ap_matrix_mdev *matrix_mdev,
+ unsigned long *aprem,
+ unsigned long *aqrem,
+ unsigned long *cdrem)
+{
+ bool do_hotplug = false;
+
+ if (!bitmap_empty(aprem, AP_DEVICES)) {
+ do_hotplug |= bitmap_andnot(matrix_mdev->shadow_apcb.apm,
+ matrix_mdev->shadow_apcb.apm,
+ aprem, AP_DEVICES);
+ }
+
+ if (!bitmap_empty(aqrem, AP_DOMAINS)) {
+ do_hotplug |= bitmap_andnot(matrix_mdev->shadow_apcb.aqm,
+ matrix_mdev->shadow_apcb.aqm,
+ aqrem, AP_DEVICES);
+ }
+
+ if (!bitmap_empty(cdrem, AP_DOMAINS))
+ do_hotplug |= bitmap_andnot(matrix_mdev->shadow_apcb.adm,
+ matrix_mdev->shadow_apcb.adm,
+ cdrem, AP_DOMAINS);
+
+ if (do_hotplug)
+ vfio_ap_mdev_hotplug_apcb(matrix_mdev);
+}
+
+/**
+ * vfio_ap_mdev_cfg_remove - determines which guests are using the adapters,
+ * domains and control domains that have been removed
+ * from the host AP configuration and unplugs them
+ * from those guests.
+ *
+ * @ap_remove: bitmap specifying which adapters have been removed from the host
+ * config.
+ * @aq_remove: bitmap specifying which domains have been removed from the host
+ * config.
+ * @cd_remove: bitmap specifying which control domains have been removed from
+ * the host config.
+ */
+static void vfio_ap_mdev_cfg_remove(unsigned long *ap_remove,
+ unsigned long *aq_remove,
+ unsigned long *cd_remove)
+{
+ struct ap_matrix_mdev *matrix_mdev;
+ DECLARE_BITMAP(aprem, AP_DEVICES);
+ DECLARE_BITMAP(aqrem, AP_DOMAINS);
+ DECLARE_BITMAP(cdrem, AP_DOMAINS);
+ int do_ap_remove, do_aq_remove, do_cd_remove;
+
+ list_for_each_entry(matrix_mdev, &matrix_dev->mdev_list, node) {
+ if (!matrix_mdev->kvm)
+ continue;
+
+ mutex_lock(&matrix_mdev->kvm->lock);
+ mutex_lock(&matrix_dev->mdevs_lock);
+
+ do_ap_remove = bitmap_and(aprem, ap_remove,
+ matrix_mdev->matrix.apm,
+ AP_DEVICES);
+ do_aq_remove = bitmap_and(aqrem, aq_remove,
+ matrix_mdev->matrix.aqm,
+ AP_DOMAINS);
+ do_cd_remove = bitmap_andnot(cdrem, cd_remove,
+ matrix_mdev->matrix.adm,
+ AP_DOMAINS);
+
+ if (do_ap_remove || do_aq_remove || do_cd_remove)
+ vfio_ap_mdev_hot_unplug_cfg(matrix_mdev, aprem, aqrem,
+ cdrem);
+
+ mutex_unlock(&matrix_dev->mdevs_lock);
+ mutex_unlock(&matrix_mdev->kvm->lock);
+ }
+}
+
+/**
+ * vfio_ap_mdev_on_cfg_remove - responds to the removal of adapters, domains and
+ * control domains from the host AP configuration
+ * by unplugging them from the guests that are
+ * using them.
+ */
+static void vfio_ap_mdev_on_cfg_remove(void)
+{
+ int ap_remove, aq_remove, cd_remove;
+ DECLARE_BITMAP(aprem, AP_DEVICES);
+ DECLARE_BITMAP(aqrem, AP_DOMAINS);
+ DECLARE_BITMAP(cdrem, AP_DOMAINS);
+ unsigned long *cur_apm, *cur_aqm, *cur_adm;
+ unsigned long *prev_apm, *prev_aqm, *prev_adm;
+
+ cur_apm = (unsigned long *)matrix_dev->config_info.apm;
+ cur_aqm = (unsigned long *)matrix_dev->config_info.aqm;
+ cur_adm = (unsigned long *)matrix_dev->config_info.adm;
+ prev_apm = (unsigned long *)matrix_dev->config_info_prev.apm;
+ prev_aqm = (unsigned long *)matrix_dev->config_info_prev.aqm;
+ prev_adm = (unsigned long *)matrix_dev->config_info_prev.adm;
+
+ ap_remove = bitmap_andnot(aprem, prev_apm, cur_apm, AP_DEVICES);
+ aq_remove = bitmap_andnot(aqrem, prev_aqm, cur_aqm, AP_DOMAINS);
+ cd_remove = bitmap_andnot(cdrem, prev_adm, cur_adm, AP_DOMAINS);
+
+ if (ap_remove || aq_remove || cd_remove)
+ vfio_ap_mdev_cfg_remove(aprem, aqrem, cdrem);
+}
+
+/**
+ * vfio_ap_mdev_cfg_add - store bitmaps specifying the adapters, domains and
+ * control domains that have been added to the host's
+ * AP configuration for each matrix mdev to which they
+ * are assigned.
+ *
+ * @apm_add: a bitmap specifying the adapters that have been added to the AP
+ * configuration.
+ * @aqm_add: a bitmap specifying the domains that have been added to the AP
+ * configuration.
+ * @adm_add: a bitmap specifying the control domains that have been added to the
+ * AP configuration.
+ */
+static void vfio_ap_mdev_cfg_add(unsigned long *apm_add, unsigned long *aqm_add,
+ unsigned long *adm_add)
+{
+ struct ap_matrix_mdev *matrix_mdev;
+
+ list_for_each_entry(matrix_mdev, &matrix_dev->mdev_list, node) {
+ bitmap_and(matrix_mdev->apm_add,
+ matrix_mdev->matrix.apm, apm_add, AP_DEVICES);
+ bitmap_and(matrix_mdev->aqm_add,
+ matrix_mdev->matrix.aqm, aqm_add, AP_DOMAINS);
+ bitmap_and(matrix_mdev->adm_add,
+ matrix_mdev->matrix.adm, adm_add, AP_DEVICES);
+ }
+}
+
+/**
+ * vfio_ap_mdev_on_cfg_add - responds to the addition of adapters, domains and
+ * control domains to the host AP configuration
+ * by updating the bitmaps that specify what adapters,
+ * domains and control domains have been added so they
+ * can be hot plugged into the guest when the AP bus
+ * scan completes (see vfio_ap_on_scan_complete
+ * function).
+ */
+static void vfio_ap_mdev_on_cfg_add(void)
+{
+ bool do_add;
+ DECLARE_BITMAP(apm_add, AP_DEVICES);
+ DECLARE_BITMAP(aqm_add, AP_DOMAINS);
+ DECLARE_BITMAP(adm_add, AP_DOMAINS);
+ unsigned long *cur_apm, *cur_aqm, *cur_adm;
+ unsigned long *prev_apm, *prev_aqm, *prev_adm;
+
+ cur_apm = (unsigned long *)matrix_dev->config_info.apm;
+ cur_aqm = (unsigned long *)matrix_dev->config_info.aqm;
+ cur_adm = (unsigned long *)matrix_dev->config_info.adm;
+
+ prev_apm = (unsigned long *)matrix_dev->config_info_prev.apm;
+ prev_aqm = (unsigned long *)matrix_dev->config_info_prev.aqm;
+ prev_adm = (unsigned long *)matrix_dev->config_info_prev.adm;
+
+ do_add = bitmap_andnot(apm_add, cur_apm, prev_apm, AP_DEVICES);
+ do_add |= bitmap_andnot(aqm_add, cur_aqm, prev_aqm, AP_DOMAINS);
+ do_add |= bitmap_andnot(adm_add, cur_adm, prev_adm, AP_DOMAINS);
+
+ if (do_add)
+ vfio_ap_mdev_cfg_add(apm_add, aqm_add, adm_add);
+}
+
+/**
+ * vfio_ap_on_cfg_changed - handles notification of changes to the host AP
+ * configuration.
+ *
+ * @new_config_info: the new host AP configuration
+ * @old_config_info: the previous host AP configuration
+ */
+void vfio_ap_on_cfg_changed(struct ap_config_info *new_config_info,
+ struct ap_config_info *old_config_info)
+{
+ mutex_lock(&matrix_dev->guests_lock);
+
+ memcpy(&matrix_dev->config_info_prev, old_config_info,
+ sizeof(struct ap_config_info));
+ memcpy(&matrix_dev->config_info, new_config_info,
+ sizeof(struct ap_config_info));
+ vfio_ap_mdev_on_cfg_remove();
+ vfio_ap_mdev_on_cfg_add();
+
+ mutex_unlock(&matrix_dev->guests_lock);
+}
+
+static void vfio_ap_mdev_hot_plug_cfg(struct ap_matrix_mdev *matrix_mdev)
+{
+// bool filter_matrix, filter_cdoms, do_hotplug = false;
+ bool do_hotplug = false;
+ bool filter_domains = false;
+ bool filter_adapters = false;
+ DECLARE_BITMAP(apm, AP_DEVICES);
+ DECLARE_BITMAP(aqm, AP_DOMAINS);
+
+ mutex_lock(&matrix_mdev->kvm->lock);
+ mutex_lock(&matrix_dev->mdevs_lock);
+
+ filter_adapters = bitmap_and(apm, matrix_mdev->matrix.apm,
+ matrix_mdev->apm_add, AP_DEVICES);
+ filter_domains = bitmap_and(aqm, matrix_mdev->matrix.aqm,
+ matrix_mdev->aqm_add, AP_DOMAINS);
+
+ if (filter_adapters && filter_domains)
+ do_hotplug |= vfio_ap_mdev_filter_matrix(apm, aqm, matrix_mdev);
+ else if (filter_adapters)
+ do_hotplug |=
+ vfio_ap_mdev_filter_matrix(apm,
+ matrix_mdev->shadow_apcb.aqm,
+ matrix_mdev);
+ else
+ do_hotplug |=
+ vfio_ap_mdev_filter_matrix(matrix_mdev->shadow_apcb.apm,
+ aqm, matrix_mdev);
+
+ if (bitmap_intersects(matrix_mdev->matrix.adm, matrix_mdev->adm_add,
+ AP_DOMAINS))
+ do_hotplug |= vfio_ap_mdev_filter_cdoms(matrix_mdev);
+
+ if (do_hotplug)
+ vfio_ap_mdev_hotplug_apcb(matrix_mdev);
+
+ mutex_unlock(&matrix_dev->mdevs_lock);
+ mutex_unlock(&matrix_mdev->kvm->lock);
+}
+
+void vfio_ap_on_scan_complete(struct ap_config_info *new_config_info,
+ struct ap_config_info *old_config_info)
+{
+ struct ap_matrix_mdev *matrix_mdev;
+
+ mutex_lock(&matrix_dev->guests_lock);
+
+ list_for_each_entry(matrix_mdev, &matrix_dev->mdev_list, node) {
+ if (bitmap_empty(matrix_mdev->apm_add, AP_DEVICES) &&
+ bitmap_empty(matrix_mdev->aqm_add, AP_DOMAINS) &&
+ bitmap_empty(matrix_mdev->adm_add, AP_DOMAINS))
+ continue;
+
+ vfio_ap_mdev_hot_plug_cfg(matrix_mdev);
+ bitmap_clear(matrix_mdev->apm_add, 0, AP_DEVICES);
+ bitmap_clear(matrix_mdev->aqm_add, 0, AP_DOMAINS);
+ bitmap_clear(matrix_mdev->adm_add, 0, AP_DOMAINS);
+ }
+
+ mutex_unlock(&matrix_dev->guests_lock);
+}
diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h
index e30f171f89ec..a7fe4a3cf896 100644
--- a/drivers/s390/crypto/vfio_ap_private.h
+++ b/drivers/s390/crypto/vfio_ap_private.h
@@ -31,7 +31,9 @@
*
* @device: generic device structure associated with the AP matrix device
* @available_instances: number of mediated matrix devices that can be created
- * @info: the struct containing the output from the PQAP(QCI) instruction
+ * @config_info: the object containing the current AP configuration for the host
+ * @config_info_prev: the object containing the previous AP configuration for
+ * Gthe host
* @mdev_list: the list of mediated matrix devices created
* @mdevs_lock: mutex for locking the ap_matrix_mdev devices under the control
* of the vfio_ap device driver. This lock will be taken every time
@@ -47,7 +49,8 @@
struct ap_matrix_dev {
struct device device;
atomic_t available_instances;
- struct ap_config_info info;
+ struct ap_config_info config_info;
+ struct ap_config_info config_info_prev;
struct list_head mdev_list;
struct mutex mdevs_lock;
struct ap_driver *vfio_ap_drv;
@@ -118,6 +121,9 @@ struct ap_matrix_mdev {
crypto_hook pqap_hook;
struct mdev_device *mdev;
struct ap_queue_table qtable;
+ DECLARE_BITMAP(apm_add, AP_DEVICES);
+ DECLARE_BITMAP(aqm_add, AP_DOMAINS);
+ DECLARE_BITMAP(adm_add, AP_DOMAINS);
};

/**
@@ -148,4 +154,9 @@ void vfio_ap_mdev_remove_queue(struct ap_device *queue);

int vfio_ap_mdev_resource_in_use(unsigned long *apm, unsigned long *aqm);

+void vfio_ap_on_cfg_changed(struct ap_config_info *new_config_info,
+ struct ap_config_info *old_config_info);
+void vfio_ap_on_scan_complete(struct ap_config_info *new_config_info,
+ struct ap_config_info *old_config_info);
+
#endif /* _VFIO_AP_PRIVATE_H_ */
--
2.31.1